6ES7422-1BL00-0AA0 – SIMATIC S7-400 SM 422 Digital Output Module
Isolated 32 DO · 24 V DC · 0.5 A · Clocked short-circuit protection
Product Description
6ES7422-1BL00-0AA0 is a digital output module for the SIMATIC S7-400 system.
It provides 32 isolated channels with 24 V DC, 0.5 A each.
This SM 422 module supports clocked electronic short-circuit protection (typ. 0.7–1.5 A).
It offers inductive shutdown voltage limitation to -27 V.
Ideal for industrial automation in harsh environments.
Rated for 4 A per group (up to 40 °C) and 2 A (up to 60 °C).
Technical Specifications
| Brand | Siemens · SIMATIC S7-400 |
| Model | 6ES7422-1BL00-0AA0 · SM 422 |
| Type | Digital output module · 32 DO · isolated |
| Load voltage L+ | Rated 24 V DC (permissible 20.4 – 28.8 V DC) |
| Output current (rated) | 0.5 A per channel (max. 0.6 A, min. 5 mA) |
| Short-circuit protection | Yes, clocked electronic · threshold 0.7–1.5 A |
| Inductive shutdown voltage | Limited to -27 V |
| Switching frequency (resistive) | max. 100 Hz |
| Switching frequency (inductive) | max. 0.5 Hz (0.5 A) · 2 Hz (0.3 A) |
| Lamp load | max. 5 W · switching freq. 10 Hz |
| Output delay (resistive) | “0” to “1” ≤1 ms · “1” to “0” ≤1 ms |
| Parallel switching | Possible (same group) for uprating or redundant control |
| Total current per group | 4 A up to 40 °C · 2 A up to 60 °C (8 adjacent outputs) |
| Cable length (shielded) | max. 1000 m |
| Cable length (unshielded) | max. 600 m |
| Power loss | typ. 4 W |
| Backplane bus current | 5 V DC · max. 200 mA |
| Isolation test voltage | 500 V AC / 707 V DC (type test) |
| Diagnostics | Not supported (no diagnostics function) |
| Dimensions (WxHxD) | 25 mm × 290 mm × 210 mm |
| Weight | approx. 600 g |
Key Features & Benefits
- 32 isolated digital outputs – 24 V DC, 0.5 A each, group isolation.
- Clocked short-circuit protection with response threshold 0.7–1.5 A.
- Inductive load capability – shutdown voltage clamped to -27 V.
- Supports parallel switching for uprating or redundant load control.
- High switching frequency – 100 Hz resistive, 10 Hz lamp load.
- Wide temperature range – operates up to 60 °C (derating applies).
- Potential separation between channels and backplane bus.
- Compact width (25 mm) – saves space in the rack.
Installation & Maintenance
- Mounting: Directly plug into S7-400 backplane bus. No additional wiring required.
- Wiring: Use shielded cable for long runs (up to 1000 m). Unshielded up to 600 m.
- Maintenance: No routine calibration. Diagnostics not available – use external monitoring.
- Compatibility: Fully compatible with SIMATIC S7-400 CPUs and ET 200M.
- Environmental: Operates from 0 °C to 60 °C. Storage temperature -40 °C to +70 °C.
Typical Applications & Diagnostics
- Applications: PLC output control for actuators, valves, contactors, and lamp indicators.
- Suitable for industrial automation, process control, and factory floor equipment.
- Diagnostics: Module does not provide built-in diagnostics. Use external I/O check.
- Status indication via CPU – monitor output states through program logic.
Certifications & Standards
- ✔ CE, UL, CSA, and FM approved (per Siemens certification)
- ✔ IEC 60947-5-1 (DC13) compliant for inductive loads
- ✔ RoHS compliant · suitable for industrial environments
Package Contents & Warranty
- ▪ 1 × 6ES7422-1BL00-0AA0 SM 422 module
- ▪ 1 × front connector (screw-type, included)
- ▪ 1 × labeling strip · manual (digital download)
- 12-month warranty against defects in materials and workmanship.
- Shipping: FedEx, UPS, DHL – worldwide express delivery.
Frequently Asked Questions
- Q: Can I use this module with S7-300? A: No, it is designed for S7-400 only.
- Q: Does it support diagnostics? A: No diagnostics function – use CPU monitoring.
- Q: What is the max cable length? A: 1000 m shielded, 600 m unshielded.
- Q: Can I parallel outputs? A: Yes, but only within the same group.
- Q: Is it new or refurbished? A: We supply tested industrial surplus / refurbished options.
Why Buy From Oiltech Controls?
- ▪ 15+ years industrial automation spare parts expertise.
- ▪ Global shipment support – quick dispatch to any location.
- ▪ All units are tested before shipment (verified functionality).
- ▪ 12-month warranty for peace of mind.
- ▪ Technical verification for obsolete control systems.
- ▪ Refurbished / surplus options with full performance.
Inquiries:
info@oiltechcontrols.com ·
+86 158 8020 0923 (WhatsApp)
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Original Source: https://www.oiltechcontrols.com/
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