XR150FC/XR550FC Series Installation Guide
Digital Monitoring Products
13
Bell Output
Terminals 5 and 6
Supplies positive 12 VDC to power alarm bells or horns. This output can be steady, pulsed, or temporal, depending on
the Bell Action specified in Bell Options. Terminal 6 is the ground reference for the bell circuit. This supervised output
reads resistance of 1k Ohms or less as normal. The indicating appliance can supply this resistance. If using a horn or siren,
install the included 1k Ohm 0.5 W resistor across the bell circuit to provide supervision. See the Notification Appliance
section in the Compliance Listing Guide (LT‑1330) for wiring diagrams and a list of approved notification appliances.
Keypad Bus
Description
The panel Keypad Bus includes Terminals 7, 8, 9, and 10. You can connect up to fifteen supervised keypads and multiple
unsupervised keypads to the panel. In addition to DMP keypads, you can also connect any combination of zone
expansion modules. Refer to the specific device installation sheet for the maximum number of Keypad Bus devices. Refer
to the LX‑Bus section for more information about LX‑Bus expansion.
Terminal 7 ‑ RED
Supplies positive and regulated 12 VDC to power DMP LCD keypads and zone expansion modules. Terminal 7 also
supplies power for any auxiliary device. The ground reference for Terminal 7 is Terminal 10.
The output current is shared with the smoke power output on Terminal 11 and zones 9 and 10. Current draw for all
connected devices must not exceed the panel maximum current rating. See Power Supply in the Compliance Listing
Guide (LT‑1330) for maximum current in a fire listed application.
Terminal 8 ‑ YELLOW
Receives data from keypads and zone expansion modules. It cannot be used for any other purpose.
Terminal 9 ‑ GREEN
Transmits data to keypads and zone expansion modules. It cannot be used for any other purpose.
Terminal 10 ‑ BLACK
The ground reference for DMP keypads, zone expansion modules, and all auxiliary devices being powered by Terminal 7.
Programming (PROG) Connection
A 4‑pin PROG header is provided to connect a keypad when using a DMP Model 330 Programming Cable. This provides
a quick connection for panel programming. You may also use the PROG Header to connect Keypad Bus devices.
OVC LEDs
The Overcurrent LED (OVC) lights red when the devices connected to the Keypad Bus and LX‑Bus draw current that
exceeds the panel rating. The OVC LED is located to the left of the 893A connector on the panels.
XR150FC/XR550FC Series panels have an additional OVC LED to the right of the CELL MODULE connector. The LEDs
turn a steady red when lit. When the OVC LEDs light red, the LX‑Buses and Keypad Bus are shut down.
Smoke and Glassbreak Detector Output
Terminals 11 and 12
Supplies positive and regulated 12 VDC to power 4‑wire smoke detectors and other powered devices. This output can
be turned off by the user for 5 seconds using the Sensor Reset User Menu option to allow latched devices to reset.
Terminal 12 is the ground reference for Terminal 11.
Current Rating
The Output current from Terminal 11 is shared with Terminals 7, 25, and 27.
The total current draw of all devices powered from the panel must be included with Terminal 11 calculations and must not
exceed the maximum output rating.
