Universal Analog Input Slave Module | IMASI03 | ABB

Technical Specifications

The Universal Analog Input Slave Module (IMASI03) interfacesfield inputs to the multi-function processor module. TheIMASI03 supplies 16 separate process field signals into theINFI 90® Process Management System. These analog inputs areused by the Multi-Function Processor Module (MFP) to monitorand control a process.Universal analog input slave modules provide an isolated thermocouple, millivolt, RTD, and high level analog signal interfacefor the Multi-Function Processor Module with variable analog-to-digital conversion resolution up to a maximum of 24bits.

FUNCTIONAL OPERATION

The IMASI03 is an intelligent INFI 90 slave module with anon-board microcontroller and memory. It interfaces to INFI 90master modules over the slave expander bus. An on-boardmicrocontroller allows the IMASI03 to do the input channelprocessing. This allows the master module to do other tasks.Input processing tasks include error compensation, adjustments and conversion to engineering units.

Cold Junction Reference

The IMASI03 measures the cold junction RTDs on the slave'stermination device. This results in an accurate reading of theambient temperature at the field wire termination area. Thisvalue can be used by the slave to compensate for voltages generated from the bimetal connections made by terminating thefield wires (thermocouple wires) onto the terminal blocks of thetermination device.

The block address of the cold junction reference used by thermocouple inputs on the slave is contained in function code 215specification 3.Each slave configured for a thermocouple input requires a coldjunction reference. 

Each slave can only have one referencewhich can be used by up to 16 thermocouple inputs. Theexception to this is when one of the inputs is used as a remotecold junction reference.

Technical FAQ

Q: What termination unit is compatible with the IMASI03?
A: The NTAI06 Analog Input Termination Unit is primarily used to terminate field wiring and connect equipment to the module.

Q: How does it communicate within the system?
A: The module connects to the system via three card-edge connectors. It communicates with the Multi-Function Processor over the slave expander bus using the P2 connector.

Q: Can the IMASI03 be directly replaced or upgraded?
A: Yes. The IMASI13 and IMASI23 modules serve as direct replacements. Upgrading requires reviewing power supply sizing and updating specification S11 in function code 216 to match A/D conversion resolutions.

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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