TIP866-TM-10 User Manual Issue 1.5
Page 12 of 13
6 Jumper Configuration
Position
Function
1-2
3-4
Installed: 120R On Board Termination
for RS485 Mode active
Open: No On Board Termination for
RS485 Mode
5-6
7-8
Installed: 120R On Board Termination
for RS422 Modes active
Open: No On Board Termination for
RS422 Modes
9-10
Connection X9 Pin 2 Power Supply to
DB25 Pin 9
Figure 6-1
: Jumper Field Jn5
Jumper Configuration Notes:
There are 5 jumper fields per serial channel n (Jn1 to Jn5) (n = Serial Channel 1 to 8).
Jn1 to Jn4 are used to select the desired DB25 pin assignment and function as shown in the
DB25 pin assignment tables.
Only one jumper field of Jn1 to Jn4 must be installed at a time. A jumper field Jn1 to Jn4 is
installed by plugging all jumpers of the jumper field. Remove all jumpers from the other jumper
fields of the Jn1 to Jn4 group.
Channel 1 and 2 of the TIP866-TM-10 additionally support DCD, DTR, RI and DSR for the
TIP866-10.
Default configuration for TIP866-TM-10: all jumpers installed on Jn1 => RS232 DTE.
Jn5 is used for enabling an on board 120R termination resistor for the RS422 and RS485
modes.
If on board termination is desired, only one termination block of jumper field Jn5 must be
installed at a time. Either 1-2, 3-4 for the RS485 mode or 5-6, 7-8 for the RS422 modes. If RS232
modes are selected or on board termination is not desired, leave Jn5 1-2, 3-4, 5-6, 7-8 open.
Using the on board termination feature requires a +5V power supply at the X9 connector (2 pin
screw terminal).
Do not use the on board termination feature of the TIP866-TM-10 when connecting a TIP866-20
(RS422) because there are termination resistors on the TIP866-20 !
Support of +5V at pin 9 of the DB25 connector for channel 1 to 8 is jumper selectable (Jn5: 9-
10) and requires a +5V power supply at the X9 connector (2 pin screw terminal).
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