INTRODUCTION
I-E96-508C
4 - 1
SECTION 4 - OPERATING PROCEDURES
INTRODUCTION
This section covers what must be known to operate the modu-
lar power system. The first part of this section provides a
step-by-step approach to start-up. The remainder of this sec-
tion explains the faceplate LED on the DC transfer, bus moni-
tor and power modules, and other general operating
information.
NOTE:
The modular power system requires no user calibration; all
components are factory calibrated.
LED INDICATORS
When the modular power system is operating, observe the sta-
tus LEDs. The following paragraphs explain how to interpret
these LEDs. Also, refer to Table
DC Transfer Module
The DC transfer module (DTM) has three LEDs, module status,
line one and line two. All LEDs are red and green. When the
system is receiving power and operating normally, the module
status LED is green, as are the line one and two status LEDs.
The only time the module status LED turns red is if the module
fails. A failure means that the internally generated supply volt-
ages or references have fallen below the minimum acceptable
level. In a redundant supply line configuration, a failure in the
primary input turns line one LED red; a failure in the second-
ary input turns line two LED red.
Table 4-1. LED Conditions
Module
LED/Color
Condition
DTM
Status - Green
Red
Normal
Module has failed
Line 1 - Green
Red
Line 1 input is good
Line 1 input has failed or is out of tolerance
Line 2 - Green
Red
Line 2 input is good
Line 2 input has failed or is out of tolerance
BMM
Status - Green
Red
Normal
Module has failed
System -Green
Status - Red
Normal
Bad power system status
PDS/PDF
Status - Green
Blinking Green
Red
Normal
5 VDC or 24 VDC overload
15 VDC overload, failure or over temperature
