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5
RLDS -
Connecting
External Alarms
5.1. Overview
Each RLDS includes four (4) Form C, SPDT
relays. The contacts are rated .5A at 250 VAC and
1.0A at 30 VAC. These relays are used for the
connection of external alarm devices. The relays are
factory-assigned to the following conditions:
Relay #1
Relay #2
Relay #3
Relay #4
5.2. Connection
Use the AC conduit or any of the remaining
service knockouts to gain cable access to the interior
of the monitor. Locate the relay connector
(Figure 3-9) and remove it from the circuit board.
1. Secure the leads to the connector orienting
them as shown in Figure 5-1. Wire the leads to
either the N.C. or N.O. terminals of each relay,
depending on whether you want the relay to be
CLOSED or OPEN when de-energized.
2. When you are through securing the
connections, carefully plug the connector back
onto the circuit board.
Figure 5-1 - RLDS Relay Connector
22 • RLDS I&O Manual
Leak
Spill
Evacuate
Fault
NOTE: Each relay may be connected as nor-
mally open (NO), or normally closed (NC).
The relay contacts are rated .5 A at 250 VAC.
Latching / Non-Latching - refer to Section 7.7.,
Alarm Acknowledge (Ack) - Mode to select Alarm
Ack Mode.
Alarm power source - power for the alarm devices
connected to the relay contacts may be supplied from
the Auxiliary AC Power Out Connector (Figure 3-8).
Red*
Yellow*
Leak \ Spill \ Evacuate \ Fault
RELAY
Strobe or
Horn
LINE POWER
Figure 5-2 - RLDS Relay 1 and 2 Wiring
3. Jumper the Neutral of the input power
connector to the Common on the relay block.
4. Connect one end of strobe or horn to the NO of
whichever level of alarm is appropriate for
application.
5. The other end of strobe or horn is connected to
the Line of the input power connector (5 A
maximum).
*The colors correspond to
the LEDs on the front of the
case
Normal Configuration:
Strobes
are usually connected
to the Leak relay (#1)
Horns are usually connected
to the Spill relay (#2)
External Power:
AC < 250V
DC < 15W
Note: the device does not power
accessories; power must come from
an external source
026-1309 Rev 8
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