Automation parts, worldwide supply
0
1 3

6ES7421-7DH00-0AB0

Siemens | 6ES7421-7DH00-0AB0 SM 421 Diagnostics Alarm

In stock (19 units), ready to be shipped

  • Manufacturer: Siemens

  • Product No.: 6ES7421-7DH00-0AB0

  • Product Type: Digital Input Module

  • Product Origin: DE

  • Payment:T/T, Western Union

  • Weight: 600g

  • Shipping port: Xiamen

  • Warranty: 12 months

30-Day Return Policy · 12-Month Warranty
  • Fast Delivery
  • 24/7 Support
  • Quality Assurance

Description

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

Siemens 6ES7421-7DH00-0AB0 is a SIMATIC S7-400 SM 421 digital input module with 16 isolated UC 24-60V inputs. Features parameterizable input delay, wire-break monitoring, diagnostics, and alarms. Weight approximately 600 g.

Key Specifications

Parameter Value
Article No. 6ES7421-7DH00-0AB0
Product Type Digital Input Module SM 421
Number of Inputs 16
Input Voltage Type AC/DC (UC)
Rated Value 24V to 60V UC (47-63 Hz)
Backplane Current (5V) 150 mA max
Power Loss 8W typ (3.5W @ 24V, 6.5W @ 48V, 8.0W @ 60V)
Weight Approximately 600 g

Input Specifications

Parameter Value
Signal "0" Voltage -6 to +6V DC / 0-5V AC
Signal "1" Voltage 15-72V DC / -15 to -72V DC / 15-60V AC
Input Current "1" 4 to 10 mA typical
Input Delay Parameterizable: 0.5 / 3 / 10 / 20 ms
Cable Length (Shielded) 1000 m max
Cable Length (Unshielded) 600 m max (3/10/20 ms), 100 m (0.5 ms)

Diagnostics & Isolation

Parameter Value
Diagnostics Function Yes, parameterizable
Wire-Break Monitoring Yes, I > 0.7 mA
Channel Separation Yes, between each channel
Isolation Test Voltage 1500 VAC
2-Wire Sensor Quiescent Current 0.5 to 2 mA max

Dimensions

Parameter Value
Width 25 mm
Height 290 mm
Depth 210 mm

FAQs

Q1: What input voltage range does the 6ES7421-7DH00-0AB0 support?
A1: UC 24V to 60V AC/DC at 47-63 Hz.

Q2: What input delay settings are available?
A2: Parameterizable at 0.5, 3, 10, or 20 ms.

Q3: How are the channels isolated?
A3: Each channel is individually isolated, tested at 1500 VAC.

Product Resources

📄 Download PDF
🏷️ Tags: Digital Input Module Siemens

Scalar (V/f)

Vector

AC-powered
  • Confirm the exact model, part number, and specifications before ordering.
  • Ensure compatibility with your current machinery or control systems.
  • Reach out via sale@etowonauto.com or +8617859788089 for technical assistance.
  • Review delivery options, lead times, and shipping requirements.
  • Follow manufacturer instructions and best practices during installation.

In-stock items are typically dispatched the same business day. For products not currently in stock, dispatch times may vary based on availability. International shipping is available, and shipping costs are calculated according to destination, weight, and carrier selection.

Returns are accepted within 30 days of receipt, provided items are unused and in original condition. Return shipping costs are the responsibility of the customer. Please contact us before returning any item to receive return authorization.

For more details, please review our Shipping & Return Policy.

 View Product Details

ENSURE RELIABLE MACHINERY PERFORMANCE

Transform your home with the latest multi-electronics solutions, from intelligent lighting to vOptimize your operations with the Bently Nevada 3500 Monitoring System, offering real-time vibration and machinery condition monitoring to prevent failures and maximize uptime.oice-controlled devices all designed to make life easier, safer, and more connected.

Purchase now
Step-by-step technical advice and buying tips for industrial automation parts.

Technical & Buying Guide

View all blog