Product Description
6ES7422-7BL00-0AB0 | Siemens SM 422 is a 32-channel digital output module for the SIMATIC S7-400 system. It delivers 24 V DC, 0.5 A per channel with a fast 0.15 ms output delay. Optical isolation and diagnostics ensure reliable operation in demanding industrial environments.
Key Features & Benefits
- 32 digital outputs – 24 V DC, 0.5 A rated, 0.6 A max per channel
- Integrated diagnostics – internal/external fault detection and alarm
- Galvanic isolation – 500 V DC tested, groups of 8 channels isolated
- Inductive shutdown clamp – limits voltage to L+ (-45 V) for coil protection
- Wide temperature range – 0 to 60 °C ambient operation
- High switching frequency – 100 Hz resistive, 2 Hz inductive
Technical Specifications
| Brand | Siemens |
| Model | 6ES7422-7BL00-0AB0 |
| Product type | SM 422 Digital Output Module |
| Supply voltage | 24 V DC (20.4 – 28.8 V) |
| Input current (no load) | ≤ 120 mA from L+; ≤ 200 mA from backplane |
| Power loss | max. 8 W |
| Output current | 0.5 A rated, 0.6 A max, 5 mA min |
| Residual current (“0”) | ≤ 0.5 mA |
| Switching freq. (resistive) | 100 Hz |
| Switching freq. (inductive) | 2 Hz |
| Lamp load | max. 5 W |
| Group current | 2 A per group (8 channels) @ 60 °C |
| Cable length (shielded) | 1000 m |
| Cable length (unshielded) | 600 m |
| Isolation voltage | 500 V DC tested |
| Dimensions (W x H x D) | 25 x 290 x 210 mm |
| Weight | approx. 0.6 kg |
Installation & Mounting
- Snap-on mounting onto S7-400 rack (UR1/UR2).
- Connect load voltage L+ (24 V DC) to terminal block.
- Use shielded cables for runs > 600 m.
- Observe group current limits – 2 A per 8-channel group.
- Allow free air circulation for cooling; no forced air required.
Diagnostics & Alarms
- Diagnostic alarm – programmable for internal/external faults.
- Status LEDs – per channel for “1” signal indication.
- Fault detection – short-circuit, overload, and wire-break.
- Quick troubleshooting – reduce downtime with live diagnostics.
Compatibility & System Integration
- Compatible with SIMATIC S7-400 CPUs (e.g., 412, 414, 416, 417).
- Integrates seamlessly with PCS 7 and TIA Portal.
- Supports configuration via STEP 7 V5.x and TIA Portal V13+.
- Works with ET 200M and distributed I/O systems.
Environmental & Immunity
- Operating temp: 0 … 60 °C (horizontal), 0 … 40 °C (vertical).
- Storage temp: -40 … +70 °C.
- Humidity: 5 … 95 % RH non-condensing.
- EMC immunity: EN 61000-6-2 (industrial environment).
- Protection class: IP20 (front), safe for control cabinet.
Certifications & Standards
- CE marked – complies with EU directives.
- UL/cUL listed (File E192450).
- FM approved for hazardous locations Class I, Div. 2.
- RoHS compliant and REACH aware.
Package Contents
- 1x SM 422 module (6ES7422-7BL00-0AB0)
- 1x front connector (screw-type, 40-pin)
- 1x label strip for channel designation
- 1x manual (digital download)
Typical Applications
- Discrete control in power plants and refineries.
- Valve and actuator control in chemical processes.
- Conveyor systems and material handling.
- Packaging machines and factory automation.
Frequently Asked Questions (FAQ)
Q: Can I use this module with a 5 V DC signal?
A: No. The SM 422 requires a 24 V DC load voltage. Use a level shifter for 5 V signals.
Q: What is the maximum cable length for 24 V outputs?
A: 1000 m shielded, 600 m unshielded – ensure proper grounding.
Q: How do I reset a diagnostic alarm?
A: Use the “RESET” function in STEP 7 or cycle the load voltage.
Q: Is the module hot-swappable?
A: Yes, in a redundant system with appropriate CPU support.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Global shipping – via FedEx, UPS, or DHL express.
- Tested surplus/refurbished – fully functional and verified.
- 12-month warranty – covers defects and performance.
- Technical verification – each unit checked before shipment.
- Support for obsolete systems – we source hard-to-find parts.
Contact: info@oiltechcontrols.com | +86 158 8020 0923 (WhatsApp)
Shipping: FedEx, UPS, DHL – worldwide door-to-door. Express delivery available.
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Original Source: https://www.oiltechcontrols.com/
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