About

Siemens S7-200 Smart SR20 PLC is a cost-effective and high-performance programmable logic controller designed for small to medium-sized automation applications. With its compact design, built-in I/O, and flexible communication options, this PLC is ideal for industries looking for efficient and reliable automation solutions.

Key Features:

• Compact design with integrated digital inputs and outputs for easy installation
• High-speed processing for improved automation efficiency
• Multiple communication interfaces, including Ethernet and RS485
• User-friendly programming with STEP 7 Micro/WIN SMART software
• Reliable performance for industrial automation and process control 

SIMATIC S7-200 SMART CPU SR20

Article No.: 6ES7288-1SR20-0AA0
Description: CPU with AC/DC/Relay, onboard I/O: 12 DI 24 V DC, 8 DO relay 2A, power supply AC 85–264 V, program/data memory 20 KB.

General Information

• Product type: CPU SR20 AC/DC/Relay

• Programming: STEP 7 Micro/WIN SMART

• Mounting: Standard DIN rail

Supply Voltage

• AC rated values: 120 V / 230 V

  • Permissible range: 85 … 264 V

• Line frequency: 47 … 63 Hz

Input Current

• Rated: 170 mA at 240 V AC

• Max: 290 mA at 120 V AC

• Inrush current: 9.3 A at 264 V

Output Current

• Max. 300 mA, 24 V DC Sensor Power

• Backplane bus: Max 1.4 A, 5 V DC for EM bus

Power Loss

• Max. 14 W

Memory

• Type: DDR

• Flash: Yes

• RAM: Yes

• Program memory: 12 KB

• User memory: 8 KB

• Micro Memory Card: Optional microSDHC

• Backup: Maintenance-free, RTC requires 7 days

CPU Performance

• Bit operations: 150 ns / instruction

• Word operations: 1.2 μs / instruction

• Floating point arithmetic: 3.6 μs / instruction

Address Area

• Inputs: 144 bytes (256 DI bits & 56 words AI)

• Outputs: 144 bytes (256 DO bits & 56 words AO)

Digital Inputs

• Number: 12 (6 usable for high-speed counting)

• Type: DC, 24 V, source/sink input

• Input delay (parametrizable): 0.2 … 12.8 ms

• Cable length: Shielded: max. 500 m; Unshielded: max. 300 m

Digital Outputs

• Number: 8 (Relays)

• Switching capacity:

  • Resistive load: max 2 A

  • Lamp load: max 30 W DC, 200 W AC

• Output delay: 0 → 1: max 10 ms, 1 → 0: max 10 ms

• Cable length: Shielded: 500 m; Unshielded: 150 m

Interfaces

• Industrial Ethernet: 1 (PROFINET, isolated 1,500 V AC, 10/100 Mbit/s)

  • Supports PROFINET IO Controller & I-Device

  • Max. connectable IO Devices: 8, Update time: 4 ms

• RS 485: 1 (max 187.5 kbps)

• PROFIBUS DP master: Via CM DP module

• Ethernet protocols: TCP/IP, S7 communication

Integrated Functions

• Counters: 6

• Pulse outputs: 3

• PID controller: Max. 8 loops, continuous and binary outputs

• Forcing: Supported

EMC / Interference Immunity

• Electrostatic discharge: 8 kV air, 4 kV contact (IEC 61000-4-2)

• High-frequency fields: 10 V/m, 80–1,000 MHz (IEC 61000-4-3)

• Cable-borne interference: 2 kV burst (IEC 61000-4-4)

• Conducted high-frequency disturbance: 10 V, 150 kHz – 80 MHz (IEC 61000-4-6)

• Radio interference emission: EN 61000-6-4, Class A (industrial use)

Mechanical / Ambient Data

• IP degree: IP20

• Operating temperature:

  • Horizontal: 0 … 55 °C

  • Vertical: 0 … 45 °C

• Storage/Transport: -40 … 70 °C

• Altitude: -1,000 … +2,000 m

• Dimensions: W 90 mm × H 100 mm × D 81 mm

• Weight: ~367 g

Technical Details