B&B Electronics Optically Isolated Single Port PCI Bus CE manual General Information, Introduction

Chapter 1: GENERAL INFORMATION

Introduction

The B&B Electronics 3PCIOSD1x single port isolated serial interface card is designed for IBM compatibles with a PCI Bus. The PCI design is Plug and Play compatible which allows the driver and Operating System to select the IRQ and addresses used by the card.

The 3PCIOSD1x cards offer exceptional setup flexibility with a mix of selectable operating modes. If you are writing your own applications, be sure the communications routine used supports Windows communication drivers and a wide range of COM ports.

Description

The isolated single port can be configured for RS-232, RS-422, or RS-485 data protocols. The RS-485 mode automatic Send Data Control feature transparently handles the enable and disable functions of the RS-485 transceiver. Buffered, high speed UARTs (16550A or 16850) make it ideal for high speed (modem) and multitasking applications.

Features

•IBM compatible, PCI Version 2.1 bus

•Supports baud rates to 460.8K baud with 4X clock option enabled

•Provides 2000 VDC minimum isolation on all lines from the DB- 25 male connector to the host computer

•High speed 16 byte FIFO 16550A UARTs (Model 3PCIOSD1A), 128 byte FIFO 16850 UARTs (Model 3PCIOSD1B)

•RS-485 Automatic Send Data Control or RTS control

•2-wire or 4-wire RS-485 operation (half or full duplex)

•120Ω Termination Select Jumper for RS-422/RS-485 Networks

•RS-232 Mode Signal lines: TD, RD, RTS, CTS, DTR, DSR, & DCD, and Signal Ground.

•2 Channel RS-422 Signal Lines: TD(A), TD(B), RD(A), RD(B) and Signal Ground.

Documentation Number 3PCIOSD1x-3903m Manual Chapter 1 1

•RS-485 Signal Lines: TD(A), TD(B), RD(A), RD(B) and Signal Ground. (Data A & Data B lines when wired for 2-wire operation.)

Specifications

Bus:		PCI bus version 2.1
Slot:		Requires one PCI slot
Dimensions:		6.9 x 4.2 in (17.5 x 10.7 cm)
I/O Connections:		One 25-pin male D-sub (DB25M) connector
OS Supported:		Windows 95, 98, 2000 and NT 4.0
Baud rates: 460.8K baud maximum in RS-232/422/485 modes
UARTs:	16550A 16 byte TX and RX buffers (3PCIOSD1A), or
	16850 128 byte TX and RX buffers (3PCIOSD1B)
Character length:		5, 6, 7, or 8 bits
Parity:		Even, odd or none
Stop bits:		1, 1.5, or 2

RS-232 Control/Data Lines Drivers/Receivers:

Device:	SP211H Transceiver
High level output voltage:	5.0 V minimum
Low level output voltage:	-5.0 V minimum
Output current limited to:	±25 mA
Input high threshold voltage:	1.7 V maximum
Input low threshold voltage:	0.8 V minimum
Device will withstand:	±15V

RS-422/485 Driver/Receiver:
Device:	75ALS180 or MAX491
Differential driver output voltage:	1.5 - 6 V

Differential input high-threshold voltage: 0.2 V maximum

Differential input low-threshold voltage: -0.2 V minimum

Automatic RS-485 Driver Control Timing:

Driver is enabled when data is a logic “0” (start bit). Driver remains enabled for one character transmission time (10 bits

of data at current baud rate). Each additional logic “0” resets the timeout.

Termination: A 120Ω termination resistor is jumper selectable on the 422/485 receiver.

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2 Chapter 1 Documentation Number 3PCIOSD1x-3903m Manual

B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104	B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445	B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445