Siemens 6ES7421-7DH00-0AB0 SIMATIC S7-400 SM 421 Digital Input Module
Price:
Negotiable
MOQ:
1
Delivery Time:
2-3 days
Brand:
Siemens
Product Description
Sinamics 6ES7421-7DH00-0AB0 Overview
The 6ES7421-7DH00-0AB0 is an optically isolated digital input module (SM 421) for the SIMATIC S7-400 controller platform. It provides 16 individually isolated digital input channels supporting a wide voltage range of 24–60 V UC (AC/DC), making it suitable for connecting standard switches and two‑wire proximity sensors (BEROs). Featuring configurable input delay, diagnostic interrupts, and alarm functions, this module ensures reliable signal acquisition in harsh industrial environments. It integrates seamlessly into S7-400 systems for factory automation, process control, and machinery monitoring applications.
Figure 1 shows the front panel of 6ES7421-7DH00-0AB0.
Quick Specs.
Table 1 shows the Quick Specs
| Item | Value |
|---|---|
| Type | Digital Input Module, SM 421 |
| Inputs | 16 DI, individually isolated |
| Voltage | 24–60 V UC (AC/DC) |
| Delay | 0.5–20 ms |
| For | SIMATIC S7-400 |
Detailed Specification
| Parameter | Detail |
|---|---|
| Order Number | 6ES7421-7DH00-0AB0 |
| Product Line | SIMATIC S7-400 |
| Input Type | 16 x digital input, opto-isolated |
| Nominal Input Voltage | 24 V to 60 V UC (AC/DC) |
| Input Current (ON) | 4 mA typical |
| Input Delay | 0.5 ms to 20 ms (adjustable) |
| Diagnostics | Diagnostic interrupt, alarm function |
| Connection | Screw/spring terminals |
| Dimensions | W×D×H = 25 mm × 210 mm × 290 mm |
| Weight | approx. 0.6 kg |
| Standards | RoHS compliant |
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Company
LonRise Equipment Co. Ltd.
Location
26Minyi Road, Xinqiao, Songjiang Industrail Zone Shanghai China
Contact Person
Laura