PC/104 4-port RS-232/422/485 with 1kV isolation + 24 DIO

  • Description
  • Specifications
  • Ordering Guide

EMM-OPT4 provides an integrated, rugged, and reliable solution for PC/104-expandable embedded systems requiring serial communications in demanding applications. It offers 4 optically isolated RS-232/422/485 serial ports as well as 24 digital I/O lines, all on a single board.

Optical isolation of 1kV DC or AC protects your embedded system from ground differentials or noise spikes that would damage non-isolated boards. Each port is isolated from the other ports as well as the system. Extended temperature capability (-40 to +85ºC) enables the board to operate in vehicles such as trains and buses without concern for temperature swings.

The 24 digital I/O lines are based on an 82C55 chip and feature programmable direction in 4- and 8-bit groups. All I/O lines contain user-configurable 10K Ohm pull-up resistors for convenience.

Number of serial ports 4-ports
Protocol RS-232, RS-422, RS-485 (jumper selected)
Optical Isolation 1kV AC or DC, port to port or port to system
Control Signals RS-232: TxD, RxD, RTS, CTS
RS-422/485: TxD±. RxD±
Maximum baud rate Up to 460.8Kbps
I/O Addresses Jumper selectable I/O addresses
Interrupts Jumper selectable IRQ
Number of DIO 24 programmable
DIO Input Voltage Low -0.5V min, 0.8V max.
High 2.0V min, 5.5V max.
DIO Output Voltage Low 0.0V min, 0.4V max.
High 3.0V min, Vcc – 0.4V max.
Output Current ±2.5mA max, each line
Bus PC/104
Dimensions 90 x 96 mm
Power supply +5VDC ±5% @ 80mA max.
Operating Temperature -40 to +85°C
Model Description
EMM-OPT4-XT PC/104 4-port RS-232/422/485 with 1kV isolation + 24 DIO