PL-C1050-BLR (Modulating Boiler)
INT Port: Incoming RS485
Network communication (Modbus)
NET Port: Incoming RS485
Network communication (Modbus)
External dry contact for proof of pump
Supply water temperature sensor (10K thermistor)
Common for all the inputs
Return water temperature sensor (10K thermistor)
Outside air temperature sensor (10K thermistor)
Output 5 - Modulating Boiler
(Analog 0-10 / 2-10 / 0-5 VDC)
Output 4 - Backup Boiler Stage
(Digital - ON/OFF)
Output 3 - Modulating Boiler Enable Signal
(Digital - ON/OFF)
Output 2 - Pump 2 Action
(Digital - ON/OFF)
Output 1 - Pump 1 Action
(Digital - ON/OFF)
Power source of the controller
24 VAC
DO1
DO2
DO3
DO4
AO
DO124V DO2 DO3 DO4 AO HBEAT STAT
NETREC NETSND INTREC INTSND
UI1
UI2
COM
UI3
DI
-
24VAC
COM
INT
+
B
NET
A
RS485
NET
RS485
INT
4-12
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