Model 3381 Pulse Input Module Specifications
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Points: 6, channel-isolated, commoned ground
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Input Type: Differential
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Sensor Compatibility: Magnetic, active, open collector
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Maximum Operating Voltage: ±33 V DC
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Minimum Operating Voltage:
- Differential: 500 mV P-P, 2 Hz to 32,000 Hz; 1 V P-P, 0.5 Hz to 2 Hz
- Single-ended: 1 V P-P, 2 Hz to 32,000 Hz; 2 V P-P, 0.5 Hz to 2 Hz
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Speed Range: 0 to 32,000 RPM
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Input Frequency Range: 0.5 Hz to 32 kHz
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Duty Cycle: 20% to 80%, or 10 µs minimum pulse width
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Maximum Continuous Slew Rate: 4,000 Hz/sec with 60 gear teeth
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Maximum Continuous RPM Slew Rate: 4,000 RPM/sec with 60 gear teeth
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Number of Gear Teeth: 1–255
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Termination Resistor: Baseplate configurable
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Pull-up Resistor: Baseplate configurable
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Resolution: 24 bits
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Absolute Error: ±0.01% (2,000 to 32,000 Hz); ±0.1% (0.5 to 2,000 Hz)
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Measurement Algorithm: Gear multiple tracking
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Diagnostic: Precision reference test
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Minimum Scan Update Rate: 20 ms
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Functional-to-Protective-Earth Isolation: 500 V DC, minimum
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Functional-to-Functional-Earth (Logic) Isolation: 800 V DC, minimum
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