Programmable Logic Controller Guide: Selection, Application, and Maintenance for Engineers
PLC selection guide for engineers covering IEC 61131 compliance, Siemens, Rockwell, Schneider, ABB comparison, scan time sizing, and wiring. Shop at Stoklink.
The Siemens 6ES7223-1BL32-0XB0 is a SIMATIC S7-1200 digital I/O module, SM 1223, combining 16 sink/source 24 V DC inputs with 16 transistor outputs rated 0.5 A each. It mounts alongside an S7-1200 CPU, draws 185 mA from the 5 V backplane bus, and the IEC 61131 type 1 inputs run parameterizable delays from 0.2 to 12.8 ms.
The transistor outputs on this SM 1223 have no built-in short-circuit protection, so each output circuit needs external fusing or protection sized to the 0.5 A rated current - unlike a relay-output SM 1223 variant, which trades that protection gap for lower switching speed and no polarity restriction. Sink/source input wiring means the same module accepts PNP or NPN field sensors without ordering a different I/O type. At 4.5 W typical power loss and 185 mA drawn from the CPU's 5 V backplane bus, check the CPU's remaining backplane budget before stacking multiple SM 1223 modules on one rack.
Expands a SIMATIC S7-1200 CPU with 16 additional 24 V DC digital inputs and 16 transistor outputs for machine I/O - pushbuttons, limit switches, valve coils, indicator lamps - where the CPU's onboard I/O count is insufficient.
| Product type designation | SM 1223, DI 16x24 V DC, DQ 16x24 V DC |
|---|
| Rated value (DC) | 24 V |
|---|---|
| permissible range, lower limit (DC) | 20.4 V |
| permissible range, upper limit (DC) | 28.8 V |
| from backplane bus 5 V DC, max. | 185 mA |
|---|---|
| Digital inputs: from load voltage L+ (without load), max. | 4 mA; per channel |
| Part number | 6ES7223-1BL32-0XB0 |
|---|---|
| Type designation | SM 1223, DI 16x24 V DC, DQ 16x24 V DC |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 6940408102002 |
| ETIM class | EC001419 |
| eCl@ss | 27242204 |
| Power supply to the transmitters: present | Yes |
|---|
| Power loss, typ. | 4.5 W |
|---|
| Number of digital inputs | 16 |
|---|---|
| in groups of | 2 |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes |
| Number of simultaneously controllable inputs all mounting positions: up to 40 °C, max. horizontal installation | 16 |
| Input voltage: Rated value (DC) | 24 V |
| Input voltage: for signal "0" | 5 V DC at 1 mA |
| Input voltage: for signal "1" | 15 V DC at 2.5 mA |
| Input current: for signal "0", max. (permissible quiescent current) | 1 mA |
| Input current: for signal "1", min. | 2.5 mA |
| Input current: for signal "1", typ. | 4 mA |
| Input delay (for rated value of input voltage) for standard inputs: parameterizable for interrupt inputs | Yes; 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four |
| Cable length: shielded, max. | 500 m |
| Cable length: unshielded, max. | 300 m |
| Number of digital outputs | 16 |
|---|---|
| in groups of | 1 |
| Short-circuit protection | No; to be provided externally |
| Limitation of inductive shutdown voltage to Switching capacity of the outputs | L+ (-48 V) |
| with resistive load, max. | 0.5 A |
| on lamp load, max. | 5 W |
| Output voltage: Rated value (DC) | 24 V |
| Output voltage: for signal "0", max. | 0.1 V; with 10 kOhm load |
| Output voltage: for signal "1", min. | 20 V DC |
| Output current: for signal "1" rated value | 0.5 A |
| Output current: for signal "1" permissible range, max. | 0.5 A |
| Output current: for signal "0" residual current, max. | 10 µA |
| Output delay with resistive load: "0" to "1", max. | 50 µs |
| Output delay with resistive load: "1" to "0", max. | 200 µs |
| Total current of the outputs (per group) horizontal installation: up to 50 °C, max. | 8 A; Current per mass |
| Relay outputs Switching capacity of contacts: with inductive load, max. | 0.5 A |
| Relay outputs Switching capacity of contacts: on lamp load, max. | 5 W |
| Relay outputs Switching capacity of contacts: with resistive load, max. | 0.5 A |
| Cable length: shielded, max. | 500 m |
| Cable length: unshielded, max. | 150 m |
| Alarms: Diagnostic alarm | Yes |
|---|---|
| Diagnostics indication LED: for status of the inputs | Yes |
| Diagnostics indication LED: for status of the outputs | Yes |
| Potential separation digital inputs: between the channels, in groups of | 2 |
|---|---|
| Potential separation digital outputs: between the channels, in groups of | 1 |
| Potential separation digital outputs: between the channels and backplane bus | 500 V AC |
| IP degree of protection | IP20 |
|---|
| CE mark | Yes |
|---|---|
| CSA approval | Yes |
| UL approval | Yes |
| cULus | Yes |
| FM approval | Yes |
| RCM (formerly C-TICK) | Yes |
| KC approval | Yes |
| Marine approval | Yes |
| Ecological footprint: environmental product declaration Global warming potential | Yes |
| Ecological footprint: global warming potential, (total) [CO2 eq] | 123 kg |
| Ecological footprint: global warming potential, (during production) [CO2 eq] | 12.1 kg |
| Ecological footprint: global warming potential, (during operation) [CO2 eq] | 111 kg |
| Ecological footprint: global warming potential, (after end of life cycle) [CO2 eq] | -0.434 kg |
| Free fall: Fall height, max. | 0.3 m; five times, in product package |
|---|---|
| Ambient temperature during operation: min. | -20 °C |
| Ambient temperature during operation: max. | 60 °C |
| Ambient temperature during operation: horizontal installation, min. | -20 °C |
| Ambient temperature during operation: vertical installation, min. | -20 °C |
| Ambient temperature during operation: permissible temperature change | 5°C to 55°C, 3°C / minute |
| Ambient temperature during storage/transportation: min. | -40 °C |
| Ambient temperature during storage/transportation: max. | 70 °C |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, min. | 660 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, max. | 1 080 hPa |
| Relative humidity: Operation at 25 ℃ without condensation, max. | 95 % |
| required front connector | Yes |
|---|
| Enclosure material (front): Plastic | Yes |
|---|
| Width | 70 mm |
|---|---|
| Height | 100 mm |
| Depth | 75 mm |
| Weight, approx. | 310 g |
|---|
| Net weight | 0.28 kg |
|---|---|
| Country of origin | DE |
| Shipping weight | 0.78 kg |
| Ships from | Türkiye |
| Dispatch | 12 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
No documents are on file for this part yet.
Ask us for the datasheetThe rated current of SM 1223, DI 16x24 V DC, DQ 16x24 V DC is 0.5 A.
The rated operational voltage of SM 1223, DI 16x24 V DC, DQ 16x24 V DC is 24 V AC.
The tariff (HS) code on file for SM 1223, DI 16x24 V DC, DQ 16x24 V DC is 85389091.
The EAN (GTIN) of SM 1223, DI 16x24 V DC, DQ 16x24 V DC is 6940408102002.
SM 1223, DI 16x24 V DC, DQ 16x24 V DC ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
PLC selection guide for engineers covering IEC 61131 compliance, Siemens, Rockwell, Schneider, ABB comparison, scan time sizing, and wiring. Shop at Stoklink.
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