Tailgate Detection - Tailgate System with Overhead Sensors

Tailgate System w/ Overhead Sensors
Model TG-DC Components Package

The Kouba Systems Tailgate with Door Control System (TG-DC) uses 36 inch directional sensor arrays mounted to the vertical faces of the doorframe in conjunction with overhead sensor arrays to provide enhanced monitoring and pedestrian counting and access control through secured doorways. The TG-DC will integrate with any current access control systems as well as older legacy access control systems. The TG-DC communicates with the building access control system (BACS) with relay contacts. Display plates located near the card reader indicate system armed (red LED illuminated), access granted (green LED illuminated), and system in alarm (buzzer activated).

The Overhead Sensor Array detects side-by-side passages.
Directional Sensors detect tailgating.

Additionally, the sensors monitor door contact and provide local warning and alarm sounder when the door is forced open or propped open without use.

Overhead Sensor Array		Directional Sensors

The overhead sensor array detects side-by-side passages through the doorway.		The directional sensors are used to determine and verify the direction and count of the persons passing through the doorway.

Technical Specifications

Power	12 VDC @ 1 Amp
Inputs	1 normally closed fully supervised door contact. Supervision may be disabled. Not required for passageway locations. 1 valid entry card momentary (1 sec. max.) relay from card reader system, activates when a valid entry card is accepted. 1 valid exit card momentary (1 sec. max.) relay from card reader system, activates when a valid exit card is accepted. 1 Request-to-exit (REX) input relay from card reader system or directly from REX. Input monitored when door contact is monitored and the free exit dip switch is set. 1 system bypass relay from access control system activates when the tailgate system is to be bypassed. 1 count bypass momentary (1 sec. max.) relay from card reader system. This contact can be activated from the control room or from an additional keypad or reader. When this input is activated and a valid entry or exit card follows, the system will allow multiple people to pass through the tailgate and will reset after the door is closed. Count bypass is disabled when door monitoring is disabled.
Outputs	2 normally closed Tailgate Alarm Relays. (Entry and Exit alarm) 1 normally closed door Alarm Relay. Opens when door is opened without access, or when the door is held open past the door prop alarm delay. 85dB alarm sounder. Slow pulsing tone indicates warning alarm. Sounder is on during alarm. 2 green LEDs indicate access granted. (Entry and Exit) 2 red LEDs indicate armed.
Field Adjustments	Tailgate Sensitivity Adjustment - sets the sensitivity of the tailgate detection. Access Delay - adj. 0 - 20 sec. Sets the time that the door may be opened prior to the local warning alarm. Warning Delay - adj. 0 - 20 sec. Sets the time that the local warning is active prior to the door prop alarm. Alarm Automatic Reset Delay - adj. 0 - 20 sec. Sets the time that the alarm is active prior to automatic reset. Door Prop Delay - adj. 0 - 20 sec. Sets the time that the door can be held before activating the warning tone. Mode Selection: • Card In / Card Out • Card In / Free Exit • Card In / REX Exit • Door Monitoring Enabled • Door Monitoring Disabled
Mounting	Sensor Housings are attached to the door frame with self tapping screws. Contact Kouba Systems for other mounting options. The tailgate control circuit board is mounted next to the access control system card reader interface module either in an equipment box near the door, or in the equipment room where the card reader system is located. Sounder and LED Trim Plate may be mounted at the door mullion, or in a 1 gang box near the door.

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