Overview
The Banner SI-LS42DMH safety interlock switch is a solenoid-locking model designed for machinery guard applications requiring positive-opening safety contacts. This interlock body provides 24 VAC/DC solenoid voltage with 2 NC and 1 NC/1 NO contact configuration in a thermoplastic housing measuring 170 x 43 x 45 mm. The SI-LS42DMH meets safety standards for machinery protection and is commonly installed in dual-channel configurations to achieve higher performance levels (Category 4/PL e).
Key Features
- Solenoid-locking mechanism with spring-unlock design
- Positive opening safety contacts compliant with IEC 60947-5-1
- 24 VAC/DC solenoid voltage for standard control circuits
- Dual contact configuration: 2 NC + 1 NC/1 NO for flexible control logic
- IP67-rated thermoplastic housing for industrial environments
- Rotatable actuator for horizontal or vertical mounting
Technical Specifications
- Solenoid Voltage: 24 VAC/DC
- Contact Configuration: 2 NC, 1 NC/1 NO
- Locking Style: Solenoid Locking (spring unlock)
- Dimensions: 170 x 43 x 45 mm
- Housing: Thermoplastic, IP67 rated
- Weight: 2.0 lbs
- Manufacturer: Banner Engineering
- Part Number: SI-LS42DMH
- Model Code: 47877
Typical Applications
Safety interlocks with positive opening requirements are essential in manufacturing and automation. The SI-LS42DMH is used to control access to machinery guards, prevent operator contact with hazardous areas, and integrate into safety control circuits. Common installations include:
- Interlocked guard doors on presses, saws, and guillotines
- Protective enclosure access points on assembly equipment
- Dual-channel safety circuits connected to safety modules and controllers
- Machine tools and packaging machinery requiring Category 3/4 safety performance
Compatibility & Replacements
Compatible With
- Banner safety modules and safety controllers
- PLCs and safety-rated control systems supporting 24 VDC logic
- Dual-channel safety circuit configurations
- Industrial automation systems with positive-opening contact requirements
- Standard 24V control voltage supplies (AC or DC)
Replaces / Drop-In Replacement For
The SI-LS42DMH is a specific solenoid-locking model. Verify compatibility with your system integrator before ordering, as contact configuration and locking mechanism must match your guard and control requirements. Other SI-LS42 variants exist with different locking styles (spring vs. solenoid) and contact configurations.
Works With
- Banner safety modules and sensor evaluation devices
- Standard 24 VAC/DC safety control circuits
- Dual-channel interlocking systems
- IEC 60204-1 and ANSI B11.19 compliant machinery controls
- EtherCAT and real-time safety networking (via compatible interface modules)
