Sicherheitseigenschaften Kontakterweiterungen allg_PNOZ The unit meets the following safety requirements:

* The contact expansion module expands

an existing circuit. As the

output relays are monitored via the

base unit's feedback loop, the safety

functions on the existing circuit

are transferred to the contact expansion

module.

* The safety function remains effective

in the case of a component failure.

* Earth fault in the feedback loop:

Detected, depending on the base

unit that is used.

* Earth fault in the input circuit:

The output relays de-energise and

the safety contacts open.