DKS 1803PC Owner's Manual download pdf (Page 9)

1.2.6 Command Relay Input

The command relay input (P2, terminals 8 & 17) is connected to the relay in the access system

controller that activates when a valid device code is received by the controller. For example, when a

card reader connected to the weigand input on the tracker board reads the card code, it inputs this

information to the tracker board, which in turn sends the information to the access system controller.

The access controller then makes the decision to grant or deny access. If access is denied, a

transaction of the denial is made and nothing else happens. If access is granted, a transaction of the

access grant is made, and the controller activates the command relay. This relay output is connected

to the tracker board system command relay input, which then causes the tracker board output relay to

activate. The output relay activation will then open the controlled door (or gate). If two or more tracker

boards are connected to the access system, only the output relay on the tracker board that sent the

data will activate. The tracker board relay strike time is set via the programming switches on the

tracker board.

1.2.7 Monitor and Alarm Relays

Activation and operation of the monitor (P1, terminals 1-2) and alarm (P1, terminals 3-4) relays is

dependent on the mode of operation (switch 1) and on the settings of switches 3 and 4 on the tracker

board (see Section 1.3). Typically, the monitor relay is connected to a local alarm (bell, buzzer, light,

etc.) and the alarm relay is connected to the buildings alarm system. These relays provide a dry

contact only.

1.2.8 Output Relay

The output relay (P1, terminals 5-6) activates on command from the access control system, or from a

request to exit input. The output relay releases the door strike (or magnetic lock) to allow entry or exit,

or activates a gate operator if the tracker board is used to control a vehicular gate.

1.2.9 Weigand Output

All data received at the weigand input terminals and the gate tracker terminals is sent to the access

control system in 26-bit weigand format from the weigand output terminals (p1, terminals 7-8-9).

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DKS 1803PC Owner's Manual Page 9