SUNRICH TECHNOLOGY IP-120 User manual

RS-422/485 PCIe Card
User Manual
Ver. 3.00
All brand names and trademarks are properties of their
respective owners.

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Contents:
Chapter 1: Introduction......................................................3
1.1 Product Introduction....................................................3
1.2 Features........................................................................3
1.3 System Requirements ..................................................4
1.4 Package Contents.........................................................4
Chapter 2: Getting Started .................................................5
2.1 Hardware Installation ..................................................5
2.2 PinAssignment............................................................5
2.3 Jumper Settings............................................................9
2.4 Driver Installation......................................................12
2.4.1 Installation for Windows XP/Vista/7/8...............12
2.4.2 Installation for Linux 2.6.x/3.x...........................14
Chapter 3: Troubleshooting Tips......................................14

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Chapter 1: Introduction
1.1 Product Introduction
RS-422/485 I/O series, a line of PCI Express Multi-port Serial
Communication Board, is designed to meet PCI Express Base
Specification 1.1. It can be installed in virtually any available PC
system and compatible with all major operating systems. Users do not
need to manually set jumpers to configure I/O addresses and IRQ
locations.
This boards offer independent RS-422 and RS-485 ports for
connecting kinds of serial terminals on the PC based systems. This
board is industrial stand which offer a reliable and high performance
solution for serial multi-port communications.
1.2 Features
Compliant with PCI Express Base Specification 1.1
Supports x1, x4, x8, x16 (lane) PCI Express Bus connector keys
Built-in 16C950 compatible UART

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128-bype deep transmit/receive FIFOs
Serial communication speeds up to 1Mbps
RS-422 and RS-485 auto detect and switching
Low profile form factor
±15KV ESD protection on all signal pins
2KV isolation protection for all signal and power (Isolation
version only)
Plug-n-Play, I/O address and IRQ assigned by BIOS
Support Windows XP/Vista/7/8, Linux 2.6.x/3.x
Note: Optical isolation (2000V) and embedded protection (max. ESD
of 16 KV, max. EFT of 2 KV) are available with certain models.
1.3 System Requirements
Windows® XP/Vista/7/8/10(32/64 bit), Linux 2.6.x/3.x
One available PCI Express slot
1.4 Package Contents
1 x RS-422/485 PCIe Card

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1 x Driver CD
1 x User Manual
1 x Fan Out Cable
Chapter 2: Getting Started
2.1 Hardware Installation
1. Turn off the power to your computer.
2. Unplug the power cord and remove your computer’s cover.
3. Remove the slot bracket from an available PCIe slot.
4. To install the card, carefully align the card’s bus connector with
the selected PCIe slot on the motherboard. Push the board down
firmly.
5. Replace the slot bracket’s holding screw to secure the card.
6. Replace the computer cover and reconnect the power cord.
2.2 Pin Assignment
The 2-ports and 4-ports RS-232/485 PCIe Cards have a female DB44
connector on the board. In this section, we give the on-board
connector’s pin assignments to facilitate making your own connection

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cable, and the male DB9 device-side pin assignments for the fan out
cable.
Male DB9 Connector: Device-side PinAssignments:
Pin
Transmission Signals
RS-422
4-Wire RS-485
2-Wire RS-485
1
Tx-
Tx-
D-
2
Tx+
Tx+
D+

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3
Rx+
Rx+
4
Rx-
Rx-
5
GND
GND
GND
Female DB44: Board-side Pin Assignments:
2-Port RS-422/485 PCIe Card:
RS-422 or 4-Wire RS-485
Port
Signal
1
2
Tx+
1
29
Tx-
2
30

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Rx+
31
12
Rx-
32
28
GND
GND
GND
2-Wire RS-485
Port
Signal
1
2
D+
1
29
D-
2
30
GND
GND
GND
4-Port RS-422/485 PCIe Card:
RS-422 or 4-Wire RS-485
Port
Signal
1
2
3
4
Tx+
1
29
27
6
Tx-
2
30
23
20
Rx+
31
12
10
25

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Rx-
32
28
26
7
GND
GND
GND
GND
GND
2-Wire RS-485
Port
Signal
1
2
3
4
D+
1
29
27
6
D-
2
30
23
20
GND
GND
GND
GND
GND
2.3 Jumper Settings
For RS-422/485 serial communications, when an electrical signal
travels through two different resistance junctions in a transmission line,
the impedance mismatch will sometimes cause signal reflection. Signal
reflection causes signal distortion, which it turn will contribute
communications errors. The solution to this problem is to establish the

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same impedance at the line ends as in the line itself by terminating
them with resistors
Ideally, the two ends of the cable will have a termination resistor
connected across the two wires. Without termination resistors,
reflections of the fast driver edges can cause multiple data edges that
can cause data corruption. Termination resistors also reduce electrical
noise sensitivity due to the lower impedance, and bias resistors (120
ohms for twisted pairs) are required. The value of each termination
resistor should be equal to the cable impedance.
RS-422 or 4-Wire RS485 working model with termination resistor: