Passive Outputs - Mettler Toledo IND500x Installationsanleitung

2.4.7.2 Passive Outputs

Using the Discrete I/O option with passive outputs provides the ability to control high voltage solenoids or other
feeding equipment in the safe area through protective devices such as an intrinsically safe switch amplifier. The
external switch amplifier isolates the lines back to the terminal so they remain intrinsically safe while providing
switching of a higher AC or DC voltage. Entity values of the amplifiers must be compared to the terminal output
entity parameters. Cable capacitance and inductance must also be included.
Devices from two manufacturers that have been tested for correct operation with the terminal and can be
connected directly to the outputs as shown are:
Bartec
17-584D-200D/0000 (2 Channel, 24 V)
17-584D-110D/0000 (1 Channel, 24 V)
17-584D-120D/0000 (1 Channel, 120 V)
Pepperl & Fuchs
KFA6-SR2-Ex2.W (230 VAC)
KFA5-SR2-Ex2.W (115 VAC)
KFD2-SR2-Ex2.W ( 24 VDC)
One example of how to wire to the passive outputs using intrinsically safe switch amplifiers is shown in the
figure below.
Ex Area
Figure 23: Passive Output Connections
26 Installation​ ​
Safe Area
POWER SUPPLY
SWITCH
SUPP
AMPLIFIER
LOAD
SUPP
LOAD
SUPP
LOAD
IND500x