6ES7288-1SR20-0AA1 New Original Siemens S7-200 SMART Plc Programming Controller module

2. Key Selling Points

1. Entry-Level CPU Module for S7-200 SMART:Model SR20, a relay-output CPU in the SIMATIC S7-200 SMART series—designed for small-scale automation and basic logic control applications such as packaging machines, conveyor systems, and electromechanical equipment.

2. Integrated 12 Digital Inputs + 8 Relay Outputs:12 digital inputs (DI): 24 V DC, compatible with pushbuttons, sensors, and limit switches.8 relay outputs (DO): Contact rating of 2A @ 250V AC / 2A @ 30V DC—capable of directly driving medium-power loads such as contactors, solenoid valves, indicator lamps, and small motors, with AC/DC load flexibility.

3. Multiple Communication Interfaces:Equipped with 1 RS485 port supporting MODBUS RTU (master/slave mode).Can be expanded to PROFIBUS-DP slave via the EM DP01 module—ideal for connecting to HMIs, drives, or other PLCs.

4. Basic Motion Control Support:Supports PTO (Pulse Train Output) and PWM (Pulse Width Modulation) for simple positioning or speed control.Maximum pulse frequency up to 100 kHz (on high-speed outputs)—suitable for stepper or servo drive control.

5. Flexible Expandability:Up to 7 signal modules (AI, AQ, DI, DO, RTD, TC) and 2 communication modules (e.g., PROFIBUS, Ethernet) can be added—enabling scalable I/O and functionality expansion.