2-8
Stinger® MS+ Getting Started Guide
Installing a Stinger MS+
Alarm monitoring
The alarm-relay contacts operate during loss of power, during hardware failure, or
whenever the Stinger unit is being reset, such as during its power-on self test (POST).
A normally closed (NC) or normally opened (NO) contact is used in combination
with the common (COM) contact to monitor the normally opened or normally closed
operation of the major or minor alarm relays. (See Figure 2-6.)
The gauge of the wire you use to connect to the Stinger alarm relay must be based on
the current flow of the circuit that the relay is attached to and the capacity of the
alarm relay. Because the Stinger alarm relay can carry a maximum of 2 amps, 18
AWG to 20 AWG (0.8mm² to 0.5mm²) wire is adequate.
To connect a remote alarm:
1
Locate the appropriate terminal for the alarm connection you want to make.
2
Using a 1/8-inch flathead screwdriver, loosen the screws on the Major and Minor
normally opened (NO) or normally closed (NC) and common (COM) terminals.
3
Using 18AWG to 20AWG (0.8mm² to 0.5mm²) solid or stranded wire, strip the
ends of the wire approximately 1/4 inch (6.35 mm).
4
Insert the wire leads into the appropriate positive terminal connector and its
return.
5
Using a 1/8-inch flathead screwdriver, tighten the screws on the positive and
return terminals to secure the leads.
Connecting a Stinger unit to monitor the alarm status of other devices
Revision 2 and revision 2.1 control modules have a DB-15 connector that can accept
connections to monitor the alarm status of up to seven external devices. The
connection for each external device consists of a pair of 24-gauge to 28-gauge
connectors. One connector supplies ground, and the other senses the status of the
remote alarm by applying 3.3Vdc, which draws less than 10mA of current through
the closed contacts of the alarm relay on the remote device. For the pinout
arrangement of these connectors on the DB-15 connector, see “Alarm input port
pinouts” on page B-2.
Connections from the control module
To connect to a remote device:
1
Using a male DB-15 connector, connect a 15-lead cable to the ALARM INPUT
connector of the control module. One lead is unused.
2
Run one pair of leads to the alarm connectors of each remote device to be
monitored by the Stinger unit, as shown in Figure 2-7.
