Clear-Com LMC-64 - Manual (Page 104)

Clear-Com
Eclipse Median Instruction Manual
7 - 1 8
will cause the Eclipse Median to detect an alarm condition. A logic low
or an open circuit will cause the Eclipse Median to detect no alarm
condition.
Pin 1 is a voltage source out of the Eclipse Median matrix. It is
connected through a 10KOhm pull-up resistor to the +5 V supply rail
inside the Eclipse Median matrix.
A contact closure placed across pins 1 and 6 will also cause an alarm
condition. The alarm outputs of the PSU-101 power supply could be
wired directly to these pins allowing the CPU card to report PSU
failures also.
Figure 7-10: Wiring the Alarm I/O Connector to an Alarm Relay
Connector
Figure 7-11: Eclipse Median Matrix’s Double-Pole Double-Throw Alarm
Relay
GENERAL-PURPOSE OUTPUTS CONNECTOR
(GP OUT)
The DB-25 connector labeled “GP OUT” connects the matrix to eight
double-pole double-throw (DPDT) relays with contact ratings of 30
VDC at 1A.
Each general-purpose output has a relay inside the Eclipse Median
matrix. When a general-purpose output is inactive, the associated
1
2
9
8
7
6
5
4
3
1
2
3
4
Relay Normally Closed
Relay Wiper/Common
Relay Normally Open
To Alarm
To Alarm
Eclipse
"Alarm I/O" DB-9F
Connector
PSU-101
"Alarm Relay"
Connector
ALARM_COM
RL1
RELAY DPDT
3
2
4
8
9
7
1
10
ALARM_NC
ALARM_NO
4