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Siemens 6AG1212-1HE31-2XB0 — PLCs (Programmable Logic Controllers)

Siemens 6AG1212-1HE31-2XB0 SIMATIC S7-1200 CPU, FBD LAD SCL,

MPN6AG1212-1HE31-2XB0

Siemens SIMATIC S7-1200 compact CPU, 6AG1212-1HE31-2XB0, FBD/LAD/SCL, 1 MB integrated memory, -40 to 70°C, 24 V DC isolated, PROFINET, MODBUS TCP/IP, PROFIBUS.

Siemens 6AG1212-1HE31-2XB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1212-1HE31-2XB0 — I/O
ParameterValue
Digital inputs8; Integrated
Digital outputs6; Relays
ExpandableNo
Input data area1 024 byte
Output data area1 024 byte
6AG1212-1HE31-2XB0 — Processor & Memory
ParameterValue
Execution time, bit operations (typ.)0.085 µs; / instruction
Execution time, word operations (typ.)1.7 µs; / instruction
Execution time, floating-point arithmetic (typ.)2.5 µs; / instruction
Size, max.4 kbyte; Size of bit memory address area
6AG1212-1HE31-2XB0 — Programming
ParameterValue
Programming language: FBDYes
Programming language: LADYes
Programming language: SCLYes
6AG1212-1HE31-2XB0 — Electrical
ParameterValue
Rated value (DC)24 V
Current consumption (rated)175 mA; Typical
Permissible range, lower limit (DC)5 V
Permissible range, upper limit (DC)250 V
Power loss (typ.)9 W
Short-circuit protectionNo; to be provided externally
6AG1212-1HE31-2XB0 — Environmental
ParameterValue
Installation altitude, max.2 000 m
Temperature, min.-40 °C
Temperature, max.70 °C
Operating temperature, min. (horizontal mounting)-40 °C; = Tmin (incl. condensation/frost); start-up @ -25 °C
Operating temperature, max. (horizontal mounting)70 °C; = Tmax; > +60 °C Number of simultaneously controllable inputs and outputs max. 50 %; no signal board can be used
Ambient temperature vs. altitude/pressure deratingTmin ... Tmax at 1 140 hPa ... 795 hPa (-1 000 m ... +2 000 m) // Tmin ... (Tmax - 10 K) at 795 hPa ... 658 hPa (+2 000 m ... +3 500 m) // Tmin ... (Tmax - 20 K) at 658 hPa ... 540 hPa (+3 500 m ... +5 000 m); above 2 000 m max. 132 V AC
6AG1212-1HE31-2XB0 — Mechanical
ParameterValue
Width90 mm
Height100 mm
Depth75 mm
Weight (approx.)385 g
6AG1212-1HE31-2XB0 — Communication
ParameterValue
Interface typePROFINET

Product details

CPU 1212C with extended fieldbus suite

The Siemens 6AG1212-1HE31-2XB0 is a SIMATIC S7-1200 compact CPU supporting FBD, LAD, and SCL programming languages. It carries 1 MB of integrated memory (code and data shared) and a typical real-time-clock backup of 480 hours. The ambient operating range spans -40 to 70 °C, suiting it for unheated enclosures or outdoor installation. Communication options are dense: a PROFINET interface (with autocrossing), MODBUS TCP/IP client and server, PROFIBUS DP as client or server, AS-Interface support, and UDP. The PROFINET port doubles as the engineering access point for TIA Portal.

Fieldbus and wiring notes

PROFINET interface: shielded twisted-pair cable up to 100 m. Autocrossing eliminates crossover cable requirements. The CPU supports both PROFIBUS DP variants—client and server—but PROFIsafe is not available on this model. Digital inputs (2-wire sensor compatible) have a signal '0' threshold of 5 V DC at 1 mA and signal '1' of 15 V DC at 2.5 mA. The isolated supply keeps the logic core separate from field-side noise. Dimensions: 90 mm wide × 100 mm high × 75 mm deep. The unit is not expandable (no additional signal modules on the backplane), so all I/O is fixed to the onboard count.

Frequently asked questions

What programming languages does the 6AG1212-1HE31-2XB0 support?

It supports FBD (function block diagram), LAD (ladder logic), and SCL (structured text).

What is the ambient temperature range for this CPU?

The operating range is from -40 °C to 70 °C.

What communication protocols are available on this CPU?

It includes PROFINET, MODBUS TCP/IP (client and server), PROFIBUS DP (client and server), AS-Interface, and UDP.

Is the I/O expandable?

No, the CPU is not expandable with additional signal modules; I/O is fixed to the onboard count.

MPN
6AG1212-1HE31-2XB0