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2-port Isolated RS-232/current-Loop Interface Card

PCL-741 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.

PCL-741 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 power, 2500 VDC signal 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

PCL-741 Ordering Information

  • PCL-741 : Isolated dual-port RS-232/current-loop interface card. Includes PC-ComLIB software and user's manuals

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