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 6ES7223-1BH32-0XB0 is a SIMATIC S7-1200 digital I/O module, SM 1223, with 8 sink/source 24V DC inputs and 8 transistor outputs rated 0.5A, expanding an S7-1200 CPU's I/O count with IP20-rated hardware carrying CE, UL, CSA, cULus, FM, RCM, KC, and Marine approvals.
The 8 transistor outputs have no internal short-circuit protection, so each output circuit needs its own external fuse or protection device sized to the 0.5A rating - a detail that catches installers moving from a protected relay-output SM to this transistor variant. Inputs are grouped in twos for wiring and in fours for the input-delay parameter (0.2 to 12.8 ms), so a noisy limit switch can be filtered without slowing down a fast encoder input on the same module. Marine approval alongside the standard CE/UL/cULus set is the reason to pick this SM 1223 over a lower-cost equivalent when the panel is destined for a vessel or offshore application.
I/O expansion for S7-1200-based machine control - discrete sensor/switch inputs and valve, indicator, or relay-coil transistor outputs - including marine and offshore panels where Marine approval is a project requirement.
| Product type designation | SM 1223, DI 8x24 V DC, DQ 8x24 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. | 145 mA |
|---|---|
| Digital inputs: from load voltage L+ (without load), max. | 4 mA; per channel |
| Part number | 6ES7223-1BH32-0XB0 |
|---|---|
| Type designation | SM 1223, DI 8x24 V DC, DQ 8x24 V DC |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 6940408101982 |
| ETIM class | EC001419 |
| eCl@ss | 27242204 |
| Power supply to the transmitters: present | Yes |
|---|
| Power loss, typ. | 2.5 W |
|---|
| Number of digital inputs | 8 |
|---|---|
| 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 | 8 |
| 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 | 8 |
|---|---|
| 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. | 4 A; Current per mass |
| 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 | 45 mm |
|---|---|
| Height | 100 mm |
| Depth | 75 mm |
| Weight, approx. | 210 g |
|---|
| Miscellaneous | Manufacturer Declara- tion |
|---|---|
| General Product Approval | EMV For use in hazardous locations |
| For use in hazardous locations | Maritime application |
|---|---|
| FM CCC-Ex NK / Nippon Kaiji Ky- | okai |
| CCS (China Classifica- | KR (Korean Register |
|---|
| Net weight | 0.192 kg |
|---|---|
| Country of origin | DE |
| Shipping weight | 0.692 kg |
| Ships from | Türkiye |
| Dispatch | 12 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
The rated current of SM 1223, DI 8x24 V DC, DQ 8x24 V DC is 0.5 A.
The rated operational voltage of SM 1223, DI 8x24 V DC, DQ 8x24 V DC is 24 V DC.
The tariff (HS) code on file for SM 1223, DI 8x24 V DC, DQ 8x24 V DC is 85389091.
The EAN (GTIN) of SM 1223, DI 8x24 V DC, DQ 8x24 V DC is 6940408101982.
SM 1223, DI 8x24 V DC, DQ 8x24 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.
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