Overview
The Electro Sensors M100 is a compact, self-contained shaft speed switch designed for monitoring rotational speed in industrial automation and process equipment. Operating at 115 VAC and 50-60 Hz, it ensures equipment operates within desired speed parameters, enhancing safety and efficiency. The M100 features easy installation and calibration, rugged dust-, dirt-, and grease-proof construction, and failsafe operation.
Key Features
- Relay setpoint range between 10 RPM and 100 RPM, allowing precise speed threshold configuration
- Cast aluminum housing rated for Class I, Div I (D) and Class II (E, F, G) environments
- SPDT 5-A relay contact for equipment shutdown and alarm functions
- Rugged, dust-, dirt-, and grease-proof design ensures durability in harsh industrial environments
- Failsafe operation provides reliable performance by defaulting to a safe state in case of failure
Technical Specifications
- Power Supply: 115 VAC, 50-60 Hz only
- Power Draw: 4.6 VA
- Setpoint Range: 10-100 RPM (adjustable)
- Relay Output: SPDT Form C
- Relay Rating: 5 Amp at 30 VDC or 230 VAC resistive
- Housing: Cast aluminum, explosion-proof
- Operating Temperature: -40°F to +140°F
- Sensing: Internal magnetic sensor with Hall Effect technology
- Electrical Connections: Terminal-based (standard M100) or terminal strip (M100T)
- Certifications: UL Listed, CSA Approved for Class I, Div I and Class II hazardous locations
Typical Applications
The M100 is ideal for detecting unwanted slowdown or stoppage of process equipment. In the event of rotational failure, such as broken drives, belt slippage, product overloads, clogs and jams, the SPDT 5-Amp control relay can be used to provide equipment shutdown and/or alarm. Common applications include monitoring equipment like conveyors, crushers, and exhaust fans, ensuring machinery operates within safe speed limits.
Compatibility & Replacements
Compatible With
- Standard 115VAC power supplies (50/60 Hz)
- Conventional control relay circuits
- Electro-Sensors magnetic pulser discs and wraps
- Industrial automation equipment with SPDT input requirements
Replaces / Drop-In Replacement For
- Legacy Electro Sensors M100 units with 115VAC-only power
- Original equipment manufacturer (OEM) applications requiring 10-100 RPM setpoint range
Works With
- Mechanical relay logic circuits
- Programmable Logic Controllers (PLCs) with relay input modules
- Motor starters and soft starter monitoring
- Alarm and shutdown control systems
- For new designs or replacements, Electro Sensors recommends the M100T or M5000T models, which offer additional voltage options (230VAC, 12/24VDC) and a terminal strip for easier installation.
