Campbell CR1000X, Product Manual, Page: 186 / 238

own independent 32-bit counter.
NOTE:
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()
.
Maximum Input Voltage: ±20 Vdc
Maximum Counts Per Channel: 2
32
Maximum Counts Per Scan: 2
32
Input Resistance: 5 kΩ
Accuracy: ±(0.02% of r 1/scan)
10.6.1 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
Minimum Switch Closed Time: 5 ms
Minimum Switch Open Time: 6 ms
Maximum Bounce Time: 1 ms open without being counted
10.6.2 High-frequency input
Resistance: Configurable in terminal pairs with 100 kΩ pull-up or pull-down
Pull-Up Resistance: 100 kΩ to 5 V
Event: Low (<0.8 V) to High (>2.5 V)
Maximum Input Frequency: 250 kHz
10.6.3 Low-level ac input
Minimum Pull-Down Resistance: 10 kΩ to ground
Ac-offset Rejection: Internal ac coupling eliminates ac-offset voltages up to ±0.05 Vdc
Input Hysteresis: 12 mV @ 1 Hz
Low-Level Ac Pulse Input Ranges:
10. Specifications 170