OPERATING PROCEDURES
DC TRANSFER MODULE/BUS MONITOR MODULE REMOVAL DURING OPERATION
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I-E96-508C
®
Bus Monitor Module
The bus monitor module (BMM) has two LEDs: module status
and system status. The module status LED is green when the
module is operating properly. It turns red if the module fails. A
failure means that the internally generated supply voltages or
references have fallen below the minimum acceptable level.
The system status LED is green when everything in the system
is satisfactory. If for some reason a bus voltage fails or falls out
of tolerance, one of the DC inputs fails, external status, auxil-
iary power supply inputs are low, or the DTM module fails, the
LED turns red.
Power Module
The power module has one LED, module status. This LED is
green when the module is operating normally. It blinks green if
the five VDC or 24 VDC circuits overload. It turns red if the 15
VDC circuits overload, if one or more outputs fail, or if module
temperature goes beyond acceptable levels.
DC TRANSFER MODULE/BUS MONITOR MODULE REMOVAL DURING OPERATION
The DC transfer module and bus monitor module can be
removed while the system is in operation.
NOTE: If power from the operational line is lost and the DTM mod-
ule is out of the system the entire power system will go down. Like-
wise, the power system status is not available to the user while the
BMM module is out of the system.
RECOMMENDED START-UP PROCEDURES
Follow this procedure to apply power to the system.
1. Verify that all connections are secure.
2. Insure that all unused DC bus bar receptacles are covered
with insulated receptacles.
3. Install the power modules only (refer
for details).
4. Turn power on.
5. Measure the bus voltages at the test jacks of the bus moni-
tor module (5 VDC and
±
15 VDC are with respect to MOD
COM; 24 VDC with respect to I/O COM). Refer to Table
for
the unloaded DC bus voltage requirements.
6. When the bus voltages are at acceptable levels, start adding
process control modules.
