The Siemens 6ES7288-2DR08-0AA0 is an 8-channel relay output expansion module for S7-200 SMART PLCs. It supports 2A switching for AC/DC loads.
The Siemens 6ES7288-2DR08-0AA0 is a dedicated expansion module for the SIMATIC S7-200 SMART PLC series. This unit adds eight independent relay outputs to the controller for versatile load management. It effectively bridges the gap between low-voltage control logic and high-power industrial equipment. Consequently, users can switch both AC and DC loads using a single, compact hardware component.
This digital output module integrates perfectly with the S7-200 SMART backplane bus. It features robust electrical isolation to protect the CPU from field-side electrical interference. Furthermore, the German-engineered design ensures long-term durability in demanding automation environments. It serves as a reliable interface for modern manufacturing systems and assembly lines.
| Feature | Specification Details |
| Brand | Siemens |
| Product Series | SIMATIC S7-200 SMART |
| Model Number | 6ES7288-2DR08-0AA0 (EM DR08) |
| Output Type | 8 Relay Outputs |
| Switching Capacity | 2.0 Amps per channel |
| Input Voltage | 24 V DC (Permissible range 20.4–28.8 V) |
| Current Consumption | 90 mA from backplane (5V) / 80 mA (24V) |
| Dimensions | 45 x 100 x 81 mm (Approximate) |
| Net Weight | 0.16 kg (Actual unit weight) |
The SM DR08 module utilizes eight high-quality dry contact relay outputs. Each channel supports a current rating of up to 2A for various devices. This allows the PLC to control solenoid valves, contactors, and small motors directly. Therefore, engineers do not always require external interposing relays for standard industrial loads.
Siemens includes integrated reverse polarity protection for the 24V DC supply. This safeguard prevents hardware damage during installation or wiring errors. Additionally, the module maintains electrical separation between the internal logic and external circuits. As a result, the system remains stable even during field-side electrical faults.
The hardware design supports easy mounting on standard DIN rails. It connects to the CPU via a simple slide-in ribbon cable connector. This modular approach allows for rapid system expansion as project requirements grow. Moreover, the compact form factor minimizes the total footprint within the electrical control cabinet.
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