User guide

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Module T8442
Issue 8 Apr 10 PD-T8442 59
6. Speed Monitor Specifications
The following tables apply to the interface signals existing between the T8442 Speed Monitor module
a
nd the SIFTA and SOFTA. Refer to product descriptions PD-T8846 (SIFTA) and PD-T8891 (SOFTA)
for the specifications relative to signal field connections.
6.1. Speed Input Specifications
Parameter Min. Typ. Max. Unit Note
Speed input frequency range
Active sensor
30000 Hz
Speed input frequency range
Passive sensor
30000 Hz
Speed input duty cycle 20 80 % Steady State
Speed input speed measurement
resolution
+/-1 RPM
Speed input accuracy 0.01 % Of Full Scale or 1 RPM
whichever is the greater
Speed input detection threshold
dc coupled
200 mV
pk-pk
Across entire frequency
range
Table 21 Speed Input Specification