6
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Power & Control Wiring For 12-30 VDC Supply
24VDC +
24VDC -
Ground
5
12-30 VDC Power
4-20mA Input
L
R
True Echo
Terminals
B/RX
A/TX
Network Node
Communication
Out -
Ground
A/TX
B/RX
DC Gnd
+
Supply Voltage
Process
Controller
8
7
6
1
4
3
2
Out +
4-20mA Output
Note: For 12-30 VDC sensors, terminal 7
is tied to terminal 4 inside sensor.
4-20 mA
CURRENT
LOOP
DB9
PRL/S
Te
rm
in
al
s
Red
1
2
3
4
5
6
7
8
9
WHT. or BLK.
SH
IE
LD
L1 8
L2/N 7
6
+ 5
-- 4
3
A/TX 2
B/RX 1
PR/S
T
erm
in
al
s
To PC
USB Port
Red
WHT. or BLK.
L1 8
L2 / N 7
6
+ 5
-- 4
3
A/TX 2
B/RX 1
RS485 to
USB
Converter
Shield
Communication Connection Diagrams for RS-232 and RS-485/Modbus
RS-485/Modbus Connection to PC
RS-232 Serial Connection to PC
IMPORTANT
: Shield wire for RS-485/Modbus must only be connected on one end. If
connecting at radar terminals, use terminal 3.
NOTE
: For RS-232 or RS-485 direct to PC wiring, see Communication Connection Dia
-
grams.
Recommended Wiring:
•
Power & Signal - 3 Conductor,
Shielded, 24 AWG, 300V.
•
Communication - 1 Shielded
Twisted Pair, 24 AWG, 300V.
