Specifications

8S RS232/422/485 PCI Express Expansion Module
5
Terminator Setting Table:
Switch Settings Description
Both RX+/RX- and TX+/TX-
Terminators are Disabled
(Default)
TX+/TX- Terminator
Enabled
TX+/TX- Terminator
Enabled
Both RX+/RX- and TX+/TX-
Terminators are Enabled
ON
1 2 3 4
RXTM
TXTM
N/A
N/A
To Enable/Disable the 120 Ohm
Termination Resistor between RX+ and RX-
To Enable/Disable the 120 Ohm
Termination Resistor between TX+ and TX-
Unused Pins
ON
1 2 3 4
RXTM
TXTM
N/A
N/A
ON
1 2 3 4
RXTM
TXTM
N/A
N/A
ON
1 2 3 4
RXTM
TXTM
N/A
N/A
ON
1 2 3 4
RXTM
TXTM
N/A
N/A