![](/images/new-backgrounds/1263229/26322921x1.webp)
Selection of Operating Mode
The hardware address and IRQ is set by the Windows Operating System using driver information files and the Plug and Play OS.
The Operating Mode is set using Jumpers, Device Manager Driver Settings and by your cable connections and software.
Set the Jumpers
Set the 3 JP1 Jumpers to match your Operating Mode.
Jumpers | ||||
|
| |||
JP1 Top | 232 | 422/485 | 422/485 | 422/485 |
| (Right) | (left) | (left) | (left) |
JP1 Middle | TX ENABLE | TX SD | TX SD | |
| No effect | (right) | (left) | (left) |
JP1 Bottom | RX ENABLE | RX ENABLE | RX SD | |
| No effect | (right) | (right) | (left) |
Table 1 – Jumper/Mode Table
The top jumper sets DB9 connections for either 232 or 422/485
RS-232 operation requires setting only the Top jumper.
The middle jumper sets the
The bottom jumper sets the
For more operating mode information, see the related chapter.
6 | Chapter 2 | Documentation Number |
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph