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Digital Monitoring Products XRSuper6/XR20/XR40 Installation Guide

InstallatIon

4.2 Mounting Keypads

DMP keypads have removable covers that allow the base to be mounted on a wall or other at 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, 696, 775, or

776 keypad conduit backbox.

4.3 Installation Specications

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

specications:

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. All 22-gauge

wire must be connected to a power-limited circuit and jacket wrapped.

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 that is UL listed for Fire Protective Signaling, power limited,

and regulated (12 VDC nominal) with battery backup.

Note: Each panel allows a specic number of supervised keypads. Add additional keypads in the

unsupervised mode. Refer to the panel installation guide for the specic 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 710/710F Installation Sheet (LT-0310) and or the LX-Bus/Keypad Bus

Wiring Application Note (LT-2031).

Primary Power Supply

5.1 AC terminals 1 and 2

Connect the transformer wires to terminals 1 and 2 on the panel. Use no more than 70 ft. of 16 gauge, or 40

ft. of 18 gauge, wire between the transformer and the panel.

Always ground the panel before applying power to any devices: The panel must be properly grounded

before connecting any devices or applying power to the panel. Proper grounding protects against

Electrostatic Discharge (ESD) that can damage system components. See Earth ground, in the Secondary

Power Supply section.

5.2 Transformer Types

The transformer for the panel is 16.5 VAC 40 VA, which provides up to 1.5 Amps of bell output current,

500mA of auxiliary current, and 100mA of smoke detector output. You can use either the Model 320 wire-in

or 321 plug-in transformer with the panel. The total current available is limited by the total battery standby

requirements of the installation.

The transformer must be connected to a 120 VAC 60 Hz commercial power outlet that is not con trolled by a

wall switch. Never share the transformer output with any other equipment.

1234

+BAC –B

318 Battery

Harness

Panel Red and

Black Battery Cables

Red

Black

Battery

318 Battery

Harness

Red

Black

BELL GND

To AC

14 AWG to

Earth Ground

XRSuper6/XR20/XR40

Command Processor

Panel

PTC

To Bell

Circuit

Figure 4: Wiring Multiple Batteries

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 30 31

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