Alarm inputs and outputs certified to EN 50131-1

Cybersecurity doesn't start with the software, but with the physical barrier. To prevent network tampering, we use alarm inputs and outputs to actively protect critical nodes. By linking LAN-RING switches to PIR sensors and door contacts, administrators gain instant visibility of movement in technical areas. Integrated tamper switches that connect directly to the alarm inputs of the switches are therefore standard on our outdoor switchgear of the OH series (from a height of 40 cm). The IPLOG units then serve as a bridge that relays these security events to the alarm systems.

Alarm inputs

IN1 and IN2 inputs on LAN-RING switches configured in ALARM mode. In this mode,
measures input resistance from 0 to 30 kOhm.
Thus, they allow to detect PIR sensor states such as normal state, alarm, tamper, fault, etc.

Alarm outputs

The BO outputs on IPLOG controllers and BO8.1-05 modules are alarm resistive outputs with 8-bit resolution.

Schematic diagram of a typical connection

List of models

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Note: Certification of alarm inputs and outputs according to EN 50131-1 is valid up to level 4.