MODEL 6700-SCB
POWERED CAMAC CRATE (700 WATTS)

DESCRIPTION: MODEL 6700 POWERED CRATE
The Model 6700 is a Powered CAMAC Crate which fully complies with CAMAC specification which fully complies with IEEE-583. The Crate is housed in 12.25" (7u) side panels which provide the mounting hardware for the Blower and Power Supply modules. Both Power Supply and Blower modules are designed for simple plug-in installation with no connectors to attach. Power Module cooling is provided by an internal fan for drawing air form the inside of the relay rack (no air is drawn from the crate blower area). The Blower module contains the crate cooling fans and the current/voltage metering of the Power Supply outputs. Various options are available to this unit and may or may not be installed in the unit. All options are described in this manual and are indicated as options. The maximum output power of the pairs (+/-) are best described as being power limited rather than current limited. With none of the 24V outputs being utilized, considerably more current can be drawn from the 6V outputs than is shown on the specification sheets under normal conditions. However, when operating near the upper limits of input line voltage and temperature, it is best to operate within the specified current limits.

1.00 INSTALLATION:
The blower is inserted at the front of the crate and secured by two latches at the rear of the blower. To release, simply grab blower handles and pull. The power supply module is inserted from the rear of the crate by placing the unit on the support tray and sliding it towards crate to latch. A third latch at the rear of power supply insures positive attachment. To release the power supply module the rear latch must be released first. The latches on the front of the power supply are released by pushing the two white buttons down that latch the power supply.

2.00 MAIN CHASSIS:
2.10 INPUT POWER SELECTION:
Power is applied to the power supply through a standard international AC receptacle at the rear of the power supply, and to the blower module through fuses F15 and F16. The front panel switch (S1) applies power to the three front blower fans and back to the power supply fan and the three rear fans in the blower units. Power to the transformer goes through the thermal switches Th-3 and TH-4 (one each mounted on positive and negative side of the main heat sink) and under over-temp conditions, power will be removed from the transformer, the power module fan, and three of the blower fans. Power will resume when the over-temp condition drops approximately 17 degrees. Thermal warning switch Th-1 and Th-2 (also mounted on the main heatsink) will cause the Hi-Temp lamp on the Blower front panel to light when the heatsink temperature approaches within approximately 10 degrees of the Th-3 and Th-4 setting.

Transformer T-1 provides three outputs: a heavy current winding for the 6V regulators, a medium current winding for the 24V regulators, and a light duty winding for the regulator boards bias supply. Rectification of the heavy current winding is accomplished with heavy duty half wave rectifiers and should by replaced with the same type. The light current (50mA.) fused winding provides a controlled turn-on and turn-off bias voltage to the regulator boards that effectively eliminates overshoots when turning the power on or off.

2.20 MAIN HEATSINK
The main heatsink is assembled in two sections; a negative and a positive side. Each side contains the transistors (4 for the 6V, 1 for the 12V, and 1 for the 24V output) and thermal switches described above. Each drive transistor is individually fused at the top of the power module. The fuse tray is assembled with fourteen (14) fuses associated with 7 mounted on the positive side and 7 mounted on the negative side.

2.40 POSITIVE REGULATOR BOARD:
The positive regulator board contains four regulator sections: a low power 30V DC supply, a 6V DC supply, a 24V DC supply, and a 12V DC supply.

2.41 LM305H POSITIVE REGULATOR BOARD:
The LM305H positive voltage regulator develops an internal voltage reference of approximately 1.6 volts at pin 5 which is compared with the sensed voltage at pin 6. Pin 3 is the input voltage and pin 4 is ground. The output drive currents are seen at pin 1 and the IR drop between pins 1 & 8 clamps the output drive current at a maximum level. Frequency compensation is set by the size of the capacitor between pins 7 & 6. A capacitor between pins 5 & 4 is used to reduce the amount of noise generated by the internal voltage reference. The LM305 is capable of driving up to 65 amps with the appropriate current amplifiers and frequency compensation networks. However, although the LM305 can be connected such that it will exhibit current limit-foldback characteristics, for output currents in excess of 5 amps it is necessary to provide external circuitry for these functions as the temperature coefficient of the internal circuitry cannot stay within required limits. The LM305's used in this equipment are limited to less than 30mA. Output drive current is at pin 1 and has been tested and burned in at that level with a 50V supply. At the 40 amp output of the 6V regulators to a standard CAMAC crate, the LM305 will with the sense to output resistors removed) regulate to better than .1%.

2.42 POSITIVE BIAS SUPPLY:
The 30V DC supply provides a low noise, low ripple bias volt to the three high current regulator circuits. This supply is designed to control the turn-on and turn-off characteristics of the output regulators and further reduce the ripple and noise beyond the normal ability of the LM305 regulator device used in all four circuits.

2.43 COMMON COMPONENTS:ALECS
Various components of the positive regulator board are common to all the regulators. R9 is the common resistor link between all of the sense return lines and ground return and may be replaced with a 1 amp diode if more sensitive regulation is required. D1 is the common crowbar zener reference voltage (6.2). The 30V DC output is common to all the regulator circuits. The 30 volts has a current limit-foldback circuit (R43-45), and will shut down all the regulators if overdriven.

Preload Resistors: Each of the output regulators has a preload resistor which is intended to set the minimum loading of the regulator and serves to reduce or eliminate overshoot problems. The +6V preload is R1 (12-15 ohm) for the +12V and R40 (200 ohm) for the +24V regulator.

2.44 +6 VOLT REGULATOR CIRCUIT:
The 6 volt regulator circuit consists of three sections: the regulator-driver (U1 and Q4), the current limit-foldback circuit (Q5, Q12), and the crowbar circuit (Q6, Q7, & Q9). The regulator U1 provides drive current to Q4 thru the current limit resistor R14. R14 limits the maximum level of drive current to approximately 30mA. Q4 provides drive current to the resistors R2, R3, R4, & R5. These resistors provide the drive to the output transistor mounted on the main chassis heatsink.

To improve the efficiency of the 6 volt outputs, a couple of improvements were made to this power supply over older units. The transformer secondary winding was reduced and the drive to the regulator and the output transistors was provided from the 12 volt output and /or the unregulated 6 volt supply through a diode gate. The drive supply from the 12 volt output is before the current sense resistor and does not register on the meter circuit. Under normal conditions, the unregulated 6 volt will be higher than the 12 volt output and provide all the drive current. Under conditions of low line voltage and high output current from the 6 volt regulator, the drive current will come from the 12 volt output. In the +6 volt regulator circuit, the diode gate is D4 (12 volt output) and D3 (6 volt unregulated supply).

2.45 CURRENT LIMIT-FOLDBACK CIRCUIT:
The current limit-foldback operates as follows: Q12 is connected as a diode to clamp the resistor divider string RP1, R6, & R8 to a common point with the sense resistor (R1 on the main chassis) and the load. Transistor Q5 acts as a current shunt to the output of the U1 regulator when the voltage drop across the sense resistor (R1 on the main chassis) exceeds the drop across RP1 & R6. Thus the setting of RP1 controls the point at which the regulator will begin to current limit.

Once the regulator begins to limit, the output voltage will begin to drop and because RP1, R6 & R8 are clamped directly to the output thru Q12, the voltage across RP1, R6 will also drop causing the current limit set point to be reduced and result in the current foldback characteristic. If the load is further increased, the current will continue to drop until it reaches approximately 20% of the rated output. The minimum foldback current is determined by the relationship between the resistor divider string RP1, R6, & R8, a divider string made up of the sense resistor, the load resistance, the resistance of the output lines to the load, and the ratio of the voltage drop across the clamp Q12 to the output voltage.

When troubleshooting a bad regulator, it is always necessary to remove Q5 from the circuit as faults in the current limit circuitry are the most common cause of regulator problems and even when operating properly, the current limit circuit will mask their faults in the regulator.

2.46 CROWBAR CIRCUIT:
The crowbar circuit consists of a differential amplifier Q7 & Q9 which compare a 6.2 volt reference to the output voltage across the divider string R17 & R18. As the divider string is sampling the total output voltage including drops in the return and output lines, the trigger point will vary compared to the sensed voltage at the load but should not exceed 7.5 volts in any case. Problems with false triggering generally are caused by over-driving the output lines with excessive combined currents of the 6 volt outputs or bad connections of the output plugs or wiring to the plugs. When the sensed output exceeds the reference voltage, Q9 will drive Q6 sufficient to turn on the SCR. If the regulator circuitry is operative, the regulator will go into foldback current limiting until the supply is turned off. If the regulator circuitry is inoperative, the SCR will blow all the driver fuses.

2.47 +24 VOLT REGULATOR CIRCUIT:
The operation of the +24 volt regulator circuits are identical to the +6V. The regulator U3 drives Q1 thru the current limit resistor R36. Q1 drives the output transistor (mounted on the main chassis heatsink) direct. Q17 & Q14 are the clamp and current shunt of the current limit-foldback circuit. Q15 & Q16 are the crowbar differential amplifier and Q8 is the SCR gate driver.

2.48 +12 VOLT REGULATOR CIRCUIT:
The operation of the +12 volt regulator circuits are identical to the +24V. The regulator U2 drives Q3 thru the current limit resistor R29. Q11 is the current limit clamp and Q10 is the current shunt amplifier. There is no crowbar circuit for the +12 volt output. The 12 volt drive current is derived from the output of the +24 volt regulator before the +24 volt sense resistor. R27 (.15 ohm, 2watt) is the current sense resistor for the 12 volt output.

2.50 NEGATIVE REGULATOR BOARD:
The negative regulator board contains four regulator sections: a low power -30 volt bias supply, a -6 volt regulator, a -24 volt regulator, and a -12 volt regulator. These circuits operate in the same manner as the positive regulator board circuits except that they are inverted (that is, pnp transistors for npn's) and the basic regulator is slightly different in the way it generates its reference voltage.

2.51 LM304 REGULATOR:
The LM304 negative regulator develops a reference voltage, across the resistor(s) connected between pins 1 & 9, with an internal current source set by the resistor connected between pins 2 & 3. The voltage developed across pins 1 & 9 will be 1/2 the output voltage sensed at pin 8. The output drive is from pin 7 and the maximum current delivered is limited by the resistor connected between pins 6 & 5. The LM305H's used in this equipment are tested and burned in with an input of 50 volts.

2.52 COMMON COMPONENTS:
Components common to all the regulators on the negative board include: R8, the common resistor link between all the sense return lines and ground return, may be replaced with a 1 amp diode if more sensitive regulation is desired. D2 develops the common crowbar zener reference voltage (-6.2). The -30 volt bias supply is common to all the circuits.
Preload Resistors: As on the positive regulator board, there are three preload resistors. R1 (12-15 ohm) is the preload resistor for the -6 volt regulator, R38 (200 ohm) preloads the -24 volt, and R24 preloads the -12 volt regulator.

2.53 -6 VOLT REGULATOR CIRCUIT:
The -6 volt regulator circuit consists of three sections: the regulator-driver (U1, Q5), the current limit-foldback circuit (Q4, Q9), and the crowbar circuit (Q6, Q7 & Q8). The LM304 (U1) regulator gets drive current from the current limit resistor R20 and drives Q5 to provide drive current to the drive resistor bank consisting of R2, R3, R4, & R5. Output voltage adjustment RP3 & R31 develop a reference voltage from the 1 amp current source in U1 set by R10. The reference voltage is compared to 1/2 the voltage seen at pin 8. Frequency compensation is internal and capacitor connected across pins 4 & 5. The capacitor connected across pins 1 & 9 tends to reduce noise generated by the reference current source.
The diode gate which supplies drive current to the -6 volt regulator and output transistors (see explanation under the +6 volt circuit), consists of D3 (drive form the -12 output) and D1 (drive form the unregulated -6 supply).

2.54 CURRENT LIMIT-FOLDBACK CIRCUIT:
The current limit-foldback circuit, consisting of the diode connected clamp Q9, current shunt Q4, and resistor divider string R6, R7, & RP1, operate in the same manner as the +6 volt circuit except for the pnp-npn inversion.

2.55 CROWBAR CIRCUIT:
The operation of the crowbar circuit on the negative regulator board is identical to that of the positive board.

2.56 -24 VOLT REGULATOR CIRCUIT:
The operation of the -24 volt regulator is identical to that of the -6 volt circuit.

2.57 -12 VOLT REGULATOR CIRCUIT:
The -12 volt regulator derives both its supply and drive form the -24 volt output. Both are taken before the -24 volt output sense resistor and are not seen by the meter. The regulator U2 drives the output through Q2. The clamp and shunt amplifier for the current limit-foldback circuit are Q10 and Q11 respectively. There is no crowbar circuit for the 12 volt output and it is possible for the output to go to -24 volts if the driver or regulator circuit is faulty. However, a fault in this circuit will generally cause the output driver to open and the output to go to ground rather than -24 volts. R23 (.15 ohm) is causing the -12 to go into current foldback.

3.00 BLOWER MODULE:

3.10 COOLING:
The Blower module contains six fans, each capable of approximately 110 CFM of air drawn through three washable filters housed in the Blower unit. The filters are made of foam and should be removed and cleaned when an accumulation of dirt or dust can be seen. The front contains the meter (3 1/5 digit LCD), power switch, Meter switch, test points for all outputs, power-on neon indicator lamp, and the HI-TEMP lamp (neon on regular blower, LED on a Status Bit blower). A blower with the Status Bit option will also have BNC connector.
CAUTION: The output voltage test points are connected directly to the output sense leads.

3.30 METERSWITCH:
The meterswitch consists of a printed circuit board, a five button switch assembly, and the components needed to power the LCD meter and equalize the current sense voltage for proper reading on the meter. The resistor-zener diode string, R8 & D2, provide the isolated 9V power required by the LCD voltmeter. The LCD operates at a full scale reading of 199.9 with an input of 1.999 volts. For voltage monitoring, the output sense leads are applied to the 8094ASY output thru a resistor divider network (R9 & R10) which results in a 24.0 reading for 24 volt inputs, 12.0 reading for the 12 volt inputs, and a 06.0 reading for 6 volt inputs. For current monitoring of the 6 volt outputs, the LCD meter will see .010 volts for each amp across the main chassis resistors R1 or R3, resulting in a reading of 01.0. For current monitoring of the 12 volt outputs, the voltages developed across the .15 ohm sense resistors (mounted on the regulator boards) are applied to the 8094 ASY output thru a resistor divider network with the same result as with the 24 volt. Components R7 and D1 are not required.

3.40 LCD DIGITAL VOLTMETER:
The LCD Digital Voltmeter consists of a .5" 3 1/5 digit LCD display, a printed circuit board, a 7106 Analog to Digital converter and components needed to provide the user with voltage readings to a tenth of a volt and current readings accurate to two-tenths of an amp. The decimal point is set at the factory to display tenths and is used to establish a floating reference thru R1 & R4. Variable resistor R4 is the reference set point and can be adjusted by the user to effect the most accurate reading against a particular monitor point. The reference is set at the factory to give the most accurate readings against the 6 volt output voltages. If it is desirable to have more accurate reading on a current monitor point, apply the output voltage thru a standard meter shunt, and set the R4 for an exact reading by first going to the next points. This should result in an accurate reading for that monitor point but can leave the other monitor points with an accuracy of only two or three tenths.

Test points for all the output voltages are provided on the front directly to the right of the LCD meter. The black test point is meter return with the positive voltages on the left row of red test points and negative voltages on the right row as marked on the front panel.

4.00 CRATE DESCRIPTION:
The Model 6700 CAMAC Crate consists of a Dataway motherboard in a 7U high case. The extra 2U is used to mount a Blower module which provides the metering circuits for the outputs of the Power Supply module and blowers for the cooling air to the crate.

4.10 DATAWAY:
The dataway motherboard is a 5 layer multilayer printed circuit board which uses high quality card edge connectors which are soldered at all locations. Damage to the card edge connectors generally occurs at stations 24 & 25 and is due to the insertion of double-width modules which are not properly assembled. Mounting bars for the Dataway provide a cam action which forces alignment of the module card edge but cannot correct for those modules with wide connector strips or a heavy burr on the connector strip. Repair of a Dataway connector is almost impossible and customers are advised to return the Dataway assembly or entire Crate to the factory for repairs.

4.20 GROUNDING:
A two (2) position terminal block is mounted to the rear of the top interface cover to provide customer selection of the system grounding. The two outside positions are wired to the chassis of the Crate, Blower, and Power module. The inside positions are wired to the Clean Earth bus bar and the Power Supply return bus bars. The location is clearly marked on the interface cover. A three position jumper is provided (shipped with all three grounds shorted together) which can be used for selectively shorting any two together.

4.30 JACKING BARS:
The steel jacking bar is tapped and labeled according to the CAMAC specifications and is replaceable. Although we have had very few problems with these in the past, the tapped holes are occasionally stripped and it generally takes less than half an hour to replace the entire bar. An optional NIMs jacking bar can be furnished upon request.

4.40 POWER CONNECTOR:
Due to the increased power requirements (some applications are now using 75 amps from the 6 volt outputs), the number of pins providing the 6 volt power to the Dataway has been increased form 3 to 5 amps. All input voltage and current monitor wiring also go through the power connector to the blower.

5.00 STATUS BIT DESCRIPTION:
The Status Bit Option provides a relay closure to the chassis when any of the monitored voltages, currents, shared currents, and the over-temp thermostat are outside the set tolerance. The reed relay contact is a normally closed contact and will be closed with the power off. The relay contact is open when all inputs are within set tolerances.

5.20 GENERAL:
Power is supplied by the +6 and -6 sense inputs. The positive voltage inputs are applied directly to the High /Low comparator inputs through resistor divider networks. The negative voltage inputs are applied to the comparators through inverting amplifiers with gains less than one. The current shunt inputs are applied first to a level shifting differential amplifier which shifts the common mode level to ground (0 volts), from the level shifting amplifier to an adjustable gain amplifier which provides a 2.31 volt output at the desired maximum load condition. Positive current amplifier outputs are applied to the High comparators and to a shared current summing amplifier. The negative current amplifier outputs are applied to the summing amplifier and through an inverting amplifier to a High comparator (sum of both positive and negative currents).

The Hi-Temp thermostat is wired to a pair of comparators, one of which drives the front panel Hi-Temp LED and one which is "Ored" with the other comparator outputs to produce a status bit relay indication. All comparator outputs are "Ored" together to drive the status bit relay driver.

5.30 COMPARATORS:
Two comparators are used, High comparators (comparing the input against a +2.31V reference) and Low comparators (comparing the input against a + 2.31V reference). All comparators (except the Hi-Temp LED driver) cause a status bit indication (relay closure to chassis) is the compared inputs are HIGHer than the High reference or LOWer than the Low reference.

5.40 REFERENCE SOURCE:
The reference source VR-1 and amplifier IC8-1 provides the High/Low references of +2.31 & 2.06 volts respectively. VR-1 provides an output of +2.50V J (nominal) to the unit gain buffer amplifier IC8-1 through a resistor divider network. The output of the amplifier is applied to a resistor divider network to develop the 2.31 and 2.06 volt references.

5.50 VOLTAGE INPUTS:
Positive voltage inputs are applied directly to a High/Low comparator pair through a resistor divider network which results in a +2.18 volt level when the input is at nominal. The negative voltage inputs are applied to a High/Low comparator pair through an inverting amplifier with a negative gain such that the result is +2.18 volts when the input is at nominal. All circuits are identical in operation with circuit differences being only the resistor divider networks. Inputs are clearly marked on the schematic with a "S" suffix (+6S for the positive 6V). Outputs of the comparators are clearly marked as "H" (High), "L" (Low), or "I" (Current). Current designations without polarity marking are the shared current comparator outputs (such as 24I).

5.60 CURRENT INPUTS:
All current monitoring circuitry is identical in operation except for the resistor divider networks at the input sections. The following description will be of the 24V section but will apply to the 6 & 12V sections as well.

Inputs to the current monitoring circuitry is developed across very low ohmic value resistors connected in series with the high end of the power supply outputs and the load. This means that the 1+ and 1- inputs of the +24V power supply output will have a common mode voltage of +24V under no load condition and rise somewhat higher as the load is increased. Divider networks at the input to the first amplifiers reduce the common mode voltage to a level below the amplifiers supply voltages (+6V). The first amplifier then acts to shift the common mode voltage to ground (0V). R11 is used initially to adjust the output of these level shifting amplifiers to 0V at no load. Outputs of the LS (level shifting) amplifiers are applied to the inputs of adjustable gain (AG) amplifiers which are adjusted to provide a 2.31V output at the maximum load condition desired. Outputs of the positive input sides are positive and negative sides. Outputs of both AG amplifiers are applied to a summing amplifier which will produce a +2.31V output when the absolute sum of the two inputs equals 2.31 volts. The outputs of the negative AG amplifier is also applied to a High comparator through a unity gain inverting amplifier. The output of the positive AG amplifier is applied directly to a High comparator.

To adjust the amplifiers, first set each LS amplifier to 0V with no load conditions. Adjust each load to the desired maximum load and adjust the individual AG amplifiers until you get a status bit indication. All other current and voltage amplifiers are fixed and require no adjustment.

5.70 TROUBLESHOOTING:
Due to the large number of comparators "ORed" together, it is necessary to check the inputs of each comparator to determine which circuit is in "status bit" if faulty. If the reference voltage is low, one of the comparators is probably loading it and it may be necessary to remove them one at a time until the loading condition is removed.

WARRANTY
Equipment manufactured by Bi Ra Systems for use in the United States is warranted against defects in design, workmanship, and materials for a period of one (1) year from the date of shipment. Bi Ra Systems will repair or replace, at its option, any such equipment found to be defective on a return to factory basis. Repair charges will be applicable after the warranty period has expired. Transportation charges for shipping the equipment to Bi Ra Systems shall be paid by the customer, while transportation charges for the return of the repaired equipment will be paid by Bi Ra Systems. Priority shipping methods are available at the customer's expense. SOFTWARE products by Bi Ra Systems are furnished under the terms and conditions of a separate Software Product License Agreement is warranted for a period of ninety (90) days from the date of shipment to conform to the Software Product Description (SPD) applicable at the time of purchase. This warranty is contingent upon the proper use of the software as detailed in the Software Product License Agreement and is limited to the remedy of any non-conformance of the Software to the SPD. PRODUCTS PURCHASED BY BI RA SYSTEMS FOR RESALE WILL CARRY THE ORIGINAL EQUIPMENT MANUFACTURER'S WARRANTY, IF ANY.

These warranties shall not apply to equipment or software that has been modified or serviced by other than a Bi Ra Systems or an authorized distributor service engineer.

All warranties are contingent upon proper use of the product or system. These warranties will not apply (i) if adjustment, repair or parts replacement is required because of accident, unusual physical, electrical, or electro-magnetic stress, neglect, misuse, failure of electric power, air conditioning, humidity control, transportation, failure to rotating media not furnished by Bi Ra Systems, operation with media not meeting or not maintained in accordance with Bi Ra Systems specification or causes other than ordinary use; or (ii) if the product or system has been modified by the purchaser; or (iii) where Bi Ra Systems serial numbers or warranty date decals have been removed or altered. In addition to the forgoing, any application on-site warranty will not apply (i) if prerequisite equipment (as specified by Bi Ra Systems price list, equipment specifications, or contract(s) is missing, or (ii) if the product or system has been installed by the purchaser without the supervision of or prior written approval of Bi Ra Systems. Equipment may contain used parts which are equivalent to new in performance when used in the equipment. BI RA SYSTEMS MAKES NO WARRANTY OR MECHANTABLILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY OTHER WARRANTY EITHER EXPRESS OR IMPLIED, EXCEPT AS IS EXPRESSLY SET FORTH HEREIN.
Outside the United States, the equipment warranty is limited to the replacement of the equipment and excludes shipping, insurance, taxes, forwarders' fees, customs, or any other charges.
THE WARRANTY PERIOD MAY VARY IN COUNTRIES OUTSIDE THE UNITED STATES. CONTACT BI RA SYSTEMS OR YOUR LOCAL AUTHORIZED DISTRIBUTOR FOR SPECIFIC WARRANTY DETAILS.

LIMITATIONS OF LIABILITY
The purchaser's exclusive remedy or any claim of any kind for loan or damage connected with, or resulting from the design, manufacture, sale, delivery, resale, or repair or use of any products furnished by Bi Ra Systems including but not limited to any claim of negligence or other breach, shall be the repair or replacement, F.O.B. factory, of the product or part thereof giving rise to such claim. Bi Ra Systems liability for such repair or replacement shall in no event exceed the contract price allocable to the products or part which gives rise to the claim. BI RA SYSTEMS SHALL IN NO EVENT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.

RETURN OF PRODUCTS
Bi Ra Systems must be notified before any product is returned for any reason. The Customer Service Department must issue a Return Material Authorization (RMA) number before any product can be accepted for credit, exchange, or repair. In order to provide an RMA number, Customer Service will need the complete model number, serial number, original purchase order number, and details regarding the reason for return and the service required.

All returns for CREDIT or EXCHANGE are subject to Bi Ra Systems approval and will incur a minimum restocking charge of ten (10) percent, as well as any incoming transportation charges or other fees incurred by Bi Ra Systems.

All returns for WARRANTY REPAIR must include a description of the problem and the name of a technical contact in case the problem must be discussed. If the product is out of warranty, the customer must contact Bi Ra Systems for an estimate of the repair charges and include a purchase order number for the estimated repair charges.

Transportation charges for shipping the products to Bi Ra Systems shall be paid by the customer. Transportation charges for the return of the products that have be exchanged shall be paid by the customer, while transportation charges for the return of the repaired equipment will be paid by Bi Ra Systems. The return shipment will be by UPS services, air freight, or truck. Premium methods of shipment are available at the customer's expense and will be used only when requested. If Bi Ra Systems selects the carrier, Bi Ra Systems will not thereby assume any responsibility or liability in connection with the shipment nor shall the carrier be in any way construed to be the agent of Bi Ra Systems.
After obtaining a Return Material Authorization (RMA) number, customers should return the product to:
   

    BI RA SYSTEMS, INC.
    2404 COMANCHE NE
    ALBUQUERQUE, NEW MEXICO 87107
    TELEPHONE: (505) 881-8887
    FAX:(505) 888-0651

SERVICES
Contact Bi Ra Systems for details regarding the following services: complete module design and development for both CAMAC and FASTBUS products (this includes the design, complete drafting package from schematic to artwork done on a CADNETICS/INTERGRAPH CAE/CAD System, proto type development and testing, and production level products), Systems Integrated, Installation, On-Site Warranty Repair, Module Exchange Program, Service Contracts, Applications Software Support, and Training.

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Bi Ra Systems, Incorporated
2404 Comanche Road NE
Albuquerque, New Mexico 87107
Ph : 505-881-8887
Fax:505-888-0651