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Siemens 6ES7921-4BF00-0AA1

Front connector S7-400 for digital Pre-assembled with 4 round Cables 0.14 mm2

MPN: 6ES7921-4BF00-0AA1
Category: Front connector elements

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What is the Siemens 6ES7921-4BF00-0AA1?

Front connector S7-400 for digital Pre-assembled with 4 round Cables 0.14 mm2, L = 5.0 m for digital connection modules

Specifications

General

Technical Product Detail Page	https://i.siemens.com/1P6ES7921-4BF00-0AA1
target system	SIMATIC S7-400
suitability for use	Digital I/O modules
product brand name	SIMATIC Top connect
product type designation	Modular connection
product designation	Pre-assembled front connector

electrical data / header

operating voltage / at DC — rated value	24 V
operating voltage / at DC — maximum	30 V
current / rated value	1 A
continuous current / at DC / per plug-in contact / maximum	1 A
total current / maximum	4 A

connection method

number of poles	48; of the front connector
Product component / with shield	No
type of electrical connection / for connecting cable	Screw-type terminal
number of poles / at the 1st interface	Cable is directly connected
wire length / maximum	5 m; between front connector module and terminal module
position / of the terminal	at the top

standards, specifications, approvals

certificate of suitability / cULus approval	No
design tested acc. to type of protection / EEx e	No
overvoltage category	2
degree of pollution	2

ambient conditions

operating temperature	0 ... 60 °C
ambient temperature — during operation	0 ... 60 °C
ambient temperature — during storage	-30 ... +70

mechanical data

mounting type	direct mounting
length	5 m
width / of the enclosure	5 mm
color / of the enclosure	black
product feature / transparent	No
material / of the insulating body	other
net weight	1.6 kg
product component / required / end cover plate	No

further information / internet links

internet link — to website: Industry Mall	https://mall.industry.siemens.com
internet link — to web page: selection aid TIA Selection Tool	https://www.siemens.com/tstcloud
internet link — to web page: system cabling	https://siemens.com/simatic-top-connect
internet link — to website: Industry Online Support	https://support.industry.siemens.com

additional information

manufacturer's article number / of device connector / usable	replacement for S7-400 48 pole
other information	technical specifications apply to rated input voltage values and +25 °C ambient temperature (if not otherwise specified)
marketing text	The front connector for SIMATIC S7-400 for connection to a digital I/O module, assembled with 4 round cables 0.14qmm in length of 5m, is used for connection to the digital connection modules. This is plugged onto the module to be wired instead of the front connector.This modified front connector module is part of the fully modular connection of SIMATIC TOP connect for the fastest and safest system cabling. In addition to low wiring costs, error sources in cabling can be significantly reduced. Sensors and actuators from the peripherals are attached to the connection modules of SIMATIC TOP connect and linked to the SIMATIC S7-300 via connecting cable and front plug-in module.

Downloads & documentation

Official documents from Siemens, downloaded directly from the manufacturer.

Data sheets & manuals

Product data sheet 6ES7921-4BF00-0AA1PDF

6ES7921-4BF00-0AA1: frequently asked questions

When can 6ES7921-4BF00-0AA1 be shipped?

6ES7921-4BF00-0AA1 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up 6ES7921-4BF00-0AA1 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for 6ES7921-4BF00-0AA1 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 6ES7921-4BF00-0AA1, subject to availability and destination.