Features:
- Sixteen physical inputs can be assigned individually as single-channel points or combined into eight two-channel evaluations.
- Selectable input filtering lets the project balance response time against the documented cable-screening boundary.
- The safety architecture supports SIL 2 in single-channel use and SIL 3 in a valid two-channel arrangement.
The a.x and b.x naming scheme keeps each possible two-channel pair visible during configuration instead of treating all sixteen terminals as unrelated points.
A 0.8 ms filter setting requires shielded conductors for both digital inputs and sensor supply, so timing selection directly affects field wiring.
Input LEDs provide local state feedback while the PROFIsafe configuration carries the evaluated safety information to the S7-1200 controller.
The Siemens 6ES7226-6BA32-0XB0 SIMATIC S7-1200 SM 1226 F-DI Module may be available for purchase and support from Apter Power.
Siemens 6ES7226-6BA32-0XB0 S7-1200 SM 1226 F-DI Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Assigning a.x and b.x inputs
- Single-Channel Choice: An a.x or b.x point can be evaluated independently as a 1oo1 input.
- Two-Channel Choice: The matching a.x/b.x pair can be combined into one 1oo2 safety input.
- Per-Pair Setting: Each pair on 6ES7226-6BA32-0XB0 is assigned separately in the module configuration.
- Capacity Result: The selected pattern determines whether the module presents sixteen single points or eight paired evaluations.
Filter choice and field wiring
- Delay Selection: Five parameterized filter times let the input response be matched to the signal behavior.
- Fastest Setting: Selecting 0.8 ms introduces the documented shielding requirement.
- Sensor Supply: At the fastest filter, the sensor-supply cable must be shielded together with the digital-input cable.
- Run Length: The field connection remains within the specified 200 m cable boundary.
Separating local state from safety evaluation
- Input Indication: Front LEDs show the current state of the individual digital inputs.
- Pair Context: The project configuration identifies whether a lit point belongs to a 1oo1 channel or one side of a 1oo2 pair.
- Module Context: Diagnostic handling remains associated with the SM 1226 F-DI module inside the S7-1200 station.
- PROFIsafe Route: Safety-related input information is transferred through the configured PROFIsafe path.
How channel structure changes the limit
- One-Channel Limit: A single-channel 6ES7226-6BA32-0XB0 evaluation is specified to Category 3, PL d and SIL 2.
- Two-Channel Limit: A valid paired evaluation can reach Category 3 or 4, PL e and SIL 3.
- Configuration Dependency: The higher classification depends on using the two-channel structure rather than merely installing the module.
- Input Assignment: Safety planning must therefore match the a.x/b.x pairing to the intended evaluation architecture.