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

PCI Express Board User’s Manual Hardware Installation
2-2
CP-118EL Dimensions
132 mm (5.20 in)
51.65
mm
(2.03
in)
MU860
TX2
RX1 RX2
Tx3
Rx3
Tx4
Rx4
Tx5 Tx6
Rx5 Rx6
Tx7
Rx7
Tx8
Rx8
TX1
DIP
1 2 3 4 5 6 7 8
ON
DIP
1 2 3 4 5 6 7 8
ON
DIP
1 2 3 4 5 6 7 8
ON
S1
S2
S3
Mode S1 S2 S3
RS-232
RS-422
ON
ON OFF
Mode S1 S2 S3
4-WIRE
RS-485
2-WIRE
RS-485 OFF OFF OFF
OFF ON OFF
46.9 mm (1.85 in)
64.41
mm
(2.54
in) 59.91
mm
(2.36
in)
121
mm
(4.76
in)
NOTE: Use JP1/2/3/4/5/6/7/8 to activate the Termination Resistors for ports 1/2/3/4/5/6/7/8.
Open Termination Resistor is NOT active
Short Termination Resistor is ACTIVE
DIP Switch Settings (CP-118EL only)
CP-118EL has three onboard DIP Switch arrays, each with 8 switches, shown as follows 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