Serial RS-232
The Motherboard provides up to four (4) full RS-232 Standard 9-pin D-shell connectors via harnesses. All of the RS-232 ports have a shunt to select between +12V, +5V, or normal RI functionality.
Two Serial RS-232 ports (COM1 and COM2) are standard, and the others (COM3 and COM4) are available as a kit. For more information, refer to 7787-K496 Serial Cables (COM3/COM4).
Maximum power capability is 1.5A from any one port. The power outputs from the powered ports are protected by a self-healing fuse. These ports are marked on the rear I/O with the “lightning bolt” symbol to signify its powered capability.
In some cases, hot plugging RS-232 devices may cause the terminal to shut down unexpectedly by “crow barring” the power supply. However, this will not cause damage to the hardware. It is also important to note that RS-232 devices will not auto-detect like USB devices.
These ports are provided in four single DB9 panel mount cable assembly mounted on the rear I/O chassis.
| Pin | Signal Name |
|---|---|
| 1 | DCD |
| 2 | Serial In (SIN) |
| 3 | Serial Out (SOUT) |
| 4 | DTR– |
| 5 | GND |
| 6 | DSR– |
| 7 | RTS– |
| 8 | CTS– |
| 9 | RI OR +12V OR +5V |
