Why Choose the Pizzato CS AM12F1MU-P4 Safety Module?
The Pizzato CS AM12F1MU-P4 is a dedicated motor standstill detection safety module designed for safety-related monitoring of electric motors in industrial machinery and automation systems. As part of the Pizzato CS AM series, it detects when a motor has reached a safe standstill condition, helping ensure that access to hazardous machine areas or subsequent safety functions are permitted only after dangerous movement has stopped.
The CS AM12F1MU-P4 operates from a 24 V DC supply and provides three normally open (3 NO) safety relay contacts. It supports safety applications up to PL e, SIL 3 and Category 4, making it suitable for machinery where dependable standstill monitoring forms an important part of the functional safety system.
Motor standstill can be detected by monitoring residual voltage on the motor phases, allowing sensorless monitoring without requiring an external motion sensor for the safety function. The module provides 10 sensitivity levels for residual-voltage detection, galvanic separation between the control and measuring circuits, and compatibility with single-phase and three-phase motors. This non-programmable version uses a connector with screw terminals and is housed in a compact 45 × 114 mm enclosure for control-cabinet installation.
Key Advantages
- Dedicated motor standstill detection safety module for industrial machinery.
- Suitable for safety applications up to PL e, SIL 3 and Category 4.
- Three normally open safety relay contacts for integration with machine safety circuits.
- 24 V DC supply voltage suited to modern industrial control systems.
- Sensorless standstill monitoring can eliminate the need for an external motion sensor for the safety function.
- 10 residual-voltage sensitivity levels allow standstill detection to be matched to motor characteristics.
Key Features
- Pizzato CS AM series motor monitoring safety module.
- Motor standstill detection safety function.
- 24 V DC rated supply voltage.
- 3 NO safety relay outputs.
- Safety performance up to PL e / SIL 3 / Category 4.
- Sensorless residual-voltage monitoring of motor phases.
- 10 selectable sensitivity levels for residual-voltage detection.
- Compatible with single-phase and three-phase motors.
- Galvanic separation between control and measuring circuits.
- Non-programmable configuration.
- Connector with screw terminals for electrical connection.
- 45 mm wide housing for DIN-rail control-cabinet installation.
Reliable Motor Standstill Monitoring for Machine Safety
Motor standstill monitoring is essential where access to hazardous machine areas must remain restricted until rotating or moving equipment has stopped. The Pizzato CS AM12F1MU-P4 monitors residual voltage generated on the motor phases and uses this information to determine when the motor has reached the configured standstill condition, allowing the safety outputs to change state accordingly.
This sensorless approach can simplify machine safety design because the safety function does not require an additional external motion sensor. With galvanic isolation between its control and measuring circuits, selectable residual-voltage sensitivity and safety relay outputs, the CS AM12F1MU-P4 provides a practical solution for integrating standstill detection into safety interlocks, guard-locking systems and automated machinery.
Typical Applications
- Motor standstill monitoring on industrial machinery.
- Guard locking and hazardous-area access control.
- Machine tools and rotating production equipment.
- Conveyors and material handling machinery.
- Mixers, centrifuges and processing equipment.
- Automated manufacturing and machine safety systems.
