Siemens 6ES5750-2AA21 D-sub Connector

The Siemens 6ES5750-2AA21 D-sub connector terminates communication cables for SIMATIC S5 systems. This connector provides reliable signal transmission between S5 CPUs and programming devices. It attaches directly to the AS511 interface on S5 processors. You can use this connector as a direct replacement for worn or damaged units.

Detailed Technical Specifications

The Siemens 6ES5750-2AA21 D-sub connector measures 31 mm in length. Its width reaches 17 mm across the main body. The total height goes up to 38 mm including the cable strain relief. This unit weighs approximately 0.03 kilograms for easy handling.

Key hardware parameters include:

Complete Model: Siemens 6ES5750-2AA21
Connector type: D-sub miniature (9-pin)
Gender: Male (plug)
Contact count: 9 pins (solder cup type)
Contact plating: Gold over nickel
Current rating: 3 A per contact maximum
Voltage rating: 250 V AC/DC
Contact resistance: <20 mΩ
Insulation resistance: >1000 MΩ
Cable entry: 6 mm diameter maximum
Strain relief: Screw-type clamp
Housing material: Metal with zinc plating
Operating cycles: 500 insertion/removal cycles

The Siemens 6ES5750-2AA21 D-sub connector stores no electrical charge whatsoever. Therefore, technicians can handle the connector without any safety precautions. The metal housing provides excellent electromagnetic shielding. Moreover, the solder cups accept wire sizes from 28 AWG to 22 AWG.

Technical Parameter	Specification
Full Model Number	Siemens 6ES5750-2AA21
Length	31 mm
Width	17 mm
Height (with strain relief)	38 mm
Weight	0.03 kg
Connector Type	D-sub miniature
Gender	Male (9-pin)
Contact Plating	Gold over nickel
Current Rating	3 A per contact
Voltage Rating	250 V AC/DC
Contact Resistance	<20 mΩ
Insulation Resistance	>1000 MΩ
Max Cable Diameter	6 mm
Housing Material	Zinc-plated metal
Operating Cycles	500 insertions

Application and Installation

The Siemens 6ES5750-2AA21 D-sub connector attaches to AS511 programming cables. This connector mates with the 9-pin female port on S5 CPUs and OP panels. It requires soldering of individual wires to each pin. Consequently, you can build custom-length communication cables for your specific installation.

Assembly and Reliability

This connector includes a durable screw-type strain relief for cable security. The Siemens 6ES5750-2AA21 features a metal shell for noise immunity. You can solder each contact using standard 60/40 tin-lead solder. Therefore, field repairs of damaged cables become quick and cost-effective.

Always verify the pinout diagram before soldering any wires. Tighten the strain relief screws firmly after cable insertion. The connector includes jack posts for locking to the mating port. Furthermore, its metal construction withstands repeated plugging cycles in industrial environments