Siemens 6ES7212-1HG50-0XB0 SIMATIC S7-1200 CPU 1212C DC/DC/RLY 8DI 6DO PLC

The Siemens 6ES7212-1HG50-0XB0 is a SIMATIC S7-1200 CPU 1212C DC/DC/RLY compact controller with 8 integrated 24 V DC digital inputs, including high-speed counting up to 100 kHz, and 6 relay outputs rated 2 A resistive, 150 KB program memory plus 500 KB data memory, and a built-in 2-port PROFINET switch. Load memory is 8 MB integrated, expandable via SD card up to 32 GB, with 37 ns typical bit-operation processing time.

Technical Specifications

Certifications & Standards

• CE mark
• UL approval
• cULus
• RCM
• KC approval
• Marine approval

Selection Notes

The 1212C's 6 relay outputs switch loads up to 2 A resistive or 200 W AC lamp loads directly, useful where the panel has motor starters or contactor coils that a transistor output can't drive without an interposing relay; the DC/DC/DC 1212C variant trades that for faster transistor switching at low-voltage loads. Program memory tops out at 150 KB, so it fits machine-level logic and single-cell HMI communication rather than large multi-station lines needing a CPU with more work memory. Two integrated PROFINET ports with switch let it daisy-chain to the next device on the line without an external Ethernet switch.

Applications

Fits standalone machine control, single-cell automation, and small skid packages where relay outputs drive contactors and the SD card interface is used for firmware updates or recipe storage.