Description Connector/
channel
Terminal Board Remarks
Contact 1: Start/stop J4/CH 8 32-33 NRCP2-BASE Used with the remote operating mode (Remote).
Contact 2: Heating/cooling selection J4/CH 9 63-64 NRCP2-BASE Used with the remote operating mode (Remote) in accordance with the boiler or
heat pump configuration
Contact 3: Demand limit selection 1 J4/CH 10 73-74 NRCP2-BASE
Customer safety loop input J4/CH 11A 34-35 NRCP2-BASE
Contact 3 bis: Demand limit selection 2 J5/CH 12 NRCP2-BASE Unit without NRCP2-SLAVE board.
Setpoint selection J5/CH 13 NRCP2-BASE Used with the remote operating mode (Remote), unit without NRCP2-SLAVE board.
Desuperheater contact J5/CH14 NRCP2-BASE Used on units with desuperheater
Heat exchanger heater command J2B/CH 21 NRCP2-BASE Frost protection, when the unit is stopped.
Command, water pump 1 J2B/CH 22 NRCP2-BASE
Command, water pump 2 J2B/CH 23 NRCP2-BASE The change-over between the two pumps is configurable
Alarm relay output J3/CH 24 30A-31A NRCP2-BASE
Unit operation relay output J3/CH 25 37-38 NRCP2-BASE
Network connection J12 NRCP2-BASE RS-485 series connection
- Pin 1: signal +
- Pin 2: ground
- Pin 3: signal -
Setpoint selection J4/CH 8 65-66 NRCP2-SLAVE Used with the remote operating mode (Remote), unit with NRCP2-SLAVE board.
Contact 3 bis: Demand limit selection 2 J4/CH 10 75-76 NRCP2-SLAVE Used with the remote operating mode (Remote), use of NRCP2-SLAVE board,
depending on the size
Relay output for boiler command J3/CH 25 NRCP2-SLAVE Use of NRCP2-SLAVE board, depending on the size
Triac output for boiler command J2B/CH 20 NRCP2-BASE Cooling only unit without NRCP2-SLAVE board
Triac output for boiler command J3/CH 5 PD-AUX Heat pump unit without NRCP2-SLAVE board
The following table summarises the connections at the user terminal block.
NRCP2-BASE control board Optional PD-AUX board
J2A
J2B
J3
J4
J12
J3
3 - HARDWARE DESCRIPTION
3.6 - Connections at the user terminal block
3.6.1 - General description
The contacts below are available at the user terminal block on
the NRCP2-BASE boards. Some contacts can only be used if
the unit operates in remote operating type (Remote).
EREBA ACCESS EN - 4
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