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Siemens 6ES7 321-1BH02-0AA0 — Digital Input Modules

Siemens 6ES7 321-1BH02-0AA0 Digital Input Module, 16 Inputs,

MPN6ES7 321-1BH02-0AA0
End of Life

Siemens SIMATIC S7-300 digital input module, 6ES7 321-1BH02-0AA0, 16 inputs 24 V DC, 3.5 W, end-of-life.

$70.00Ref. price · indicative, final on quote
Siemens 6ES7 321-1BH02-0AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7 321-1BH02-0AA0 — Specifications
ParameterValue
Power3.5
Length1000
Weight200
Current in0.01 A
I/O channels16
Input_delay1.2 ms “ 4.8 ms
Isolation_type500 V DC
Dimensions_text40 x 125 x 120 mm
Supply voltage24
Connectable_encoders2-wire sensor

Product details

Electrical and physical fit

The 6ES7 321-1BH02-0AA0: Each input is rated for a signal "1" voltage of 13 to 30 V DC, with a typical current draw of 7 mA. The permissible input voltage range is 20.4 to 28.8 V DC. Input delay is fixed (non-parameterizable) at 1.2 ms minimum and 4.8 ms maximum for both off-to-on and on-to-off transitions. Isolation between channels and the backplane is tested at 500 V DC via optocoupler. Cable length is limited to 1 000 m shielded or 600 m unshielded. The module supports 2-wire sensors with a permissible quiescent current up to 1.5 mA. Status indication per channel is provided by a green LED.

Frequently asked questions

What is 6ES7 321-1BH02-0AA0's listed power consumption?

The module draws 3.5 W from the backplane bus (5 V DC), with a maximum current draw of 10 mA from the 5 V supply.

What is the maximum cable length for this input module?

Shielded cable up to 1 000 m is allowed; unshielded cable is limited to 600 m.

Will 6ES7 321-1BH02-0AA0 drop into a panel specified for 6ES7321-1BH02-0AA0 without rewiring?

Yes, the alternate MPN 6ES7321-1BH02-0AA0 refers to the same product. The module is identical in form, fit, and function.

MPN
6ES7 321-1BH02-0AA0