BiRa Systems |
POWERED CAMAC CRATE
Bi Ra Model 135A-SC is a special powered CAMAC crate designed specifically for the end-users at Stanford Linear Accelerator Center. The crate and power supply conform to all ANSI/IEEE 583-1982 specifications. This unit is made up of two basic components: The SLC crate and the Model 6700 power supply (700 watt).
The SLC crate incorporates the CAMAC dataway with an 86-contact PC edge connector soldered at each station. A secondary dataway, the auxilliary backplane, is directly mounted above the CAMAC dataway and is protected by a removable cover. The crate's front panel and top panel, also removable, directs and exhausts air flow to the upper rear of the crate. The redesigned crate supports the rear-mounted power supply and allows one person to remove and replace it without removing the crate from the rack. Electroless nickel-plated guide rails insure smooth alignment and minimize air obstruction for cooling of the modules and provides excellent ground return (especially for analog-designed modules).
The Model 6700 Power Supply employs the Ferro-Resonant transformer and Darlington transistors to achieve higher efficiency and reliability. The power supply is modular in construction, single connector attachment, and automatically latches into position. The power supply is self-ventilated by a large internal blower(EBM) (rated at 236 CFM) to maximize cooling area and air flow in order to enhance performance and reliability. The power supply outputs are protected from over-voltage and over- current. Positive and negative regulator cards are modular so they may be serviced and removed easily. Additional features include handles for maneuverability and safety, voltage test points,and instant visibility and easy access to all fuses.
| Dimensions | 19" rack mount; 12.25" height; 21.75" depth |
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| Weight | 39 lbs. (17.7 kg) |
Maximum output currents from:
| +/- 6V | Up to 60 Amps from either supply. 90 Amps combined sum. See Graph 2. |
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| +/- 24V | 8 Amps maximum each. Subtract current drawn by +/- 12 V load. |
Subtract current drawn by +/- 12V load.
| +/- 12V | 4 Amps maximum each. Derived from +/- 24 V supply. |
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Note: 1) All models provide current foldback limiting and over voltage crowbar protection for all output for all output voltages.
Note: 2) On all models the +/-12V is derived from +/- 24V sources.
| Ripple | <15 mV peak-to-peak (50MHz bandwidth). |
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| Regulation | +/- 0.01 % line or load (at the sense leads). |
| Temperature Coefficient | <0.1%/degC. |
| Long Term Stability | < 0.1%/24 hours at constant load and temperature. Measured after 1-hour warmup. |
| Tracking | During turn-on all six output voltages rise together. Risetime 10 msec. |
| Overload Protection | All outputs are protected against overload by current limit circuits. Short circuit proof. All outputs switch off within 20 msec of detected overload. |
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| Overvoltage Protection | All outputs are protected against transient overvoltages by high current transient suppressors. |
| Thermal Protection | A thermal sensor shuts down the supply in the event of a thermal overload. A front-panel thermal overload light on the blower module indicates an overtemperature condition in the power supply. |
| Operating Range | Full 700 W output from 0 degC to 40 degC ambient temperature. Derate at -15 W/degC above 40 degC. Maximum ambient temperature 50 degC. See graph 1. |
120V AC 60Hz (103 - 130V AC).
14.2 Amps rms at 120 V.
52 lb. (23.6 kg).
Power supply options same as MODEL 6700:
| Feedback | info@bira.com | Home Page |
Bi Ra Systems,
Incorporated
2404 Comanche Road NE
Albuquerque, New Mexico 87107
Ph : 505-881-8887
Fax:505-888-0651