Siemens 6ES5923-3UA11 Coordinator Module

Engineered for SIMATIC S5 Multi-Rack Expansion

This module manages communication between multiple S5 racks. It coordinates data exchange for the Siemens 6ES5923-3UA11 unit. You will find this coordinator card in large SIMATIC S5 configurations. Unlike basic connectors, this version handles up to four expansion racks. It synchronizes I/O access across the entire system.

Technical Specifications & Physical Dimensions

We designed this coordinator module for complex multi-rack systems. The table below presents all verified technical specifications.

Parameter	Specification
Physical Dimensions (W x H x D)	160mm x 125mm x 50mm
Total Weight	0.55 kg (550 grams)
Maximum Racks Supported	4 total (1 central + 3 expansion)
Maximum I/O Slots	32 slots across all racks
Interface Type	20-pin ribbon cable connection
Maximum Cable Length	10 meters between racks
Operating Voltage	5V DC (from backplane)

Functional Architecture and Data Routing

This coordinator module sits in the central rack of an S5 system. It uses a 20-pin ribbon cable to connect expansion racks. You can place expansion racks up to 10 meters away. Moreover, the module includes bus driver circuits for signal amplification. These components maintain signal integrity over long distances. Consequently, the board enables large distributed I/O configurations without performance loss.

Installation and Operational Guidelines

The Siemens 6ES5923-3UA11 requires termination on the last expansion rack. It introduces less than 10 nanoseconds of propagation delay per meter. You must install this module in slot 1 of the central rack. Always use original Siemens interface cables for connections. This practice ensures proper shielding and signal timing. Furthermore, the module supports automatic rack addressing via DIP switches. This feature simplifies system configuration and troubleshooting.

Physical Characteristics and Environmental Limits

This coordinator module has a rugged, industrial-grade plastic housing. Its substantial 0.55 kg weight reflects the multi-rack processing capability. The layout follows Siemens standard S5 module specifications. Therefore, it fits securely into any SIMATIC S5 central rack. The module requires one slot width for installation. In addition, it maintains stable operation between 0°C and 60°C ambient temperature. You can store this unit safely between -40°C and 85°C.