Condair Nortec EL
Condair
Electrode steam humidifier: status, demand, setpoints, valves and operating hours over Modbus RTU.
Overview
Key readings
- Operating status per unit
- System demand A and B
- Input and limiter signals
- Safety loop, blower pack and fan
- Main contactor, inlet and drain valves
- Operating hours per cylinder
Available commands
- Remote disable
- Manual capacity limit per cylinder
- Humidity setpoints per channel
- Digital RH or demand via Modbus
- P-band, I-time and damp time
Use cases
- Alert when Status A changes to Warning or Fault so a technician knows the humidifier needs attention.
- Watch Safety Loop A and Blower Pack A to see why the humidifier does not produce steam.
- Track Operating Hours A and B to plan cylinder replacement.
- Write Digital RH Demand A1 from the building controller and compare it with System Demand A.
Installation
- 1Connect the 3-pole Modbus plug on the main processor card to the RS485 port of your ModbusCloud Gateway; set jumper J4 at the end of the bus.
- 2On the display open Menu, enter 0335, go to Configuration, Comms. and switch Modbus on; keep address 10, even parity and 9600 baud or note your values.
- 3In ModbusCloud, add a Modbus device (RTU) with the same address and serial settings, then import this template.
- 4Check the link: Status A should match the display, for example 1 = Standby when there is no demand.
Things to watch for
- The Nortec EL does not answer on the RS485 bus.
- Modbus is off by default. Switch it on under Configuration, Comms., then check address, parity and baud rate (default 10, even, 9600) and the wiring of the 3-pole plug. Set jumper J4 only at the end of the bus.
- Writing the setpoint or demand has no effect.
- The humidifier uses a hardwired control signal by default. Set Source to Modbus under Configuration, Control Settings, and choose the control mode Demand, RH P or RH PI that matches the register you write.
- Operating hours show strange values.
- Operating Hours A and B are floats over two registers with word order CD AB. Read both registers at once and keep the byte order CDAB from the template.
- Why do the B registers read 0 on my unit?
- Unit B exists only on the two-cylinder Nortec EL-150 and EL-200. On single-cylinder models the B registers for enable input, signals, demand, valves and operating hours stay at 0 and can be removed from the device.
Registers (43)
43 read / 19 write
| Name | Address | Function | Type | Unit | Access |
|---|---|---|---|---|---|
| Remote Disable | ••• | ••• | ••• | R/W | |
| Manual Capacity A | ••• | ••• | ••• | % | R/W |
| Setpoint Channel A1 | ••• | ••• | ••• | % | R/W |
| Setpoint Channel A2 | ••• | ••• | ••• | % | R/W |
| Digital RH Demand A1 | ••• | ••• | ••• | % | R/W |
| Digital RH Demand A2 | ••• | ••• | ••• | % | R/W |
| Manual Capacity B | ••• | ••• | ••• | % | R/W |
| Setpoint Channel B1 | ••• | ••• | ••• | % | R/W |
| Setpoint Channel B2 | ••• | ••• | ••• | % | R/W |
| Digital RH Demand B1 | ••• | ••• | ••• | % | R/W |
| Digital RH Demand B2 | ••• | ••• | ••• | % | R/W |
| P-Band Channel A1 | ••• | ••• | ••• | % | R/W |
| P-Band Channel A2 | ••• | ••• | ••• | % | R/W |
| P-Band Channel B1 | ••• | ••• | ••• | % | R/W |
| P-Band Channel B2 | ••• | ••• | ••• | % | R/W |
| I-Time Channel A1 | ••• | ••• | ••• | min | R/W |
| Damp Time Channel A2 | ••• | ••• | ••• | s | R/W |
| I-Time Channel B1 | ••• | ••• | ••• | min | R/W |
| Damp Time Channel B2 | ••• | ••• | ••• | s | R/W |
| Enable Input A | ••• | ••• | ••• | R | |
| Input Signal Channel A1 | ••• | ••• | ••• | % | R |
| Limiter Signal Channel A2 | ••• | ••• | ••• | % | R |
| System Demand A | ••• | ••• | ••• | % | R |
| Safety Loop A | ••• | ••• | ••• | R | |
| Blower Pack A | ••• | ••• | ••• | R | |
| Fan Activate A | ••• | ••• | ••• | R | |
| Operating Hours A | ••• | ••• | ••• | h | R |
| Enable Input B | ••• | ••• | ••• | R | |
| Input Signal Channel B1 | ••• | ••• | ••• | % | R |
| Limiter Signal Channel B2 | ••• | ••• | ••• | % | R |
| System Demand B | ••• | ••• | ••• | % | R |
| Safety Loop B | ••• | ••• | ••• | R | |
| Blower Pack B | ••• | ••• | ••• | R | |
| Fan Activate B | ••• | ••• | ••• | R | |
| Operating Hours B | ••• | ••• | ••• | h | R |
| Status A | ••• | ••• | ••• | R | |
| Service Status B | ••• | ••• | ••• | R | |
| Main Contactor A | ••• | ••• | ••• | R | |
| Main Contactor B | ••• | ••• | ••• | R | |
| Inlet Valve A | ••• | ••• | ••• | R | |
| Inlet Valve B | ••• | ••• | ••• | R | |
| Drain Valve A | ••• | ••• | ••• | R | |
| Drain Valve B | ••• | ••• | ••• | R |
Loading registers…
Read the Condair Nortec EL remotely
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