Description
The DSAI133A (3BSE018290R1) is a high-density analog input module belonging to the ABB S800 I/O family. It is designed to interface process signals from sensors and transmitters to the Advant Controller or other 800xA control systems. This module is specifically engineered for high precision and reliability in demanding industrial environments.
ABB DSAI133A 3BSE018290R1
Product Technical Description
The DSAI133A serves as an interface between the field and the control system bus. It converts incoming analog currents or voltages into digital values that the controller can process.
- Channel Isolation: The module provides group-wise isolation to protect the system electronics from field interference and ground loops.
- Signal Filtering: It includes built-in digital filtering to suppress mains frequency interference (50 Hz or 60 Hz).
- Self-Diagnostics: The module continuously performs self-checks. If a fault is detected, the “Fault” LED on the front panel illuminates, and an error message is sent to the CPU.
- Hot-Swap Capability: Like most S800 components, it can be replaced under power (given the appropriate station configuration), ensuring high system availability.
Product Datasheet (Parameters)
| Parameter | Specification |
| Product ID | 3BSE018290R1 |
| Module Type | DSAI 133A |
| Number of Channels | 8 Differential Inputs |
| Input Signal Range | 0…20 mA, 4…20 mA, 0…10 V, 0…5 V |
| Resolution | 12 bits plus sign |
| Input Impedance | 250 \Omega (Current) / >1 M\Omega (Voltage) |
| Isolation | Group-wise isolation from the ModuleBus |
| Power Consumption | Typ. 100 mA from 24V DC |
| A/D Converter Type | Successive Approximation |
| Update Time | Approx. 10 ms for all 8 channels |
| Country of Origin | Sweden |
Technical Characteristics
- Accuracy: Typically 0.1\% of the full-scale value at room temperature.
- Power Supply: Requires a 24V DC external power source for the field-side electronics, typically distributed via the terminal base.
- Mounting: Plugs into a standard S800 terminal base (e.g., TU810 or TU830), which provides the connection to the ModuleBus and field wiring.
Common Questions & Answers (Q&A)
Q: Can I mix voltage and current signals on the same module?
A: Yes, the channels can be configured for either voltage or current. However, usually, configuration is done in pairs or groups depending on the terminal base and software settings. Always check the specific wiring diagram for the terminal base used.
Q: Does the DSAI133A support HART communication?
A: No, the DSAI133A is a standard analog module. For HART transparent communication, you would typically use a module like the DSAI130 or DSAI133 with specific HART capabilities.
Q: What is the purpose of the “A” suffix in DSAI133A?
A: The “A” suffix often denotes a specific revision or an enhanced version with improved immunity to electrical noise or updated internal components compared to the original DSAI133.
Q: How do I handle unused channels?
A: It is best practice to short-circuit unused voltage inputs or configure them as “Not Used” in the control system software to prevent floating signals from triggering false diagnostic alarms.
Similar Model Recommendations (8 Units)
- DSAI130: 16-channel analog input module (Single-ended).
- DSAI133: Standard version of the 8-channel differential analog input module.
- DSAI130A: High-density 16-channel version with enhanced noise filtering.
- DSAO120A: 8-channel analog output module (0-20mA, 4-20mA).
- DSDI110A: 16-channel digital input module (24V DC).
- DSDO115A: 16-channel digital output module (24V DC, 0.5A).
- DSAI146: 4-channel analog input module for RTD and Thermocouple signals.
- DSAI155A: High-accuracy analog input module for specialized instrumentation.
