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 6ES7223-1PL32-0XB0 is a SIMATIC S7-1200 SM 1223 digital I/O module with 16 digital inputs, 24 V DC sink/source, and 16 relay outputs rated 2 A each. It mounts on the S7-1200 backplane bus, doubling the point count of the 8-channel SM 1223 variant in the same product family. The relay outputs switch AC loads up to 250 V or DC loads up to 30 V.
This 16DI/16DO relay variant doubles the channel count of the 8-channel SM 1223 in the same family while keeping the module width to 70 mm, reducing backplane space per I/O point versus running two 8-channel modules. Full 16-output operation is thermally limited: all 16 relay outputs can be active simultaneously up to 55 degrees C horizontal or 45 degrees C vertical mounting, dropping to 8 simultaneously active, non-adjacent, outputs at the 60 degrees C horizontal / 50 degrees C vertical maximum. Choose a transistor-output DQ variant instead when switching speed exceeds the relay's 100,000-cycle rated-load life.
Typical uses include expanding S7-1200 digital I/O on machine control panels with higher point counts, driving 24 V DC or up to 250 V AC field devices such as indicator lamps, small motor starters, and solenoid valves directly from the relay outputs, and reading 24 V DC sensor and pushbutton inputs in groups of two.
| Product type designation | SM 1223, DI 16x24 V DC, DQ 16x relay |
|---|
| 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. | 180 mA |
|---|---|
| Digital inputs: from load voltage L+ (without load), max. | 4 mA/input 11 mA/relay |
| Part number | 6ES7223-1PL32-0XB0 |
|---|---|
| Type designation | SM 1223, DI 16x24 V DC, DQ 16x relay |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 6940408102019 |
| ETIM class | EC001419 |
| eCl@ss | 27242204 |
| Power supply to the transmitters: present | Yes |
|---|
| Power loss, typ. | 10 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 | 4 |
| Short-circuit protection | No; to be provided externally |
| Switching capacity of the outputs: with resistive load, max. | 2 A |
| Switching capacity of the outputs: on lamp load, max. | 30 W with DC, 200 W with AC |
| Output voltage: Rated value (DC) | 5 V DC to 30 V DC |
| Output voltage: Rated value (AC) | 5 V AC to 250 V AC |
| Output current: for signal "1" rated value | 2 A |
| Output current: for signal "1" permissible range, max. | 2 A |
| Output delay with resistive load: "0" to "1", max. | 10 ms |
| Output delay with resistive load: "1" to "0", max. | 10 ms |
| Total current of the outputs (per group) horizontal installation: up to 50 °C, max. | 8 A; Current per mass |
| Relay outputs: Number of relay outputs | 16 |
| Relay outputs: Rated supply voltage of relay coil L+ (DC) | 24 V |
| Relay outputs: Number of operating cycles, max. Switching capacity of contacts | mechanically 10 million, at rated load voltage 100 000 |
| Relay outputs: with inductive load, max. | 2 A |
| Relay outputs: on lamp load, max. | 30 W with DC, 200 W with AC |
| Relay outputs: with resistive load, max. | 2 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 | Relays |
| Potential separation digital outputs: between the channels, in groups of | 4 |
| Potential separation digital outputs: between the channels and backplane bus | 1 500 V AC for 1 minute |
| between different circuits | 750 V AC for 1 minute |
|---|
| 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; Number of simultaneously activated outputs: 8 (no adjacent points) at 60 °C horizontal or 50 °C vertical, 16 at 55 °C horizontal or 45 °C vertical |
| 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. | 350 g |
|---|
| Net weight | 0.319 kg |
|---|---|
| Country of origin | DE |
| Shipping weight | 0.819 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 16x relay is 2 A.
The rated operational voltage of SM 1223, DI 16x24 V DC, DQ 16x relay is 24 V AC.
The tariff (HS) code on file for SM 1223, DI 16x24 V DC, DQ 16x relay is 85389091.
The EAN (GTIN) of SM 1223, DI 16x24 V DC, DQ 16x relay is 6940408102019.
SM 1223, DI 16x24 V DC, DQ 16x relay 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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