Siemens - 3TK2810-1BA42 - Sirius Safety Relay Safety-oriented Speed Monitoring 24 V Dc, 45 Mm Overall Width Spring-type Terminal Ec Instantaneous: 2 No Ec Delayed: 0 Sc: 2 Electrical Auto-start/manual Start Basic Device Maximum Achievable Pl According To En 13849-1: E Maximum Achievable Sil According To Iec 61508: 3