Connection Module for S7-300 Potential Supply
The Siemens 6ES7924-1AA10-0AA0 is a TPK connection module designed for the SIMATIC S7-300 I/O system, providing 2x8 channels with 2x2x2 screw-type terminals for potential supply distribution. Its infeed function allows it to serve as the power feed point for the module rack, carrying a rated current of 1 A at 60 V. This is the part you need when the BOM calls for a screw-terminal potential supply module without LEDs — it feeds the bus and distributes 24 V or 48 V DC to the downstream I/O modules. Mounts on standard 35 mm DIN rail or the narrower 15 mm rail, with dimensions of 100 mm wide by 80 mm long by 43.2 mm high. No shield connection, no PE connection, and no disconnector — this is a pure potential distribution block, not a fused or switched feed.
Snaps onto DIN rail — 35 mm is the standard, but the 15 mm variant is useful in shallow enclosures or retrofit panels where rail depth is tight. The black enclosure carries a UL 94 V-1 flammability rating. The plug-in connection for the cable harness (2x16-pole IDC connector) mates to the S7-300 backplane bus; the screw terminals on top take the field-side potential wiring. No end cover plate is required, so it sits flush at the end of the module row.