PXI2394 is a data acquisition card based on the PXI bus, produced by Beijing Alta Technology Development Co., Ltd. It has the functions of 4-axis orthogonal encoder and counter. The card has multiple input and output modes, suitable for motion control and position monitoring.
This manual describes the PXI2394 encoder and counter card, a PXI‑based data acquisition module that supports up to four independent 32‑bit quadrature encoder channels, digital I/O, and timer functions. It includes a functional overview, hardware layout, and detailed explanations of signal connections and operating modes.
The document also covers configuration options such as physical ID setting via DIP switches, interrupt sources, digital filtering, and warranty information, helping users install, program, and maintain the card in measurement and automation systems. This manual is written in Chinese.
| Number of encoder axes | 4 |
|---|---|
| Encoder resolution | 32 bit |
| Single‑ended input voltage range (high) | CH‑ = 0 V, CH+ > 2.8 V |
| Single‑ended input voltage range (low) | CH‑ = 0 V, CH+ < 0.8 V |
| Differential input voltage range (high) | CH+‑CH‑ > 0.2 V |
| Differential input voltage range (low) | CH+‑CH‑ < -0.2 V |
| Maximum single‑ended input voltage | +12 V |
| Maximum differential input voltage | ±12 V |
| Sampling clock frequencies | 1 MHz, 2 MHz, 4 MHz, 8 MHz |
| Digital filter stages | 4 |
| Optical isolation (all channels) | 2500 Vrms |
| Timer clock base sources | 50 kHz, 5 kHz, 500 Hz, 50 Hz, 5 Hz |
| Digital input voltage range | 5 V DC < V_IH < 30 V DC, V_IL < 3.4 V DC |
| Digital input over‑voltage protection | 70 V |
| Digital output supply voltage | TTL level |
The card supports four independent encoder axes.
Each encoder counter provides a 32‑bit resolution.