Siemens 6ES5760-0AA11 Terminating Connector

Bus Termination for S5 Communication Networks

The Siemens 6ES5760-0AA11 terminating connector ensures proper signal reflection control on S5 bus systems. This connector attaches to the end of communication cables to prevent data corruption in long network runs. Reliable fieldbus networks require correct termination, and this component delivers that functionality consistently.

Electrical Characteristics and Termination Circuit

This terminating connector contains a 120-ohm resistor network that matches the characteristic impedance of RS-485 cables. The connector also includes biasing resistors to maintain a defined idle state on the bus lines. An integrated surge suppression circuit protects connected devices from voltage spikes. Furthermore, the connector provides a feed-through path for uninterrupted daisy-chain configurations.

Parameter	Specification
Model	Siemens 6ES5760-0AA11
Termination Resistor	120 Ω (±1%)
Biasing Resistors	470 Ω (pull-up/down)
Surge Protection	TVS diode, 15 V
Connector Type	9-pin D-sub (male)
Cable Compatibility	RS-485 (twisted pair)
Impedance Matching	120 Ω (nominal)
Operating Temperature	0°C to 60°C
Dimensions (W x H x D)	35 mm x 15 mm x 40 mm
Weight	0.03 kg
Compatible Networks	S5 bus, PROFIBUS (RS-485)

Mechanical Design and Connection Interface

This terminating connector features a sturdy 9-pin D-sub male housing with metal shielding. The connector’s compact dimensions allow installation in tight cable conduit spaces. A locking screw mechanism secures the connection against vibration-related loosening. The molded strain relief protects the cable entry point from mechanical stress and bending.

Signal Integrity and Network Performance

The Siemens 6ES5760-0AA11 eliminates signal reflections that cause data errors in long cable segments. Proper termination reduces electromagnetic emissions and improves noise immunity significantly. The biasing resistors maintain a stable logic level when all transmitters are inactive. Consequently, this connector enhances overall network reliability in electrically noisy industrial environments.

Installation Guidelines and Best Practices

You should install this terminating connector at both ends of each bus segment. For short cable runs under 50 meters, termination at the master device alone may suffice. Always use this connector only on the final device of each network branch. The connector requires no external power supply for proper operation. Install the device with the indicated orientation to access the termination switch.

Compatibility and System Integration

This terminating connector works with all Siemens S5 systems that use RS-485 fieldbus interfaces. The connector also suits PROFIBUS networks operating at speeds up to 1.5 Mbps. You can use this component with both central controller and remote I/O station configurations. For mixed networks, verify that all devices share the same communication parameters. The connector comes with a cable gland suitable for 6 mm to 10 mm cable diameters.