What are the power requirements for a DSC Impassa?
Measuring panel voltage is a common troubleshooting step when experiencing odd behavior on a panel. Most often, this step is required when there is a Modem-Panel Comm message, or the panel is not communicating properly with Alarm.com. For more information about measuring the voltage, see Measure panel and module voltage.
Power requirements
The DSC Impassa panel has a 16.5V power supply. Voltage outside of 16-18V range could cause modem-panel communication trouble.
The following table displays where to test voltage and what the recommended voltage is for the DSC Impassa:
| Panel power requirements | 16 VAC |
|---|---|
| Battery power requirements | 12.0-12.5 VDC |
| Where to measure panel voltage | The two AC terminals on the main panel board |
| Alarm.com module power requirements | 3.9 VDC |
| Where to measure module voltage | The module is powered by the link ribbon inside the panel, therefore an accurate reading of the module itself cannot be retrieved. It is recommended to just test the panel for voltage. |
Wire size and maximum length
For wire size and maximum length specifications, please refer to the manufacturer.