Serial 24 Line Digital I/O Unit

Product Datasheet
Product User Manual
  • Connects via RS232 or RS485
  • 24 DIO lines
  • TTL level I/O
  • I/O Connector: 1x DB25 Male
  • LED indication of power connection
  • Ideal for portable/laptop applications
  • Housing: Plastic ABS with rubber feet
  • Operating Temp: 0 to 70C
  • Power: 100mA max
  • O/S Support for Windows 98/ME/XP/2000
  • Includes EDRE SDK and WaveView for Windows
  • Dimensions: 45(H) x 80(W) x 148(L) mm
  • Supplied with EDR Enhanced Software & Universal Switch Mode 9V PSU

The MicroDAQ SRL-24A is a general purpose digital I/O product which communicates to the host PC via an RS-232 or RS-485 (dependent on model) serial connection. Based on the industry standard 82C55 PPI device. It features 24 TTL level digital I/O lines. The I/O can be programmed in banks of 8 as inputs or outputs.

Two interface versions are available for the serial MicroDAQ range, these include RS-232 models and RS-485 models. The RS-232 models are best suited for short distances (up to 30 meters).

The RS-485 models allow for long distance data transmission (up to 1200 meters). These RS-485 models are ideally suited for process control applications in a plant or industrial environment, which require long cable runs.

These digital I/O products are ideal for use in the connection between a computer and the outside world. Allowing computer programs not only to sense real-world events but control them as well. Applications include man-machine interfacing, driving high power loads, sensing switch contact closures and much more.

Ordering Information

Item Description Price Qty
SRL-24A-RS232 RS232 24 Channel DIO Unit - incl 2Mtr RS232 Cable & 9VDC Power Supply Contact For Price
SRL-24A-RS485 RS485 24 Channel DIO Unit - incl ADPT-9 & 9VDC Power Supply Contact For Price

Optional Accessories

Item Description Price Qty
ADPT-25-S Short MicroDAQ mini Screw Terminal Adaptor Contact For Price
ADPT-25-M Medium MicroDAQ mini Screw Terminal Adapter Contact For Price
ADPT-25-L Long MicroDAQ mini Screw Terminal Adapter Contact For Price
ADPT-2526 DB25 (F) & IDC26 (M) to 27way Screw Terminal Contact For Price
DB25M/F DB25(M) to DB25(F) Multi-core Screened Cable Contact For Price
PC-37F 24 Channel Opto-22 Solid State Relay Module Contact For Price
PC-38X 24 Channel I/O DRIVER MODULE Contact For Price
PC-43C 24 Channel Digital Opto-Isolator I/P Module Contact For Price