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Siemens 6ES7421-1BL01-0AA0 SIMATIC S7-400 SM 421 32DI 24V DC Digital Input PLC I/O Module

% $-564.08
Siemens 6ES7421-1BL01-0AA0 S7-400 SM 421 Digital Input Module - 32DI 24V DC
Siemens 6ES7421-1BL01-0AA0 S7-400 SM 421 Digital Input Module - 32DI 24V DC

Siemens 6ES7421-1BL01-0AA0 SIMATIC S7-400 SM 421 32DI 24V DC Digital Input PLC I/O Module

Brand: Siemens
Reference No: 6ES7421-1BL01-0AA0
Catalog No: 6ES7421-1BL01-0AA0
Series: SIMATIC S7-400
Tariff Code (HS): 85389091
Rated Voltage: 24 V
Stock: 0
Delivery time: 10-15 business day(s)
Shipping Origin: Türkiye EXW
$564.08

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  • Description

The Siemens 6ES7421-1BL01-0AA0 is a SIMATIC S7-400 digital input module SM 421 with 32 isolated inputs rated 24 V DC, IEC 61131 Type 1 characteristic. It draws 20 mA from the backplane bus, dissipates 6 W typical, and isolates the 32 channels from the backplane bus and from each other in one group.

Technical Specifications

Order Number 6ES7421-1BL01-0AA0
Brand Siemens
Series SIMATIC S7-400
Product Designation SM 421
Number of Digital Inputs 32
Input Characteristic (IEC 61131) Type 1
Rated Input Voltage 24 V DC
Input Voltage for Signal 0 -30 V DC to +5 V DC
Input Voltage for Signal 1 13 V DC to 30 V DC
Input Current for Signal 1, typ. 7 mA
Input Delay, 0 to 1 / 1 to 0 1.2-4.8 ms / 1.2-4.8 ms
Cable Length, Shielded / Unshielded, max. 1,000 m / 600 m
2-Wire Sensor Connection Yes, max. 1.5 mA quiescent current
Potential Separation Between Channels Yes, in groups of 32
Isolation Test Voltage 500 V AC / 707 V DC, type test
Input Current from Backplane Bus 5V DC, max. 20 mA
Power Loss, typ. 6 W
Dimensions (W x H x D) 25 mm x 290 mm x 210 mm
Net Weight 0.77 kg

Selection Notes

All 32 channels share a single isolation group, so this variant fits applications where the field-side 24 V DC supply is common across the whole module rather than segmented by group. The Type 1 IEC 61131 characteristic and 1.2-4.8 ms input delay match standard 24 V sensors and switches; where field devices run on 120 V AC/DC instead, the 120 V-rated SM 421 in the same family is the correct module, not this 24 V version.

Technical Details

Short Description
SIMATIC S7-400 SM 421 digital input module, 32 DI, 24V DC, isolated, Type 1 per IEC 61131.
Rated Voltage (VAC)
24 V
Mounting Type
Rack
Catalog No
6ES7421-1BL01-0AA0
Delivery Date (Days)
10-15 days
Model Number
6ES7421-1BL01-0AA0
Tariff Code
85389091

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