PSR-SCP- 24DC/URM4/5X1/2X2/B - 1-channel or 2-channel contact extension, 5 N/O contacts, 1 N/C contact, 1 confirmation current path, together with basic device up to Cat. 4 PL e in accordance with EN ISO 13849 safe isolation, width: 22.5 mm, pluggable screw terminal block