Introduction
7
USB-2401
1.4.4
Digital Input/Output
Thermocouple
107.9735725
143.46202
198.49927
202.17693
2-wire RTD
44.53668125
77.870435
71.369319
127.45831
3-wire RTD
42.00570563
87.738238
72.70806
123.21166
4-wire RTD
72.2785775
155.50389
72.168651
123.65813
2-wire
resistance
72.76746238
153.9091
71.566314
122.28421
I/O Specifications
Number of channels
4-CH programmable function digital input (DI)
2-CH programmable function digital output
(DO)
Compatibility
TTL (single-end) (supports 3.3V and 5 V DI but
3.3V DO)
Input voltage
Logic low: VIL = 0.8 V max; IIL = 0.2 mA max.
Logic high: VIH = 2.0 V min.; IIH = 0.2 mA max.
Output voltage
Logic low: VOL = 0.5 V max; IOL = 10 mA max.
Logic high: VOH = 2.6V min.; IIH = 10 mA max.
Supporting modes (only
one can be selected and
function at the same time,
please see Section 4.6:
Programmable Function
I/O)
X
4-CH TTL DI and 2-CH TTL
DO
X
1-CH 32-bit general-purpose
timer/counters:
Z
Clock source: internal or
external
Z
Max source frequency:
internal: 80 MHz; external:
10 MHz
X
1-CH PWM outputs:
Z
Duty cycle:1-99% (please
see Section 4.6.3: Mode 10:
PWM Output) Modulation
frequency: 20 MHz to
0.005Hz
Mode
Sampling Rate (SPS)
Summary of Contents for USB-2401
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Page 22: ...12 Introduction Figure 1 3 USB 2401 Module Side View...
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Page 26: ...16 Introduction Figure 1 8 Module Stand Top View 20 4 20 4 B 26...
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