6ES7422-1FH00-0AA0 Siemens SM422 AC Output Module | 16 Channels 120-230V

Product Overview

• Siemens 6ES7422-1FH00-0AA0 – digital output module for SIMATIC S7-400 systems
  • SM 422 series, 16 isolated outputs
  • Rated voltage: 120/230 V AC
  • Output current: 2 A per channel
  • Fuse protection per group (8A, 250V)

Technical Specifications – Hierarchical View

• Supply & Power
  • Load voltage: 120/230 V AC (79‑264 V range)
  • Frequency: 47‑63 Hz
  • Current draw: 1.5 mA (no load) / 400 mA (backplane)
  • Typical power loss: 16 W
• Output Specifications
  • 16 digital outputs, isolated in groups of 4
  • Signal “1” voltage: L1 (-18.1 V) minimum
  • Rated output current: 2 A (10 mA minimum)
  • Surge current: 50 A per cycle (max)
  • Residual current at “0”: 2.6 mA maximum
• Switching Performance
  • Output delay (0→1): 1 ms maximum
  • Output delay (1→0): 1 AC cycle maximum
  • Switching frequency – resistive: 10 Hz
  • Switching frequency – inductive: 0.5 Hz
  • Switching frequency – lamp load: 1 Hz
• Protection & Diagnostics
  • Short-circuit protection: fuse per group (8A, 250V)
  • Response time: 100 ms (max)
  • Diagnostics LED: INTF (internal fault) / EXTF (external fault)
  • No parameterizable diagnostics – use LED indicators
• Isolation & Cable
  • Isolation: 1500 V AC (channel to bus)
  • Shielded cable: 1000 m maximum
  • Unshielded cable: 600 m maximum
• Mechanical Data
  • Width: 25 mm
  • Height: 290 mm
  • Depth: 210 mm
  • Weight: 800 g approx.

Expert Review – Field Engineer’s Insight

• This module handles AC loads reliably in real industrial conditions.
• The 2A per channel supports small contactors, valves, and indicator lamps.
• Group fuses protect your system without shutting down all outputs.
• Use the 6ES7422-1FH00-0AA0 when you need high-voltage AC switching.
• The module suits applications with 120V or 230V control circuits.
• Watch the total current per group – 4A up to 40°C, 2A up to 60°C.
• Add a fan assembly to increase the current capacity to 6A per group.

Compatibility & Applications

• Compatible systems
  • SIMATIC S7-400 PLCs (all CPU models)
  • Works with standard S7-400 racks and power supplies
• Suitable devices
  • AC contactors and motor starters (NEMA Size 5 max)
  • Indicator lamps (up to 50 W lamp load)
  • Solenoid valves, relays, and small AC actuators
• Typical industries
  • Factory automation, process control, material handling
  • HVAC systems, pump stations, conveyor lines

Installation & Wiring Guide

• Mounting
  • Install the module in any S7-400 rack slot
  • Secure with the built-in locking mechanism
  • Allow airflow for heat dissipation (16W typical)
• Wiring best practices
  • Use 2.5 mm² wire for 2A output current
  • Keep unshielded cable runs under 600 m
  • Use shielded cable for longer runs (up to 1000 m)
  • Connect the common return wire per group (4 channels each)
• Fuse replacement
  • Use 8A, 250V quick-response fuses (spare provided)
  • Check INTF LED for fuse failure indication

Maintenance & Troubleshooting

• Check INTF LED for internal faults (fuse blown)
• Check EXTF LED for missing load voltage
• Replace fuses with the same rating – 8A, 250V quick-response
• No parameterizable diagnostics – use LED status for fault finding
• Monitor total group current to avoid overheating

Package Contents

• 1x Siemens 6ES7422-1FH00-0AA0 output module
• Spare fuses (8A, 250V quick-response)
• Product documentation (English/Chinese)

Shipping & Warranty

• 12-month warranty against manufacturing defects
• Express shipping: FedEx, UPS, DHL
• Dispatch within 12-24 hours (business days)

Frequently Asked Questions (FAQ)

• Q: Can the 6ES7422-1FH00-0AA0 switch DC loads?
  • A: No, this module outputs AC voltage only. For DC outputs, choose 6ES7422-1BL00-0AA0.
• Q: What does the INTF red LED indicate?
  • A: Internal fault – typically a blown fuse in one of the output groups. Check and replace the 8A fuse.
• Q: Can I parallel two outputs for higher current?
  • A: Yes, only for outputs with the same load voltage. This works for redundant control of a single load.
• Q: Why does my output not switch fast enough?
  • A: The 0→1 delay is 1ms, but 1→0 delay takes up to 1 AC cycle (16-20ms). This is normal for AC outputs.
• Q: What is the maximum cable length for field wiring?
  • A: Use shielded cable up to 1000 m. For unshielded cable, limit the length to 600 m.
• Q: Can this module drive NEMA Size 5 motor starters?
  • A: Yes, the 6ES7422-1FH00-0AA0 supports starters up to NEMA Size 5. Check the inrush current carefully.

Buying Guide & Selection Advice

• Choose the 6ES7422-1FH00-0AA0 for AC output applications only.
• Need higher output current? Consider the 6ES7422-1FH00-0AA0 (2A) is sufficient for most loads.
• For 24V DC outputs, use the 6ES7422-1BL00-0AA0 (32 DO, 0.5A).
• Check your group current – 4A max at 40°C, 2A max at 60°C (without fan).
• Add a fan assembly (optional) to increase current capacity to 6A per group.

Contact & Support

• Email: sales@powergearx.com
• WhatsApp: +86 18030005825 (click to chat)
• Technical support available in English and Chinese

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