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Siemens 6AG1211-1HE31-4XB0 — PLCs (Programmable Logic Controllers)

Siemens 6AG1211-1HE31-4XB0 PLC, 1 MB Work Memory, PROFINET

MPN6AG1211-1HE31-4XB0

Siemens 6AG1211-1HE31-4XB0 PLC, 1 Mbyte integrated work memory, PROFINET interface, 24 V DC (20.4-28.8 V), FBD/LAD/SCL programming, -40 to 70 °C, 90 x 100 x 75 mm.

Siemens 6AG1211-1HE31-4XB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1211-1HE31-4XB0 — I/O
ParameterValue
Digital inputs6; Integrated
Digital outputs4; Relays
ExpandableNo
Input data area1 024 byte
Output data area1 024 byte
6AG1211-1HE31-4XB0 — 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
6AG1211-1HE31-4XB0 — Programming
ParameterValue
Programming language: FBDYes
Programming language: LADYes
Programming language: SCLYes
6AG1211-1HE31-4XB0 — Electrical
ParameterValue
Rated value (DC)24 V
Current consumption (rated)300 mA; Typical
Permissible range, lower limit (DC)20.4 V
Permissible range, upper limit (DC)28.8 V
Power loss (typ.)8 W
Short-circuit protectionNo; to be provided externally
6AG1211-1HE31-4XB0 — Environmental
ParameterValue
Installation altitude, max.2 000 m
Temperature, min.-40 °C
Temperature, max.70 °C
Operating temperature, min. (horizontal mounting)-20 °C; = Tmin (incl. condensation/frost); start-up @ 0 °C
Operating temperature, max. (horizontal mounting)60 °C; = Tmax
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
6AG1211-1HE31-4XB0 — Mechanical
ParameterValue
Width90 mm
Height100 mm
Depth75 mm
Weight (approx.)380 g
6AG1211-1HE31-4XB0 — Communication
ParameterValue
Interface typePROFINET

Product details

PLC with 1 MB work memory and PROFINET onboard

The Siemens 6AG1211-1HE31-4XB0 is a compact PLC with 1 Mbyte of integrated work memory — enough for moderate-size control logic without an external memory card. It runs on 24 V DC with a permissible range of 20.4 V to 28.8 V, so it tolerates the sag you see on a long field cable run or a shared power supply. The onboard PROFINET interface handles both client and server roles, with automatic cross-over detection for direct connection to a programming PC or another controller. It also supports PROFIBUS, MODBUS, TCP/IP, and AS-Interface, covering most plant-floor network topologies without an extra communication module.

Programming languages and I/O addressing

This CPU supports FBD, LAD, and SCL — the three IEC 61131-3 languages that cover ladder-logic maintenance, function-block process control, and structured-text data handling. If your site engineers work in one language only, the CPU accepts any mix; no license restrictions per language. The I/O address space is 1 024 bytes each for inputs and outputs, which maps to about 64 digital modules at 16 channels each, or a mix of analog and digital cards. Forcing of inputs and outputs is supported — useful during commissioning when you need to override a sensor value without rewiring.

Environmental range and backup retention

Rated for -40 °C to 70 °C ambient, this PLC can sit in an unheated warehouse or a rooftop cabinet without a heater. The typical backup time of 480 hours keeps the program and retentive data alive during a weekend power outage — the capacitor-backed real-time clock and SRAM hold without a battery. Dimensions are 90 mm wide, 100 mm high, 75 mm deep — it mounts on a standard DIN rail and leaves room alongside for a 4-channel analog module or a small remote I/O slice. The depth is shallow enough that the gland plate clearance is rarely an issue.

Sourcing and lifecycle status

This is the Siemens S7-1200 series in the 6AG1 SIPLUS variant, which adds extended temperature range and conformal coating for harsh environments.

Frequently asked questions

Will 6AG1211-1HE31-4XB0 drop into a panel specified around 6ES7211-1HE31-0XB0 without rewiring?

The 6AG1211-1HE31-4XB0 shares the same 90 x 100 x 75 mm footprint and PROFINET interface as the standard 6ES7211-1HE31-0XB0, so mechanical fit and network wiring are identical. The key difference is the extended temperature range (-40 °C vs the standard's 0 °C minimum) — if the panel environment never drops below freezing, the standard unit is functionally interchangeable, but a customer AVL that specifies the SIPLUS variant requires a written deviation to substitute.

What compliance documentation does Siemens provide for 6AG1211-1HE31-4XB0?

The evidence does not list specific compliance certificates (RoHS, REACH, UL, IEC) for this order code. Standard Siemens S7-1200 products carry CE, UKCA, and cULus markings; the SIPLUS variant typically adds the same certifications plus the extended-temperature rating. Confirm the exact documentation package with the supplier at RFQ.

MPN
6AG1211-1HE31-4XB0