GE EPM 5300 User Manual download pdf (Page 25)

CHAPTER 4: COMMUNICATION INSTALLATION

GE Multilin EPM 5000 series Advanced Power Meters 21

RS-485 Hookup Diagram (4 wire) Full Duplex

T+ T-R-R+

UNICOM 2500

(Bottom View Shown)

RS-232

RS-485

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.

5300P Instruments (rear view)

RS-485

Communications Port

Model#SF485DB

Figure 4.5: 4-Wire RS-485 Communication Connection Installation full duplex

—Detail view on following page

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

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GE EPM 5300 User Manual Page 25