1.2 Tracker Board Input / Output Descriptions
1.2.1 Access Control Device (Weigand) Input
Tracker boards can accept weigand input data from most devices that output their data in a 26-bit
weigand format. An access control device (a card reader for example) is connected to the tracker
board at P2, terminals 6-7-8-9. When the tracker board receives the weigand data from the access
device, it sends the data to the access system controller where the decision to grant or deny access
is made. At the same time, a report is made of this activity and is stored in the transaction buffer.
Two access control devices may be connected to a single tracker board, however each device will
report the same location in the transaction report when connected in this method and each device will
activate the same door (or gate). This may be preferable in some instances. For example, if a
vehicular gate uses both a card reader and an RF receiver for resident access, each of these devices
can be connected in parallel. Each device will activate the gate (door) that the output relay of the
tracker board is connected to, and each device will appear in the transaction report with the name
assigned to the tracker board in the software ("Main Gate", for example).
1.2.2 Gate Operator Data Input
Gate operator data inputs can only be used with DKS vehicular gate operators (see chart on page 6).
The tracker board receives data (P2, terminals 1-2-3-4-5) from the gate operator control board,
converts it to weigand format, and then sends this weigand data to the access system controller
where it is stored in the transaction buffer. The data that is sent from the gate operator control board
includes information such as gate operator cycle count (x100), if an obstruction was hit, if an attempt
was made to force the gate, etc. See the appendix for a complete listing of all gate operator
transactions. In PAMS applications, only one tracker board is required per traffic lane to monitor the
gate operator activity of the slide or swing gate operator, and the parking gate operator. The tracker
board will also monitor the 24 VAC power from the gate operator control board(s). When this power is
removed, a "power out" transaction is sent to the access system.
1.2.3 Request to Exit Input
An alarm condition will exist anytime a controlled door is opened without access being granted by the
access control system. The request to exit input (P2, terminals 8 & 18) allows the door to be opened
without activating the tracker board alarm relays, and will not cause the access system to report a
forced condition. The request to exit is typically used at a controlled access point to allow free exit to
personnel. A "Push To Open" button, or a push bar, etc., is connected to the request to exit input on
the tracker board. When this input is activated, the tracker board output relay will activate causing the
door strike or magnetic lock to release allowing the door to be opened.
1.2.4 Door Ajar Input
The door ajar input (P2, terminals 8 & 15) monitors the status of a controlled access door through a
magnetic (typical) door switch. This input tells the tracker board if the door is not fully closed, and will
cause the alarm and monitor relays on the tracker board to activate under certain conditions (see
Section 1.3).
1.2.5 Reset Alarm Input
The reset alarm input (P2, terminals 8 & 16) overrides the door ajar input allowing a door to held open
when necessary. When this input is activated, the tracker board will not activate its alarm or monitor
relays even if the door ajar input is activated. The reset alarm input is active in Mode-1 operation only
(see 1.3.1).
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