-
15
-
ALARM RELAY CONNECTIONS
Figure - 11
Alarm Relay Contacts and EPO Input Terminals
Relay
Function
RL1
Load is connected to alternate input source
RL2
Preferred source indicator relay
RL3
Output Inhibit relay
RL4
Summary alarm relay
RL5
Manual or static transfer relay
RL6
S1 backfeed trip ( 1 second active)
RL7
S2 backfeed trip ( 1 second active)
EPO input is NO type interface (normally open) ,if EPO input terminals shorted to each other STS applies EPO
shutdown procedure.
EXTERNAL EPO BUTTON
figure – 12
Epo input connection
Epo input trips short circuit there is no need to lock EPO signal externally.
Summary of Contents for InfoSTS
Page 45: ...44 Figure 28...
Page 47: ...NOTES...