Rs485 Serial Communication; 1: Rs485 Wiring Fundamentals (Port 1 & Port 4) - Electro Industries Nexus 1262 Installation & Operation Manual

Magnetic
Coupler

5.3: RS485 Serial Communication

5.3.1: RS485 Wiring Fundamentals - (Port 1 and Port 4)
Shield: It is not an earth-ground connection. You must also connect the shield to earth-
S
ground at one point. Do not connect the shield to ground at multiple points; it will inter-
fere with communication.
Two-wire, RS485 communication terminals: Connect the A(+) terminal of the Meter
A(+)/B(-)
Port to the (+) terminal of the device. Connect the B(-) terminal of the Meter Port to the
(-) terminal of the device.
e
Electro Industries/Gauge Tech
Figure 5.3: A7Z Communiation Interface
Doc # E151701
RS232
Connection
5-3