Pepperl Fuchs KFD2-STC4-Ex1.2O.H Technical Data

SMART Transmitter Power Supply

3

Zone 0, 1, 2
Div. 1, 2

KFD2-STC4-Ex1.2O.H

3

5-

6+

1+

2-

7-

8+

9

250 

HART

HART

mA

mA

HART

10-

11+

12

250 

HART

24 V DC

14+
15-

Power Rail

24 V DC

I

II

Zone 2

Div. 2

Germany: [phone]Pepperl+Fuchs Group

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

USA: [phone] Singapore: [phone]

www.pepperl-fuchs.com [e-mail] [e-mail]

[e-mail]

KFD2-STC4-Ex1.2O.H

1-channel isolated barrier

<

24 V DC supply (Power Rail)

<

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

<

current sources
Signal splitter (1 input and 2 outputs)

<

Dual output 0/4 mA ... 20 mA

<

Terminal blocks with test sockets

<

High field voltage 17.6 V DC

<

Up to SIL 3 acc. to IEC 61508

<

Input 0/4 mA ... 20 mA2 x Output 0/4 mA ... 20 mA

Function

This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters with higher output voltage in a hazardous area, and can also be used with 2-wire
SMART current sources.
It transfers the analog input signal to the safe area as two isolated current values.
Digital signals may be superimposed on the input signal in the hazardous or safe area and are transferred bi-directionally.
If the HART communication resistance in the loop is too low, the internal resistance of 250 Ω between terminals 8 and 9 can be used.
Test sockets for the connection of HART communicators are integrated into the terminals of the device.

Connection

Technical Data

General specifications

Signal type Analog input

Functional safety related parameters

Safety Integrity Level (SIL) SIL 3

Supply

Connection Power Rail or terminals 14+, 15­Rated voltage U
Ripple within the supply tolerance
Power dissipation 1.9 W
Power consumption 2.5 W

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 283698_eng.pdf

r

20 ... 35 V DC

1

SMART Transmitter Power Supply KFD2-STC4-Ex1.2O.H

Germany: [phone]Pepperl+Fuchs Group

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

USA: [phone] Singapore: [phone]

www.pepperl-fuchs.com [e-mail] [e-mail]

[e-mail]

Technical Data

Input

Connection side field side
Connection terminals 1+, 2-, 3 or 5-, 6+
Input signal 0/4 ... 20 mA
Open circuit voltage/short-circuit current terminals 1+, 3-: 24.2 V / 38 mA
Voltage drop terminals 5, 6 : ≤ 2.4 V at 20 mA
Input resistance terminals 2-, 3: max. 76 Ω

Available voltage terminals 1+, 3: ≥ 17.6 V at 20 mA

Output

Connection side control side
Connection terminals 7-, 8+,9; 10-, 11+,12
Load 0 ... 550 Ω at 20 mA
Output signal 0/4 ... 20 mA (overload > 25 mA)
Ripple max. 50 µA

Transfer characteristics

Deviation at 20 °C (68 °F), 0/4 ... 20 mA

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)

Settling time 200 µs
Rise time/fall time 20 µs

Galvanic isolation

Output/power supply functional insulation, rated insulation voltage 50 V AC
Output/Output 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) , 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 1 II (1)G [Ex ia Ga] IIC , 1 II (1)D [Ex ia Da] IIIC , 1 I (M1) [Ex ia Ma] I
Input [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I

Supply

Maximum safe voltage U

Equipment terminals 1+, 3-

Voltage U
Current I
Power P

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 283698_eng.pdf

o

o

o

terminals 1+, 3: max. 500 Ω (250 Ω load)

rms

≤ 10 µA incl. calibration, linearity, hysteresis, loads and fluctuations of supply voltage

control side into the field side: bandwidth with 0.5 Vpp signal 0.3 ... 7.5 kHz (-3 dB)

250 V (Attention! The rated voltage can be lower.)

m

27.2 V
93 mA
632 mW

2