Campbell CR300 series - 24.6 Pulse measurement specifications

24.6 Pulse measurement specifications
Terminals are individually configurable for switch closure, high-frequency pulse, or low-level AC
measurements.
24.6.1 Switch-closure input
Terminals:
l
P_SW
l
C1-C2 (Requires an external 100 kΩ resistor connected from the terminal to VX1 or VX2.)
Maximum Input Frequency: 150 Hz
Minimum Switch Closed Time: 3 ms
Minimum Switch Open Time: 3 ms
Maximum Bounce Time: 1 ms open without being counted
24.6.2 High-frequency input
Terminals:
l
SE1-SE4
l
P_LL
l
P_SW
l
C1-C2
Maximum Input Frequency:
l
SE1-SE4: 35 kHz
l
P_LL: 20 kHz
l
P_SW: 35 kHz
l
C1-C2: 3 kHz
24.6.3 Low-level AC input
Terminals: P_LL
Maximum Input Voltage: ±20 VDC
DC-offset Rejection: Internal AC coupling eliminates DC-offset voltages up to ±0.05 VDC
Input Hysteresis: 12 mV at 1 Hz
24. CR300 series specifications247