Why Choose the Pizzato CS AM12F1MU-P7 Safety Module?
The Pizzato Elettrica CS AM12F1MU-P7 is a dedicated motor standstill detection safety module from the CS AM Series, designed for machinery where hazardous access or another safety-related action must be controlled according to the actual stopped condition of an electric motor. The module uses sensorless monitoring of the motor to provide reliable standstill detection without requiring a separate external speed sensor for the safety function.
The CS AM12F1MU-P7 is designed for safety applications up to Category 4, SIL 3 and PL e. It operates from a 24 V DC supply and provides 3 NO safety relay contacts, allowing the verified motor condition to be incorporated into compatible guard-locking, machine-access and safety-control circuits.
This non-programmable CS AM12 version uses a connector with screw terminals and supports standstill monitoring of compatible single-phase and three-phase AC motors. The CS AM1 series determines movement by measuring the residual voltage generated by a rotating motor, providing a direct method of establishing whether hazardous motor movement remains present.
Key Advantages
- Dedicated motor standstill detection for machine-safety applications.
- Suitable for safety systems up to Category 4, SIL 3 and PL e.
- Sensorless monitoring principle eliminates the need for an external speed sensor for the standstill safety function.
- 3 NO safety relay contacts for integration with compatible machine-safety circuits.
- Standard 24 V DC supply for industrial control panels.
- Supports compatible single-phase and three-phase motor measuring circuits.
- Galvanic separation between the control and motor measuring circuits.
- Connector with screw terminals provides secure and serviceable electrical connections.
Key Features
- Pizzato Elettrica CS AM Series motor monitoring safety module.
- Motor standstill detection safety function.
- Designed for applications up to PL e.
- Designed for applications up to SIL 3.
- Designed for applications up to Category 4.
- 3 normally open safety relay contacts.
- 24 V DC supply voltage.
- Non-programmable configuration.
- Connector with screw terminals.
- Standstill detection based on motor residual-voltage monitoring.
- Supports single-phase and three-phase AC motors for standstill monitoring.
- Galvanic separation between control and measuring circuits.
- 45 mm wide housing for industrial control-panel installation.
- Suitable for guard locking and safety-related machine access applications.
How Motor Standstill Safety Monitoring Works
Motor standstill monitoring is used where access to hazardous machine areas or another safety-related function depends on dangerous motor movement having stopped. The Pizzato CS AM1 series monitors the residual voltage generated at the motor windings while the motor is rotating. When the detected voltage indicates that movement is still present, the module maintains the appropriate safety-output state; once the monitored condition corresponds to standstill, the safety circuit can respond accordingly.
This sensorless approach allows the safety system to evaluate the actual electrical condition associated with motor rotation rather than simply assuming that the motor has stopped because its power supply has been disconnected. With 3 NO safety relay contacts and suitability for applications up to Category 4, SIL 3 and PL e, the CS AM12F1MU-P7 can form part of high-performance machine-safety architectures when selected, installed and validated in accordance with the manufacturer's requirements.
Typical Applications
- Motor standstill monitoring in industrial machinery.
- Guard-locking safety systems.
- Machine access control after hazardous movement has stopped.
- Rotating machinery and motor-driven equipment.
- Machine tools and machining centres.
- Packaging and production machinery.
- Conveyor and material handling systems.
- Industrial mixers and processing machinery.
- Maintenance access interlocking.
- Safety circuits requiring verified motor standstill before operator access.
