Pepperl+fuchs P+F KFD2-STC5-Ex1.H Isolated barrier Transmitter Power Supply

 

 

SMART Transmitter Power Supply KFD2-STC5-Ex1.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

Output 0/4 mA ... 20 mA current sink/current source

Terminals with test points

High field voltage 17 V DC

Up to SIL 2 acc. to IEC 61508

 

 

Function: KFD2-STC5-Ex1.H
 

This isolated barrier is used for intrinsic safety applications.

 

The device supplies 2-wire and 3-wire SMART transmitters, 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.

 

Digital signals may be superimposed on the input signal in the hazardous or non-hazardous area and are transferred bi-directionally.

 

The device provides a sink mode or a source mode output on the safe area terminals.

 

The device has an internal resistor. Use this resistor if the HART communication resistance in the control circuit is too low.

 

Test sockets for the connection of HART communicators are integrated into the terminals of the device.

Datasheet excerpt: Technical data of  KFD2-STC5-Ex1.H
General specifications
Signal type		Analog input
Functional safety related parameters
Safety Integrity Level (SIL)		SIL 2
Supply
Connection		Power Rail or terminals 14+, 15-
Rated voltage		18 ... 30 V DC
Ripple		within the supply tolerance
Power dissipation		≤ 1 W at maximum load
Power consumption		≤ 1.6 W at maximum load
Input
Connection side		field side
Connection		terminals 1+, 2-, 3
Input signal		0/4 ... 20 mA
Input resistance		max. 265 Ω terminals 2-, 3 , max. 330 Ω terminals 1+, 3
Available voltage		≥ 17 V at 20 mA , terminals 1+, 3-
Output
Connection side		control side
Connection		terminals 7+, 8-, 9- (sink)
		terminals 7-, 8+, 9+ (source)
		see additional information
Load		0 ... 800 Ω
Output signal		0/4 ... 20 mA (overload > 25 mA)
Ripple		max. 50 µA rms
External supply (loop)		2 ... 30 V DC

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