Surge Protection Barrier M-LB-Ex-2142, Number of protected signal lines, Devices for Signal Line Protection, Surge protection barrier for 2 signal lines, Nominal voltage 24 V DC, Surge protection barrier for non-grounded signal lines, Max. surge current (8/20 ?¶Ãs) 20 kA, Connection via screw terminals, DIN rail mountable, Up to SIL 3 acc. to IEC/EN 61508