Sams - Chamberlain LiftMaster Professional SW420 Manual

S A M S ( S E Q U E N C E D A C C E S S M A N A G E M E N T S Y S T E M )
SAMS DEFINITION
The Sequenced Access Management System or SAMS allows the customer more control when managing vehicular entrances to areas such as
apartment complexes, businesses and gated communities. The basic concept of the system is that traffic is controlled by two gates installed in
tandem, a fast moving gate such as a barrier gate operator and a slower moving more secure or ornamental gate such as a single or pair of
slide/swing gate operator. The design of this gate system balances the demands of speed during high traffic periods with security during low traffic
periods. Barrier gates typically have the fastest open times of the many gate operator types and the slide or swing gates allow you to effectively
seal off the perimeter of the complex you are planning to secure.
NOTE: Connect all entry devices to the slide or swing gate. If using a device, such as a 7-day timer, to latch the slide or swing gate open during
high traffic times, connect the device's N/O relay output to the GL board's Interrupt Loop input. Once the device activates the Interrupt Loop input,
the next vehicle to access the SAMS system will lock the gate in the open position until the device deactivates. When the device deactivates, the
timer to close will automatically close and secure the gate.
SAMS OPERATION
1) When an authorized vehicle accesses the gate system, the SAM
system responds by first opening the gate farthest from the vehicle,
the swing or slide gate.
2) Once the swing or slide gate is open, the barrier gate begins its
open cycle.
3) Once the barrier is open the vehicle may pass through the SAM
system. At this point you have two options in how you would like to
initiate the SAM systems closure. You may chose to:
a) Use a timer to close system to automatically close the barrier gate
after a preset amount of time or
b) Use a loop system to close the barrier gate after the vehicle has
passed through the SAM system.
4) Once the barrier gate is closed the slide or swing gate will activate
its internal timer to close and begin closing.
5) If another authorized vehicle accesses the SAM system before the
slide or swing begins to close the barrier will open and allow the
vehicle to pass through the SAM system.
6) If another authorized vehicle accesses the SAM system during the
slide or swing gates closing cycle the SAM system will reopen the
slide or swing gate. Once the slide or swing gate reaches the open
position the barrier will then open to allow the vehicle to pass
through the SAM system.
7) If no other authorized vehicles access the SAM system the swing or
slide gate will close followed by the barrier.
Figure 1

SAMS

Conduit
TRAFFIC
STREET
BG770
Second
Unit
Photo eye for
open cycle
SAMS WIRING
1) Install conduit between the BG770 and the SW420 for SAMS control
wiring.
2) Run a 4-conductor cable in the conduit between the BG770 SW420.
3) Locate the SAMS relay terminals (J5) on the GL board in the SW420
and locate the auxiliary limit switch in the BG770.
4) Attach a wire from the SAMS relay terminal (J5) on the GL board to
terminal 1 on the BG770 terminal strip.
5) Attach a wire from the SAMS relay terminal (J5) on the GL board to
terminal 3 on the BG770 barrier gates terminal strip.
6) Attach a wire from terminal J1-5 on the GL board to the common
(COM) on the auxiliary limit switch in the barrier gate.
7) Attach a wire from terminal J1-8 on the GL board to the normally
open (NO) on the auxiliary limit switch.
8) Test for correct functionality of the SAM system.
Field Wiring Terminals
Interrupt Loop Input
TB5
TB8
SAMS Relay At J5
N/O
COM
BG770
Photo eye for
open cycle
Shadow
8'
Loop
Typical
COMPLEX
4'
Typical
PARKING LOT
18
BG770 Barrier Gate
Auxiliary Limit Switch
N/O
COM
Terminal Strip
1 (OPEN)
3 (COMMON)
Master Unit
OR