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 pcl-747 image
Multiport RS-232 Controller



Ordering Information


Introduction Return to top of page

The PCL-747 intelligent 8 to 32 port RS-232 controller provides excellent serial I/O performance at moderate cost per user. You can install up to four PCL-747s in your computer for a total of 128 ports.

The PCL-747 consists of a control card housed in the host computer, a CPU module and up to four UART modules. The processors on the control card and CPU module work together to decrease the workload of the host CPU and increase system throughput. An RS-422 synchronous channel links the control card with the CPU module and UART module. Additional UART modules link in a chain to the first UART module, each providing eight ports. You can monitor the status of any port with the diagnostic LEDs located on the CPU module.

The PCL-747 comes with software drivers for DOS and Windows (PC-ComLIB). These drivers support most common languages, including C, Pascal, Visual Basic, Quick Basic, Assembly and Clipper. The PC-ComLIB package also includes DataScope with data viewing, terminal emulation and self diagnostic utilities for easy troubleshooting and debugging.

Applications Return to top of page

  • Industrial automation, data base access systems
  • Modem server, POS systems
  • Data acquisition and control system with serial I/O based devices
  • PLC monitoring and control
  • Instrument control, distribution control systems
  • High-speed, multiple-device applications

Features Return to top of page


  • Modular construction: control card, CPU module and up to four UART modules with eight ports each
  • Up to four control cards per system for a total of 128 ports
  • Throughput up to 38,400 bps with 16 ports on line, 19,200 bps with 32 ports on line
  • DOS and Windows drivers (PC-ComLIB) included
  • Easy-to-use menu driven installation program
    Control Card
  • 40 MHz TMS320C25 processor, 512 Kbyte dual port RAM (maps to just 16 KB of system addresses)
  • RS-422 synchronous interface channel lets you locate the CPU module up to 100 meters (328 ft) from the host computer
  • Six addresses available from C8000 to DC000
  • Wide range of IRQ choices: 2, 3, 4, 5, 7, 10, 11, 12 or 15
    CPU Module
  • 40 MHz TMS320C25 processor, 16 KB ROM and 32 KB RAM
  • Shares the serial I/O workload
  • Lets you monitor the status of any port with diagnostic LEDs
  • Optional power adapter expands capacity to 32 ports and Control Card to UART module distance above 2 m.
    UART Module
  • CD180 RISC-Based UART
  • Each UART drives eight high speed data channels
  • Up to four UART modules per control card
  • Complete RS-232 modem control signals
    DOS Driver
  • Optimized, small-size resident (TSR) interrupt driver
  • Supports standard DOS COM ports
  • Supports C, BASIC, Pascal, Clipper and assembly
  • Includes DataScope data viewer, terminal emulator and self diagnostic utilities for easy troubleshooting and debugging
    Windows Driver
  • DLL driver for Windows 3.0/3.1
  • Supports Visual Basic, Microsoft C , Borland C and Turbo Pascal

SpecificationsReturn to top of page


  • Number of ports: 8, 16, 24 or 32
  • Total ports in one system: 128
  • Throughput: 38400 bps max for 16 ports, 19200 bps max for 32 ports
  • Operating distance: Up to 328 ft (100 m) from the host computer
  • Operating temperature: 32 to 122 degF (0 to 50 degC)
    Control Card
  • Processor: 40 MHz TMS320C25
  • Dual-port RAM: 512 Kbytes
  • Interface: RS-422 synchronous
  • Dimensions: 8.7" x 3.9" (220 mm x 100 mm)
  • Weight: 1.32 lb. (0.6 Kg)
  • Power consumption: 5V@1A
    CPU Module
  • Processor: 40 MHz TMS320C25
  • ROM: 16 Kbytes
  • RAM: 32 Kbytes
  • Interface: RS-422 synchronous
  • Power: Power Adapter PA2 is required for 32 ports or CPU module distance greater than 6.5 feet (2 m)
  • Dimensions: 9.8" x 3.9" x 1.4" (250 mm x 100 mm x 35 mm)
  • Weight: 2.09 lb. (0.95 Kg)
    Power Adapter (PA2)
  • Input: 110-240 Vac, 50-60 Hz
  • Output: 5V@3A, 12V@2.0A, -12V@0.3A
  • Dimensions: 5.9" x 3.2" x 2.0" (150 x 80 x 50 mm)
  • Weight: 1.5 lb. (0.66 Kg)
    UART Module (Opt-8E)
  • UART: RISC-Based CD180
  • Signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD and GND
  • Dimensions: 9.8" x 3.9" x 1.4" (250 mm x 100 mm x 35 mm)
  • Weight: 1.1 lb. (0.5 Kg)
  • Power consumption: 5V@0.1A; 12V@0.15A; -12V@0.1 A

Ordering Information Return to top of page


Control Card, CPU Module, 2-meter DB-25 to DB25 cable, 8-port RS-232 UART Module and PC-ComLIB software.

Additional 8-port RS-232 UART Module

Power supply for the CPU Module

8-port RS-232 Connection Box

1-to-8 RS-232 Cable
USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1280
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027