GHM DeltaOhm HD402 Series, Руководство по эксплуатации

Страница: 9 / 28

HD402…
- 9 -
V1.1
end of a network group, remove the termination placing the short jumper between the
“RT” and “OPEN” indications.
The cable shield must be connected to both line ends. The cable should have the fol-
lowing features:
•
Characteristic impedance: 120 ohm
•
Capacity: less than 50pF/m
•
Resistance: less than 100 ohm/km
•
Gauge: 0,22 mm
2
(AWG24) at least
The cable maximum length depends on baud rate and cable characteristics. Typically,
the maximum length is 1200 m. The data line must be kept separated from any power
lines in order to prevent interferences on the transmitted signal.
3.2 E
XAMPLE OF CONNECTION WITH THE INDICATOR CONTROLLER
HD9022
0…20 or 4…20 mA active current output
0…10 Vdc Voltage output
Power supply
Power supply