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DR4300 Circular Chart Recorder
DR4300 Circular Chart Recorder Product Manual 12/03
36
7
TB2
TB1
7
TB2
TB1
Main PCA
Pen 2
Main PCA
Pen 1
Communication PCA
Communications master
J3
SHLD
Tx–/
Rx–
Tx+/
Rx+
To other
communications
instruments
(Maximum 15)
Optional communication
120 Ohm
Resistor
See
Note
Place 120 Ohm Resistor on
last device, between Tx+/Rx+
and Tx–/Rx–.
+
_
24822
NOTE: The shield of the
communication cable is connected
to ground at the recorder end, and
should not extend into the recorder
enclosure.
Figure 2-13 Communication Wiring