| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | GND |  |
Ground |
| 2 | +5V |  |
+5 VDC. Dont use this one, it may be converted into output handshake in later equipment. |
| 3 | GND | |
Ground |
| 4 | Tx+ | |
Transmit Data, positive going component |
| 5 | Tx- | |
Transmit Data, negative going component |
| 6 | +12V | |
+12 VDC |
| 7 | DSR/HSK |  |
Handshake input. Signal name depends on mode: Used for Flow Control or Clock In. |
| 8 | Rx+ | |
Receive Data, positive going component |
| 9 | Rx- | |
Receive Data, negative going component |
a. When connecting to an RS-232 device, use HSKi with data set ready (DSR) or other handshaking signals, depending on the device to be connected.
