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Siemens 6AG1221-1BH32-4XB0 — PLC I/O & Expansion Modules

Siemens 6AG1221-1BH32-4XB0 SIPLUS S7-1200 DI 16x24VDC, -40..

MPN6AG1221-1BH32-4XB0
Active

Siemens SIPLUS S7-1200 digital input module, 6AG1221-1BH32-4XB0, 16 inputs 24V DC, IP20, -40°C to 70°C, 100x45x75 mm, active production.

$185.42 – $508.74Ref. price · indicative, final on quote
Siemens 6AG1221-1BH32-4XB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1221-1BH32-4XB0 — I/O
ParameterValue
Digital inputs16
6AG1221-1BH32-4XB0 — Electrical
ParameterValue
Rated value (DC)24 V
Permissible range, lower limit (DC)20.4 V
Permissible range, upper limit (DC)28.8 V
For signal "1"15 V DC at 2.5 mA
For signal "0"5 V DC at 1 mA
Current for signal "1" (typ.)4 mA
Max.70 °C
Power loss (typ.)2.5 W
Current consumption from backplane bus (5 V DC), max.130 mA
Current consumption from load voltage L+ (no load), max.4 mA; per channel
Max. cable length, shielded500 m
Max. cable length, unshielded300 m
6AG1221-1BH32-4XB0 — Performance
ParameterValue
ParameterizableYes
Diagnostic alarmYes
Diagnostics functionYes
6AG1221-1BH32-4XB0 — Environmental
ParameterValue
IP protection ratingIP20
Min.-40 °C
6AG1221-1BH32-4XB0 — Mechanical
ParameterValue
Height100 mm
Width45 mm
Depth75 mm
Weight (approx.)210 g

Product details

Module overview

The 6AG1221-1BH32-4XB0: 16 digital inputs at 24 V DC on a SIPLUS S7-1200 form factor. Diagnostics alarm and supply voltage monitoring come on board. Requires a front connector; order separately. Backplane bus draws 130 mA max at 5 V DC; typical power loss is 2.5 W. Supply voltage range is 20.4–28.8 V DC. Cable lengths: 300 m unshielded, 500 m shielded.

Environmental ratings

IP20 protection. Altitude derating: full temperature range up to 2 000 m; derate 10 K up to 3 500 m and 20 K up to 5 000 m. Fall height tested at 0.3 m five times in package.

Frequently asked questions

What is the operating temperature range of this module?

The module is rated for an ambient temperature range of -40°C to 70°C.

What supply voltage does the module require?

It requires 24 V DC nominal, with a permissible range of 20.4 V to 28.8 V DC.

How many digital inputs does it have?

It has 16 digital inputs, isolated in groups of 4.

MPN
6AG1221-1BH32-4XB0