Siemens 6ES7212-1HE40-0XB0 SIMATIC S7-1200 CPU 1212C DC/DC/Relay 8DI/6DO/2AI PLC

The Siemens 6ES7212-1HE40-0XB0 is a SIMATIC S7-1200 CPU 1212C DC/DC/Relay with onboard 8 digital inputs, 6 relay outputs rated 2A, and 2 analog inputs, running on 20.4-28.8V DC. It holds 100KB of integrated work memory, one PROFINET port supporting up to 16 IO devices, and accepts up to 3 communication modules plus 1 signal board and 2 signal modules for expansion.

Technical Specifications

Certifications & Standards

• CE
• UL
• cULus
• FM
• RCM
• KC
• Marine

Selection Notes

The relay outputs on this DC/DC/Relay variant switch up to 2A resistive or 30W/200W lamp loads directly, which suits mixed AC/DC field loads without an external interposing relay — pick a DC/DC/DC CPU instead when the application only drives 24V DC solenoids and needs the relays' faster transistor-output switching speed. With 100KB of work memory and support for up to 16 PROFINET IO devices, the 1212C sits above the 1211C in I/O and expansion headroom but below the 1214C's larger memory and rack capacity — move up the family if the program needs more local I/O slots than 1 signal board plus 2 signal modules allows. The built-in OPC UA server lets this CPU expose process data to SCADA or MES clients without a separate communication processor.

Applications

Used as the controller in small standalone machines and skids needing PROFINET networking, relay-switched field devices, and a couple of analog inputs — packaging stations, conveyor sections, and utility skids with modest I/O counts.