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Siemens 6ES7421-1EL00-0AA0 SIMATIC S7-400 SM 421 32DI 120V AC/DC Digital Input PLC I/O Module

% $-1,129.12
Siemens 6ES7421-1EL00-0AA0 S7-400 SM 421 Digital Input Module - 32DI 120V AC/DC
Siemens 6ES7421-1EL00-0AA0 S7-400 SM 421 Digital Input Module - 32DI 120V AC/DC

Siemens 6ES7421-1EL00-0AA0 SIMATIC S7-400 SM 421 32DI 120V AC/DC Digital Input PLC I/O Module

Brand: Siemens
Reference No: 6ES7421-1EL00-0AA0
Catalog No: 6ES7421-1EL00-0AA0
Series: SIMATIC S7-400
Tariff Code (HS): 85389091
Rated Voltage: 120 V
Stock: 0
Delivery time: 10-15 business day(s)
Shipping Origin: Türkiye EXW
$1,129.12

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  • Description

The Siemens 6ES7421-1EL00-0AA0 is a SIMATIC S7-400 digital input module SM 421 with 32 isolated inputs rated 120 V AC/DC, IEC 61131 Type 1 characteristic. It draws 200 mA from the backplane bus, dissipates 6.5 W typical, and isolates the 32 channels from the backplane bus in groups of 8.

Technical Specifications

Order Number 6ES7421-1EL00-0AA0
Brand Siemens
Series SIMATIC S7-400
Product Designation SM 421
Number of Digital Inputs 32
Input Characteristic (IEC 61131) Type 1
Rated Input Voltage 120 V AC/DC, 47-63 Hz
Input Voltage for Signal 0 0 to 20 V AC/DC
Input Voltage for Signal 1 79-132 V AC; 80-132 V DC
Input Current for Signal 1, typ. 2 mA (2-5 mA)
Input Delay, 0 to 1 / 1 to 0 5-25 ms / 5-25 ms
Cable Length, Shielded / Unshielded, max. 1,000 m / 600 m
2-Wire Sensor Connection Yes, max. 1 mA quiescent current
Potential Separation Between Channels Yes, in groups of 8
Isolation Test Voltage 1,500 V AC
Input Current from Backplane Bus 5V DC, max. 200 mA
Power Loss, typ. 6.5 W
Dimensions (W x H x D) 25 mm x 290 mm x 210 mm
Net Weight 0.773 kg

Selection Notes

Grouping isolation in blocks of 8 rather than a single 32-channel group lets separate 120 V field circuits share this module without cross-loading each other's return path, which the 24 V SM 421 variant (isolated as one group of 32) does not offer. The 120 V AC/DC rating and 79-132 V signal-1 window fit legacy 120 V field wiring directly; for 24 V DC sensors, the 24 V-rated SM 421 in the same family is the correct module.

Technical Details

Short Description
SIMATIC S7-400 SM 421 digital input module, 32 DI, 120V AC/DC, isolated in groups of 8.
Rated Voltage (VAC)
120 V
Mounting Type
S7-400 rack, 25mm module width
Catalog No
6ES7421-1EL00-0AA0
Delivery Date (Days)
10-15 days
Model Number
6ES7421-1EL00-0AA0
Tariff Code
85389091

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