Introduction
Applications
Features
Specifications
Ordering Information
Introduction
The PCL-741 provides two isolated RS-232 or current-loop serial ports.
You can configure each port individually to RS-232 or current-loop using
on-board jumpers.
The card has two 16C550 UARTs with
on-chip 16-byte FIFO buffers. The UARTs buffer data into 16-byte packets
before putting it on the bus. This drastically reduces CPU load and
avoids data loss when the system is busy and cannot process the
interrupt quickly. These FIFO buffers make the PCL-741 especially
suitable for high speed serial I/O under Windows.
On-board optical isolators protect your
PC and equipment against damage from ground loops, increasing system
reliability in harsh environments.
The PCL-741 comes with the PC-ComLIB
communication software package. 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 and terminal emulator with self-diagnostic
utilities for easy troubleshooting and debugging.
Applications
- PLC monitoring and control
- Serial communication in harsh
environments
- Data entry terminals
- Remote data acquisition and control
- Instrument controller, distributed
control systems
- Interface to modem, bar code reader,
scale, plotter feed, and serial links for PCs and instruments
Features
- Two independent RS-232 or
current-loop serial ports
- Each port is individually
configurable to RS-232 or current-loop (jumper selectable)
- 16C550 UARTs with on-chip 16-byte
FIFO
- Transmission speed up to 56 Kbps
- Provides 500 VDC isolation
protection
- Fully isolated ground and signal
lines
- Wide IRQ selection: 3, 4, 5, 7, 9,
10, 11, 12 or 15
- Complete RS-232 modem control
signals
- Supports COM1, COM2, COM3, or COM4
- PC-ComLIB software included
Specifications
- Number of ports: 2
- Protocol: RS-232 or
current-loop (20 mA)
- UART: 2 x 16C550
with 16-byte FIFO
- I/O address: From
200H to 3F8H
- IRQ: 3, 4, 5, 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 isolation:
500 VDC
- Signal isolation:
2500 Vac
- Power consumption:
+5 V@300 mA typical, 1.1 A max.
- Connectors: Dual
DB-9 male
- Operating temperature:
32 to 122 degF (0 to 50 degC)
- Dimensions: 7.3" x
3.9" (185 mm x 100 mm)
- Shipping weight:
1.3 lb. (0.6 Kg)
Ordering Information
- PCL-741
Isolated dual-port RS-232/current-loop interface card. Includes PC-ComLIB
software.
|
Home
