Pepperl+Fuchs isolated barrier KFD2-STC4-Ex1

Pepperl+Fuchs isolated barrier KFD2-STC4-Ex1

SMART Transmitter Power Supply KFD2-STC4-Ex1

Pepperl+Fuchs isolated barrier KFD2-STC4-Ex1

Features
• 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 SIL2 acc. to IEC 61508

Pepperl+Fuchs isolated barrier KFD2-STC4-Ex1

Function
This isolated barrier KFD2-STC4-Ex1 is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters 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 an isolated current value. Pepperl+Fuchs isolated barrier KFD2-STC4-Ex1
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.


Application
The device KFD2-STC4-Ex1 supports the following SMART protocols:
• HART
• BRAIN
• Foxboro

General specifications
Signal type Analog input
Supply
Connection Power Rail or terminals 14+, 15-
Rated voltage UN 20 ... 35 V DC
Ripple within the supply tolerance
Power loss 1.5 W
Power consumption 1.9 W
Input
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 terminals 7-, 8+, 9
Load 0 ... 800 Ω
Output signal 0/4 ... 20 mA (overload > 25 mA)
Ripple ≤ 50 µA rms
Pepperl+Fuchs isolated barrier KFD2-STC4-Ex1

Detailed Models
P+F KCD2-SCD-1
P+F KCD2-SCD-EX1
P+F KCD2-SR-EX1.LB
P+F KCD2-SR-EX2
P+F KCD2-STC-1
P+F KCD2-STC-EX1
P+F KCD2-STC-EX1.2O
P+F KCD2-UT2-EX1
P+F KFA6-SR2-Ex1.W
P+F KFD0-SD2-Ex1.1045
P+F KFD2-CD2-EX1
P+F KFD2-CRG2-EX1.D
P+F KFD2-DWB-1.D
P+F KFD2-EB2
P+F KFD2-GU-1
P+F KFD2-GUT-Ex1.D
P+F KFD2-SCD2-EX2.LK
P+F KFD2-SH-EX1.T.OP
P+F KFD2-SOT2-Ex2
P+F KFD2-SR2-Ex1.W.LB
P+F KFD2-SR2-Ex2.W
P+F KFD2-ST2-Ex2
P+F KFD2-STC4-1
P+F KFD2-STC4-EX2 
P+F KFD2-STC4-Ex2
P+F KFD2-UT2-1
P+F KFD2-UT2-2
P+F KFD2-UT2-EX1
P+F KFD2-UT2-Ex2
P+F KFD2-VR4-EX1.26
Pepperl+Fuchs isolated barrier KFD2-STC4-Ex1

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