DEHN schützt die Prozessindustrie
DEHN protects Process Technology

BLITZDUCTOR® ML4 BPD 24 for process automation systems

In automation technology and process control, different communication technologies are used between the control system and sensors/actuators. DEHN has now developed a new surgeprotection module which is specifically suited for digital signals (DI/DO).

The BXT ML4 BPD 24 combined arrester1 protects 24 V d.c. interfaces with earthed negative pole.

In case of a fault, high short-circuit currents flow through battery-backed 24 V d.c. systems for supplying digital outputs. This may overload the arrester.


Signal short-circuits and system faults – Prevent arrester failure

To prevent overload and failure of the arrester, the potential short-circuit current is limited by PTC resistors in the circuit. Thus, the BXT ML4 BPD 24 is ideally suited for circuits with short-circuit currents as high as 40 A in case of a fault.


Arrester testing during operation

Arresters can be easily tested without disconnecting the signal loop by means of the LifeCheck® monitoring system.


1 SPD class 

Key facts at a glance

  • No arrester backup fuse needed for short-circuit currents up to 40 A
  • The arrester can also be used for systems with earthed negative pole  
  • No overload resulting from system faults in the signal circuit
  • LifeCheck® arrester monitoring

Have you got any questions? Contact us.

Technical support

Phone: +49 9181 906 1600

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