Install The Keypad; Wiring Specifications For Keypad Bus - DMP Electronics THINLINE Series Installation Manual

INSTALL THE KEYPAD

All DMP keypad housings are designed to install on any 4" square box, 3-gang switch box,
DMP 695 and 696 back-box, or flat surface.

Wiring Specifications for Keypad Bus

When planning a keypad bus installation, keep in mind the following specifications:
• DMP recommends using 18 or 22–gauge unshielded wire for all keypad circuits.
Do not use twisted pair or shielded wire for keypad bus data circuits. To maintain
auxiliary power integrity when using 22–gauge wire, do not exceed 500 feet. When
using 18–gauge wire, do not exceed 1,000 feet. Install an additional power supply
to increase the wire length or add devices.
• Maximum distance for any one circuit (length of wire) is 2,500 feet regardless of
the wire gauge. This distance can be in the form of one long wire run or multiple
branches with all wiring totaling no more than 2,500 feet. As wire distance from
the panel increases, DC voltage on the wire decreases.
• Maximum number of devices per 2,500 feet circuit is 40.
Each panel allows a specific number of supervised keypads. Add additional
keypads in the unsupervised mode. Refer to the panel installation guide for the
specific number of supervised keypads allowed.
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