What it is and where it fits
The Siemens 6ES7924-2CC20-0AC0 is a connection module designed for the SIMATIC S7-1500 system, specifically intended for analog I/O modules. It provides 72 push-in terminals in a single level, arranged at the top of the enclosure, for wiring field signals to the backplane. Rated at 24 V DC and 1 A, it includes an infeed function for distributing power to connected modules — useful for keeping the 24 V bus clean without a separate distribution block. Mounts on either 35 mm or 15 mm DIN rail, in any position, which gives flexibility in crowded cabinets where rail profiles vary.
Wiring and termination details
Push-in terminals accept stranded wire from 0.2 to 2.5 mm² — typical for analog signal loops (4-20 mA, thermocouple, RTD). Up to two wires per connection are allowed, with the cross-section sum limited by ferrule capacity. The maximum wire length between the front connector module and this connection module is 30 m, which covers most panel-to-field junction box runs. No shield connection or PE connection is integrated on this module — shield grounding must be handled at the field device or via a separate terminal block.
Lifecycle and sourcing posture
For a BOM freeze or a new panel design, this module is a straightforward line item. It quotes to order against an RFQ with typical Siemens lead times; no broker or surplus channel needed.
Environmental and compliance notes
Operating temperature range is 0 to 60 °C, storage from -40 to +70 °C. Pollution degree 2 and overvoltage category II — suitable for clean, controlled environments like control cabinets with basic transient protection. Enclosure is grey, dimensions 130 mm wide × 76 mm high × 60 mm deep. Flammability rating UL 94 V1. No end cover plate required.