Doc# E107706 5 - 8
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
5.3.3: Using the Unicom 2500
The Unicom 2500 provides RS485/RS232 conversion. In doing so it allows the
Nexus® 1250/1252 meter to communicate with a PC or other device. See the Unicom
2500 Installation and Operation Manual for additional information. You can order the
Unicom 2500 from EIG’s webstore: www.electroind.com/store. Select the Communi-
cations Products category from the left side of the webpage.
Figure 5.7 illustrates the Unicom 2500 connections for RS485.
Figure 5.7: Meter Connected to PC using Unicom 2500
(+)
(-)
SH
(+)
(-)
SH
Jumpers:
Short TX(-) to RX(-) becomes (-) signal
Short TX(+) to RX(+) becomes (+) signal
TX(-) RX(-) TX(+) RX(+) SH
RS232 Port
UNICOM 2500
PC
Meter’s RS485 Port
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