Further information for Phoenix Contact Phoenix 2981680 expansion module - PSR-SPP- 24DC/URM4/4X1/2X2/B
1-channel contact extension with TBUS interface, 4 NO contacts, 1 NC contact, 1 feedback current path, undelayed, Cat. 4, PL e according to EN ISO 13849, width: 22.5 mm, pluggable push-in terminal