Chamberlain SENTEX INFINITY Installation Instructions Manual page 13

CONNECT REMOTE KEYPADS/KEYPAD LIGHTS
The system may have up to two remote keypads attached.
Keypads require a 7-conductor, 20-24 AWG, shielded cable.
• In "L," "S," or "DI" systems the main keypad is built into the unit
faceplate and the auxiliary keypad is remote from the system.
• In "B" system, both keypads are remote from the system.
All remote keypads must be within 500' of the system. The
required cabling and connections for each element of the keypad
assembly is shown below. If you do not have the optional lighted
housing, ignore the section on lights.
NOTE: Run cables in metal conduit and ground the conduit as
described in the Installation Tips. Do not run any other wires in
the conduit. Do not use PVC conduit.
1. Plug the keypad cable into J1 on the keypad board from either
direction. Connect the free wires to TB1 on the terminal board,
noting the color for each position. Do not connect the shield.
2. On the main circuit board, connect the keypad cable wires
using the same color scheme as in the keypad housing. TB14 is
for "Remote Keypad A" (used only on "B" series systems) and
TB15 is for "Remote Keypad B." Remote Keypad A activates
relay 1. Remote Keypad B activates relay 2. Connect the cable
shield to the ground screw shown on page 8 or 9. Lights
require a 2-conductor, unshielded cable. Use 18 AWG wire for
distances up to 500' and 16 AWG for longer runs. Do not run
lighting wires and keypad cable in the same conduit.
3. Wire the two lamps in parallel and connect to the unshielded
pair.
4. Connect the pair to the 12 Vac power on TB1 of the unit's main
board. If you must connect multiple cables to TB1, wire nut the
conductors together off the board and connect a single 18 AWG
wire to TB1. Repeat for the other conductor from each cable.
A D D I T I O N A L F E A T U R E S
13