6ES7422-1BH11-0AA0 | SIMATIC S7-400 Digital Output Module
This isolated 16-channel digital output module delivers 2A per channel at 24V DC. Designed for the SIMATIC S7-400 series, it offers reliable switching for industrial actuators, lamps, and small motors. The module includes clocked electronic short-circuit protection and supports redundant load control within the same group.
Technical Specifications
| Brand | Siemens |
| Model | 6ES7422-1BH11-0AA0 |
| Series | SIMATIC S7-400 |
| Module Type | Digital Output (SM 422) |
| Channels | 16 isolated digital outputs |
| Load Voltage | 24V DC (20.4V – 28.8V) |
| Output Current per Channel | Rated 2A, max 2.4A, min 5mA |
| Signal “1” Voltage | L+ (-0.5V) min |
| Signal “0” Residual Current | ≤ 0.5 mA |
| Short-Circuit Protection | Clocked electronic, 2.8–6A threshold |
| Switching Frequency (resistive) | 100 Hz max |
| Switching Frequency (inductive) | 0.1 Hz @ 2A, 0.2 Hz @ 1A |
| Lamp Load Capacity | 10 W max, 10 Hz switching |
| Output Delay | 0→1 / 1→0: ≤ 1 ms (resistive) |
| Total Current per Group | 3A @ 40°C, 2A @ 60°C (2 adjacent) |
| Cable Length | shielded: 1000m, unshielded: 600m |
| Power Loss | 5 W typ. |
| Input Current | L+ (no load) ≤30mA; 5V backplane ≤160mA |
| Isolation Test Voltage | 500V DC |
| Dimensions (WxHxD) | 25 x 290 x 210 mm |
| Weight | approx. 600 g |
Key Features & Benefits
- Robust protection: clocked short-circuit protection (2.8–6A) and inductive shutdown limit to -30V.
- High density: 16 digital outputs in a 25mm wide module, ideal for space-critical cabinets.
- Flexible control: supports redundant load control within same group (parallel outputs).
- Easy integration: direct connection to digital inputs; output voltage L+ (-0.5V) ensures reliable “1” signal.
- Thermal management: total current 3A up to 40°C, derating to 2A at 60°C (adjacent channels).
Installation & Commissioning
- Mounting: install in S7-400 rack; 25mm width fits standard slots.
- Wiring: use shielded cable up to 1000m or unshielded up to 600m.
- Configuration: no additional driver needed; set addressing via STEP 7 hardware config.
- Load check: ensure load resistance between 24Ω and 4kΩ per channel.
- Redundant wiring: connect two outputs of same group for fail-safe loads.
Diagnostics & Maintenance
The module does not include built-in diagnostics functions. However, you can monitor the output status via the PLC program. The clocked short-circuit protection automatically limits current, protecting both the module and the load. For maintenance, simply check the LED status on the front plate (if available) and verify the load current does not exceed group limits.
Compatibility & Certifications
- Compatible with all S7-400 CPUs (e.g., 416, 417, 414).
- Isolation: channel-to-channel (group of 8) and backplane bus isolated.
- Certification: CE, UL, and CSA (check regional variants).
- Environmental: operates from 0°C to 60°C ambient, storage -40°C to +85°C.
- Resistance: withstands vibration 5g (10–150Hz) and shock 30g.
Typical Applications
- ▶ Factory automation: control of conveyor drives, solenoid valves, and contactors.
- ▶ Process control: switching of pilot lights, alarms, and small actuators.
- ▶ Material handling: direct output to motor starters and relays.
- ▶ Test stands: high-frequency resistive load switching up to 100 Hz.
Frequently Asked Questions (FAQ)
- Q: Can I parallel outputs for higher current?
A: No. Parallel switching is not allowed for uprating, but you can use it for redundant control (same group). - Q: What is the maximum cable length?
A: Shielded: 1000m; unshielded: 600m. Keep within limits to avoid signal degradation. - Q: Does the module support diagnostic alarms?
A: No built-in diagnostics. Use PLC logic to monitor output status. - Q: Can I switch inductive loads frequently?
A: Max 0.1 Hz at 2A; for higher frequency, use a relay or contactor. - Q: What is the response threshold for short-circuit?
A: 2.8 to 6A (typ.), clocked electronic protection.
Why Buy From Oiltech Controls?
- ✓ 15+ years in industrial automation spare parts – deep technical expertise.
- ✓ Worldwide shipping with FedEx, UPS, DHL – fast and reliable.
- ✓ All modules are tested (surplus / refurbished) before shipment.
- ✓ 12-month warranty on every product – peace of mind.
- ✓ Technical verification and support for obsolete control systems.
- ✓ Dedicated support team – info@oiltechcontrols.com or +86 158 8020 0923 (WhatsApp).
Package Includes: 1x 6ES7422-1BH11-0AA0 module, 1x manual, and mounting screws.
Warranty: 12 months from delivery.
Shipping: via FedEx, UPS, or DHL – tracking provided.
Contact Us: info@oiltechcontrols.com | +86 158 8020 0923 (WhatsApp)
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