10
MKT-0262 MPC-1748 Rev 02/13
Advanced Pressure Monitor II Rough-In Installation
Wiring
1.5.5 Relay and Annunciator Output, Labeled RELAY
There is an SPDT dry contact available. When an alarm occurs the Normally Open (NO) and the Common
(COM) internal contacts will be closed. During no alarm conditions the Normally Closed (NC) and COM are
shorted.
This relay can also drive a Remote Annunciator.
1.5.6 Optional Remote Annunciator Wiring
In the figure below, the Remote Annunciator connector is at left, and the APM2 connector is at right.
Figure 1-8.
Remote Annunciator Wiring Diagram
•
To c15 Vdc power, connect the +15 Vdc from the relay connector to +15 Vdc, A1 at the Remote
Annunciator. This supplies 15 V exc. to the Remote Annunciator for powering the circuit during normal
conditions.
•
To connect power return, connect the COM of relay connector to Ground, A2 at the Remote Annuncia-
tor.
•
On of the relay connector, connect a short jumper between the +15 and relay connector. This will connect
the internal 15V supply to the common of the internal alarm relay.
•
Connect the NO on the relay output to the +15 Vdc Trigger, A3 terminal on the Remote Annunciator.
When an alarm occurs and after the programmed alarm delay times out, the internal relay will supply 15 V to
the Remote Annunciator circuit to actuate the audible buzzer and the red LED.