pi safety
SW.Ex Switching Relays and IR.Ex Binary Sensors
SW.Ex and IR.Ex product families provide relay-based monitoring for classified environments where switching points, hysteresis and binary outputs are required rather than continuous analogue output.
Product Overview
Explosion-protected switching relays and binary sensors for temperature, humidity, pressure and volume-flow alarm/control duties. DAS can assist with product selection, availability, technical documentation and project-specific requirements.
Features & Benefits
- Universal switching relay for mounting in zones 1, 2, 21 and 22.
- Two adjustable potential-free relay outputs.
- Adjustable hysteresis and on-site display configuration.
- IR.Ex sensor options for room and duct temperature, humidity and pressure/volume-flow applications.
- No additional control-cabinet barrier requirement is referenced for the SW.Ex system.
Applications
- Hazardous-area pressure alarms
- Temperature and humidity limit monitoring
- Damper and ventilation interlocks
- Industrial classified-area automation
Technical Specifications
| SW.Ex Certification | II2(1)G Ex eb mb ib [ia Ga] IIC T4 Gb; II2(1)D Ex tb ib [ia Da] IIIC T130C Db |
|---|---|
| Sensor Families | IR.Ex-RT, IR.Ex-DT, IR.Ex-RH, IR.Ex-DH and IR.Ex-P variants |
| Outputs | Two potential-free relay outputs |
| Power Supply | 24 VAC/DC |
| Protection | IP66 |
| Pressure Ranges | +/-60 Pa through +/-10000 Pa variants listed in the PDF |