Overview of "AA" Conditioner Cards
A new family of Daytronic Conditioner Cards was introduced early in 1998. These Advanced Analog (or "AA") cards may be used in any new or existing System 10, SPS6000 System, or SPS8000 System. While functionally similar to the corresponding "10A" model, each "AA" card offers a number of significant enhancements-
- programmable low-pass active filtering for the removal of unwanted high-frequency measurement-signal components. Precise channel-by-channel tailoring of analog filtering is especially important when it comes to the elimination of aliasing. Where permitted by system "Configurator" software, filter cutoff selection can be wholly accomplished by software (this is just one way in which the new AA cards will interact with Daytronic "Configurator" programs for additional ease of setup and use).
AA cards presently offer two field-installable stand-off circuit board (or "tile") options for selectable analog filtering from 0.2-200 Hz or 2-2000 Hz, in 16 steps each. Shown in the specification diagram below, these filter tiles are designated "F1" (0.2-200 Hz) and "F2" (2-2000 Hz). A single filter tile is dedicated to each pair of active data channels (1 and 2, 3 and 4, etc.). Additional programmable-filter ranges will be available in the future, and will be designated by "F3," "F4," etc. Complete "F1" (Table 1) and "F2" (Table 3) characteristics are given in below.1
As an alternative to the programmable selectable filter ranges, a fixed filter with a cutoff frequency of either 10 or 50 Hz may be specified at the time of order (for characteristics, see Table 2 below). An "F010" or "F050" fixed filter will apply to all active conditioner channels.1
- AA-card analog outputs may be individually set to represent the prefiltered value of the corresponding input, if desired for purposes of real-time signal monitoring (does not apply to frequency outputs). When such is the case, the output bandwidth is limited only by that of the card itself (up to a maximum of 10 kHz).
- Enhanced linearity correction has been provided, where appropriate (applicable primarily to TC, RTD, and LVDT inputs). This (along with programmable analog filtering) allows AA cards in general to handle a wider range of transducer-based signals.
- Custom linearization is available in System 10 (only) for nonlinear AA-card inputs- with up to 8 internal look-up tables, up to 58 segments each, plus easy-to-use LinPAC V software for creation/editing, loading, backup, and restoration of linearization tables.
- Calibration data for individual input channels is factory-set by NIST-traceable computer-driven calibration equipment, and is then stored in on-board nonvolatile memory.
- All AA cards are "hot-pluggable" in all systems; that is, they may be inserted and removed from the system mainframe without first having to turn off the mainframe power.
- Each AA card has a clear and accurate specification of worst-case current draw, to allow easier and safer allotment of mainframe slot power among a given card set.
- AA cards are manufactured using the latest and highest-quality surface-mount technology, resulting in the highest immunity to shock and vibration.
- All I/O connections to the rear of an AA card are via secure, clearly labelled screw terminals in card-specific rear connector assemblies (which, for strain gage conditioners, also provide easy access to shunt calibration resistors). Internal clamp bars secure transducer cables once all leads have been connected.
- Like 10A Cards, AA cards can normally yield measurements of up to 20% over the rated full-scale range (except for temperature and frequency channels, which have minimal overrange capabilities).
1 To order a separate Two-Channel "F1" or "F2" Programmable Filter Tiles (field-installable for Channels 1,2 or 3,4 of a given AA card), you should specify Model AA2PFT-1. To order a separate Two-Channel Fixed Filter Tile (also field-installable for Channels 1,2 or 3,4), you should specify Model AA2FFT-XXX, where "XXX" indicates the cutoff frequency of the fixed filter for both input channels: currently either "010" for 10 Hz or "050" for 50 Hz. For the specification of standard AA card features, see the specification diagram. (Back to Note 1)
| "F1" Filter Specs | "F2" Filter Specs | Fixed Filter Specs |
|
Specification of AA Card Features |
AA card features are designated by adding alphanumeric feature identifiers to the base model number ("AAXX"), as follows: FOR EXAMPLE: A model number of AA30-2F1 designates a two-channel AA30 card with "F1" programmable filtering (0.2-200 Hz) for both channels. AA14-4F010 designates a four-channel AA14 card with fixed 10-Hz filtering for all four channels. AA72-4F2 designates a four-channel AA72 card with "F2" programmable filtering (2-2000 Hz) for all four channels. |
| "F1" Filter Specs | "F2" Filter Specs | Fixed Filter Specs |
|
Table 1 "F1" Programmable Filter Characteristics for "AA" Cards |
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| 3-pole modified Butterworth, switch- or software-selectable to one of 16 cutoff frequencies | |||||
| Bandwidth | Step-Response Settling Time (Full-Scale Output)... | ||||
|
Selected Cutoff Frequency (Hz) |
Response at -3 dB (Hz) |
Response at -60 dB (Hz) |
to 1% of final value (msec) |
to 0.1% of final value (msec) |
to 0.02% of final value (msec) |
|
0.2 0.4 0.8 1.0 1.6 2.0 4.0 5.0 8.0 10.0 20.0 25.0 40.0 50.0 100.0 200.0 |
0.2 0.4 0.8 1.0 1.6 2.0 4.0 5.0 8.0 10.0 20.0 25.0 40.0 50.0 100.0 200.0 |
3.9 7.8 16 20 31 39 78 98 156 195 390 488 780 975 1950 3900 |
3500 1750 875 700 438 350 175 140 88 70 35 28 18 14 7.0 3.5 |
4250 2125 1063 850 531 425 213 170 106 85 43 34 21 17 8.5 4.3 |
4750 2375 1188 950 594 475 238 190 119 95 48 38 24 19 9.5 4.8 |
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| "F1" Filter Specs | "F2" Filter Specs | Fixed Filter Specs |
|
Table 2 Fixed Filter Characteristics for "AA" Cards |
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| 3-pole modified Butterworth | |||||
| Bandwidth | Step-Response Settling Time (Full-Scale Output)... | ||||
|
Filter Designation |
Response at -3 dB (Hz) |
Response at -60 dB (Hz) |
to 1% of final value (msec) |
to 0.1% of final value (msec) |
to 0.02% of final value (msec) |
|
"F010" "F050" |
10 50 |
195 975 |
70 14 |
85 17 |
95 19 |
|
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| "F1" Filter Specs | "F2" Filter Specs | Fixed Filter Specs |
|
Table 3 "F2" Programmable Filter Characteristics for "AA" Cards |
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| 3-pole modified Butterworth, switch- or software-selectable to one of 16 cutoff frequencies | |||||
| Bandwidth | Step-Response Settling Time | ||||
|
Selected Cutoff Frequency (Hz) |
Response at -3 dB (Hz) |
Response at -60 dB (Hz) |
to 1% of final value (msec) |
to 0.1% of final value (msec) |
to 0.02% of final value (msec) |
|
2 4 8 10 16 20 40 50 80 100 200 250 400 500 1000 2000 |
2 4 8 10 16 20 40 50 80 100 200 250 400 500 1000 2000 |
40 80 160 200 320 400 800 1000 1600 2000 4000 5000 8000 10000 20000 40000 |
375 190 90 75 45 38 18 15 9.0 7.5 4.0 3.0 2.0 1.5 0.75 0.4 |
430 215 110 90 55 43 22 11 9.0 4.5 3.5 2.2 2.0 1.5 0.9 0.5 |
480 240 120 100 60 50 25 20 12 10 5.0 4.0 2.5 2.0 1.0 0.55 |
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| "F1" Filter Specs | "F2" Filter Specs | Fixed Filter Specs |
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For complete Pricing and Ordering Information, write us or call Daytronic at 1-800-668-4745 |