Introduction
Applications
Features
Specifications
Ordering Information
Introduction 
The PCL-740 offers a versatile range of high speed interfacing options. You can switch its single port between popular RS-232, long distance RS-422, multidrop RS-485, or noise-resistant current-loop. The card's 16C550 UART has an on-chip 16-byte FIFO buffer for faster and more reliable communication, especially under Windows.
The PCL-740 comes with a communication software package called PC-ComLIB. The package consists of a configurable DOS driver, a programming library that supports most common languages (such as C, Pascal, Visual Basic, assembly and Clipper) and DataScope. DataScope is a data viewer/ terminal emulator with self-diagnostics utilities for easy troubleshooting and debugging.
The RS-485 mode automatically senses the direction of incoming data and switches its transmission direction accordingly. This feature means your network looks and acts just like an RS-232 network. Moreover, you can simply and quickly build an RS-485 network over two wires. Application software written for half duplex RS-232 can be used without modification.
Applications
- Instrument controller, distributed control systems
- Interface to modem, bar code reader, scale, plotter feed and serial links for PCs and instruments
- PLC monitoring and control
- Data entry terminals
- Remote data acquisition and control
Features
- RS-232, RS-422, RS-485 or current-loop interface
- 16C550 UART with 16-byte FIFO
- Transmission speeds up to 115 Kbps
- Flexible I/O address and IRQ selection
- IRQ: 3, 4, 5, 6, 7, 9, 10, 11, 12 or 15
- Complete RS-232 modem control signals
- Supports 2 wire or 4 wire operation for RS-422/485
- Automatic RS-485 data flow control
- Space reserved for termination resistors
- Supports COM1, COM2, COM3, or COM4
- PC-ComLIB software included
Specifications
- Number of Ports: 1
- Protocol: RS-232, RS-422/RS-485 or current-loop
- UART: 16C550 with 16-byte FIFO
- I/O address: From 200H to 3F8H
- IRQ: 3, 4, 5, 6, 7, 9, 10, 11, 12 or 15
- Data bits: 5, 6, 7, 8
- Stop bits: 1, 1.5, 2
- Parity: Even, odd or none
- Power consumption:
5V@180 mA max. ,
12V@20 mA max.
- Connectors: DB-9 male and DB-25 male connectors
- Operating temperature: 32 to 122 degF (0 to 50 degC)
- Dimensions: 7.25" x 4.13" (185 mm x 100 mm)
- Shipping weight: 0.44 lb. (0.2 Kg)
Ordering Information
- PCL-740
RS-232/RS-422/RS-485/Current-loop Serial Interface Card. Includes PC-ComLIB software. |
