The Facilities Panel includes a standard RS-232 serial line equipped with hardware or software flow control. This port can be used to communicate to the system serial console or can be connected to external equipment for general communication purposes. When used for general communications, this port is referenced as device "/dev/com1" within the Guidance Programming Language (GPL).
The connector for this interface is a female DB9 (Figure 34-167) that has pin assignments compatible with standard PC "COM" ports. A straight through DB9 to DB9 cable can be used to connect the Guidance System to a PC.
Table 34-123 defines the pin assignments for this connector.
| Pin | Description |
|---|---|
|
1 |
Not used |
|
2 |
TXD - Transmit data |
|
3 |
RXD - Receive data |
|
4 |
Not used |
|
5 |
GND |
|
6 |
Not used |
|
7 |
CTS - Clear to send for hardware flow control |
|
8 |
RTS - Request to send for hardware flow control |
|
9 |
Not used |
|
Interface Panel Connector Part No |
DB9 Female Connector |
|
User Plug Part No |
DB9 Male Plug |