Schischek EXL-IRU-1

Product Brief: Part of Schischek’s ExLine (Explosion-protected) family — the EXL-IRU-1 is an intrinsically safe interface / sensor module or compact rotary actuator variant used in HVAC and process damper control within hazardous areas (Zone 1/2, 21/22). It provides 90° rotary motion for dampers or small butterfly valves and is ATEX/IECEx certified for use with Ex i (intrinsic safety) field circuits.

Category: Others

Description

Typical Specifications (EXL series rotary actuators):

Torque Range (actuator variants): Typically 4–25 Nm (check exact sub-type plate); EXL-IRU-1 may denote interface relay/switch module variant
Rotation Angle: 0–90° (adjustable mechanically)
Control Signal: 2-position (SPDT/SPST) or modulating 0–10 V / 4–20 mA (if positioner-equipped)
Feedback: Potentiometric or 4–20 mA position feedback (optional)
Supply: 24 VAC/DC (typical for Ex i versions)
Ex Protection: ATEX / IECEx — Ex ia/ib IIC T4/T6 Gb (gas), Ex tb IIIC Db (dust); suitable Zones 0/1/2 & 20/21/22 depending on certification
Enclosure: Die-cast aluminum, epoxy-coated; IP66 / IP67
Ambient Temp: –20 to +60 °C (some variants –40 to +70 °C)
Manual Override: Hand lever or declutch knob standard on actuator models

Features:

Spring-return (fail-safe open/close) or non-spring-return versions
Integrated limit switches and position feedback
Compatible with Schischek ExFix mounting kits for direct damper shaft coupling

Application: Fire/smoke damper control in petrochemical plants, HVAC in hazardous areas, small process valve actuation in Zone 1/2 environments.

Installation Notes:

Verify Ex certificate marking matches plant zone classification.
Use only certified Ex i barriers/Zener barriers in safe area when interfacing with non-Ex control systems.
Do not open housing in hazardous area unless power is disconnected and area is verified gas-free.

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