Status Instruments DM4000U - Page 22

satisfactorily on some PCs over short distances. This is not a recommended
arrangement, but if required for evaluation, should be wired as follows.
3.5.1 BASIC CONNECTIONS
The diagram below shows the basic connections between the instrument and a Host
PC. The Tx and Rx signals are both differential, therefore they should be twisted
wires for best operation over long distances.
For multidrop operation, the instruments should be connected as shown below.
INSTALLATION
COMMUNICATIONS
1
2
3
4
5
6
7
8
GND
EN
TX-B
TX-A
RX-A'
RX-B'
GND
LINK
+5 TO +13V DC
Amplicon
Liveline
Model
485F25
1
2
3
4
5
485
CARD
SMART INDICATOR
VDC
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