ADLINK USB-7250 - Manual (Page 13)

Introduction 3
USB-7230/7250
1.4.3 Digital Output (DO)
USB-7230
USB-7250
Min. pulse width for change
of state (COS) detection 20.83 ns (software programmable)
Data transfer Programmed I/O
Optical Isolated Frequency/Event Counter
Number of channels
2
Logic level VIH=5~12V, VIL=0~1.5V
Event counter width 32-bit
Max. input frequency
(DC coupled) 1 MHz
Min. input frequency
(DC coupled) 0.1 Hz
Max. frequency error 0.5% (f≤50kHz)
1% (50kHz<f≤500kHz)
2% (500kHz<f≤1MHz)
Data transfer Programmed I/O
Channels 16 (optical isolation)
Output type Open drain MOSFET
Supply voltage 5-35VDC
Max. sink current 250 mA @ 100% duty (/channel)
Data transfer Programmed I/O
Channels 8 (solid state relay, non-latching)
Contact rating
(/channel) Max. switching power 60 W, 125 VA
Max. switching voltage 220 VDC, 250VAC
Max. switching current 2 A
Relay ON/OFF time Operate time 2 ms
Release time 1 ms
Contact resistance 75mΩ (max.)
Expected lifetime
50 VDC 0.1A (resistive), 1x10
6
operations
USB-7230 USB-7250