Siemens 6ES7421-7DH00-0AB0 SIMATIC S7-400 SM 421 Digital Input Module

Name: Siemens 6ES7421-7DH00-0AB0 SIMATIC S7-400 SM 421 Digital Input Module
Brand: LonRise Equipment Co. Ltd.
SKU: 6ES7421-7DH00-0AB0
Price: 377.00 USD
Availability: InStock

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Siemens 6ES7421-7DH00-0AB0 SIMATIC S7-400 SM 421 Digital Input Module

Large Image : Siemens 6ES7421-7DH00-0AB0 SIMATIC S7-400 SM 421 Digital Input Module

Product Details:

Place of Origin:	China
Brand Name:	Siemens
Certification:	CE
Model Number:	6ES7421-7DH00-0AB0

Payment & Shipping Terms:

Minimum Order Quantity:	1
Delivery Time:	2-3 days
Payment Terms:	T/T

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Siemens 6ES7421-7DH00-0AB0 SIMATIC S7-400 SM 421 Digital Input Module

Description

Product Name:	PLC Industrial Control	Part Number:	6ES7421-7DH00-0AB0
Shipment:	DHL	Condition:	New
Lead Time:	2-3 Days	WQR12038HBL:	1 Year
Keywords:	6ES7421-7DH00-0AB0
Highlight:	Siemens S7-400 digital input module , SM 421 PLC control module , SIMATIC S7-400 industrial input module

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.

Siemens 6ES7421-7DH00-0AB0 SIMATIC S7-400 SM 421 Digital Input Module 0

Siemens 6ES7421-7DH00-0AB0 SIMATIC S7-400 SM 421 Digital Input Module 1

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