Page 3-1
Manual 00650-519-1
Chapter 3: Option Selection
The following paragraphs describe the functions of the various jumpers on the RS422I-PA card.
Refer to Figure 3-1, Option Selection Map for the locations of these jumpers on the card.
Address Selection
DIP switches A3 through A9 set the card's base address on the I/O bus. See the Address Selection
section of this manual to follow.
IRQ2 Through IRQ15
Place a jumper at the location that corresponds to the IRQ level that you desire. If the card is
installed in a short, eight-bit slot, the higher interrupts IRQ10 through IRQ15 will not be usable.
485 and 422
A jumper at the "485" location sets the card in RS485, Half-Duplex, automatic RTS mode. A
jumper at the "422" location sets the card in RS422, Full-Duplex mode.
Baud x1 and Baud x4
Placement of this jumper controls baud rate. The "x1" position permits baud rates up to
115.2Kbaud and the "x4" position permits baud rates up to 460.8Kbaud.