Safe Monitoring of Position and Movement

Compact Solution with KE4 Speed Module and Monitor up to PL e and SIL 3

Pepperl+Fuchs: The KE4 speed module and monitor from Pepperl+Fuchs enable safe, simultaneous monitoring of speed and position. The compact solution offers numerous interfaces and protocols for universal use in a range of safety architectures, including AS-Interface.

Speed Module
Two rotary encoders or linear measuring sensors can be connected to the speed module via TTL, SSI, or sin/cos interfaces. Two safe outputs and a variety of safety functions enable it to be used in safety-critical applications. With paired encoders or with one secure encoder per axis of rotation, the module satisfies the requirements of safety level PL e. The KE4 speed module alone offers a cost-effective way to implement small, decentralized safety applications. In combination with the monitor, larger and more complex applications can be controlled safely. The safety logic remains decentralized and transparent, while no expensive, higher-level safety controller is required.

Monitor
The KE4 monitor enables safe position areas or speeds to be parameterized and controlled in a decentralized manner. There are eight logical trip circuits offering a wide range of safety options. Parameterization is performed using PC software, and the configuration is stored on a memory card in the monitor. That means components can be replaced without reparameterization. Communication via the AS-Interface enables the safety system to be expanded to include many nodes over long distances. Higher-level Safe Link communication can be used as a safe way to connect multiple AS-Interface systems for large and complex safety applications.

Applications
The speed module - with or without the connected monitor - can be used to monitor such applications as the pivoting range of cranes, the position when lifting and lowering the crane boom, the safe area on a rotary table, speed in production lines, position and speed in driverless transport systems, and deceleration ramps for stacker cranes. Numerous sensor technologies from Pepperl+Fuchs are available for signal transmission purposes, including rotary encoders in various designs, inductive and ultrasonic position sensors, camera-based systems, and photoelectronic distance sensors. Sensors from other manufacturers can be connected.

At a glance:

• Safe monitoring of permitted movement ranges
• Safe monitoring of speed ranges
• Implementation of shut-off functions
• Safe restart
• Safe networking
• Integration in an AS-Interface network
• Safe pairing of signals