DIGITAL-LOGIC AG
MSMX104 Manual V1.3
22
7 I
NTERFACE
O
UTPUT
7.1 RS422 Output
The Pin 1+2 of the RS422/RS485 connector must be connected to the host- receiver- inputs. The Pin 1
is the TX+ and must be connected to the RX+ of the host. The Pin 2 is the TX- and must be connected to
the RX- of the host computer.
The Pin 3 + 4 of the RS422/RS485 connector must be connected to the host transmitter data lines.
Only the receiver inputs of the MICROSPACE interface card MSMX104 is terminated with 100Ohms.
470Ohm
RX+ Input
100Ohm
From Host
RX- Input
470Ohm
ADM489
TX+ Output
To Host
TX- Output
ADM489
