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Model 10A41-2C
 Dual Frequency to Voltage Input Conditioner

Input Type Description SPS6000 SPS8000 System 10
Frequency, Speed, RPM, Flow Dual Frequency Input
 X*X
 X*X
 X*X


This card is functionally identical to the Model 10A40, except that
  • It accepts two independent frequency signals (rather than one), and employs a 1-MHz crystal frequency reference (Like the 10A40, the Model 10A41-2C is not recommended for frequencies under 25 Hz.)

  • It may be used in System 10, SPS6000, and SPS8000

  • Selectable Threshold: The "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.

  • One of four separate filter bandwidths is available for each input channel: 1.25 Hz; 2.5 Hz; 5 Hz; or 12.8 Hz. Per-channel bandwidth is selectable via internal jumpers. Each channel is normally preset for the 1.25-Hz bandwidth, which, while yielding the slowest response, also provides the widest dynamic range for high-frequency inputs (2% to 100% of full scale for the 1-kHz and 2-kHz ranges; 1% to 100% of full scale for ranges above 2 kHz). For faster response, you may select one of the higher filter band-widths- see the table below.

  • The common-mode rejection ratio at both 60 Hz and 1 kHz is -60 dB

Analog Filter Characteristics, Model 10A41-2C
Step-Response Settling Time
(Full-Scale Output)...
10A41-2C
Bandwidth

Filter
Response
at -3 dB
Response
at -52 dB
to 1% of
final value
to 0.1% of
final value
No. 1
No. 2
No. 3
No. 4
 3-pole Butterworth
3-pole Butterworth
3-pole Butterworth
3-pole Butterworth
 1.25 Hz
2.5 Hz
5 Hz
12.8 Hz
 12.5 Hz
25 Hz
50 Hz
128 Hz
 770 msec
375 msec
172 msec
55 msec
 1100 msec
580 msec
275 msec
100 msec


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