Campbell CR1000X, Product Manual

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Sine wave (mV RMS) Range (Hz)
20 1.0 to 20
200 0.5 to 200
2000 0.3 to 10,000
5000 0.3 to 20,000
10.6.4 Quadrature input
Terminals: C1-C8 can be configured as digital pairs to monitor the two sensing channels of an
encoder.
Maximum Frequency: 2.5 kHz
Resolution: 31.25 µs or 32 kHz
10.7 Digital input/output specifications
Terminals configurable for digital input and output (I/O) including status high/low, pulse width
modulation, external interrupt, edge timing, switch closure pulse counting, high-frequency pulse
counting, UART, RS-232, RS-485, SDM, SDI-12, I2C, and SPI function. Terminals are configurable
in pairs for 5 V or 3.3 V logic for some functions.
Conflicts can occur when a control port pair is used for different instructions
(
TimerInput()
,
PulseCount()
,
SDI12Recorder()
,
WaitDigTrig()
). For example,
if C1 is used for SDI12Recorder() , C2 cannot be used for TimerInput() , PulseCount
()
, or
WaitDigTrig()
.
Terminals: C1-C8
Maximum Input Voltage: ±20 V
Logic Levels and Drive Current:
Terminal Pair Configuration 5 V Source 3.3 V Source
Logic low ≤ 1.5 V ≤ 0.8 V
Logic high ≥ 3.5 V ≥ 2.5 V
10.7.1 Switch closure input
Pull-Up Resistance: 100 kΩ to 5 V
Event: Low (<0.8 V) to High (>2.5 V)
Maximum Input Frequency: 150 Hz
10. Specifications 171