GE EPM 5200 - Manual (Page 23)

CHAPTER 4: COMMUNICATION INSTALLATION
GE Multilin EPM 5000 series Advanced Power Meters 19
RS-485 Hookup Diagram (2 wire) Half Duplex (Closed Loop)
R
S
-232
R
S
-485
UNICOM 2500
(Bottom View Shown)
5300P Instruments (rear view)
RS-485
Communications Port
Model #SF485DB
Figure 4.3: 2-Wire RS-485 Communication Connection Installation half duplex (closed loop)