Siemens 6ES7921-5AK20-0AA0 SIMATIC TOP Connect Front Connector Module 40-Pole S7-1500 PLC Connection Module

The Siemens 6ES7921-5AK20-0AA0 is a front connector module for SIMATIC S7-1500 analog I/O modules, part of the SIMATIC TOP Connect fully modular wiring system. It provides 40 poles across four 16-pole IDC connectors for field cabling, is rated 24V DC (60V DC maximum) at up to 1A per plug-in contact, and mounts in place of the standard front connector on the analog module.

Technical Specifications

Certifications & Standards

• cULus

Selection Notes

The 24V/60V DC rating and 1A per-contact limit size this module for analog I/O signal wiring rather than digital output switching loads — select it specifically for S7-1500 analog modules that use 40-pole front connectors. The 30 m maximum wire length between the front connector module and the terminal module sets the practical cabinet-to-terminal-strip distance when wiring with SIMATIC TOP Connect.

Applications

Used in SIMATIC S7-1500 automation systems where analog I/O modules are pre-wired through SIMATIC TOP Connect terminal modules, typical in panel-built machine control and process instrumentation cabinets where reducing point-to-point field wiring errors matters.