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Safety switching goes modular

Safety switching goes modular
Phoenix Contact's PSR modular system is built around a universal master, which is responsible for monitoring safety-oriented signals. Subject to requirements, up to four secure off-delay or instantaneous contacts can be connected via the T-bus rail bus connection to extend each module. 

The power supply, a safe switched potential, and the feedback loop are controlled via the T-bus. Each function, for example an emergency cut-out, safety door or light barrier, can consequently switch to up to ten expansion modules without cross-wiring faults. 

Pluggable connection terminals are available as standard with screw or spring-cage technology. The new spring-cage connection terminals can be opened at the front with the use of a screwdriver, which opens two clamps. As a result, the wires can be conveniently released and re-wired. Flexible wires with ferrules can be plugged directly into the clamps without the use of tools.
 
Phoenix Contact

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