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Engineered for ABB Bailey INFI 90 Precision Measurement
This module converts analog field signals with high accuracy. It provides precise data acquisition for the ABB Bailey NASI02 unit. You will find this analog input card in INFI 90 control systems. Unlike twelve-bit modules, this version offers fourteen-bit resolution. It handles up to four independent input channels for critical process variables.
Technical Specifications & Physical Dimensions
We designed this analog input module for demanding measurement applications. The table below presents all verified technical specifications.
| Parameter | Specification |
|---|---|
| Physical Dimensions (W x H x D) | 160mm x 120mm x 50mm |
| Total Weight | 0.52 kg (520 grams) |
| Analog Input Channels | 4 differential inputs |
| Input Voltage Range | 0-10V, ±10V, 0-5V (selectable) |
| Input Current Range | 0-20mA, 4-20mA (selectable) |
| Resolution | 14 bits (16384 counts) |
| Accuracy | ±0.05% of full scale |
| Scan Time | 100 milliseconds for all channels |
Functional Architecture and Signal Processing
This module connects to high-precision transmitters and sensors. It uses four differential inputs for superior noise rejection. You can configure each channel independently for voltage or current. Moreover, the module includes programmable gain and offset correction. These components compensate for sensor inaccuracies automatically. Consequently, the board delivers high-accuracy readings for critical process control loops.
Installation and Operational Guidelines
The ABB Bailey NASI02 provides 1500V isolation between inputs and backplane. It consumes 120 mA at 24V DC during normal operation. You must set each channel’s input type using configuration jumpers. Always use shielded twisted-pair cables for all analog connections. This practice minimizes noise pickup on high-resolution channels. Furthermore, the module supports hardware filtering for noisy signals. This feature stabilizes erratic readings from vibrating transmitters.
Physical Characteristics and Environmental Limits
This analog input module has a rugged, industrial-grade plastic housing. Its moderate 0.52 kg weight allows for easy rack installation. The layout follows ABB Bailey standard INFI 90 specifications. Therefore, it fits securely into any INFI 90 I/O rack. The module includes LED indicators for channel status and fault detection. In addition, it maintains stable operation between 0°C and 60°C ambient temperature. You can store this unit safely between -25°C and 85°C.