19 Accelaterm
®
Installation and Service Manual
Request-to-Exit (Bypass) Sensor Connection
Request-to-Exit sensors (also known as Bypass sensors) work
in conjunction with Door Status Sensors to provide complete
facility entry and exit control. The Request-to-Exit sensor
input connects to the same Accelaterm terminal strip (RDRx)
that the associated Door Status Sensor connects to (see Figure
12).
Table 10 lists the connections between the RDRx terminal
strips and the associated Request-to-Exit sensor.
Request-to-Exit Sensor Cable Requirements
Request-to-Exit sensors require a 22AWG, 2-conductor,
stranded, shielded, cable with drain wire between the Ac-
celaterm and the particular unit (see Figure 12).
Table 11 lists the cable gauge-vs.-length requirements for
proper operation of the Accelaterm and the Request-to-Exit
sensor.
DOOR CONNECTIONS
Table 10 - Connection Table for Request-to-Exit Sensor
DRx Terminal
Strip Pin #
Signal
REX Alarm Positive
RT Return Negative
Request-to-Exit
Sensor Function
Table 11 - Cable Requirements for
Request-to-Exit Sensor
Unit Distance Wire Gauge
Request-to-Exit
Sensor
(maximum)
500ft/153m
22AWG Shielded
w/drain
Figure 12 - Request-to-Exit Sensor to Accelaterm Connections. Plain (Unsupervised) Contacts, and Supervised Contacts
CAUTION
Keep all drain wires short. Connect drain wires to the ground posts located on both sides of Accelaterm
cabinet. DO NOT ground drain wires and cable shields at any other point.
Accelaterm Interface Circuit Board
Drain Wire/
Shield
PWR
GND
LED
D1
D0
DS
RT
REX
RT
PWR
GND
LED
D1
D0
DS
RT
REX
RT
Accelaterm Cabinet
Ground Post
Unsupervised Request-
to-Exit (REX) Sensor
Drain Wire/
Shield
Accelaterm Cabinet
Ground Post
Supervised Request-to-
Exit (REX) Sensor
R1=1K
R2=1K
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