DCM Trigger Outputs

If you choose to connect the supervision inputs, make sure that you enable the corresponding relay’s voltage supervision.

The DCM provides two trigger outputs (15mA, 15VDC, open collector, sink to ground). Each trigger contains a 680 ohm series resistor. A trigger is considered “ON” when its output transistor is turned on, allowing current (up to 15mA) to flow into the trigger output pin from a higher potential.

Normally, triggers are configured as part of an access point, as pre-alarm triggers. Pre-alarm triggers can operate a sounder or LED to indicate to a user that a door is being held open too long and, unless the door is closed, the access point will go into alarm. The pre-alarm trigger is also turned on when an access point is in an alarm state. If it is desired that the trigger control a loud sounder that requires more than 15 mA to operate, the trigger can be used to energize a separate relay that in turn will control the sounder.

Triggers can be configured in three different ways:

•Controlled - The system or a user can command the trigger on or off.

•One-Shot - When commanded by the system or a user, the trigger turns on or off for a specified number of seconds, then de-energizes.

•Repeating - When commanded by the system or a user, the trigger turns on for a specified number of seconds, then turns off for a specified number of seconds. This cycle is then repeated, also for a specified period of time or repeated indefinitely until commanded to stop.

DCM Zone Inputs

The DCM provides four zone inputs. Each zone is capable of a supervised (3-state) or unsupervised (2-state) configuration. Normally, zones are configured as part of an access point to provide Door Status Monitoring or Request-To-Exit inputs.

DCM zone inputs can be configured in one of four ways:

•Normally Open

•Normally Closed

•EOLR (End of Line Resistor) Normally Open

•EOLR (End of Line Resistor) Normally Closed

(EOLR zones require Ademco’s standard 2K ohm end of line resistors)

The following table details the various configuration options for DCM zone inputs:

Zone States

TWO STATE ZONE

THREE STATE ZONE

(unsupervised)

(EOLR

supervised)

Normal

Normally

Sensor State

Open (N.O.)

Closed (N.C.)

Open (N.O.)

Closed (N.C.)

FAULT

NORMAL

FAULT

TROUBLE

(short)

NORMAL

infinite

NORMAL

FAULT

TROUBLE

FAULT

(open)

Sensor

Connections

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