Specifications

Page 4–6
FOCUS System Manual
4.4.2 Power Supply Testing
To test a single power supply in operation,
complete the following steps:
1. Connect a variable power source.
Connect the wires from a variable power
source to the screws in positions 1 and 2 on
the J13 terminal block on the rear of the
chassis (see Figure 4-1).
2. Slowly decrease the voltage from the dc
power source.
Slowly decrease the voltage 20% from the
rated dc voltage. The status LED should
remain green to indicate normal operation.
To test a dual power supply in operation, first
perform the test above for the main Power Supply
Module and then complete the following steps:
1. Connect a separate power source for the
standby power supply.
Connect the wires from a second variable
power source to the screws in positions 3 and 4
on the J13 terminal block on the rear of the
chassis (see Figure 4-1).
2. Unplug the main Power Supply Module.
Disconnect the main Power Supply Module
by sliding it about halfway out of the chassis
slot. Make sure the chassis is still operating as
before to determine if the standby Power
Supply Module is operational. The status LED
on the standby Power Supply Module should
be green.
3. Reconnect the main Power Supply Module.
Re-insert the main Power Supply Module by
sliding it all the way into the PWR-MAIN
slot, as described in the “Installation” section
earlier in this chapter.
4. Slowly decrease the voltage from both
variable dc power sources.
Slowly decrease the voltage 20 % from the
rated dc voltage. The status LED on both
modules should remain green to indicate
normal operation.
5. Set both power sources to the normal
operating voltage.
Return the voltage on both variable power
sources to the normal rated dc voltage. The
status LED on both modules should remain
green to indicate normal operation.
6. Lock the FOCUS chassis.
Lock the chassis using the “Lock
Configuration” command on the FCS Setup
menu or click on the “Lock FOCUS Chassis”
speed button .
7. Unplug the main Power Supply Module.
Disconnect the main Power Supply Module
by sliding it about halfway out of the chassis
slot. The minor alarm LED on the standby
Power Supply Module should come on.
8. Reconnect the main Power Supply Module.
Re-insert the main Power Supply Module by
sliding it all the way into the PWR-MAIN
slot, as described in the “Installation” section
earlier in this chapter.
9. Unplug the standby Power Supply Module.
Disconnect the standby Power Supply Module
by sliding it about halfway out of the chassis
slot. The minor alarm LED on the main Power
Supply Module should come on.
4.4.3 Acceptance Test with
Multiple Chassis
To test multiple chassis, repeat the above steps for
each chassis. The only thing you do differently
here is set the remaining chassis as “slaves.” That
is, in Step 13 earlier (Initial Single Chassis
Acceptance Test), you select the “Make Device a
Slave” option for each of the other terminals.
Then do the following, beginning at the “master”
chassis: