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.
- Part number
- 6ES7223-5PH50-0XB0
- Model no
- SM 1223, DI 8x 24 V DC, DQ 8x relay
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SIMATIC S7-1200Siemens 6ES7223-5PH50-0XB0 SIMATIC S7-1200 SM 1223 Digital I/O 8DI/8RLY PLC I/O Module
SIMATIC S7-1200 SM 1223 digital I/O module, 8 DI 24V DC, 8 relay DO 2A, IP20
Description
About the SM 1223, DI 8x 24 V DC, DQ 8x relay
About the SM 1223, DI 8x 24 V DC, DQ 8x relay
The Siemens SIMATIC S7-1200 SM 1223 (6ES7223-5PH50-0XB0) is a digital I/O signal module adding 8 sink/source 24 V DC inputs and 8 relay outputs rated 2 A to an S7-1200 station. It plugs directly onto the CPU or a prior expansion module, drawing 105 mA from the 5 V DC backplane bus.
Certifications & Standards
- CE
- UL
- cULus
- RCM
- KC
Selection Notes
The relay outputs on this module switch resistive loads to 2 A and lamp loads to 200 W AC / 30 W DC without an external interposing relay, at the cost of a slower output delay (10 ms) than a transistor-output SM 1223 variant - pick the relay variant to switch AC or mixed-voltage loads directly from the PLC, and a transistor variant where faster switching matters. Inputs are grouped in fours with 707 V DC isolation from the backplane bus, so mixed signal types across input groups stay electrically isolated from the CPU side.
Applications
Expanding digital I/O on an S7-1200 station where the CPU's onboard I/O is not enough - the relay outputs suit driving contactors, solenoids, and indicator lamps directly, while the 8 DC inputs read limit switches, push-buttons, or sensor contacts in machine control panels.
Specification
Full specification
General information 1
| Product type designation | SM 1223, DI 8x 24 V DC, DQ 8x relay |
|---|
Supply voltage 3
| Rated value (DC) | 24 V |
|---|---|
| permissible range, lower limit (DC) | 20.4 V |
| permissible range, upper limit (DC) | 28.8 V |
Input current 3
| from backplane bus 5 V DC, max. | 105 mA |
|---|---|
| Digital inputs: from load voltage L+ (without load), max. | 4.1 mA; per channel |
| Digital outputs: from load voltage L+, max. | 9 mA; per relay coil |
Show all 107 specifications ↓ Show less ↑100 more values in Identification, Power loss, Digital inputs, Digital outputs, Interrupts/diagnostics/status information, Potential separation, Isolation, Degree and class of protection, Standards, approvals, certificates, Ambient conditions, Connection method, Mechanics/material, Dimensions, Version Classification, Logistics.
Identification 10
| Part number | 6ES7223-5PH50-0XB0 |
|---|---|
| Type designation | SM 1223, DI 8x 24 V DC, DQ 8x relay |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4047623417354 |
| ETIM class | EC001419 |
| eCl@ss | 27242204 |
Power loss 1
| Power loss, typ. | 4.8 W |
|---|
Digital inputs 13
| Number of digital inputs | 8 |
|---|---|
| in groups of | 4 |
| 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 or 0.5 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 |
Digital outputs 19
| Number of digital outputs | 8 |
|---|---|
| in groups of | 8 |
| 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 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. | 16 A; Current per mass |
| Relay outputs: Number of relay outputs | 8 |
| 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 |
Interrupts/diagnostics/status information 6
| Diagnostics function | Yes |
|---|---|
| Alarms: Diagnostic alarm | Yes |
| Diagnoses: Monitoring the supply voltage | Yes |
| Diagnostics indication LED: for status of the inputs | Yes |
| Diagnostics indication LED: for status of the outputs | Yes |
| Diagnostics indication LED: for maintenance | Yes |
Potential separation 5
| Potential separation digital inputs: between the channels, in groups of | 4 |
|---|---|
| Potential separation digital inputs: between the channels and backplane bus | Yes; 707 V DC (type test) |
| Potential separation digital outputs: between the channels | Relays |
| Potential separation digital outputs: between the channels, in groups of | 8 |
| Potential separation digital outputs: between the channels and backplane bus | Yes; 4 200 V DC (type test) |
Isolation 1
| Isolation tested with | 1500 V AC (type test) |
|---|
Degree and class of protection 1
| IP degree of protection | IP20 |
|---|
Standards, approvals, certificates 14
| Siemens Eco Profile (SEP) | Siemens EcoTech |
|---|---|
| CE mark | Yes |
| CSA approval | No |
| UL approval | Yes |
| cULus | Yes |
| FM approval | No |
| RCM (formerly C-TICK) | Yes |
| KC approval | Yes |
| Marine approval | No |
| Ecological footprint: environmental product declaration Global warming potential | Yes; type 2 acc. to ISO 14021 |
| Ecological footprint: global warming potential, (total) [CO2 eq] | 40.3 kg |
| Ecological footprint: global warming potential, (during production) [CO2 eq] | 7.79 kg |
| Ecological footprint: global warming potential, (during operation) [CO2 eq] | 32.5 kg |
| Ecological footprint: global warming potential, (after end of life cycle) [CO2 eq] | -0.089 kg |
Ambient conditions 18
| Free fall: Fall height, max. | 0.3 m; five times, in product package |
|---|---|
| Ambient temperature during operation: min. | -20 °C; No condensation |
| Ambient temperature during operation: max. | 40 °C; at max. voltages and max. specifications |
| Ambient temperature during operation: horizontal installation, min. | -20 °C; No condensation |
| Ambient temperature during operation: vertical installation, min. | -20 °C; No condensation |
| 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: Operation, min. | 540 hPa |
| Air pressure acc. to IEC 60068-2-13: Operation, max. | 1 140 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, min. | 540 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, max. | 1 140 hPa |
| Altitude during operation relating to sea level: Installation altitude, min. | -1 000 m |
| Relative humidity: Operation at 25 ℃ without condensation, max. | 95 % |
| Vibrations: Vibration resistance during operation acc. to IEC 60068-2-6 | 3.5 mm from 5 - 8.4 Hz, 1g from 8.4 - 150 Hz |
| Vibrations: Operation, tested according to IEC 60068-2-6 | Yes |
| Shock testing: tested according to IEC 60068-2-27 | Yes; IEC 68, Part 2-27 half-sine: strength of the shock 15 g (peak value), duration 11 ms |
| Pollutant concentrations: SO2 at RH < 60% without condensation | S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60 % condensation-free |
Connection method 1
| required front connector | No |
|---|
Mechanics/material 1
| Enclosure material (front): Plastic | Yes |
|---|
Dimensions 1
| Width | 30 mm |
|---|
Version Classification 2
| eClass | 16 27-24-22-04 |
|---|---|
| ETIM | 10 EC001419 |
Logistics 7
| Net weight | 0.24 kg |
|---|---|
| Package dimensions | 150 × 47 × 110 mm |
| Country of origin | CN |
| Shipping weight | 0.74 kg |
| Ships from | Türkiye |
| Dispatch | 12 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
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Certifications
Certifications and standards
- CE mark
- UL approval
- cULus
- RCM (formerly C-TICK)
- KC approval
Quick answers
Questions about the SM 1223, DI 8x 24 V DC, DQ 8x relay
What is the rated current of SM 1223, DI 8x 24 V DC, DQ 8x relay?
The rated current of SM 1223, DI 8x 24 V DC, DQ 8x relay is 2 A.
Which supply voltage is SM 1223, DI 8x 24 V DC, DQ 8x relay rated for?
The rated operational voltage of SM 1223, DI 8x 24 V DC, DQ 8x relay is 24 V AC.
What is the HS code of SM 1223, DI 8x 24 V DC, DQ 8x relay for customs?
The tariff (HS) code on file for SM 1223, DI 8x 24 V DC, DQ 8x relay is 85389091.
What is the EAN of SM 1223, DI 8x 24 V DC, DQ 8x relay?
The EAN (GTIN) of SM 1223, DI 8x 24 V DC, DQ 8x relay is 4047623417354.
Where does SM 1223, DI 8x 24 V DC, DQ 8x relay ship from, and how fast?
SM 1223, DI 8x 24 V DC, DQ 8x relay ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
Guides
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Customer reviews
Series
Siemens SIMATIC S7-1200
- Brand
- Siemens
- Series
- SIMATIC S7-1200
