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 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
C1 - C4
10 mA @ 3.5V 10 mA @ 1.85V
U odd
20 mA @ 3.5V 20 mA @ 1.85V
U even
10 mA @ 3.5V 10 mA @ 1.85V
11.7.1 Switch closure input
Terminals: C1-C4, U1-U12
Resistance: Configurable in terminal pairs with 100 kΩ pull-up or pull-down
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
Software Debounce Time: 3.3 ms
11.7.2 High-frequency input
Terminals: C1-C4, U1-U12
Resistance: Configurable in terminal pairs with 100 kΩ pull-up or pull-down
Typical Wave Form: 5 or 3.3 VDC square wave
Maximum Input Frequency: 1 MHz
11.7.3 Edge timing
Terminals: C1-C4, U1-U12
11. CR6 Specifications
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