3. TRAP GATE DETAILS

The Trap gate is typically used in secured sites for screening incoming and/or outgoing traffic. In the Trap configuration, only one gate opens at a time, “trapping” the vehicle between gates. Due to ease of use, Slide Gates are the most popular for the Trap configuration. The Trap configuration can consist of any LiftMaster model for the Master, and a model SL 1000-B3 (slide gate), or BG 3000-B3 (barrier gate) for the Slave. NOTE: The SW 2000-B3 (swing gate) may not be used for the Slave gate.

ADDITIONAL

INPUTS:

Radio

Cycle

Interrupt Bar

Photo-Sensors

Fire

MagLock

Manual Inputs

Gate

Operator

Master

Master/

Slave

Cable

ADDTIONAL

INPUTS:

Radio

Cycle

Interrupt Bar

Photo-Sensors

Fire

MagLock

Manual Inputs

Gate

Operator

Slave

COMPLEX

Inside Interrupt

Loop

Shadow Loop

(swing gate only)

Outside Interrupt

Loop

Inside Interrupt

Loop

Outside Interrupt

Loop

STREET

 

1384F4

Figure 4. Typical Trap Gate Installation.

HOW IT WORKS

•In normal operation, one gate must completely close before the other opens, so only one gate is open at a time. As soon as one gate closes, the second gate automatically opens. If the second gate does not open within 10 seconds, the first gate reopens to let the vehicle exit the trap area.

•ATG (Anti-Tailgate) is always active for both Master and Slave units. Each gate closes as soon as its Inside Interrupt loop clears.

•Faults and Manual Input Commands in one unit affect both units.

•A continuous FIRE or Manual OPEN input in either unit opens the gates and holds them open.

•If a vehicle stalls between the gates and they close, they can be opened by a CYCLE or RADIO command, or by driving over the Slave unit Inside Interrupt Loop (gate to SLIDE or BARRIER only).

Rev E

Doc 01-20201

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