Tunnel Master® Jr. User Manual
- Page 26
Chapter 3: Entrance Keypad Installation
Second Entrance Keypad Wiring
One - 3/4” approved conduit must be run between the first and second Keypads. Conduit
should originate from the bottom of the first keypad enclosure to the bottom of the second
keypad enclosure. All conduits shall be properly connected and securely fastened to the boxes
with Listed conduit hubs, and should be tightened to the torque specs of the manufacturer.
The conduit shall be secured with a Listed watertight conduit hub, and should be tightened to
the torque specs of the manufacturer. Over torquing may cause enclosure breakage.
The conduit will contain the 12 VAC and Communications cable and should enter the opening
in the bottom of the keypad enclosure.
Electrician must run 3 - 18 AWG wires, or cable (supplied by customer) through the 3/4”
conduit from the first Entrance Keypad to the second Entrance Keypad.
There are terminal blocks (POWER), located on each of the keypad circuit boards labeled with
ACH
(Line),
ACN
(neutral), and
GND
(Ground). Terminations for the 3 – 16 AWG wires should
be torqued to 20 inch pounds (in-lb) (2.3 n-m.) Over torquing may cause enclosure breakage.
First Entrance Keypad
Second Entrance Keypad
ACH
ACH
ACN
ACN
GND
GND
Electrician must run a single-twisted pair, 12 AWG shielded Comm cable (can be purchased
from ICS) through the above 3/4” conduit from the first Entrance Keypad to the second
Entrance Keypad.
There is a terminal block (NETWORK 485), located on each of the keypad circuit boards labeled
with
DT+
(Data+),
DT-
(Data-), and
GND
(Ground). Terminations for the single-twisted pair
Comm wires should be torqued to 20 pound inches (2.3 n-m.) Over torquing may cause
enclosure breakage.
Comm cable terminations must be made as in Table 3-2.
First Entrance Keypad
(Either Connector)
Second Entrance Keypad
(Either Connector)
DT+
DT+
DT-
DT-
GND
GND
Table 3-1.
120 V AC Terminations
Table 3-3.
Comm Cable Terminations
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