100 Input/Output Modules
Trident Planning and Installation Guide
Model 3381 Pulse Input Module Specifications
Feature Specification
Points 6, channel-isolated, commoned ground
Input type Differential
Sensor compatibility Magnetic, active, open collector
Maximum operating voltage ±33 V DC
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 1V P-P, 2 Hz to 32,000 Hz
2V P-P, 0.5 Hz to 2 Hz
Speed range 0 to 32,000 RPM
Input frequency range 0.5 Hz to 32 kHz
Duty cycle 20% to 80%, or 10 µs minimum pulse width
Maximum continuous slew rate 4,000 Hz/sec with 60 gear teeth
Maximum continuous RPM slew rate 4,000 RPM/sec with 60 gear teeth
Number of gear teeth 1–255
Termination resistor Baseplate configurable
Pull-up resistor Baseplate configurable
Resolution 24 bits
Absolute error ± 0.01%, 2,000 to 32,000 Hz
± 0.1%, 0.5 to 2,000 Hz
Measurement algorithm Gear multiple tracking
Diagnostic Precision reference test
Minimum scan update rate 20 ms
Functional-to-protective-earth
isolation
500 V DC, minimum
Functional-to -functional-earth
(logic) isolation
800 V DC, minimum
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