BlueStorm Installation Guide, Connect Tech Inc.
the operating system is booted by the current driver/software RS-485 mode. The jumper is used to ensure that a port will power-on tri-stated. For example, the RS-485 mode selection in the Windows control panel will override this jumper setting once a port is opened.
The BlueStorm/LP RS-422/485 uses JC to configure Auto-485 mode, while the BlueStorm/SP Opto uses J1.
Note that on BlueStorm/LP RS-422/485 models the Auto 485 is a single jumper. The second site is not in use. See Figure 1 for the location of this jumper. On the BlueStom/SP Opto, the first position controls the first port pair, while the second position controls the second port pair.
Power-On Tri-state (BlueStorm/SP Models Only, Excludes BlueStorm/SP RJ-11)
BlueStorm/SP models offer a power-on tri-state similar to the Auto-485 mode listed above. The BlueStorm/SP will tri-state a port configured as RS-485 full duplex or RS-485 multi-drop slave. This is meant to ensure compatibility with our legacy Blue Heat/PCI cards for customers upgrading to the newer BlueStorm family.
Jumper J1 controls the power-on tri-state functionality. Install a jumper on the first location of the J1 in order to tri-state Port 1 at power-on, install a jumper on the second position of J1 to control Port 2, etc. Ports will not come out of tri-state until the driver opens the associated port and begins transmission.
Half Duplex and Multi-drop Slave modes require you to select the appropriate mode via software. Please refer to the readme.txt files found in the appropriate directories on the BlueStorm/LP/SP/SP Opto CD.
Connectors and Pinouts
Table 1: DB-25 Male Pinouts for BlueStorm/LP (2 Port Connector)
| Pin | Port | RS-232 | Signal | RS-422/485 | Signal | |
| No. | No. | Signal | Direction | Signal | Direction | |
| 1 | 2 | SG | signal gnd. | SR | signal ref. | |
| 2 | 1 | TXD | output | TXD- | output | |
| 3 | 1 | RXD | input | TXD+ | output | |
| 4 | 1 | RTS | output | RTS- | output | |
| 5 | 1 | CTS | input | RTS+ | output | |
| 6 | 1 | DSR | input | CTS- | input | |
| 7 | 1 | SG | signal gnd. | SR | signal ref. | |
| 8 | 1 | DCD | input | RXD+ | input | |
| 9 | 2 | TXD | output | TXD- | output | |
| 10 | 2 | RXD | input | TXD+ | output | |
| 11 | 2 | RTS | output | RTS- | output | |
| 12 | 2 | CTS | input | RTS+ | output | |
| 13 | 2 | DSR | input | CTS- | input | |
| 14 | | NC | no connect | NC | no connect | |
| 15 | | NC | no connect | NC | no connect | |
| 16 | | NC | no connect | NC | no connect | |
| 17 | | NC | no connect | NC | no connect | |
| 18 | | NC | no connect | NC | no connect | |
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