Data-acquisition module features USB interface
By Warren Webb, Technical Editor -- EDN, December 20, 2006
Targeting test, security, and industrial-control applications, Sealevel Systems recently announced the first in a family of USB-compatible data-acquisition and -control modules. The SeaDAC MIO-26 includes 16 single-ended or eight differential, 12-bit analog inputs; two 12-bit DAC outputs; eight optically isolated digital inputs; and eight open-collector digital outputs. You can independently software-select each ADC input-voltage range and configure the device for measuring a 0- 20-mA current loop. The ADC channels feature 5-MHz bandwidth track/hold and 100k-sample/sec throughput. The module's DAC channels are independently jumper selectable for a 0 to 5 or a 0 to 10V output range. The digital inputs are 5 to 30V dc, and the open-collector outputs are suitable for switching the 24V devices you commonly find in industrial-control applications.
The SeaDAC MIO-26's standard operating temperature range is 0 to 70°C, and an extended-temperature range of –40 to +85°C is optional. Application software can use the vendor's SeaMax library or industry-standard Modbus protocol. The module comes with diagnostic utilities and sample programs. Prices for the SeaDAC MIO-26 start at $479 (small volumes), and it is now available.
