Skip to main content
Log in
Siemens 6AG1278-4BD32-2XB0 — PLC I/O & Expansion Modules

Siemens 6AG1278-4BD32-2XB0 SIPLUS S7-1200 SM 1278

MPN6AG1278-4BD32-2XB0
Active

Siemens SIPLUS S7-1200 SM 1278, signal module, 4xIO-Link master V1.1, conformal coating, -40…+70 °C, 24 VDC, 1 W typ. power loss, IP20, requires front connector.

Siemens 6AG1278-4BD32-2XB0 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

6AG1278-4BD32-2XB0 — Electrical
ParameterValue
Rated value (DC)24 V
Permissible range, lower limit (DC)20.4 V
Permissible range, upper limit (DC)28.8 V
Max.70 °C
Power loss (typ.)1 W
6AG1278-4BD32-2XB0 — Performance
ParameterValue
Diagnostics functionYes
6AG1278-4BD32-2XB0 — Environmental
ParameterValue
IP protection ratingIP20
Min.-40 °C
6AG1278-4BD32-2XB0 — Mechanical
ParameterValue
Height100 mm
Width45 mm
Depth75 mm
Weight (approx.)150 g

Product details

What this SIPLUS IO-Link master is

The 6AG1278-4BD32-2XB0: It operates on 24 VDC (20.4 V to 28.8 V permissible) and draws about 1 W typical power loss — a right-sized spec for the S7-1200 backplane.

IP20 rated, so it belongs inside a cabinet. It requires a front connector (sold separately) for field wiring — factor that into your BOM line.

The conformal coating and wide temperature range make it the go-to choice for environments with condensation, coolant mist, or salt spray — the standard 6ES7278-4BD32-0XB0 lacks that protection.

Frequently asked questions

Is 6AG1278-4BD32-2XB0 a suitable replacement for 6ES7278-4BD32-0XB0?

It is a drop-in functional replacement for harsh-environment applications.

Does 6AG1278-4BD32-2XB0 require a front connector?

Yes — a front connector is required for field wiring and is sold separately. Factor that into your BOM.

Is 6AG1278-4BD32-2XB0 compatible with Siemens S7-1200?

Yes — it is a SIPLUS S7-1200 SM 1278 signal module designed for the S7-1200 system, snapping onto the same DIN rail and communicating via the backplane bus.

MPN
6AG1278-4BD32-2XB0