MODEL 5877

CAMAC HIGH VOLTAGE MODULE 

Power Supply Module

Features

The BiRa Model 5877 module design features include:
· Indefinite output short-circuit protection.
· Output Ripple Stripper Filter.
· Wrap-around Mu-Metal shielding.
· Output voltage monitors.
· Output current monitors.
· Standby/Disable Mode.
· High MTBF

APPLICATIONS

· Large or small system flexibility.
· Laboratory power requirements: for detectors,
Ion chambers, Photo-multipliers, Tracking chambers.

General Description

The BiRa Model 5877 is a dual wide, dual channel,
16-bit DC high voltage DAC, CAMAC module. This module
was designed at BiRa for use at LLNL. Each channel 
is capable of 267Vdc @ 50ma. One channel is of 
positive polarity and one negative. The module 
includes all Commercial Off the Shelf (COTS) components.

 Specifications

· Physical Dimensions : Standard 2-wide CAMAC module.
· Operating Temperature : +10 to +50° C
· Storage Temperature : -40 to +85° C
· High Voltage Output Signals :
    Both High Voltage output signals interface using SHV connectors.
· Output voltage monitors :
    Both output voltage monitor signals interface using 2-pin lemos.
· Output current monitors :
    Both output current monitor signals interface using 2-pin lemos.
· Output enable indicators :
    Both high voltage output signals have lighted output enable indicators.
· Module address indicator :
    Anytime module is addressed indicator is lighted.
· Monitor Outputs
    Voltage Monitor Outputs features a 100:1 divider.
    Current Monitor Outputs features a scale factor of 80ma/80mv.
· HV Outputs :
    Output Voltage Range = 0 to +/- 267Vdc.
    Power @ Max. Eout = 13.35 Watts, each channel.
    Current, Iout Entire Output Voltage Range = 50 ma per CH.
    Dynamic Load Regulation @ ½ to Full load, Max. Eout per .1ma = <.20 V pk.
    Line Regulation @ Max. Eout, Full Power = <0.01% Vdc.
    Static Load Regulation with No Load to Full Load, Max. Eout = <0.01% Vdc.
    Stability with 30 min. warm-up, per 8hr./per day = <0.01% / <0.02% Vdc.

Software Description

CAMAC COMMANDS

F0 A0 Þ Reads last entered data for positive high voltage channel.
"X" is returned if command is valid and "Q" is returned
if the positive high voltage power supply is enabled.

F0 A1 Þ Reads last entered data for negative high voltage channel
after hardware inversion. "X" is returned if command is valid
and "Q" is returned if the negative high voltage power supply
is enabled.

F16 A0 Þ Loads the positive high voltage channel 16-bit DAC register.
"X" is returned if the command is valid.

F16 A1 Þ Loads the negative high voltage channel 16-bit DAC register.
"X" is returned if command is valid.

F24 A0 Þ Disables the positive high voltage power supply. "X" is
returned if command is valid.

F24 A1 Þ Disables the negative high voltage power supply. "X" is
returned if command is valid.

F25 A0 Þ Enables the positive high voltage power supply. "X" is
returned if command is valid.

F25 A1 Þ Enables the negative high voltage power supply. "X" is
returned if command is valid.

The digital input code in hex for CAMAC writes are :

Full Scale Þ 7FFF
3/4 Scale Þ 4000
Half Scale Þ 0000
1/4 Scale Þ C000
Zero Þ 8000

Note : (267/2 to the 16^th ) – 1 is divided into the desired voltage.

Test data for "CAMAC Code", "Output Voltage", "Vmon" and
"Imon" for both supplies in 28 steps of 10V increments can be found in
Appendix C.