6ES7422-1BH11-0AA0 Siemens 16-Channel Digital Output | S7-400 SM 422

Product Overview

• Siemens 6ES7422-1BH11-0AA0 – digital output module for S7-400 systems
  • Part of the SIMATIC S7-400 SM 422 series
  • Provides 16 isolated digital outputs
  • Rated at 24 V DC with 2 A per channel
  • Clocked electronic short-circuit protection

Technical Specifications – Hierarchical View

• Supply voltage
  • Rated value: 24 V DC
  • Lower limit: 20.4 V DC
  • Upper limit: 28.8 V DC
• Current consumption
  • From load voltage L+ (no load): max. 30 mA
  • From backplane bus 5 V DC: max. 160 mA
• Power loss
  • Typical: 5 W
• Digital outputs
  • Number of outputs: 16 channels
  • Short-circuit protection: Yes (clocked electronic)
  • Response threshold: 2.8 to 6 A typical
  • Inductive shutdown voltage limit: -30 V
  • Can control digital inputs: Yes
• Output ratings
  • Lamp load capacity: max. 10 W
  • Load resistance range: 24 Ω to 4 kΩ
  • Signal “1” voltage: min. L+ (-0.5 V)
  • Signal “1” rated current: 2 A
  • Signal “1” current range: 5 mA to 2.4 A
  • Signal “0” residual current: max. 0.5 mA
• Switching performance
  • Output delay (resistive load): max. 1 ms (both transitions)
  • Resistive load switching frequency: max. 100 Hz
  • Inductive load (DC13) at 1 A: 0.2 Hz
  • Inductive load (DC13) at 2 A: 0.1 Hz
  • Lamp load frequency: max. 10 Hz
• Group current limits
  • Up to 40°C: max. 3 A per group
  • Up to 60°C: max. 2 A (2 adjacent outputs each)
• Cable length
  • Shielded: max. 1000 m
  • Unshielded: max. 600 m
• Isolation & testing
  • Channel-to-channel isolation: Yes
  • Group isolation: 8 channels per group
  • Channel-to-backplane bus isolation: Yes
  • Test voltage: 500 V DC

Expert Review – Field Engineer’s Insight

• This module handles heavy loads better than most competitors
• Each output drives 2 A continuously – ideal for solenoid valves and contactors
• Clocked short-circuit protection prevents damage from wiring mistakes
• Inductive load switching is slow (0.1 Hz) – plan for this limitation
• Group current derating at 60°C requires careful load distribution

Compatible Systems & Applications

• Compatible PLC systems
  • Siemens SIMATIC S7-400 series
  • Works with all S7-400 CPUs (UR1, UR2, UR2-H racks)
  • Requires S7-400 backplane bus connection
• Typical applications
  • Driving DC contactors and relays in motor control centers
  • Actuating solenoid valves in process automation
  • Controlling indicator lamps and small actuators
  • Interfacing with 24 V DC digital field devices

Installation & Wiring Guide

• Mount the module in any S7-400 rack slot
• Connect 24 V DC load supply to terminals L+ and M
• Wire outputs to field devices using 0.5-2.5 mm² cable
• Use shielded cable for runs over 600 m (max 1000 m)
• Group outputs in pairs to share common return paths

Maintenance & Troubleshooting

• No diagnostics function – check module status via PLC program
• Monitor output current per group to avoid exceeding limits
• If an output trips, the module auto-resets after fault removal
• Replace the module without removing wiring (spring terminals)

Package Contents

• 1x Siemens 6ES7422-1BH11-0AA0 output module
• 1x front connector (screw-type, included)
• 1x label strip for channel identification
• Quick-start guide (multilingual)

Shipping & Warranty

• 12-month warranty against manufacturing defects
• Same-day dispatch (orders placed before 2 PM GMT+8)
• Express shipping via FedEx, UPS, or DHL
• Tracking number provided within 24 hours

Frequently Asked Questions

• Can I parallel two outputs for higher current?
  • A: No, the module does not support output parallel connection for uprating.
• Can I use two outputs to control one redundant load?
  • A: Yes, but only outputs from the same group can provide redundancy.
• What is the maximum switching frequency for inductive loads?
  • A: At 1 A load, max 0.2 Hz. At 2 A load, reduce to 0.1 Hz.
• Does this module detect open circuits or short circuits?
  • A: No diagnostics feature. The module only has short-circuit protection without reporting.
• How do I derate the output current at high temperatures?
  • A: Above 40°C, limit group current to 2 A with only 2 adjacent outputs active.

Selection Guide – Which Module Do You Need?

• Need 16 outputs at 2 A? Choose 6ES7422-1BH11-0AA0 (this module)
• Need 32 outputs at 0.5 A? Choose 6ES7422-1BL00-0AA0
• Need relay outputs? Choose 6ES7422-1HH00-0AA0
• Need diagnostic capabilities? Choose 6ES7422-5BH00-0AB0

Contact & Support

• Email: sales@powergearx.com
• WhatsApp: +86 18030005825
• Technical support available Monday-Friday, 9 AM-6 PM GMT+8

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