Nexus 1250 - Page 77

Doc# E107706 5 - 3
5: Communication Wiring
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Figure 5.3: Communication Wiring
NOTES:
• I/O Modules and External Displays require power connections to the +/- Voltage
terminals (dashed lines).
• For all communications: S=Shield. This connection is used to reference the Nexus®
meter’s port to the same potential as the source. It is not an earth-ground connec-
tion. You must also connect the shield to earth-ground at one point.
Vous devez également connecter l’écran à la terre à un moment donné.
RS232
Extension
Cable
1:1 Wiring
RT=
~120 Ohms
RT=
RT=
RT=
RT=
RT=
~120 Ohms
~120 Ohms
120 Ohms
~120 Ohms
~120 Ohms
+V- S - +
+V- S - +
+V- S - +
+V- S - +
8 7 6 5 4 3 2 1 0 - +
- -
+ - S -V+
+ + G
+ - S -V+
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