ADLINK DAQ-2500 Series Multi Channel Analog Output Card

8.3 Grounding and Isolation

Although the card does not provide inter channel isolation, its differential pseudo differential design (analog input is single ended) is sufficient for common ground systems with small ground potential differences. In noise sensitive environments, it is recommended to use shielded twisted pair cables and ensure that the signal source is well grounded with the acquisition card.

Selection Decision Matrix: Balance between 2501 and 2502

Reasons for recommending models for demand scenarios

Need to drive three-phase motor/inverter (3-channel sine+1-channel bias) 2501 (4-channel output), with 4 additional analog inputs available for current/voltage feedback

Multi channel sensor simulation is required (such as 6-degree-of-freedom platform, 8-channel piezoelectric actuator) with 2502 (8 outputs) and 8 synchronous outputs to meet the requirements of multi-channel excitation; Simultaneously use 4 inputs for monitoring

The system is based on the old PCI architecture DAQ-250x and is compatible with 5V/3.3V PCI

The system is a compact embedded controller (without PCI slot) with DAQe-250x PCIe interface, suitable for the new generation platform

Requires chassis style modular integration (such as combining with PXI digitizer and switch module) PXI-250x standard PXI size, with backplane synchronization

Replacement and upgrade considerations: For scenarios where other brands' 4/8 channel analog output cards are used, the 2500 series has significant advantages in channel count, update rate, and external reference flexibility. When migrating, it is important to focus on the connector pin definition (68 pin VHDCI) and software API differences, but the rich example code provided by Linghua can significantly shorten the development cycle.

Typical application scenarios and performance optimization suggestions

10.1 Application Examples

Automotive ECU testing: Simulate multiple signals such as oxygen sensors and crankshaft position sensors, while collecting ECU output responses.

MEMS inertial sensor testing: Generate multiple sine/random vibration excitations and synchronously collect sensor outputs.

Magnetic resonance gradient coil drive (pre discharge): high update rate, low delay waveform output.

Battery Management System (BMS) simulation: Simulate multiple cell voltages to validate BMS balancing algorithms.

10.2 Performance Optimization Techniques

Fully utilize hardware waveform generation: Pre load repetitive waveforms into FIFO to avoid frequent CPU interrupts.

Reasonable selection of triggering mode: Using delay triggering can achieve phase shift between multiple output channels, equivalent to digital phase shift.

Reduce output noise: Use an external low-noise reference source and keep the output cable as short and shielded as possible.

When synchronizing multiple cards: it is necessary to ensure that the SSI cable length is consistent and follow the master-slave clock allocation rules to avoid clock skew.

Environmental specifications and reliability

Working temperature: 0 ° C to 55 ° C.

Storage temperature: -20 ° C to 70 ° C.

Humidity: 5% to 95% (without condensation).

Power consumption: Taking DAQe-2501 as an example,+3.3V 0.78A,+12V 0.66A; The DAQ/PXI version is mainly+5V 1.6A. Sufficient margin should be reserved when designing system power supply, especially during multi card synchronization.