Name: 6ES7422-1BL00-0AA0 SIMATIC S7-400 DO Module | 24V DC 0.5A Isolated Outputs
SKU: 6ES7422-1BL00-0AA0
Price: 234.00 USD
Availability: InStock

Product details

Product Overview

Siemens 6ES7422-1BL00-0AA0 – digital output module for SIMATIC S7-400 systems
- Provides 32 isolated digital outputs
- Rated at 24 V DC with 0.5 A per channel
- Short-circuit protected with electronic clocking
- Typical power loss only 4 W for energy efficiency

Key Technical Specifications

Brand & Model
- Brand: Siemens
- Model: 6ES7422-1BL00-0AA0
- Series: SIMATIC S7-400
- Product Type: SM 422 Digital Output Module
Supply Voltage
- Rated voltage: 24 V DC
- Permissible range: 20.4 V to 28.8 V DC
- Input current from L+ (no load): max 30 mA
- Backplane bus current: max 200 mA at 5 V DC
Digital Outputs
- Number of outputs: 32 isolated channels
- Output voltage for signal “1”: min L+ (-0.3 V)
- Rated output current: 0.5 A per channel
- Residual current for signal “0”: max 0.3 mA
- Load range: 48 Ω to 4 kΩ
Protection Features
- Short-circuit protection: clocked electronically
- Response threshold: 0.7 A to 1.5 A typical
- Inductive shutdown voltage: limited to -27 V
- Lamp load capacity: max 5 W
Switching Performance
- Output delay (resistive): max 1 ms both ways
- Switching frequency – resistive: max 100 Hz
- Switching frequency – inductive: max 0.5 Hz (0.5 A)
- Switching frequency – lamp load: max 10 Hz
Group Current Limits
- Up to 40°C: 4 A per group
- Up to 60°C: 2 A per group (8 adjacent outputs)
Cable Lengths
- Shielded: max 1000 m
- Unshielded: max 600 m
Isolation
- Between channels: Not isolated
- Groups: 32 channels per group
- Channels to backplane: 500 V AC tested
Dimensions & Weight
- Width: 25 mm
- Height: 290 mm
- Depth: 210 mm
- Weight: approx. 600 g

Expert Review

Field Engineer’s Insight: This module handles 32 outputs with reliable short-circuit protection. The clocked electronic shutdown prevents damage during accidental overloads. Use it for solenoid valves, contactors, and indicator lights in S7-400 racks. The 1 ms response time suits most industrial logic applications. Derate current above 40°C to maintain long-term reliability.

Compatibility & Applications

Compatible Systems
- Siemens SIMATIC S7-400 PLC systems
- Works with all S7-400 CPUs (e.g., 414, 416, 417)
- Fits standard S7-400 rack (UR1, UR2, CR2)
Suitable Applications
- Discrete output control in manufacturing lines
- Actuator and valve control in process plants
- Signal distribution for conveyor systems
- Lamp status indication in control panels

Installation & Maintenance Tips

Mount module in any S7-400 rack slot. No special configuration needed.
Use shielded cable for runs longer than 600 m to avoid noise.
Group outputs together to simplify wiring and manage current limits.
Parallel two outputs to double current capacity (same group only).
Redundant control possible – parallel outputs for fail-safe loads.
Monitor ambient temperature. Reduce current above 40°C.

Package Contents

1x Siemens 6ES7422-1BL00-0AA0 SM 422 module
1x front connector (screw type)
1x labeling strip
1x manual (digital download)
Shipping: 12-24 hour dispatch via FedEx, UPS, or DHL

Frequently Asked Questions

Q: Can I use this module with 120V AC loads?
- A: No. This module provides 24V DC outputs only. Use a relay between this output and AC loads.
Q: What happens if I short an output?
- A: The module shuts down that output electronically. It recovers automatically after the fault clears.
Q: Can I connect two outputs together for more current?
- A: Yes, but only outputs within the same group. This gives you up to 1A total current.
Q: Does this module have diagnostic alarms?
- A: No. The 6ES7422-1BL00-0AA0 does not include diagnostic functions. Use the 6ES7422-1BH00-0AA0 if diagnostics are needed.
Q: How many modules can I install in one rack?
- A: Depends on your CPU and power supply. The S7-400 supports up to 8 modules per rack.