Siemens S7-200 SR20 PLC - Brief Overview
Product Description
The S7-200 SR20 is a compact, cost-effective micro PLC from Siemens' discontinued S7-200 series, designed for small-scale automation tasks.
Key Features
✅ Integrated I/O:
12 digital inputs (24V DC)
8 relay outputs (2A @ 230V AC/30V DC)
✅ Performance:
12 KB program memory
4 high-speed counters (up to 30 kHz)
2 pulse outputs (20 kHz for PWM/PTO)
✅ Communication:
1 × RS-485 port (PPI/MPI protocol)
Supports expansion modules (PROFIBUS, analog I/O)
✅ Power Options:
85–264V AC or 24V DC supply
Typical Applications
Small machines (packaging, conveyors)
Building automation (HVAC, lighting)
Replacement for relay-based control
