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TUNNEL MASTER JR MANUAL

System Hardware 26

The Entrance Keypad Installation

Second Entrance Keypad Wiring

• There is a terminal block (NETWORK 485), located on each of the keypad circuit

boards labeled with DT+, DT-, and GND, for Data+, Data- and Ground, respectfully.

Terminations for the single-twisted pair COM wires should be torqued to 20 pound-

inches (2.3 n-m.) Overtorquing may cause enclosure breakage.

• Com cable terminations must be made as follows:

First Entrance Keypad Second Entrance Keypad

(Either connector) (Either connector)

DT+ DT+

DT- DT-

GND GND

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