What lands on the DIN rail
The ABB 1SVR405667R0000 is a CR-U series electronic timing module built to drop into a standard relay socket on the PLC expansion line, carrying the FUNC T timing-function variant in the CR-U family. It is catalogued as a plug-in timer module, so panel layout treats it the same way as a control relay: one socket footprint, one timing function, one set of coil/supply terminals to land. Category placement on the PLC expansion side is what decides which panel rows this device sits next to — typically the I/O termination strip on a subpanel that handles sequenced starts, star-delta staging, or pump changeover delays in a control scheme.
Where this class earns its keep
Plug-in electronic timing modules of this class run the timing element in pumped-station panels, mixer sequencing in treatment trains, and star-delta or transition staging in motor starter bays — anywhere a control relay footprint with a configurable time delay replaces a dedicated timing relay wired from discrete components. On a PLC expansion panel the timer module typically handles the auxiliary timing the PLC's scan would otherwise have to police — off-delays on blowers, on-delays on pump restarts, interlock hold-off timers between contactors. That keeps the CPU out of millisecond-resolution timing work and lets the I/O do the switching.