Pepperl Fuchs KFD2-STC4-Ex1

SMART Transmitter Power Supply

MPN: KFD2-STC4-Ex1
Category: K-System (DIN Rail Mounting)

Price and lead time confirmed within 1 business day

Request a Quote

1We check stock, condition and lead time
2You get a written quote by email
3Approve it and we ship — in-stock parts within 1 business day

12-month warranty (new) · 3-month (used/refurbished)
30-day returns, no restocking fee on unused parts
100% positive eBay feedback
Ships via

Have spare Pepperl Fuchs parts? We buy surplus →

What is the Pepperl Fuchs KFD2-STC4-Ex1?

1-channel isolated barrier

24 V DC supply (Power Rail)

Input 2-wire and 3-wire SMART transmitters and 2-wire SMART current sources

Output 0/4 mA ... 20 mA

Terminals with test points

Up to SIL 2 acc. to IEC/EN 61508

1-channel isolated barrier, 24 V DC supply (Power Rail), Input 2-wire and 3-wire SMART transmitters and 2-wire SMART current sources, Output 0/4 mA ... 20 mA, Terminals with test points, Up to SIL 2 acc. to IEC/EN 61508, Housing width: 20 mm, Number of channels: 1-channel, HART communication, Test sockets, Safety Integrity Level (SIL): SIL 2, Rated voltage: 20 ... 35 V DC, Field device: 2-wire transmitter, Field device [2]: 3-wire transmitter, Field device [3]: current source

Specifications

General specifications

Order code (Pepperl+Fuchs part number)	283672
Signal type	Analog input
Lifecycle	Active (current Pepperl+Fuchs product)

Functional safety related parameters

Safety Integrity Level (SIL)

SIL 2

Supply

Connection	Power Rail or terminals 14+, 15-
Rated voltage	20 ... 35 V DC Ur
Ripple	within the supply tolerance
Power dissipation	1.4 W
Power consumption	1.8 W

Input

Connection side	field side
Connection	terminals 1+, 2-, 3 or 5-, 6+
Input signal	0/4 ... 20 mA
Voltage drop	≤ 2.4 V at 20 mA (terminals 5, 6)
Input resistance	≤ 64 Ω terminals 2-, 3 ; ≤ 500 Ω terminals 1+, 3 (250 Ω load)
Available voltage	≥ 16 V at 20 mA terminals 1+, 3

Output

Connection side	control side
Connection	terminals 7-, 8+, 9
Load	0 ... 800 Ω at 20 mA
Output signal	0/4 ... 20 mA (overload > 25 mA)
Ripple	max. 50 µA rms

Transfer characteristics

Deviation	at 20 °C (68 °F), 0/4 ... 20 mA≤ 10 µA incl. calibration, linearity, hysteresis, loads and fluctuations of supply voltage
Influence of ambient temperature	0.25 µA/K
Frequency range	field side into the control side: bandwidth with 0.5 Vpp signal 0 ... 7.5 kHz (-3 dB) control side into the field side: bandwidth with 0.5 Vpp signal 0.3 ... 7.5 kHz (-3 dB)
Settling time	200 µs
Rise time/fall time	20 µs

Galvanic isolation

Output/power supply

functional insulation, rated insulation voltage 50 V AC

Indicators/settings

Display elements	LED
Labeling	space for labeling at the front

Directive conformity

Electromagnetic compatibility: Directive 2014/30/EU

EN 61326-1:2013 (industrial locations)

Conformity

Electromagnetic compatibility	NE 21:2011
Degree of protection	IEC 60529:2001
Protection against electrical shock	UL 61010-1:2012

Ambient conditions

Ambient temperature

-20 ... 60 °C (-4 ... 140 °F)

Mechanical specifications

Degree of protection	IP20
Connection	screw terminals
Mass	approx. 200 g
Dimensions	20 x 124 x 115 mm (0.8 x 4.9 x 4.5 inch) , (W x H x D) housing type B2
Mounting	on 35 mm DIN mounting rail acc. to EN 60715:2001

Data for application in connection with hazardous areas

EU-type examination certificate	BAS 99 ATEX 7060 X
Marking	II (1)G [Ex ia Ga] IIC , [exsign] II (1)D [Ex ia Da] IIIC , [exsign] I (M1) [Ex ia Ma] I
Input	[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Supply: Maximum safe voltage	250 V (Attention! The rated voltage can be lower.) Um
Equipment	terminals 1+, 3-
Voltage	25.4 V Uo
Current	86.8 mA Io
Power	551 mW Po
Internal capacitance	12 nF Ci
Internal inductance	0 mH Li
Equipment	terminals 2-, 3
Current	74 mA / 115 mA Io/Strom Ii
Current	115 mA Ii
Voltage	3.5 V Uo
Current	74 mA Io
Power	64 mW Po
Equipment	terminals 1+, 2 / 3-
Voltage	30 V Ui
Current	115 mA Ii
Voltage	25.4 V Uo
Current	115 mA Io
Power	584 mW Po
Equipment	terminals 5-, 6+
Voltage	30 V Ui
Current	115 mA Ii
Voltage	8.7 V Uo
Current	0 mA Io
Output: Maximum safe voltage	250 V (Attention! The rated voltage can be lower.) Um
Certificate	TÜV 99 ATEX 1499 X
Marking	II 3G Ex nA II T4 [device in zone 2]
Galvanic isolation: Input/Output	safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Galvanic isolation: Input/power supply	safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity: Directive 2014/34/EU	EN IEC 60079-0:2018+AC:2020 , EN IEC 60079-11:2024 , EN 60079-15:2010

International approvals

UL approval: Control drawing	116-0428 (cULus)
IECEx approval: IECEx certificate	IECEx BAS 04.0016X IECEx CML 15.0055X
IECEx approval: IECEx marking	[Ex ia Ga] IIC , [Ex ia Da] IIIC , [Ex ia Ma] I Ex nA IIC T4 Gc

General information

Supplementary information

Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.

Downloads & documentation

Official documents from Pepperl Fuchs, downloaded directly from the manufacturer.

Data sheets & manuals

CAD & dimension drawings

Certificates (10)

KFD2-STC4-Ex1: frequently asked questions

When can KFD2-STC4-Ex1 be shipped?

KFD2-STC4-Ex1 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 KFD2-STC4-Ex1 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 KFD2-STC4-Ex1 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 KFD2-STC4-Ex1, subject to availability and destination.