Siemens 6ES5700-1SA11: SIMATIC S5 Central Mounting Rack

Physical Dimensions and Mechanical Construction

The Siemens 6ES5700-1SA11 holds S5 modules in a rigid industrial enclosure. This rack measures 250mm in height, 483mm in width, and 160mm in depth. You can mount this unit in a standard 19-inch industrial cabinet using four screws. The rack weighs 2.8 kilograms , requiring two people for safe installation.

Internal Architecture and Slot Configuration

The Siemens 6ES5700-1SA11 contains 8 module slots arranged in a single horizontal row. Each slot has 34 gold-plated backplane connectors for module communication. The backplane includes bus termination resistors at both ends for signal integrity. Additionally, the rack provides keying guides that prevent incorrect module insertion.

Power Distribution and Bus Structure

This mounting rack distributes 5V DC power to all installed modules simultaneously. The backplane carries parallel address and data buses for fast module communication. Each slot receives up to 2 amperes from the central power supply unit. Consequently, you can mix various module types without power distribution concerns.

Interface and Connectivity Features

The Siemens 6ES5700-1SA11 provides one 20-pin bus extension connector on the right side. A matching 20-pin connector on the left allows rack-to-rack connections. You will also find four mounting holes for 19-inch cabinet installation. Each module slot includes two guide rails for smooth module insertion.

Slot Usage and Module Placement

Slot 1 must contain the power supply unit for the entire rack assembly. Slots 2 through 8 accept any S5-115U I/O or CPU modules as needed. You can install up to 7 I/O modules in a fully populated configuration. The rack automatically assigns slot-based addresses without any DIP switch settings.

Bus Extension and System Expansion

You can connect multiple Siemens 6ES5700-1SA11 racks using extension cables. The rack-to-rack connection uses 6ES5700-1AA11 bus cables up to 100 meters long. You can connect up to 4 racks in a single daisy-chain configuration. Consequently, you can achieve up to 28 I/O slots per controller system.

Mechanical Features and Construction

This rack uses powder-coated steel for durability in industrial environments. The backplane consists of a four-layer PCB for reduced crosstalk. Module guides include spring contacts that ensure proper grounding of each module. Additionally, the rack has cable management channels on both sides for organized wiring.

Diagnostic and Status Features

The Siemens 6ES5700-1SA11 has no active electronics or LEDs on the backplane. However, the power supply unit provides bus status monitoring through its front panel. The rack includes test points for measuring 5V and 24V on the backplane. You can access these test points without removing any modules from the rack.

Installation and Clearance Requirements

You must maintain 100mm clearance above and below the rack for airflow. Use M6 screws to secure the rack to 19-inch cabinet rails. Tighten mounting screws to 5 Nm torque for vibration-resistant installation. The rack requires no additional grounding beyond the cabinet connection.

Environmental Specifications and Compliance

You can operate this mounting rack from 0°C to 60°C ambient temperature without derating. Storage temperature ranges from -20°C to 70°C for long-term preservation. Non-condensing humidity tolerance spans 10% to 95% for industrial environments. This rack meets DIN 41494 and IEC 297 standards for 19-inch racks.