The CPU occupies the standard S7-300 single-width slot: 80 mm wide, 125 mm high, 130 mm deep. It mounts directly on the DIN rail and interfaces with the backplane bus. No expandability is provided beyond the CPU's built-in I/O channels (64 inputs, 64 outputs). Program upload and monitoring use MPI (RS 485) or PROFIBUS via CP. The module supports forcing of I/O and variables—useful during commissioning when verifying logic against real field wiring.
Siemens 6AG1312-5BF04-2AY0 SIPLUS S7-300 CPU, FM 8
MPN6AG1312-5BF04-2AY0
Siemens SIPLUS S7-300 CPU 312 (6AG1312-5BF04-2AY0), firmware FM 8, supports LAD/FBD/SCL/STL/GRAPH/HiGraph, extended temperature range -40 to 70°C, EN 50155 railway compliance.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Digital inputs | 10 |
| Digital outputs | 6 |
| Expandable | No |
| Input data area | 64 |
| Output data area | 64 |
| Parameter | Value |
|---|---|
| Execution time, bit operations (typ.) | 0.1 µs |
| Execution time, word operations (typ.) | 0.24 µs |
| Execution time, floating-point arithmetic (typ.) | 1.1 µs |
| Size, max. | 256 byte |
| Parameter | Value |
|---|---|
| Programming language: FBD | Yes |
| Programming language: LAD | Yes |
| Programming language: SCL | Yes |
| Parameter | Value |
|---|---|
| Rated value (DC) | 24 V |
| Current consumption (rated) | 570 mA |
| Permissible range, lower limit (DC) | 19.2 V |
| Permissible range, upper limit (DC) | 28.8 V |
| Power loss (typ.) | 8 W |
| Short-circuit protection | Yes; Clocked electronically |
| Parameter | Value |
|---|---|
| Installation altitude, max. | 5 000 m |
| Temperature, min. | -40 °C |
| Temperature, max. | 70 °C |
| Ambient temperature vs. altitude/pressure derating | Tmin ... 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) |
| Parameter | Value |
|---|---|
| Width | 80 mm |
| Height | 125 mm |
| Depth | 130 mm |
| Weight (approx.) | 410 g |
| Parameter | Value |
|---|---|
| Interface type | Integrated RS 485 interface |
Product details
Frequently asked questions
What firmware version does this CPU run?
This unit runs firmware version FM 8.
Which programming languages does the 6AG1312-5BF04-2AY0 support?
It supports LAD, FBD, SCL, STL, GRAPH, and HiGraph, as well as STEP 7 V5.5+ or V5.3+ with HSP 203.
What is the operating temperature range and railway rating?
It operates from -40 to 70 °C and is EN 50155 compliant (sections 4, 5, 12; T1, Category 1, Class A/B).
Does this CPU have a CE mark?
Yes, CE marking is listed.
MPN
6AG1312-5BF04-2AY0