C.11 Option 19: Second RS-232C Interface 139
C.11 Option 19: Second RS-232C Interface
C.11.1 General Description
Option 19 for the Model 1084A/B/C adds a second RS-232C port, allowing communications and
control via a second 9-pin connector on the rear panel. The second RS-232C port connector
is initially installed in units without the option. Option 19 requires the installation of internal
components.
C.11.2 Specification
Commands
All commands, which are available for the main RS-232C port on the Model 1084A/B/C, may be
used with Option 19. See Chapter 9 for list of RS-232 commands. Note that broadcast commands
supporting the main RS-232 port begin with the letter “B” and broadcast commands supporting
the second RS-232 port begin with the letter “O”. For example, to broadcast ASCII from the main
RS-232 port, type “B1.” To broadcast ASCII from the second RS-232 port, type “O1.”
RS-232 Connector Pin Locations
The connector pin locations of the RS-232 connector is as follows:
Pin Pin Definition
1 No Connection
2 Receive Data input (RXD)
3 Transmit Data output (TXD)
4 No Connection
5 Signal Common
6 No Connection
7 No Connection
8 No Connection
9 No Connection
Table C.4: Option 19, Second RS-232 Port Pin Locations
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