Overview
The Break-A-Beam M-200-DC relay actuator (part number 4939358) is an infrared beam-break safety device engineered for industrial automation, motion control, and operator interface applications. This linked infra-red light beam is housed in an ergonomically designed enclosure that supplies an output signal when an operator lays their hands in the contoured nest and “breaks the beam”. The DC-powered variant is ideal for 24V control systems where AC power is unavailable or undesirable.
Key Features
- 4PDT Relay Output: All units are equipped with 4PDT relays to provide 3 normally open and 3 normally closed outputs, offering flexible switching logic
- Ergonomic Design: Contoured nest shape reduces operator fatigue and ensures consistent beam interruption
- Infrared Detection: Linked beam technology provides reliable, non-contact actuation
- 24VDC Operation: Suitable for DC-powered control cabinets and low-voltage systems
- Industrial-Grade Construction: Built for harsh manufacturing environments with long operational life
Technical Specifications
- Part Number: 4939358
- Model: M-200-DC
- Manufacturer: Break-A-Beam
- Input Power: 24 VDC
- Relay Configuration: 4PDT
- Normally Open Outputs: 3
- Normally Closed Outputs: 3
- Activation Method: Infrared beam break
- Enclosure Type: Ergonomic hand-nest design
- Application: Industrial automation, safety control, operator interfaces
Typical Applications
- Replacement for mechanical palm buttons on existing industrial machinery
- Safety interlocks and emergency stop circuits
- Production line operator controls and cycle start/stop functions
- Guard and enclosure monitoring in manufacturing systems
- Motion control signal generation for automated equipment
Compatibility & Replacements
Compatible With
- 24VDC control systems and PLCs
- Industrial relay and contactor circuits
- Machine control panels requiring 4PDT switching
- Safety-rated control systems (verify with system integrator)
Replaces / Drop-In Replacement For
- Break-A-Beam M-200 models with 24VDC variant requirements
- Mechanical palm button actuators in 24VDC circuits
- Other Break-A-Beam series devices requiring 4PDT relay output
Works With
- Relay logic and hardwired control circuits
- PLC-based control systems (as external input device)
- Industrial safety relay modules
- Standard 24VDC power supplies and bus systems




