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 SIMATIC S7-1200 SM 1222 (6ES7222-1HF32-0XB0) is a relay digital output module with 8 outputs rated 2 A each, switching 5 - 30 V DC or 5 - 250 V AC loads directly from an S7-1200 station. Contacts handle 10 million mechanical cycles, or 100,000 at rated load, switching up to 30 W DC or 200 W AC lamp loads in a 45 x 100 x 75 mm, 0.174 kg IP20 housing.
Relay outputs switch AC loads directly, up to 250 V AC at 200 W lamp load, which a transistor DO module can't, at the cost of a mechanical life limited to 100,000 cycles at rated load versus millions of cycles for solid-state switching. Choose the transistor-output SM 1222 variant in the same family instead for high-cycle-rate DC loads where contact wear would be the limiting factor.
Switches mixed AC/DC loads directly from an S7-1200 station, including contactor coils, indicator lamps, and small motor starters, without an external interposing relay.
| Product type designation | SM 1222, DQ 8x relay/2 A |
|---|
| permissible range, lower limit (DC) | 20.4 V |
|---|---|
| permissible range, upper limit (DC) | 28.8 V |
| from backplane bus 5 V DC, max. | 120 mA |
|---|---|
| Digital outputs: from load voltage L+, max. | 11 mA/relay coil |
| Part number | 6ES7222-1HF32-0XB0 |
|---|---|
| Type designation | SM 1222, DQ 8x relay/2 A |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 6940408101944 |
| ETIM class | EC001419 |
| eCl@ss | 27242204 |
| Power loss, typ. | 4.5 W |
|---|
| Number of digital outputs | 8 |
|---|---|
| in groups of | 2 |
| 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. | 10 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 |
| Alarms: Diagnostic alarm | Yes |
|---|---|
| Diagnostics indication LED: for status of the outputs | Yes |
| Potential separation digital outputs: between the channels | Relays |
|---|---|
| Potential separation digital outputs: between the channels, in groups of | 2 |
| 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 |
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| IP degree of protection | IP20 |
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| 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] | 68.6 kg |
| Ecological footprint: global warming potential, (during production) [CO2 eq] | 8.16 kg |
| Ecological footprint: global warming potential, (during operation) [CO2 eq] | 60.7 kg |
| Ecological footprint: global warming potential, (after end of life cycle) [CO2 eq] | -0.334 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 |
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| Enclosure material (front): Plastic | Yes |
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| eClass | 16 27-24-22-04 |
|---|---|
| ETIM | 10 EC001419 |
| IDEA | 4 3566 |
| UNSPSC | 15 32-15-17-05 |
| Net weight | 0.174 kg |
|---|---|
| Country of origin | DE |
| Shipping weight | 0.674 kg |
| Ships from | Türkiye |
| Dispatch | 13 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 1222, DQ 8x relay/2 A is 2 A.
The rated operational voltage of SM 1222, DQ 8x relay/2 A is 5–250 V AC.
The tariff (HS) code on file for SM 1222, DQ 8x relay/2 A is 85389091.
The EAN (GTIN) of SM 1222, DQ 8x relay/2 A is 6940408101944.
SM 1222, DQ 8x relay/2 A 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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