Product Overview

The Siemens 6ES7288-2DR08-0AA0 is a high-performance digital expansion module specifically engineered for the SIMATIC S7-200 SMART PLC platform. This module, designated as the SM DR08, provides eight independent relay output channels, allowing the controller to interface with diverse field loads. Unlike transistor-based outputs, these mechanical relay contacts offer the versatility to switch both alternating current (AC) and direct current (DC) circuits, providing a robust solution for driving solenoids, contactors, and small motors. Designed for seamless integration, the module mounts directly to the CPU's expansion bus, extending the system's control capabilities while maintaining a compact footprint within the electrical cabinet.

Fundamental Hardware Parameters and Electrical Profile

• Output Configuration: 8 Independent Relay Channels

• Switching Capacity: 2.0 Amperes per contact (max)

• Supply Voltage: 24V DC nominal (allowable range: 20.4V to 28.8V DC)

• Current Consumption: Typically 80mA at 24V DC / 90mA at 5V DC (backplane)

• Safety Features: Integrated reverse polarity protection on the power supply

• Load Compatibility: Supports both AC and DC load switching

• Physical Mass: 0.54 kg (Net) / 0.95 kg (Package weight)

• Module Dimensions: 175 x 100 x 80 mm (standardized for S7-200 SMART series)

• Mounting Type: 35mm DIN Rail or Panel Mount

• Country of Manufacture: Germany

• HS Code: 8537101190

Industrial Deployment and Control Applications

The 6ES7288-2DR08-0AA0 is a fundamental component for automation tasks requiring isolated and high-current switching. Its primary deployment scenarios include:

• Material Handling and Logistics: Controlling the start/stop sequences of conveyor motors and pneumatic diverters in sorting facilities.

• Packaging and Bottling: Managing the actuation of heating elements, capping solenoids, and labeling machinery.

• Building Automation: Interfacing with HVAC dampers, lighting contactors, and alarm systems where voltage isolation is critical.

• Automated Assembly Systems: Executing multi-device coordination in assembly cells, where the PLC must trigger various 230V AC or 24V DC actuators simultaneously.

• Retrofit Engineering: Expanding existing S7-200 SMART stations to accommodate additional field devices without requiring a complete controller upgrade.