The Siemens 6ES7924-0CA10-0BB0 is a terminal block for the SIMATIC ET 200SP distributed I/O system, providing 8 channels of potential supply through 2×10 spring-cage terminals. It includes an infeed function for distributing a common voltage rail across I/O modules, with LED indication per channel for quick status checks on the line. Rated at 60 V and 1 A, this block handles the control voltage supply for digital and analog I/O modules in the ET 200SP slice. The 1 A rating covers the backplane current draw of a typical module stack — enough for a small to medium I/O cluster, but verify total module current draw against the 1 A limit when populating a full rack. Snaps onto both 35 mm and 15 mm DIN rails, matching the standard ET 200SP mounting profile. The 68 mm width occupies one module slot; the 80 mm length and 43.2 mm height fit within the standard enclosure depth for a 19-inch cabinet or small junction box.
Accepts stranded wire from 0.5 to 2.5 mm² (solid equivalent), with finely stranded wire requiring a ferrule at 0.5 to 1.5 mm². The plug-in spring-cage terminals at the top allow pre-wiring of the harness before seating the block onto the I/O bus — a time-saver during panel build or module swap. No shield connection, PE connection, or disconnector on this block — it is a straight-through potential rail. The infeed function means it can be placed at the start of an I/O group to feed the backplane bus voltage; subsequent modules in the group draw from this rail without needing their own infeed block. Operating temperature range of 0 to 60 °C covers most control cabinet environments. The UL 94 V-0 flammability rating on the enclosure material meets the standard for unattended equipment. No end cover plate is required, simplifying ordering for a single-block replacement.