StarTech.com RS-485/422 instruction manual Installation, Jumper Settings

Installation

WARNING! PCI cards, like all computer equipment, can be severely damaged by static electricity. Be sure that you are properly grounded before opening your computer case or touching your PCI card. StarTech.com recommends that you wear an anti-static strap when installing any computer component. If an anti-static strap is unavailable, discharge yourself of any static electricity build-up by touching a large grounded metal surface (such as the computer case) for several seconds. Also be careful to handle the PCI card by its edges and not the gold connectors.

Jumper Settings

The two sets of jumpers on this card (J4, J3 and PORT1_RT, PORT2_RT) are used to configure the operating mode/serial protocol and 2/4-wire operation respectively.

RS422 Operation

Jumper	Pin	Signal
	1	TxD+
	2	TxD-
	3	RxD+
(RS422)	4	RxD-
	5	GND

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