Integrated Machine Safety Controls
Zero-Speed Safety Monitoring Systems
Zero-speed safety relays detect machine stops before allowing access or safe-entry operations.
Monitors motor rotation and verifies zero-speed conditions for safe operator entry and maintenance.
Zero-speed monitoring devices detect when a machine’s shaft, rotor, or conveyor has completely stopped before allowing access to hazardous areas. These sensors and relays ensure operators cannot open guards, initiate maintenance, or enter a danger zone until motion has safely reached zero. Essential for mixers, grinders, presses, conveyors, and high-inertia equipment, zero-speed monitors help facilities comply with OSHA and ANSI machine-guarding requirements by preventing unexpected movement and dramatically reducing the risk of injury.
User-Friendly Design
- No external sensors required on many models—uses back EMF from the motor.
- Rotary-sensor versions available for high accuracy on low-speed equipment.
- LED indicators provide simple, at-a-glance status of rotation and stop-state.
Flexible Mounting Options
- DIN-rail mounted relays for control panels.
- Encoder or proximity-sensor inputs for shaft monitoring.
- Adjustable trip thresholds for different machine inertia levels.
Seamless System Integration
- Output contacts tie directly into safety circuits, interlocks, and guard-door solenoids.
- Meets ISO 13849 and ANSI safety requirements for safe access.
- Often paired with light curtains or vertical safety doors for safe “zero motion” access.
Zero-Speed Safety Monitoring Systems
Zero-speed safety relays detect machine stops before allowing access or safe-entry operations.
Monitors motor rotation and verifies zero-speed conditions for safe operator entry and maintenance.
Zero-speed monitoring devices detect when a machine’s shaft, rotor, or conveyor has completely stopped before allowing access to hazardous areas. These sensors and relays ensure operators cannot open guards, initiate maintenance, or enter a danger zone until motion has safely reached zero. Essential for mixers, grinders, presses, conveyors, and high-inertia equipment, zero-speed monitors help facilities comply with OSHA and ANSI machine-guarding requirements by preventing unexpected movement and dramatically reducing the risk of injury.
User-Friendly Design
- No external sensors required on many models—uses back EMF from the motor.
- Rotary-sensor versions available for high accuracy on low-speed equipment.
- LED indicators provide simple, at-a-glance status of rotation and stop-state.
Flexible Mounting Options
- DIN-rail mounted relays for control panels.
- Encoder or proximity-sensor inputs for shaft monitoring.
- Adjustable trip thresholds for different machine inertia levels.
Seamless System Integration
- Output contacts tie directly into safety circuits, interlocks, and guard-door solenoids.
- Meets ISO 13849 and ANSI safety requirements for safe access.
- Often paired with light curtains or vertical safety doors for safe “zero motion” access.
- Assembly consists of:
- Zero-speed safety relay.
- Configuration sheet / DIP switch chart.
- Terminal labels and wiring guide.
- Note: Sensors (if required) sold separately.
- Common uses include:
- Mixers, grinders, large conveyors, mills, and high-inertia rotating equipment.
- Press brakes, saws, shredders, and spinning tooling.
- Applications where coasting stop time must be verified.
