Expansion safety relay, 4NO + 1NC

Safety relay expansion module (4NO, 1NC ) (SAFE X4.1)

Safety relay, SR4001

The safety relay SR4001 can be used in applications together with:
  • Electro sensitive protective equipment (ESPE) type 4 (light curtains).
  • Electro sensitive protective equipment (ESPE) type 2 (light curtains) performing self test.
Includes DIN rail for mounting.

Technical Data



Supply voltage

24 V DC (electronic fuse)

Contact allocation

3 normally open

Contact type

Positive guided relay


22,5 x 114,5 x 99 ( w x h x d )[ mm ]

Tested in accordance with

EN ISO 13849-1

Achieved level/category

Performance Level e , Cat.4

MTTFd [years]

36,16 “high”


ISB safety relay manual

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