Advantech PCM-3335 Instrukcja Użytkownika Pobierz pdf (Strona 16)

10-16

Features

Industrial Communication

All product specifications are subject to change without notice Last updated : January 2005

Pin Assignments

TX-

TX+

RX+

RX-

GND

DATA-

DATA+

GND

RTS-

RTS+

CTS+

CTS-

PCL-846

4-port High-speed RS-422/485

Communication Card

Speciﬁcations

 Ports 4

 UART 4 x 16C550 with 16-byte FIFO

 Speed 50 bps ~ 921.6 kbps

 Parity None, even and odd

 Signal Support TxD+, TxD-, RxD+, RxD-, CTS+, CTS-, RTS+ and RTS-

 I/O Address From 200H to 3F8H

 IRQ 3, 4, 5, 6, 7, 9, 10, 11, 12 or 15

 Isolation Voltage 1000 V

 Surge Protection 2000 V

(PCL-846B only)

 Power Consumption +5 V @ 970 mA typical, 1.2 A max.

 Cables 30cm male DB37 to four male DB9 (DTE)

 Operating Temperature 0 ~ 60°

C (32 ~ 140°

 Storage Temperature -25 ~ 80°

C (-13 ~ 176°

 Dimensions 185 x 100 mm (7.3" x 3.9")

RS-422

RS-485

 Four independent RS-422/485 serial ports

 Transmission speeds up to 921.6 kbps

 Independent/shared IRQ settings between each of the 4 serial ports

 Wide IRQ selection: 3, 4, 5, 6, 7, 9, 10, 11, 12 or 15

 Supports standard DOS COM1, COM2, COM3, and COM4

 Provides 1000 V

isolation

 Provides 2000 V

surge protection (PCL-846B only)

 Space reserved for termination resistors

 Supports 2 wire or 4 wire operation

 Supports Tx, Rx, RTS, and CTS signals

 Automatic RS-485 data flow control or RTS control

 Supports Windows

98/2000/XP, Linux

 Powerful and easy-to-use utility (ICOM Tools)

Ordering Information

 PCL-846A 4-port RS-422/485 interface card w/isolation

protection (30cm DB37 to 4 DB9 cable included)

 PCL-846B 4-port RS-422/485 interface card w/isolation and surge

protection (30cm DB37 to 4 DB9 cable included)

Introduction

PCL-846 provides four independent RS-422/485 serial ports on a card. Each port has a 16C550 UART with an on-chip 16-byte FIFO buffer for reliable, high-speed serial I/O. The

UART buffers data into 16-byte packets before sending it to the bus. This drastically reduces the CPU load and avoids data loss when the system is busy and cannot process the

interrupt quickly. The UART is especially useful for high speed serial I/O under Windows.

PCL-846 utilize on-board optical isolators to protect your PC and equipment against damage from ground loops, increasing system reliability in harsh environments. To further

increase reliability, PCL-846B include surge protection technology, protecting your system from abrupt high voltage surges (up to 2000 V

) such as those caused by lightning

during thunderstorms.

The RS-485 mode automatically senses the direction of incoming data and switches its transmission direction accordingly. This feature makes your network look and act just like

an RS-232 network. Application software written for half duplex RS-232 can be used without modification. Moreover, you can simply and quickly build an RS-485 network with just

two wires.

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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