Product Details
Product Description
Product Description
Focus on DCS, PLC, robot control system and large servo system.
Main products: various modules / cards, controllers, touch screens, servo drivers.
Advantages: supply of imported original products, professional production parts,
Fast delivery, accurate delivery time,
The main brands include ABB Bailey, Ge / fuanc, Foxboro, Invensys Triconex, Bently, A-B Rockwell, Emerson, ovation, Motorola, xyvom, Honeywell, Rexroth, KUKA, Ni, Deif, Yokogawa, Woodward, Ryan, Schneider, Yaskawa, Moog, prosoft and other brands
For best results, the cutoff frequency of a particular filter should remain within this range. If the cutoff frequency goes above this range, the prefilters and postfilters interfere with signals in the passband, causing additional attenuation near the cutoff frequency. If the cutoff frequency goes below this range, the level of protection from aliasing within the filter and from imaging in the output decreases. DC-Correction Circuitry and Overload Recovery The SCXI-1141/1142/1143 module incorporates circuitry that corrects for the DC gain and offset errors of the filters, leaving only the errors of the amplifiers. However, this correction circuitry takes approximately 15 s to completely respond to changes in these errors due to overload conditions (caused by driving the output signal outside of the ±5 V range) and upon power-up (no data should be taken during the first 15 s). Overload conditions result whenever the input signal exceeds ±5 V/gain. You must use a gain setting that prevents the maximum input signal from exceeding this limit, or the DC-correction circuitry will take 15 s to recover from overloads. Table 4-1. Cutoff Frequency Ranges for the SCXI-1141/1142/1143 Module Prefilters and Postfilters Range Cutoff Frequencies A 10–25 kHz B 4.3–10 kHz C 1.9–4.4 kHz D 1.5–3.4 kHz E 700 Hz–1.8 kHz F 300–700 Hz G 130–300 Hz H 100–225 Hz I 49–110 Hz J 21–49 Hz K 15–21 Hz L 10–15 Hz Chapter 4 Theory of Operation SCXI-1141/1142/1143 User Manual 4-16 Filter Bypass Mode You can bypass the filter of any channel through software control, thus making the unfiltered signal available at the output. The input amplifiers are not bypassed. You can use the filter bypass to examine the effect that the filter has on the input signal. Using this mode, you can examine an input signal without the added effects of passband ripple and phase nonlinearities. At power-up and at reset, all the channels of the SCXI-1141/1142/1143 module default to the filter bypass mode. Rear Connector Analog Outputs The connector signals A OUT and A GND are the outputs of channels 1 through 7. You can configure the OUTPUT and OUTPUT REF signals as any channel (0 through 7) of the SCXI-1141/1142/1143 module or as the output of a channel passed along the SCXIbus from any other module in the chassis. Thus, the SCXI-1141/1142/1143 modules can present its outputs in both parallel and multiplexed modes. Multiplexed Mode (Recommended) In multiplexed mode, the output signals for channels 1 through 7 are sent to the rear signal connector but are usually ignored. All samples from the module are from the OUTPUT signal of the rear signal connector, which you can configure as the output of any channel of the SCXI-1141/1142/1143 module or as the output of any other module in multiplexed mode that is sending its output onto the SCXIbus. You can also configure the SCXI-1141/1142/1143 module to send any one of its outputs to the SCXIbus. Thus, in multiplexed mode only, one module in a chassis needs to be connected to a DAQ device. You can pass signals from the other modules to the DAQ device through the SCXIbus.