1.pc104 bus data acquisition card 2.16-bit 9-channel opto-isolated timer/counter 3.isolation function 4.daq card ART2542 counter card pc104 bus counter cardpc104 daq cardpc104 daqFEATURES: Opto-isolated Counter/Timer CardCounterResolution: 16-bit Channels No. : 9-channel opto-isolated timer/counterIsolation Voltage: 2500Vrms ART2542 pc104 bus counter card