Tunnel Master® wbc Installation Guide
Page 49
Entrance Keypad Comm Cable
Electrician must run a single-twisted pair, 24 AWG shielded comm cable (can be purchased
from ICS) through 3/4” conduit from the Tunnel Master® wbc 485 terminal to the entrance
keypad.
There is a terminal block (NETWORK 485), located on the keypad circuit board labeled with
DT+, DT-, for Data+, Data-, respectfully. Terminations for the single-twisted pair Comm wires
torqued to 4.42 in. lbs to 5.31 in. lbs (.5 - .6 Nm).
Also, the Drain Shield terminates on the Ground Lug.
CAUTION: Over torquing may cause enclosure breakage.
Entrance Keypad Communication cable terminations must be made as shown in Figure 42.
ICS SUPPLIED
24/4 COMM CABLE
Tunnel Master® wbc Main CPU Terminations
485 COMM Terminal
TX +
RX -
GND
Two 485 COMM Tiers Located
on the
Tunnel Master® wbc
Main CPU Board
TX -
RX +
JUMPER SETTINGS
J1 – Ext Prog
J2 – A15
ON
J3 – EPCE
1&2
J4 – Gnd
ON
J5 – Rec+
OFF
J6 – Rec-
OFF
J7 – Term
ON
Entrance Controller
Keypad
D
T-
GND
D
T+
D
T-
GND
D
T+
WHITE
WHITE / BLACK
W
H
IT
E
W
H
IT
E /
B
LA
CK
SHIELD
DRAIN
Tunnel Master® wbc
Ground Lug
Entrance Controller Keypad
Ground Lug
SHIELD
DR
A
IN
Figure 43. Main CPU Board RS-485 Comm Terminal Wiring
