The Siemens 6ES7921-4BF00-0AB1 is a pre-assembled front connector for SIMATIC S7-400 analog I/O modules. It comes with four round cables, each 0.14 mm², terminated at 5 m length, and mates to the 48-pole front connector of the analog module. Rated at 60 V, 1 A per contact, with a total current limit of 2 A across the assembly. The 24 V DC rail is the typical loop supply for the analog channels.
Mounts directly to the S7-400 analog module — no end cover plate required. The cable exits at the top of the connector. Braided shield for noise immunity on analog signals. Screw-type terminals on the cable end for field wiring. Operating temperature range 0 to 60 °C; storage from -30 to +70 °C. Pollution degree 2, overvoltage category II.
Black enclosure, transparent cover not available. Insulating body material is not standard thermoplastic (listed as 'other'). No EEx e tested design. The cable is directly connected to the first interface — no intermediate connector.