Analog Input Unit | DSAI145 5712001-HA | ABB

Key Highlights
Manufacturer: ABB
Model Number: DSAI145 5712001-HA
Product Type: Analog Input Unit 
Availability: In Stock
Condition: Original New
Country of Origin: Switzerland

Technical Specifications

ABB DSAI145 57120001-HA Analog Input Unit is a 31-channel RTD input module for ABB Advant OCS and S100 I/O systems. The unit accepts signals from up to 31 Pt100 3-wire resistance temperature detectors, providing accurate and stable temperature measurements for process automation applications.

Troubleshooting & Commissioning Checklist

Power & Safety: Ensure the S100 subrack and chassis power supplies are fully off.  Field Wiring: Verify that all analog signal cables from field transmitters/sensors are securely terminated. Ensure you are using shielded twisted-pair cables to minimize EMI and noise. 
Visual Inspection: Check the module edge connectors and component board for cracked solder points, dust buildup, or physical transit damage.
Address Jumpers: Match the onboard address hardware jumpers explicitly to your engineering documentation and station layout map.
Mains Frequency Jumpers: Position the noise filtering jumpers correctly according to your local power grid configuration (50 Hz or 60 Hz).
Unused Channels: Insert physical shorting jumpers across all unused channels on the terminal block to block stray electromagnetic interference

Field Engineering Considerations

Signal Conditioning: Supports platinum resistance thermometers (Pt100), as well as standard current and voltage signals. 
Pt100 Calibration: Field adjustments are most effectively performed using highly accurate resistors. For 0°C, use a 100 Ω ± 0.01% resistor. For full-scale settings, use a 300 Ω ± 0.01% resistor (representing 558°C).
Mains Frequency Rejection: Ensure onboard solder jumpers are configured properly to reject 50 Hz or 60 Hz mains interference based on your specific regional power grid. 
Module Maintenance: As a legacy S100 module, handle with standard static discharge precautions and strictly adhere to hardware configuration manuals for address jumping. 

Technical FAQ

Q: How do I handle unused input channels on the DSAI 145?
A: Jumpering requirement: You must jumper all unused inputs on the connection unit. Leaving channels floating can cause unstable readings, electrical noise, or channel-fault alarms on adjacent active loops

Q: Does the DSAI 145 feature auto-calibration or zero-adjustment?A: Automatic zero adjustment: Yes, the DSAI 145 includes an automatic zero adjustment circuit that compensates for and offsets electronic drift within 10 seconds.

Q: How do I adjust the full-scale value and ensure accuracy?
A: To calibrate the unit, connect a highly accurate 300 Ω resistor (± 0.01%) to the channel, which corresponds to exactly 558° C for a Pt100 transducer. Read the continuous value in your control software; the full-scale value is correctly adjusted when the reading is 558° C

Q: Do you supply brand-new, original parts or second-hand refurbished items?

A: Our stock consists of Original New items; all products undergo quality inspection to ensure they are fully functional.

Q: What guarantees are included with the shipment?
A: All items in stock are tested by engineers, packed in professional ESD packaging, and shipped via express logistics with a global delivery time of 24–48 hours.

Q: How long does global shipping take?
A: Stock items are typically dispatched within 24 hours. Shipments are sent via DHL or FedEx Express, taking approximately 3–5 days to reach Asia, 4–6 days to Europe and the Middle East, and usually arriving within a week in major industrial regions worldwide.

Q: If the model I need is not listed on the website, can I request a quote?
A: Yes. We hold over 200,000 SKUs of industrial spare parts in stock, and many long-tail models are not listed in full. You can send us an RFQ (Request for Quote) directly, and we will provide wholesale pricing promptly.

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