Moxa Technologies CP-118U - Manual (Page 10)

CP-118U User’s Manual Hardware Installation
2-2
CP-118U Block Diagram
135 mm [5.31 in]
82 mm
[3.23 in]
41.7 mm
[1.64 in]
MU860
CP-1
18U
121 mm
[4.76 in]
DIP Switch Settings
CP-118U has three onboard DIP Switch arrays, each with 8 switches, referred to below and on the
board (see the above block diagram) as S1, S2, and S3. The switches are used to select one of four
serial interfaces—RS-232, RS-422, 4-wire RS-485, 2-wire RS-485—for each of the eight ports.
Note that S3 selects between RS-232 and RS-422/485, S2 selects between RS-422 and RS-485,
and S3 selects between 2-wire and 4-wire RS-485.
Mode S1 S2 S3
RS-232 --- --- ON
RS-422 --- ON OFF
4-Wire RS-485 ON OFF OFF
2-Wire RS-485 OFF OFF OFF