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| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model | DSAI146 |
| Order number | 3BSE007949R1 |
| Product type | Analog input unit |
| Product family | S100 I/O |
| Input sensor type | Pt100 resistance temperature detector (RTD) |
| Sensor connection | 3-wire |
| Measuring channels | 31 |
| Reference channels | 1 |
| Measurement ranges | −100 to +320°C, −40 to +40°C, or −200 to +640°C |
| Resolution | 12 or 13 bits + sign |
| Electrical isolation | Galvanic isolation between channel and system |
ABB Advant Master -S100 I_O System
Product Function in the S100 I/O System
The ABB DSAI146 is an analog input unit intended for temperature acquisition using Pt100 RTD sensors. In a process automation architecture, temperature sensors detect the thermal condition of equipment or a process medium, and the input unit provides the measurement interface through which the control system acquires those values.
The module belongs to the ABB S100 I/O family. Its role is to collect multiple temperature signals for use by the associated controller and its configured control application. This makes the exact input type important: the DSAI146 is intended for Pt100 resistance measurements rather than general-purpose voltage or current inputs or thermocouple signals.
ABB Advant Master -S100 I_O System
Core Product Summary
The ABB DSAI146 3BSE007949R1 is an analog input unit in the S100 I/O system, designed to acquire temperature measurements from three-wire Pt100 resistance temperature detectors (RTDs). It provides 31 measuring channels and one reference channel, allowing multiple temperature signals to be collected through a single input module within a compatible ABB control installation.
The DSAI146 supports documented measurement ranges of −100 to +320°C, −40 to +40°C, and −200 to +640°C, with a resolution of 12 or 13 bits plus sign. Galvanic isolation separates the input channels from the system. When selecting this module for maintenance or replacement, engineers should check the complete order number, installed S100 I/O configuration, Pt100 sensor wiring, configured measurement range, and controller hardware and software requirements.
ABB S100 I/O System
The following specifications summarize the analog, digital, pulse-counting, positioning, and motor speed control interfaces listed in the ABB technical documentation.
Analog Input Modules
| Input Signal | Channels and Technical Specifications | Model |
|---|---|---|
| ±10 V / ±20 mA | 16 differential channels; 12-bit resolution plus sign; common-mode voltage (CMV) ≤ 50 V; common-mode rejection ratio (CMRR) > 100 dB at 50 Hz | DSAI 130A |
| 0 to +10 V / 0 to +20 mA | 32 single-ended channels; 12-bit resolution | DSAI 133A1 |
| Temperature measurement | 31 measuring channels and 1 reference channel; Pt100, 3-wire; 12-bit resolution plus sign; listed ranges: −100 to +320 / −200 to +640 °C | DSAI 146 |
| Thermocouple measurement | 14 measuring channels, 2 reference channels, and 1 compensation channel; types B, C, E, J, K, R, S, and T; grounded or floating output signals; 12/13-bit resolution plus sign; CMV ≤ 16 V; CMRR > 100 dB at 50 Hz | DSAI 155A |
Analog Output Modules
| Output Signal | Channels and Technical Specifications | Model |
|---|---|---|
| ±10 V / ±20 mA | 8 channels; 12-bit resolution plus sign; galvanically isolated | DSAO 120A |
| 0 to 20 mA | 16 channels; 12-bit resolution | DSAO 130A |
Combined Analog Input/Output Module
| Input/Output Signal | Technical Specifications | Model |
|---|---|---|
| 0 to +10 V / 0 to +20 mA | 8 single-ended analog input channels and 8 analog output channels; 12-bit resolution for both inputs and outputs | DSAX 110A1 |
