Prolon M2000 SERIES Quick Start Manuals page 13

Bottom row:
common for all inputs
CO2 (4-20mA) / Building pressure (0-5VDC)
Zone temperature (10K thermistor)
Outside temperature (10K thermistor)
Supply temperature (10K thermistor)
Manual reset
Proof of san
Proof outside air damper open
Proof exhaust 2 / Manual override
Proof exhaust 1
NET Port: Incoming RS485 network
communication (Modbus)
Controller's power source
(24VAC - Class 2)
cULus Listed; UL 916 Energy Management Equipment, File E364757, Vol.1
13
REV.2.0 / PL-QCK-M2000-EN