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16-ch Counter/Frequency Board
with 32-ch Programmable DIO
User Manual, Ver. 1.2, Apr. 2017, PMH-030-12 Page 7
1.4
Specifications
The following is an overview of the specifications for the various models in the PCI-FC16U
Model
PCI-FC16U
Counter/Frequency
Mode
Counter &
Frequency
16-ch Up Counter
16-ch Frequency
Digital Noise Filter
1 ~ 32767 μs
Isolated
Input Level
ON Voltage Level
+4.5 V
DC
~ +30 V
DC
OFF Voltage Level
+1 V
DC
Max.
Min. Pulse Width
2 μs
Input Frequency
1 Hz ~ (typically ) 250 kHz (both counter mode and frequency
mode)
where 250 kHz is calculated as followings:
Supposed that duty cycle = 50%, refer to Minimum Pulse Duration
of High Level, we have pulse period = 2 μs x 2 = 4 μs, which is 250
kHz as a max.
Max. Frequency:
Refer to Min. Pulse Duration of High Level, Max. Frequency is
highly affected by duty cycle.
Frequency Accuracy
=
± 0.4 %
EEPROM
128 KB
Isolated Voltage
2500 V
DC
ESD Protection
2 kV (Contact for each channel)
Programmable I/O
Channels
32
Digital Input
Compatibility
5 V/TTL
Input Voltage
Logic 0: 0.8 V (Max.)
Logic 1: 2.0 V (Min.)
Pull-high/low
Yes
Response Speed
1.0 MHz (Typical)