8 Channel Isolated AC Voltage Digital Input (16-bit Counters) Data Acquisition Module communicable over RS-485. Supports operating temperatures between -25°C ~ +75°C (-13°F ~ +1677deg;F).
D/I can be used as counter channels: 8 (16-bit: 0 ~ 6,5535)
Max.Counter Frequency :100Hz ( When AC frequency > 60Hz)