Installation guide

INSTALLATION
Digital Monitoring Products XR6/XR10 Installation Guide
6
4.2 Mounting Keypads
Security Command keypads have removable covers that allow you to easily mount the base to 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, 696, 775, or 776
keypad conduit backbox.
4.3 Wiring Keypads
The keypad data bus consists of a 4-wire cable that provides 12 VDC power, data in, data out, and a panel common.
You can connect keypads in parallel on one 4-wire cable or provide a separate cable run back to the panel for each
keypad.
Three 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. You can connect devices in parallel on the same cable, or provide
separate runs back to the panel.
When planning a keypad bus installation, keep in mind the following four specifications:
1. You can install individual keypads on wire runs of up to 500 feet using 22 gauge wire or up to 1,000 feet using 18
gauge wire. To increase the wire length or add additional devices, a power supply is required.
2. Maximum distance for any one keypad bus/LX-Bus circuit is 2,500 feet regardless of the gauge of wire. This
distance can be in the form of one long wire run or multiple branches totaling no more than 2,500 feet.
3. Maximum number of devices per 2,500 feet circuit is 40. (Note: The XR6 and XR10 panels allow 4 (four)
supervised keypads. Additional keypads can be added in the unsupervised mode.)
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, an auxiliary power supply must be added at the end of the circuit. The
2.0 VDC drop maximum has not been verified by UL.
Note: To troubleshoot voltage drop, read the voltage of the last device on the keypad bus.
Refer to the 710 Bus Splitter/Repeater Installation Sheet, LT-0310 (Document No. 0310 on DMP Fax) for
information concerning keypad wiring distances and capacities.
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 larger transformer for the panel is 16.5 VAC 40VA, 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. When the DMP Model 324 16.5 VAC 20VA plug-in transformer is used, the bell output current is reduced to
600mA.
The transformer must be connected to a 120 VAC 60 Hz commercial power outlet that is not controlled by a wall switch.
Never share the transformer output with any other equipment.