Product Description; Validity; Function - Pepperl+Fuchs KFD2-SCD2-Ex LK Series Manual

Functional Safety KFD2-SCD2-Ex*.LK, HiD2038

Product Description

2 Product Description
2.1

Validity

This manual is only valid for devices with a part number greater than #295000.
Contact your Pepperl+Fuchs representative for information about older devices.
2.2

Function

General
This isolated barrier is used for intrinsic safety applications.
Digital signals are superimposed on the analog values at the field side or control side
and are transferred bi-directionally.
An open or short field circuit presents a high impedance to the control side to allow
alarm conditions to be monitored by the control system.
KFD2-SCD2-Ex1.LK
The device drives SMART I/P converters, electrical valves, and positioners in hazardous
areas.
Current transferred across the DC/DC converter is repeated at terminals 1 and 2.
Terminals 2 and 3 are used when no short circuit detection is required.
If the HART communication resistance in the loop is too low, the internal resistance
can be used.
Test sockets for the connection of HART communicators are integrated into the terminals
of the device.
A fault is signalized by LEDs and a separate collective error message output.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.
KFD2-SCD2-Ex2.LK
The device drives SMART I/P converters, electrical valves, and positioners
in hazardous areas.
Current transferred across the DC/DC converter is repeated at terminals 1, 2 and 4, 5.
Terminals 2, 3 and 5, 6 are used when no short circuit detection is required.
If the HART communication resistance in the loop is too low, the internal resistance
can be used.
Test sockets for the connection of HART communicators are integrated into the terminals
of the device.
A fault is signalized by LEDs and a separate collective error message output.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.
8