Chamberlain BG 3000-B3 User Manual download pdf (Page 9)

Rev E Doc 01-20201 6 of 33

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.

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).

STREET

COMPLEX

Gate

Operator

Master

Gate

Operator

Slave

Inside Interrupt

Loop

Shadow Loop

(swing gate only)

Outside Interrupt

Loop

Inside Interrupt

Loop

Outside Interrupt

Loop

ADDITIONAL

INPUTS:

Radio

Cycle

Interrupt Bar

Photo-Sensors

Fire

MagLock

Manual Inputs

ADDTIONAL

INPUTS:

Radio

Cycle

Interrupt Bar

Photo-Sensors

Fire

MagLock

Manual Inputs

1384F4

Master/

Slave

Cable

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Chamberlain BG 3000-B3 User Manual Page 9

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