Daytronic AA41-4F010 Handleiding

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1GENERALDESCRIPTIONANDSPECIFICATIONS

The Models AA41-2and AA41-4are two- and four-channel conditioners (respectively)

for measuring rpm, flow, and other phenomena that can be sensed by pulse trans-

former transducers with 2-wire isolated windings (tachometer pickups, turbine

flowmeters, etc.), transistor or logic-circuit drivers, “zero-velocity” (true digital output)

sensors, and similar

frequency- generating transducers.

The AA41 accepts a wide range of waveshapes and voltage levels. A “Smart Schmitt”

threshold level for each input channel may be individually selected via internal jumper

connections, depending on the expected peak voltage input: 0.1-2 V; 0.5-10 V; 2.5-50

V; or 10-200 V. This ensures reliable triggering when the input is at the low end of the

voltage range. All ranges are protected against an overload of up to 200 V. Nominal

±5 V-DC excitation is supplied for use with a “zero-velocity” sensor.

Standard AA-card “F1” programmable filter tiles let you tailor the dynamic frequency

range and signal response of each AA41 channel to your application’s requirements.*

Setting a frequency channel’s programmable filter to the 1.6-Hz cutoff provides the fol-

lowing input ranges:

•10% to 100% of full scale for a range of 250 or 500 Hz

•2% to 100% of full scale for a range of 1 or 2 kHz

•1% to 100% of full scale for a range of 4, 8, 16, or 32 kHz

If a faster response is more important than dynamic range, you may select a higher

“F1” bandwidth value (see Table 2). However, programmable filter settings above 25

Hz are not recommended for use with the AA41, because of inadequate usable

dynamic frequency range. When the card is used in System 10, its filter cutoff values

are set by means of an on-board 16-position switch for each channel.

Capacitive coupling of 0.1 or 10 microfarads is provided for low-frequency inputs, to

eliminate false triggering by signal noise and/or any positive or negative DC offset that

exists for the frequency signal.** A special trigger-level control guarantees reliable

triggering when the input is at the low end of the frequency range, while a precise

MODELAA41-2

MODELAA41-4

FREQUENCYINPUT

CONDITIONERCARD

GENERALDESCRIPTIONANDSPECIFICATIONSAA41-2/4.1

PLEASENOTE: In this manual, “AA41” will be used to refer to BOTH the two-channel

Model AA41-2AND the four-channel Model AA41-4, in cases where it is not neces-

sary to distinguish them.

*Or, if desired, a fixedfilter of either 10 or 50 Hz for all channels may be specified at the time of

order.

**Noise suppression is always recommended when using a magnetic pickupas the frequency

source.

1.E.2.AA41-2/4

SYSTEM10

ANALOGINPUTCARDS

Product specificaties