Installation and Configuration
Communications
Table 2.6 Jumper/Pin Settings for DTR/DSR Flow Control (Default)
| Jumper Connections | RS-232 Connector Pin |
DTR (Input to RS-232) | J218 to 2-4 and 1-3 | 4 |
| | |
DSR (Output to RS-232) | J217 to 3-5 and 4-6 | 6 |
| | |
Connections Use a 9-pin (DB9) to 9-pin parallel cable to connect the interface card to the serial port on the host computer. If you need to use a 25-pin connector (DB25) on the host interface, ensure the correct connections are made by referring Table 2.7. If the proper cables are not available and you need to change the transmit/receive pin configuration, see “Transmit / Receive Pin Selection”.
Table 2.7 Default Transmit/Receive Pin Connections
Power Supply (DCE) | | Host Computer (DTE) |
| | 9-pin connector |
| | |
Pin 2 | transmits to | Pin 2 (Receive) |
| | |
Pin 3 | receives from | Pin 3 (Transmit) |
| | | |
Pin 5 (Ground) | connects to | Pin 5 | (Ground) |
| | |
| | 25-pin connector |
| | | |
Pin 2 | transmits to | Pin 3 | (Receive) |
| | | |
Pin 3 | receives from | Pin 2 | (Transmit) |
| | | |
Pin 5 (Ground) | connects to | Pin 7 | (Ground) |
| | | |
Transmit / The RS-232 interface can use either pin 2 or pin 3 of the RS-232 connector to Receive Pin transmit or receive data. You can set the pin orientation you want by changing Selection the position of the J216 jumper on the interface PCB. Table 2.8 shows the
transmit/receive pin selection on the RS-232 connector in relation to the settings of the J216 jumper. See Figure 2.3, “RS-232 Interface PCB” on page 22 to locate jumper J216.
Table 2.8 Jumper Settings for Transmit/Receive Pin Selection
| Jumper J216 Connections | RS-232 Connector Pin |
Transmit (TXD) | 4-6 (default) | 3 |
| 4-2 | 2 |
Receive (RXD) | 3-1 (default) | 2 |
| 3-5 | 3 |
26 | Operating Manual for RS-232 for XHR/XFR Series Power Supply |
