Digital Monitoring Products, Inc. | Troubleshooting Guide 5
MAXIMUM AUXILIARY POWER OUTPUTS
All DMP panels provide 12 VDC of auxiliary power for system accessories, such as keypads, zone expanders, supervision
modules, and intrusion detectors�
XR150 and XR550: 1500 mA (1�5 A)
XT30 and XT50: 500 mA (0�5 A)
Each device consumes a portion of the panel’s available auxiliary power� When the auxiliary power demand is too great,
the panel shuts down the auxiliary power circuit� That means that anything powered by the panel is now dead� To take
some of the load o of the panel, an auxiliary power supply can be used�
WIRING AN AUXILIARY POWER SUPPLY
The Sensor Reset Output can be used to reset 2-wire smoke detectors (wired to Model 715 zone expanders) by dropping
power to the bus for five seconds when a Sensor Reset is performed�
If that isn’t necessary, then the positive voltage may go directly from the power supply to the devices on the bus�
Note: Always be sure that the negative side of the auxiliary power supply is connected to the black wire of
the bus you are using it on�
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