Front connector for SIMATIC S7-300 40-pin (6ES7921-3AH20-0AA0) with 40 individual wires 0.5 mm2, individual wires H05V-K, crimp version PU=1 piece. L = 2.5 m The pre-assembled 40-pin front connector with 40 individual wires of type H05V-K, conductor cross-section 0.5 mm², with a length of 2.5 m in spring-loaded design is intended for connection to a digital I/O module of the SIMATIC S7-300. This is plugged into the module to be wired instead of the front connector. This allows the signals of the digital I/O module to be easily connected to the elements to be wired via the numbered individual wires. This front connector with individual wires is part of the flexible connection of SIMATIC TOP connect for the fastest and safest system cabling. In addition to a 50% reduction in wiring effort, sources of errors in cabling can be significantly reduced.