SERVO
PRO NANOCHROME Gas
Analyser
103
04416001A / Revision 7
the high-resolution chromatogram, giving the current reading of the GC cell as it
progresses through a cycle.
Figure 53 : 4-20 mA schematic and external connections
#
Name
Positive pin
Negative pin
Associated
fuse
1
4-20 mA #1
1+
1-
F1
2
4-20 mA #2
2+
2-
F2
3
4-20 mA #3
3+
3-
F3
4
4-20 mA #4
4+
4-
F4
5
4-20 mA #5
5+
5-
F5
6
4-20 mA #6
6+
6-
F6
7
4-20 mA #7
7+
7-
F7
8
4-20 mA #8
8+
8-
F8
9
HR
HR+
HR-
F9
Table 24 : 4-20 mA connections and associated fuses
WARNING
The analogue output terminals are separated from the analyser
mains circuits by reinforced insulation. The terminals must only be
connected to circuits that are themselves separated from mains
voltages by an equivalent isolation method.
6.2.4 RS-485 port
The RS-485 port is only to be used to communicate with other analyser chassis.
It is not designed to interface with third party systems. Multiple chassis need to
be connected using shielded D-sub HD15 Male/Male cable.
