Specifications

SDM-300L3 Satellite Modem Revision 0
Asynchronous Interface/AUPC MN/SDM300L3.IOM
11–19
11.4.3.6 Configuration #6 (Local EIA-485 [4-Wire] to Remote EIA-485
[2-Wire])
Table 11-8. Local EIA-485 (4-Wire) to Remote EIA-485 (2-Wire)
#6. Local End Modem Settings for EIA-485 (4-Wire)
Utility Interface Menu
ASYNC TX and RX Type EIA-485 (4-wire)
Configuration Interface Menu
ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6)
ASYNC TX and RX Length 7 bits
ASYNC TX and RX Parity Even
ASYNC TX Stop 2 bits
#6. Remote End Modem Settings for EIA-485 (2-Wire)
Utility Interface Menu
ASYNC TX and RX Type EIA-485 (2-wire)
Configuration Interface Menu
ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6)
ASYNC TX and RX Length 7 bits
ASYNC TX and RX Parity Even
ASYNC TX Stop 2 bits
Utility System Menu
Remote Baud Rate Equal to ASYNC TX and RX baud rate
Parity Even
Address 1 to 255
The local end cable connects the 25-pin female ASYNC connector (on either the
breakout panel or the Y cable) to the EIA-485 (4-wire) remote terminal (WYSE or laptop
computer). The pinout of the local cable is listed in the following table.
#6. Local End EIA-485 (4-Wire) Twisted Pair
9-Pin
Female Connector
25-Pin
Male Connector
TX+ 4 14 TX+
TX- 5 2 TX-
RX+ 8 16 RX+
RX- 9 3 RX-
The remote end cable connects the 25-pin female ASYNC connector (on either the
breakout panel or the Y cable) to the 9-pin female connector, J6, at the rear of the
modem. The pinout of the remote cable is listed in the following table.
#6. Remote End EIA-485 (2-Wire)
9-Pin
Male Connector
25-Pin
Male Connector
TX/RX+ 4 14, 16 TX+, RX+
TX/RX- 5 2, 3 TX-, RX-