4 rs485 termination jumpers, Rs485 termination jumpers - 16, Rear i/o modules cp346 – Kontron CP346 User Manual
Page 70
Rear I/O Modules
CP346
Page 5 - 16
© 2005 Kontron Modular Computers GmbH
ID 27253, Rev. 03
P R E L I M I N A R Y
5.2.4
RS485 Termination Jumpers
The CP-RIO3-46-OPT offers onboard one 120 ohm termination resistor per channel which can
be used to terminate the differential line pairs in case the serial channel is a beginning or end
node of a RS485 two-wire network.
19
TRxD+
3
3
44
TRxD-
8
20
—
—
45
—
—
21
—
1
46
—
6
22
—
—
47
—
—
23
—
7
48
—
4
24
GND
5
49
—
2
25
—
—
50
—
Table 5-6: Termination Jumper Settings for CP-RIO3-46-OPT
CHANNEL
SETTING
DESCRIPTION
0
1
2
3
J1
J3
J5
J7
Open
(default)
No 120 ohm termination
Set
120 ohm termination between the differential lines
Termination between TRXD± in half duplex mode.
Table 5-5: Pinouts of Front Panel Adapter Connectors (Sheet 2 of 2)
50-Pin Row
Connector
RS422/RS485
Half Duplex
9-Pin Row
Connectors
Channel