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