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MAN0488.PM6 Issue 02
4 - 20mA to Catalytic Converter
04200-M-5012
2. INSTALLATION
2.1
CONNECTIONS
Four pairs of terminals are provided to allow connections to the detector and to
the control system bridge input circuit. These are:
Terminal
Signal
Description
A
4 - 20mA
4 - 20mA input from the detector.
B
01
Centre output to the control system bridge circuit.
C
S
Most positive output to the control system bridge circuit.
D
NS
Most negative output to the control system bridge
circuit.
E
+24V Out
+24V to the detector.
F
+24V In
+24V from the control system bridge circuit.
G
0V Out
0V to the detector.
H
0V In
0V from the control system bridge circuit.
Figure 2 shows a block diagram of these connections while the location of these
terminals are shown in Figure 3.
2.2
LINK SETTINGS
CAUTION
Never apply power to the module with BOTH LK1 and LK2 fitted. Only fit
ONE of these two links.
There are three links on the module which need to be configured before
commissioning the system. These are:
LK1 -
When fitted, sets the input signal reference to the supply 0V.
LK2 -
When fitted, sets the input signal reference to the most negative or
non sensitive (NS) line of the bridge circuit.
LK3 -
This is a dual link which determines the polarity of the output
signal voltage. This pair of links is always fitted and are fitted
either in a horizontal or vertical position dependent upon the required
polarity of the output signal.
To access the above links, remove the module front cover using a screwdriver to
prise the cover off the module.