The Measurement Computing PC-CARD-D24/CTR3 is a PC Card (PCMCIA) digital I/O and counter/timer board engineered for portable data acquisition systems requiring synchronized digital control and timing operations. It delivers 24 digital I/O lines organized as three 8-bit ports, each independently configurable as input or output, plus three 16-bit counter/timer channels based on the 82C54 IC. The board connects via a single 37-pin D-type connector and requires no jumper or switch configuration.
Technical Specifications
Digital I/O
• 24 channels organized into three 8-bit ports (A, B, C)
• Each port independently programmable as input or output
• Supports unidirectional and bidirectional I/O operation
• 2-wire handshake capability
• User-defined power-up states
• 100 kΩ pull-up resistors on each line
• TTL-level output signals
• All signals routed to 37-pin D-type connector
Counter/Timer Channels
• Three 16-bit counter/timer channels
• Based on 82C54 counter/timer IC
• Full access to gate, clock, and output of each counter
• Optional 10 MHz crystal-controlled oscillator connection available
– Key Features
• Plug-and-play operation—no manual configuration required
• All I/O bits default to input mode at power-up and reset
• Software and connector compatible with CIO-DIO24H/CTR3 and PC-DIO24H/CTR3
• Compatible with the CIO-DIO24 series for digital I/O applications
• Single 37-pin connector consolidates all I/O and timing signals
– Typical Applications
Industrial automation, laboratory test systems, portable process monitoring, and control applications requiring synchronized digital I/O and precision counter/timer functionality.
– Compatibility & Integration
Supported by Measurement Computing Universal Library and InstaCal software. Optional C37FF-XX cable series enables interfacing to screw terminal and signal conditioning accessory boards. DAQ software and drivers must be installed prior to hardware installation.
