Siemens 6ES5762-2AA12 Bus Connector

This connector links multiple S5 racks together for expanded I/O capacity. The Siemens 6ES5762-2AA12 attaches to the bus cable between central and expansion racks. It measures 45 mm in width and 35 mm in height. This unit weighs approximately 50 grams for simple field installation.

Technical Specifications Table

Parameter	Value
Product Model	Siemens 6ES5762-2AA12
Category	Bus Connector / Interface Adapter
Connector Type	1 x 9-pin female SUB-D
Cable Connection	Screw terminal block (3 pins)
Terminal Wire Size	0.5 mm² to 2.5 mm² (AWG 20-14)
Dimensions (W x H x D)	45 mm x 35 mm x 20 mm
Weight	50 g
Internal Components	1 x PCB with gold-plated traces
Terminal Screws	3 x M3 stainless steel
Housing Material	ABS plastic, gray color
Shield Connection	Integrated ground clamp for cable shield
Energy Storage	None (passive component)
Maximum Cable Length	100 meters per segment
Operating Temperature	-20°C to 70°C

Internal Design and Signal Routing

This bus connector routes three core signals through a small PCB. The Siemens 6ES5762-2AA12 connects the A, B, and shield lines of the Siemens bus cable. Gold-plated traces minimize signal loss and prevent corrosion over time. An integrated ground clamp secures the cable shield for noise rejection. The ABS plastic housing protects the internal PCB from dust and impact. This passive component introduces no signal delay or active termination.

Installation and Wiring Guide

First, strip your bus cable outer jacket back by 30 mm carefully. Next, connect the A core wire to terminal 1 and the B core to terminal 2. Then, attach the shield drain wire to the integrated ground clamp. Tighten each M3 screw firmly to secure the wire connection. Plug the 9-pin SUB-D connector into the rack interface port. You can mount this connector at any point along the bus cable. This unit works with all SIMATIC S5 racks including 115U, 135U, and 155U models. Always terminate both ends of the bus cable with proper terminating resistors.