FORUM OPERATION AND MAINTENANCE MANUAL 9601
PAGE 62
POWER SUPPLY
The FORUM power supply is a rack mounting unit, occupying 2U
of rack space. The unit is fan cooled but should still be given
adequate ventillation and air circulation when installed.
The AC mains input to the power supply can be between 90 volts
and 240 volts 50 - 60Hz AC, with the operating voltage set by
internal switches.
There are four internal switches which determine the operating
voltage of the unit. DO NOT CONNECT THE POWER SUPPLY
TO THE MAINS WITHOUT CONFIRMING YOUR VOLTAGE
SETTING.
Use a screwdriver to move the switches to the correct setting.
The DC output voltages are +17V, -17V and +48V.
The fuse ratings areQ
240/230/220
T3.15A
120/100/90
T6.3A
NOTE. The PSU has a ground lift switch, which when operated,
can leave the console floating with respect to ground.
100 volts
120 volts
240 volts
230 volts
220 volts