Two-Pair Wiring - Mitsubishi Electric FX2N-485-BD User Manual

FX -485-BD COMMUNICATION BOARD
2N
2.2.4

Two-pair Wiring

RS485/422 unit
R*1
SDA
SDB
R*1
RDA
RDB
SG
*2
Grounding of resistance 100 or less
*1 R is the terminating resistance. Connect the terminating resistance (330 Ω) between terminals SDA and SDB,
and terminals RDA and RDB.
*2 Shield of connect the 485BD to shielded twist-pair cable must be connected to ground (100 Ω or less).
When use parallel link, ground both side. When use no protocol or dedicated protocol, ground one side.
*3 Connect terminal FG to each terminal of the programmable controller main body grounded with resistance of
100 Ω or less. However, as for the computer link unit of the A series programmable controller, see the
manual of the computer link unit.
*4 When use RS232/485 or RS232/422 adapter, please the adapter use FX-485PC-IF.
MOUNTING AND WIRING
485BD FX -485ADP
(ON)
SDA SDA
SDB SDB
RDA RDA
RDB
RDB
LINK
SG
SG
*3
FG
A series programmable
controller ' s computer link unit
R*1
SDA
SDB
R*1
RDA
RDB
SG
*3
FG
2-5
2