Boards Home > ISA Bus Data Acquisition Boards-DIO-64
32 digital input & 32 digital output with timer/counter board
» Features
■ 32-channel digital input
■ 32-channel digital output
■ Buffered output for higher driving capability
■ 3 independent programmable 16-bit down counters
■ Four clock sources : 2M, 1M, 500K, 250KHz
■ Three frequency divider :100,10,1
■ One 16-bit counter, one 32-bit timer with a 4 MHz for
interface function
■ Interrupt source : timer, event, direct trigger
■ Breadboard area for add-on circuit
» Functional Description
The DIO-64 provides 32-channel digital input, 32-channel digital output and 6-channel counter/timer.
The DIO-64 consists of two 16-bit input ports and two 16-bit output ports.
The user can use the DB-16P to connect the input ports (CN2, CN4) for isolation purpose, or use DB-16R to interface to the output ports (CN1, CN3) for relay control.
The first 8254 chip is used as general-purpose timer/ counter, such as frequency measurement, event counting and pulse generation.
The second 8254 chip is used to generate interrupt trigger signal.
The Counter 3 accept event signal and it will generate trigger signal for interrupt.
The counter 4 and counter 5 are cascaded together. The clock source is 4MHz.
It is used to generate pacer timer trigger for interrupt.
» Applications
● Factory automation
● Product Test
● Relay control
» Specifications Logic inputs and outputs
● All outputs and inputs are TTL Compatible
● Input logic high voltage : 2.0V min / 5.0V max
● Input logic low voltage : -0.5V min / 0.8V max
● Input load current : -0.45 mA min / +70μA
● Output sink current : +64 mA max
● Output source current : -15 mA General Specifications
● I/O Connector : five 20-pin ribbon male
● Power requirements : +5V @ 500 mA typical
● Operating temperature : 0°C ~ 60°C
● Operating humidity : 0 ~ 90% non-condensing
● Storage temperature : -20°C ~ 80°C
● Dimensions : 93 mm x 135 mm
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PIN View
