Product details
Product Overview
- Siemens 6ES7422-1HH00-0AA0 is a digital output module for the SIMATIC S7-400 system
- Provides 16 isolated relay outputs for AC/DC loads
- Switches voltages from 5 V to 230 V AC and 1 V to 60 V DC
- Each relay handles 5 A continuous current
- Ideal for motor starters, solenoid valves, and indicator lamps
Technical Specifications – Hierarchical View
- Brand & Model
- Brand: Siemens
- Model: 6ES7422-1HH00-0AA0
- Series: SIMATIC S7-400
- Product type: Digital output module SM 422
- Power Supply
- Load voltage L+ (DC): 1 V to 60 V
- Load voltage L1 (AC): 2 V to 264 V (rated 230 V)
- Backplane bus current: 1 A max at 5 V DC
- Typical power loss: 4.5 W
- Output Characteristics
- Number of outputs: 16 relay outputs
- Rated current per output: 5 A (resistive/inductive load)
- Minimum load current for signal “1”: 11 mA
- Lamp load capacity: 60 W max
- Switching frequency (resistive): 10 Hz max
- Switching frequency (inductive/lamp): 1 Hz max
- Mechanical switching frequency: 20 Hz max
- Mechanical life: 3,000,000 cycles
- Electrical life: 100,000 cycles (AC-15/DC-13)
- Group Current Limits
- Up to 40 °C (with fan): 10 A total per group
- Up to 40 °C (without fan): 10 A
- Up to 60 °C (with fan): 10 A
- Up to 60 °C (without fan): 5 A total per group
- Contact Ratings – Relay Outputs
- Resistive load: 5 A at 30 V DC, 5 A at 230 V AC
- Inductive load: 5 A at 30 V DC, 5 A at 230 V AC
- 60 V DC: 1.2 A max
- 125 V DC: 0.2 A max
- Thermal continuous current: 5 A
- Cable Length & Wiring
- Shielded cable: up to 1,000 m
- Unshielded cable: up to 600 m
- Diagnostics & Status
- Diagnostics function: Not available
- Status LED per output: Green LED per channel
- Output status visible locally
- Isolation & Protection
- Potential separation between channels: Yes (group of 2)
- Isolation between channels and backplane bus: Yes
- Isolation tested at 1,500 V AC
- Short-circuit protection: Not available
- Mechanical Data
- Width: 25 mm
- Height: 290 mm
- Depth: 210 mm
- Weight: approx. 700 g
Manager’s Insight
- This module replaces 16 separate relays in your cabinet
- Saves panel space and reduces wiring time significantly
- Relay contacts handle up to 5 A – enough for most industrial loads
- Group current limits require careful load distribution planning
- Use external protection for each output – module has no built-in short-circuit protection
Expert Review – Field Engineer’s Perspective
- I have installed dozens of these modules in automotive and packaging plants
- The relay click is audible – easy to verify output activation during commissioning
- LEDs per channel make troubleshooting fast without a multimeter
- Mechanical life of 3 million cycles means years of reliable service
- Watch the group current limit at 60°C – derate to 5 A in hot cabinets
- Use a fan subassembly if you need full 10 A per group at high temperature
- Redundant control works with two outputs in parallel – great for safety circuits
Installation & Commissioning Guide
- Installation steps
- Mount the module in an S7-400 rack (U-bus or Rack 0)
- Connect 24 V DC backplane power via the rack
- Wire load supply voltage (AC or DC) to the top terminals
- Connect field devices to the lower terminal block
- Commissioning tips
- Use STEP 7 to assign output addresses
- Test each output individually with a small load first
- Monitor LED status during testing
- Check group current distribution before full production
Compatibility & Certifications
- Compatible with
- All SIMATIC S7-400 CPUs (e.g., 414, 416, 417 series)
- S7-400 racks (UR1, UR2, CR2, etc.)
- Works with both AC and DC load supplies
- Certifications
- CE, UL, CSA certified
- IEC 60947-5-1 compliant
- Suitable for industrial environments
Suitable Applications
- This module excels in these use cases
- Motor control: Start/stop contactors and motor starters
- Valve actuation: Solenoid valves in process plants
- Lighting control: Factory floor lighting and indicator towers
- Heating elements: Resistive loads in ovens and dryers
- Safety circuits: Redundant control using two parallel outputs
Package Contents
- Package includes
- 1x Siemens 6ES7422-1HH00-0AA0 module
- 1x front connector (screw-type, included)
- 1x label sheet for channel marking
- Quick start guide
Warranty & Shipping
- 12-month warranty covers manufacturing defects
- Ship within 12-24 hours of order confirmation
- Express options: FedEx, UPS, DHL
- Worldwide shipping available
Frequently Asked Questions (FAQ)
- Q: Can I use this module for DC motor braking?
- A: Yes, but add a freewheeling diode across the load to protect the relay contacts from inductive kickback.
- Q: What is the maximum switching frequency for lamps?
- A: 1 Hz maximum. Fast switching reduces lamp life and may weld relay contacts.
- Q: Does the module support 125 V DC loads?
- A: Yes, but derate to 0.2 A. High DC voltage causes arc damage during contact opening.
- Q: Can I connect two outputs to one large motor starter?
- A: Yes, for redundant control. Both outputs must share the same load voltage and phase.
- Q: How do I know if a relay failed?
- A: The green LED only shows command status, not contact health. Test with a load or check voltage drop across contacts.
Buying Guide & Selection Tips
- Choose this module when you need 16 high-current relays in one slot
- Consider external fusing or circuit breakers for each output
- Add a fan subassembly if your cabinet exceeds 40°C and you need 10 A group current
- For pure DC applications below 60 V, this module works well
- For higher current requirements, consider the 6ES7422-1HH00-0AA0 with external contactors
Contact & Support
- Email: sales@powergearx.com
- WhatsApp: +86 18030005825
- Technical support available 24/7 via email
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