MS27
Controller for Compressor or Fan Systems
The MS27 is a compact controller for multi-stage compressor or fan systems, designed for DIN rail mounting. In addition to controlling 4 compressors via outputs OUT1 … OUT4 in combination, it is also possible to regulate an additional speed-controlled compressor for intermediate load adjustment via the PWM output. For optimised inverter control, we utilise the frequency converter’s manual potentiometer input to pre-set the inverter speed from 0 … 100%.
Properties
- 4 outputs for controlling single or multi-stage compressors or fans
- Proportional output (PWM) for speed control via an inverter
- Input for pressure sensor (PGT 8 / 15 / 35), or temperature sensor NTC10k
- 2 digital inputs with potential-free contact (function parameterisable)
- 3 optically isolated digital voltage inputs for system diagnostics
- Selection of control algorithm between output rotation / sequential activation / power optimisation
- Changeover contact output for alarm management
- Storage of the last 9 alarms
- Automatic maintenance indicators
- Pressure – temperature – switching depending on the refrigerant used
- RS485 interface for integration into monitoring systems
Advantages
- Suction and condensation control / pressure and temperature-controlled
- Option for controlling a speed-controlled compressor
Technical data
| MS27-1SE-B | ||
|---|---|---|
| Sensor Input | Temperature-controlled | Pressure-controlled |
| Sensor Type | NTC10k (SN4B20P1) | – |
| Pressure Transmitter | – | PGT 8 / 15 / 35 |
| Standard Equipment | – | – |
| Sensor Measuring Range | -40°C … +105°C | Sensor-dependent |
| Electronics Control Range | -50°C … +140°C | -1.0 … +45.0 bar |
| Resolution | 0.5° | 0.1 bar |
| Input | DI1 … DI5 (parameterisable) | |
| Terminals | Screw terminals | |
| Output type | ||
| Relay 1 / N.O. Contact | 5 (1)A OUT 1 | |
| Relay 2 / N.O. Contact | 5 (1)A OUT 2 | |
| Relay 3 / N.O. Contact | 5 (1)A OUT 3 | |
| Relay 4 / N.O. Contact | 5 (1)A OUT 4 | |
| Relay 5 / Changeover Contact | 7 (2)A Alarm / potential-free | |
| PWM Output | 0 … 100% | |
| Interface | RS485 | |
| Power supply | 230Vac | |
| Dimensions WxHxD | 72x94x60mm | |
| Installation dimension | DIN rail | |
| Front protection class | IP 55 | |
| Certification | CE | |