Functional Safety KFD0-CS-(Ex)*.54*, KFD0-CS-(Ex)*.56*
Product Description
201
8-06
7
2
Product Description
2.1
Function
General
The device is a current repeater that transfers a current signal from the control system to
the field device. The device may be mounted in Zone 2 explosion hazardous area.
The device is loop powered with a low voltage drop and permits detection of line faults by
the control system.
Devices with designation "Ex" are used for intrinsic safety applications. Devices without
the designation "Ex" are signal conditioners.
An open field circuit presents a high impedance to the control side to allow alarm conditions
to be monitored by control systems.
Additionally, the device transfers AC signals from the field device to the control system.
This transfer can be used as safety-relevant information channel for an alarm system.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.
KFD0-CS-(Ex)*.54*
The device repeats a 1 mA to 20 mA input signal from the control system to drive fire
and smoke alarms on the field side.
KFD0-CS-(Ex)*.56*
The device repeats a 1 mA to 40 mA input signal from the control system to drive
SMART I/P converters, valve actuators, and displays on the field side.
2.2
Interfaces
The device has the following interfaces.
•
Safety-relevant interfaces:
•
1-channel devices: input I, output I
•
2-channel devices: input I, input II, output I, output II
•
Non-safety-relevant interfaces: none
Note!
For corresponding connections see datasheet.
