Category
Proxima Room & Zone Control Units
Control heating, cooling and ventilation room by room or zone by zone with Produal Proxima control units.
Proxima control units handle rooms and zones that need more than a simple thermostat: several valves, a 6-way valve, or a BACnet BMS. The Produal Proxima CU supports Modbus RTU, Modbus TCP, BACnet MS/TP and BACnet IP and can control two rooms, while the CU-LH-MOD offers Modbus RTU on the Produal PUMP platform.
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Selection guide
Proxima Room & Zone Control Units Guide
What a Proxima control unit does
It reads its inputs (temperature sensors, CO2 or humidity transmitters, contacts), compares them against the configured setpoints and sequences, and drives its outputs to valves, actuators or fan speed accordingly, exactly like a simple thermostat but with far more inputs, outputs and control functions available on one device.
How to choose a Proxima control unit
- Protocol: the CU supports Modbus RTU, Modbus TCP, BACnet MS/TP and BACnet IP; the CU-LH-MOD supports Modbus RTU only, on the Produal PUMP platform.
- Rooms per unit: the CU can control two rooms from one unit over its RS-485 bus, useful where panel space or wiring runs are tight.
- Inputs: 6 universal inputs accept NTC10 or Pt1000 sensors, 0 to 10 VDC signals, resistive or digital contacts.
- Outputs: 6 universal outputs support 0 to 10 VDC (up to 2 mA), 4 to 20 mA (under 700 Ω), or 24 VAC PWM (under 1 A) actuators.
- Output function: each output is configured for heating, cooling, a 6-way valve, a 3-point actuator or fan speed, so one unit adapts to different terminal unit types.
- Supply and enclosure: 22 to 26 V AC/DC under 7 VA, -5 to 50 °C operating range, IP22 housing for indoor panel or ceiling void mounting.
- Commissioning: the Produal MyTool Android app configures the unit, with settings saveable to MyCloud for repeatable multi-unit projects.
For a single-room controller instead of a zone control unit, see Room controllers HLS 44.
FAQ
Common questions
Which BMS protocols does the Proxima CU support?
Modbus RTU and Modbus TCP, plus BACnet MS/TP over RS-485 and BACnet IP over Ethernet. That covers the common integration protocols specified on most Indian BMS projects, letting one control unit type serve either a Modbus-only or a BACnet-specified building.
Can a Proxima control unit drive a 6-way valve?
Yes. 6-way valve control is one of the selectable output functions on the Proxima CU, alongside heating, cooling, 3-point actuators and fan speed, configured per output rather than fixed at the factory.
What sensors can connect to a Proxima CU?
Its six universal inputs accept passive NTC10 or Pt1000 sensors, 0 to 10 V transmitter signals, or resistive and digital contacts. That range covers most room temperature sensors, CO2 or humidity transmitters, and simple window or occupancy contacts on the same unit.
How is a Proxima CU commissioned?
Through the Produal MyTool Android app, which connects to the unit for configuration, and can save the settings to MyCloud. This suits contractors setting up the same configuration across many rooms on a project without reprogramming each unit from scratch.
Can one Proxima CU really control two separate rooms?
Yes, over its RS-485 bus, with each room's inputs and outputs configured independently. This is useful on projects where panel space or the number of field wiring runs is limited, since one control unit replaces two single-room controllers.
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