SharpEye 20/20MPI, User And Maintenance Manual

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TM 20/20MPI, Rev (5) April 2017
Troubleshooting 51
8.5.2 False Alarm or Warning Indication
➣ To identify the false alarm or warning indication:
1
Disconnect the power supply from the system and check the internal
wiring.
2
Reconnect the power supply and wait approximately 60 seconds. If the
indication remains, the unit requires service.
8.5.3 RS-485 Communications Network
Using the RS-485 network capability of the IR3 detector and control
software, you can connect up to 32 detectors in an addressable system with
only 4 wires (2 for power and 2 for communication). Using repeaters, the
number of detectors can be much larger (32 detectors for each repeater) up
to 247 on the same 4 wires. When using the RS-485 network, you can read
each detector status (FAULT, WARNING, ALARM) and to initiate a BIT for
each detector individually.
For more details, contact SPECTREX.
www.acornfiresecurity.com
www.acornfiresecurity.com