1. This is an industrial safety relay from Siemens, part of the 3SE5 series.
2. It is a two-channel safety relay with two normally closed contacts, with a voltage rating of up to 400V, up to 5A and a switching frequency of 150Hz.
3. It also features a safe-torque-off option that prevents injury from equipment switching on during maintenance, and a single-channel, two-channel and multi-channel status indicator.