The RLE-S Interface Module provides secure supervision and control of external applications, such as fire extinguishing systems. The module is in conformity with the VdS 2496: 2005 standard and operates from a low supply current. It features a low voltage relay, two supervised input lines plus one input line that can be programmed as a relay feedback. The module is DIN-rail mountable but is also delivered with a housing for surface mounting.

The 420 Series now also includes an Octo-Output Interface Module with 2 inputs for controlling LED tableaus. Each of the inputs features a monitoring function (EOL or contact) that can be selected individually. The module also has eight individually-switchable open collector outputs that are electrically isolated from the LSN loop and short-circuit proof. Maximum switchable current per output is 700 mA. The module comes with a pluggable terminal block for easy wiring.

The new Output-Input Interface Module for controlling external devices features an open-collector output which is electrically isolated from the LSN loop and short-circuit proof, a maximum switchable current per output of 700 mA, and individually-selectable input monitoring functions. It is available in a DIN-rail and an in-built version.

In common with all modules in the 420 Series, the new additions are delivered in a robust, installer-friendly housing with the electronics encapsulated inside.