Digital Monitoring Products Inc PC0096 User Manual

The metal enclosure must be mounted in a secure, dry place to protect the panel from damage due to 

tampering or the elements.  It is not necessary to remove the PCB when installing the enclosure.  The PCB 

may be installed in the standard 340 small enclosure or in the optional 349 medium enclosure.

Enclosure  Mounting  Holes

Dual 1/2" and 3/4" Conduit Knockout

Battery Shelf

Enclosure Mounting Holes

J1111

XT30/XT50

Phone Jack

Connector

Command Processor

Reset

J16

J4

J11

1

2

3

4

Slide panel PCB into lower enclosure slots 

Panel 

PCB 

screw

Panel 

PCB 

screw

Slide panel PCB between formed metal supports

Dual 1/2" and 3/4" Conduit Knockouts

Battery  Shelf

Enclosure  Mounting  Holes

Enclosure 

Mounting 

Hole

Enclosure 

Mounting 

Hole

Phone Jack 

Connector

J4

Command Processor 

Reset

J16

J11

1

2

3

4

XT30/XT50 

Panel 

PCB 

screw

Panel 

PCB 

screw

DMP keypads have removable covers that allow the base to be mounted on a wall or other flat surface using

the screw holes provided on each corner.  
For mounting keypads on solid walls, or for applications where conduit is required, use a DMP 695 or 696

keypad conduit backbox.

Several factors determine the performance characteristics of the keypad bus: the length of wire used, the

number of devices connected, and the voltage at each device. When planning a keypad bus installation,

keep in mind the following four specifications:

1. 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.

2. On keypad bus 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. To increase the wire length or to add

devices, install an additional power supply. 

Note: 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. 

3. Maximum distance for any one bus 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.

4. Maximum voltage drop between the panel (or auxiliary power supply) and any device is 2.0 VDC. If the

voltage at any device is less than the required level, add an auxiliary power supply at the end of the 

circuit. When voltage is too low, the devices cannot operate properly.

For additional information refer to the 710 Installation Sheet (LT-0310) and or the LX-Bus/Keypad Bus Wiring

Application Note (LT-2031).