SIEMENS 6ES7421-7BH01-0AB0 SIMATIC S7-400 digital input module
Product Overview
The SIEMENS 6ES7421-7BH01-0AB0 is a digital input module for the SIMATIC S7-400 series, designed to acquire binary signals from field devices and deliver them reliably to the PLC. It enables real-time monitoring of switches, sensors, and other digital inputs, providing fast, accurate signal processing for complex industrial automation systems.
Engineered for high reliability in harsh industrial environments, the module maintains performance under electrical noise, temperature variations, and vibration.
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Specifications
| Parameter | Specification |
|---|---|
| Model | 6ES7421‑7BH01‑0AB0 |
| Module Type | Digital Input (SM 421) |
| PLC Series Compatibility | SIMATIC S7‑400 |
| Number of Inputs | 16 inputs |
| Input Voltage | 24 V DC |
| Rated Operating Range | 20.4 – 28.8 V DC |
| Input Signal "0" Range | –30 V to +5 V DC |
| Input Signal "1" Range | 11 V to 30 V DC |
| Input Current (typ.) | ~6 mA per input |
| Input Delay | 0.05 ms (parameterizable) |
| Isolation | Galvanic isolation between inputs and backplane |
| Backplane Bus Consumption | max. 130 mA @ 5 V DC |
| Field Supply Consumption | max. 120 mA @ 24 V DC |
| Power Dissipation | ~5 W |
| Max Cable Length (shielded) | 1000 m |
| Max Cable Length (unshielded) | 600 m |
| Diagnostics | Configurable; alarms and status information |
| Operating Temperature | 0 °C to +60 °C |
| Protection Rating | IP20 |
Key Features & Advantages
- High-Speed Input Processing: Fast response to digital signal changes for real-time control.
- Reliable Signal Detection: Stable operation even in electrically noisy environments.
- Seamless Integration: Compatible with SIMATIC S7-400 PLC systems.
- Compact Modular Design: Optimized for high-density installation in control racks.
- Continuous Operation: Built for 24/7 industrial automation processes.
- LED Status Indicators: Quick visual confirmation of input states.
- Reduced Maintenance: Minimal field intervention required for reliable operation.
Installation & Configuration Guidelines
- Mount on DIN rails following Siemens recommended practices.
- Ensure proper signal wiring and grounding to prevent interference.
- Configure via STEP 7 or TIA Portal to assign addresses and input parameters.
- Test digital input channels before commissioning for accurate signal mapping.
- Use diagnostic tools for monitoring module performance and input integrity.
Welcome to Inquiry Below
Bently Nevada 330180-X1-CN MOD:145193-09
Bently Nevada 330180-X1-CN MOD:145004-141
Bently Nevada 330180-X1-CN MOD:143416-29
Bently Nevada 330180-X1-05 MOD:145004-57
Bently Nevada 330180-X1-05 MOD:143945-05
Bently Nevada 330901-10-25-10-02-00
Bently Nevada 330900-50-00
Bently Nevada 330878-90-00
Bently Nevada 330878-50-00
Bently Nevada 3500/23E
Bently Nevada 3500/22M 288055-01
Bently Nevada 3500/22M 138607-01
Bently Nevada 3500/20 125744-02
Bently Nevada 3500/20
... .... ...
FAQ
Q1: What types of devices can this module monitor?
It can monitor switches, pushbuttons, proximity sensors, and relay contacts providing binary signals.
Q2: Can it operate in harsh industrial environments?
Yes. Designed to withstand electrical noise, vibration, and temperature fluctuations while maintaining reliable input detection.
Q3: How fast does the module respond to signal changes?
It supports high-speed input processing for real-time control applications.
Q4: How is it integrated with SIMATIC S7-400 PLCs?
Using standard STEP 7 or TIA Portal configuration, digital inputs are mapped directly to the PLC's I/O addresses.
Q5: Is maintenance intensive?
No. The module requires minimal maintenance, primarily visual checks and occasional diagnostics.
Q6: Which industries commonly deploy this module?
Used widely in factory automation, process control, material handling, building automation, and utilities.
Q7: Can it handle high-density I/O installations?
Yes. Its modular, compact design supports installation in high-density PLC racks.
Q8: Does it provide status indicators?
Yes. LED indicators allow quick visual confirmation of input channel status.
Company
20 years supplying Original parts worldwide
DCS SYSTEM:
ABB,HIMA,Invensys Foxboro,Yokogawa,Invensys Triconex,Honeywell,Westinghouse,Emerson,Woodword
PLC SYSTEM:
Rockwell Allen-Bradley,Prosoft,Schneider Modicon,Bachmann,GE,Woodhead,Siemens
TSI SYSTEM:
Bently Nevada,EPRO,ENTEK
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