Number of channels
6 single-ended digital inputs (dry contact or common-cathode wet contact)
Digital input voltage
Dry contact
Logic level 0: grounding
Logic level 1: open circuit
Wet contact
Logic level 0: 0 to +3 V (maximum)
Logic level 1: +10 V to +30 V
Working mode
Digital input, low-to-high latch, high-to-low latch, counter, and frequency measurement
Counter
32-bit
Counter/frequency input range
0 to 3 kHz
Other
Supports inverted DI function