Table of Contents
Advertisement
CHAPTER 5: POWERING UP THE D400
System fail alarm
To connect the
System Fail relay
D400 SUBSTATION GATEWAY USER'S MANUAL
The D400 includes a System Fail contact closure to provide an external indication of
system status. The System Fail alarm is also indicated by the CPU Ready LED on the front
panel of the main module turning off.
The indicator or audible alarm can be wired to operate as follows:
•
ON when system failure has occurred
•
ON when system is functioning properly
The System Fail contact closure provides three contacts (terminals 4, 5 and 6) on terminal
block TB2.
Contact closure rated for 0.1 A @ 300 V maximum.
1.
Remove the terminal block protective plastic cover.
2.
Wire a lamp to terminals 4, 5 and 6 on terminal block TB2 as follows:
To enable the indicator when system is...
Failed
Functioning properly
For proper connection, the recommended tool torque settings for power terminal
screws are 10.8 in-lb [1.22 Nm].
3.
Replace the terminal block protective plastic cover.
Figure 50: System Fail Alarm Connection
TB2
Station Battery / Power Source
Wire the lamp between...
Terminals 4 and 5
Terminals 5 and 6
Power
Fail
Light ON
after failure
when operational
GENERAL
POWER SUPPLY ALARMS
System
Fail
Light ON
81
Advertisement
Table of Contents
