PowerLogic EGX200, Инструкционный бюллетень

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24 © 2001 Schneider Electric All Rights Reserved
Chapter 4—Installation and Wiring 63230-314-200/A2
Wiring Connections 8/2001
Daisy Chain Maximum Distances
The maximum daisy chain distance is determined by the baud rate and the types of
RS-485 devices (2-wire/4-wire) on the daisy chain. The RS-485 ports will support daisy
chains that fall within the specifications shown in Tables 4–1 and 4–2.
Table 4–1: 4-Wire Daisy Chain Maximum Distances
Baud Rate Max distance for 1–16 devices Max distance for 17–32 devices
1200 10,000ft (3,048m) 10,000ft (3,048m)
2400 10,000ft (3,048m) 5,000ft (1,524m)
4800 10,000ft (3,048m) 5,000ft (1,524m)
9600 10,000ft (3,048m) 4,000ft (1,219m)
19200 5,000ft (1,524m) 2,500ft (762m)
38400 5,000ft (1,524m) 1,500ft (457m)
Due to the volume of RS-485 devices in the field, this table is only to be used as a guide and was tabulated
based on POWERLOGIC 4-wire devices and POWERLOGIC 4-wire devices that support 2-wire devices.
Table 4–2: 2-Wire Daisy Chain Maximum Distances
Baud Rate Max distance for 1–8 devices Max distance for 9–16 devices
1200 10,000ft (3,048m) 10,000ft (3,048m)
2400 10,000ft (3,048m) 5,000ft (1,524m)
4800 10,000ft (3,048m) 5,000ft (1,524m)
9600 10,000ft (3,048m) 4,000ft (1,219m)
19200 5,000ft (1,524m) 2,500ft (762m)
38400 2,500ft (762m) 1,500ft (457m)
Due to the volume of RS-485 devices in the field, this table is only to be used as a guide and was tabulated
based on POWERLOGIC 4-wire devices and POWERLOGIC 4-wire devices that support 2-wire devices.