Siemens 6ES7212-1HF40-0XB0 S7-1200 CPU 1212FC DC/DC/Relay PLC

The Siemens 6ES7212-1HF40-0XB0 is a SIMATIC S7-1200 CPU 1212FC, a compact PLC with DC/DC/Relay I/O: 8 digital inputs, 6 relay digital outputs (2 A resistive each), and 2 analog inputs (0-10 V) onboard. It runs from 20.4-28.8 V DC, holds 150 KB of integrated program/data memory, and has one isolated PROFINET interface supporting PROFINET IO Controller/Device, OPC UA Server, and PROFIsafe via a communication module.

Technical Specifications

Certifications & Standards

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

Selection Notes

Relay outputs are the deciding factor over a DC/DC/DC 1212 variant: 2 A per contact at up to 200 W AC lamp load lets this CPU switch small AC loads or higher-current DC loads directly, without an external interposing relay, at the cost of a slower switching speed than a transistor output. As with the 1214FC, PROFIsafe support (via a compatible communication module) means the same CPU can carry a safety function alongside standard logic. With only 2 signal-module slots against the 1214's 8, this is the choice for a smaller station where the onboard 8DI/6DO/2AI plus a couple of add-on modules cover the full I/O count - not for a station expected to grow significantly.

Applications

Fits compact machines mixing digital I/O with a handful of AC or higher-current DC loads switched directly from the CPU - small conveyor sections, packaging stations, and skids where a separate output module or interposing relay is not justified.