ABB CT-MBS.22S Multifunction Time RelayCT MBS. 22S Time relay, multifunction 2c o, 24 48VDC, 24 240VAC The CT MBS. 22S is a multifunction electronic time relay from the CT S timer range. It provides 10 timing functions with 10 time ranges from 0. 05 s to 300 h. This time relay operates with a rated control supply voltage of 24 48 V DC 24 240 V AC and has a 2 c o (SPDT) output with contacts rated at 250 V 4 A. A control input works with volt free (floating) triggering. The CT MBS. 22S