GE EPM 5300 Instruction Manual page 25

RS-485 Hookup Diagram (4 wire) Full Duplex
RS-485
Communications Port
Model#SF485DB
Note: This does not
represent a twisted pair. It
shows the cross-over from R
to T between the Unicom
and the rest of the bus.
RS-485
RS-232
Figure 4.5: 4-Wire RS-485 Communication Connection Installation full duplex
Connecting 4-Wire bus to RS-485 Port:
•
Connect the T- wire of the Unicom 2500 to the R- on the RS-485 port
•
Connect the R- wire of the Unicom 2500 to the T- on the RS-485 port
•
Connect the T+ wire of the Unicom 2500 to the R+ on the RS-485 port
•
Connect the R+ wire of the Unicom 2500 to the T+ on the RS-485 port
GE Multilin
UNICOM 2500
(Bottom View Shown)
—Detail view on following page
EPM 5000 series Advanced Power Meters
CHAPTER 4: COMMUNICATION INSTALLATION
5300P Instruments (rear view)
PC
R+ R- T+ T-
21