Network And Long Distance Communication - GE EPM 5300 Instruction Manual

4.3: Network of Instruments and Long Distance Communication
The RS-485 Transceiver is required for a large network of instruments.
•
In a two-wire connection, a maximum of 900 instruments can be included in the same network
(Figure 4.7)
•
In a four-wire connection, a maximum of 3600 instruments can be included in the same network
(Figure 4.8).
DEVICE 32 UNITS
DEVICE 32 UNITS
Figure 4.7: 2-Wire RS-485 Communication Installation Connection with Transceiver
DEVICE 32 UNITS
DEVICE 32 UNITS
Figure 4.8: 4-Wire RS-485 Communication Installation Connection with Transceiver
Use modems (dedicated or dial-up) when the instruments are located at great distances. However, set
the modem to auto answer at the recommended value of 1200 baud rate, if noise conditions exist. Also,
flow control must be disabled.
GE Multilin
CHAPTER 4: COMMUNICATION INSTALLATION
DEVICE
TRANSCEIVERS
DEVICE
DEVICE
TRANSCEIVERS
DEVICE
EPM 5000 series Advanced Power Meters
RS-485
TRANSCEIVER
(Acts as Repeater)
32
RS-485
TRANSCEIVER
(Acts as Repeater)
RS-485
TRANSCEIVER
(Acts as Repeater)
32
RS-485
TRANSCEIVER
(Acts as Repeater)
COMPUTER
COMPUTER
23