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Page 13
Chapter 2: Overview
RS-422/485 Port
The RS-422/485 Port is used to interface the MDR100A-R5 or MDR112A-R5 to a DTE with the same interface type. Either the
RS-232 or RS-422/485 interface is used for data traffic.
Vin+/Vin– is used to power the unit. The input Voltage range is 9–30 VDC.
Table 2-4. RS-422/485 port pinout.
Green Conn. Pin No.
Name
Input or Output
6
TxB (D+)
O
5
TxA (D-)
O
4
RxB (R+)
I
3
RxA (R-)
I
2
Vin -
—
1
Vin +
I
CAUTION: Using a power supply that does not provide proper voltage may damage the modem.
