RWF5550A9
Siemens Compact universal PID temperature RWF55.50A9
Siemens
Siemens Compact universal PID temperature RWF55.50A9
['Home', 'Combustion Controls', 'Universal Controllers', 'Siemens RWF55.50A9'] Need Siemens RWF55.50A9? Compact univers…
Specifications
| Brand | Siemens |
|---|---|
| Model Number | RWF55.50A9 |
| Official Product Name | RWF55 Compact Universal Controller |
| Applicable System | Modulating and multi-stage burners, boilers, HVACR |
| Product Type | Compact universal PID temperature/pressure controller |
| Equivalent Standard | Available on request |
| Product Status | Active / Available |
| Power consumption | Max 20 VA |
| Panel dimensions | 96 x 48 mm, depth 122 mm |
| Analog inputs | Pt100/Pt1000, LG-Ni1000, TC J/K/T/N/S/R/B, 0-10 V, 4-20 mA, 0-20 mA |
| Digital inputs | 2 passive |
| Relay outputs | 3 relays (K2/K3) + 1 multifunction (K6) |
| Analog output | 1 configurable (0-10 V / 4-20 mA / 0-20 mA) |
| Communication | Modbus RTU via RS-485 |
| Display | Dual 4-digit 7-segment LED (actual red / setpoint green) |
| Control modes | PID, 3-position, 2-position, heating/cooling |
| Front protection | IP66 (with gasket); rear IP20 |
| Operating temperature | -20 to +50 deg C |
| Storage temperature | -40 to +70 deg C |
| Relative humidity | <= 95% non-condensing |
| Country of origin | Germany |
| Power supply | AC 110-240 V, 48-63 Hz |
Product Description
It combines 3-position relay control with a configurable analog output and an integrated RS-485 Modbus RTU interface, and features universal analog inputs, built-in PID self-tuning, heating/cooling reversal and thermal shock protection for safe cold-start operation. The Siemens RWF55.50A9 is a compact universal controller for temperature and pressure regulation of modulating and multi-stage industrial burners and boilers.
Basic Product Information
- Integrated RS-485 Modbus RTU communication
- Universal analog inputs: RTD, thermocouple and standard signals
- Built-in PID self-tuning and heating/cooling reversal
- Thermal shock protection (ramp) for cold-start boiler safety
- IP66 front panel with IP20 rear housing
- 3-position relay control plus configurable analog output (0-10 V / 4-20 mA)
Technical Specifications
Version & Model Difference
[{'item': 'Family', 'value': 'RWF55 series; upgrade from RWF50.30A9 (adds Modbus, setpoint changeover, outdoor reset, limit comparator)'}, {'item': 'Variants', 'value': 'RWF55.60A9 adds PROFIBUS-DP; RWF55.51A9 / 61A9 are 20-piece packs'}]
Application Scenarios
- Temperature/pressure control of oil and gas modulating burners
- Boiler and process heater control (standalone or with LMV)
- Outdoor air reset heating plant control
- Cooling system control in reverse-action mode
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Frequently Asked Questions
What power supply does the RWF55.50A9 use?
It operates from AC 110-240 V at 48-63 Hz with a maximum power consumption of 20 VA and a 96 x 48 mm panel format.
Which communication interface is built in?
The controller includes a standard RS-485 Modbus RTU interface for remote monitoring and BMS/SCADA integration.
What control modes are supported?
It supports PID, 3-position relay and 2-position control, with switchable heating/cooling action and built-in self-tuning.
What is the operating temperature range?
The RWF55.50A9 works from -20 to +50 deg C (storage -40 to +70 deg C) with a front panel rating of IP66.
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