Siemens 6ES7288-1CR20-0AA1 SIMATIC S7-200 SMART CPU CR20s Controller

6ES7288-1CR20-0AA1 CPU CR20s is a cost-focused fixed-I/O CPU for pumps, fans, conveyors, utility skids and simple standalone machines. It is best when 12 DI and 8 relay outputs cover the complete project and future I/O expansion is not expected.

The 6ES7288-1CR20-0AA1 CPU CR20s provides 8 relay outputs rated 2 A. Check the AC or DC load voltage, contact rating, switching frequency and inrush current; motors, large solenoids and contactors may require an interposing relay or separate protection.

Power the 6ES7288-1CR20-0AA1 CPU CR20s from 85–264 V AC at 47–63 Hz. The onboard digital inputs use 24 V DC, so plan the field supply separately. Siemens specifies approximately 14 W power loss for the 6ES7288-1CR20-0AA1 CPU CR20s.

6ES7288-1CR20-0AA1 CPU CR20s provides 20 KB total program and data memory with a bit execution time of about 150 ns. It also supports four high-speed counters up to 100 kHz, but program size, retained data and communication buffers should be estimated first.

The integrated RS485 port supports PPI, Modbus RTU, USS and free-port communication. 6ES7288-1CR20-0AA1 CPU CR20s has no onboard PROFINET, so an external serial-to-Ethernet gateway is needed for Ethernet-only equipment.

No. The 6ES7288-1CR20-0AA1 CPU CR20s is a fixed, non-expandable CPU and does not support signal modules or a signal board. The enclosure size is approximately 90 × 100 × 81 mm and the 6ES7288-1CR20-0AA1 CPU CR20s weighs about 367 g.

Provide 6ES7288-1CR20-0AA1, the existing nameplate, line voltage, input sensor types, relay load voltage/current/inrush, RS485 protocol, program backup status, quantity, destination and required delivery date.