بریر KFD2-SCD2-EX2.LK

SMART Current Driver KFD2-SCD2-Ex2.LK

• 2-channel isolated barrier
• 24 V DC supply (Power Rail)
• Current output up to 700 Ω load
• HART I/P and valve positioner
• Line fault detection (LFD)
• Accuracy 0.05 %
• Terminal blocks with test sockets
• Up to SIL 2 acc. to IEC 61508

Function
This isolated barrier is used for intrinsic safety applications. It
drives SMART I/P converters, electrical valves, and
positioners in hazardous areas.
Digital signals are superimposed on the analog values at the
field or control side and are transferred bi-directionally.
Current transferred across the DC/DC converter is repeated at
terminals 1, 2 and 4, 5.
An open and shorted field circuit presents a high input
impedance to the control side to allow line fault detection by
control system.
If the loop resistance for the digital communication is too low,
an internal resistor of 250 Ω between terminals 8, 9 and 11, 12
is available, which may be used as the HART communication
resistor.
Sockets for the connection of a HART communicator are
integrated into the terminals of the device.
A unique collective error messaging feature is available when
used with the Power Rail system.