ABB IMASI13 Symphony Harmony Analog Input Module

Description

The ABB IMASI13 is a high-density, high-resolution analog input module designed for the Symphony Enterprise Management and Control System and fully compatible with legacy INFI 90 OPEN Strategic Enterprise Management Systems. Operating as an intelligent component within the Harmony rack I/O architecture, the IMASI13 interfaces up to 16 independently configured process channels to a Harmony area controller via a parallel, synchronous I/O expander bus.

The primary purpose of the IMASI13 is to condition, isolate, and digitize raw plant signals, incorporating dedicated delta-sigma analog-to-digital converters per channel to deliver an exceptional conversion resolution of 24 bits. It acts as a direct, drop-in replacement for the IMASI03 module, requiring only slight specification updates within function code 216 to accommodate enhanced resolution options. The module eliminates manual calibration overhead by recording factory offset, gain, and nonlinearity coefficients in onboard nonvolatile memory, executing continuous automatic recalibration during normal operation to neutralize component aging and temperature drift.

Features

• 16 analog input channels, each featuring a dedicated analog-to-digital converter providing true channel-to-channel and channel-to-logic isolation.
• high-resolution 24-bit delta-sigma conversion architecture with a total conversion rate of 180 msec for all 16 channels.
• Onboard microcontroller independently executes error compensation, adjustment algorithms, and engineering units conversion, offloading key operations from the primary controller.
• Flexible per-channel programming via function code 216, allowing a diverse mix of low-level voltage, high-level voltage, current, and resistance sensors on a single module.
• Advanced built-in diagnostics that run continuously during startup, reset, and execution phases to monitor memory checksums, watchdog timers, and circuit integrity.
• Comprehensive open input detection across active low-level voltage, thermocouple, current, and RTD loops to immediately flag field wire or termination cable breaks.
• Integrated cold junction compensation utilising onboard RTD reference networks embedded directly in the associated field termination hardware.
• Live-insertion capability (hot-swapping) allows removal or installation without interrupting system logic power.

Applications

• Thermocouple temperature monitoring and thermal profiling in power generation facilities.
• RTD-based cryogenic and high-precision temperature control loops in chemical processing plants.
• High-level voltage tracking (-10 VDC to +10 VDC) for heavy machinery position and speed instrumentation.
• Standard 4 to 20 mA process loop monitoring for pressure, flow, and level transmitters.
• Millivolt-level sensor interfaces for specialized metallurgical and laboratory process units.

Technical Specifications

Connections/Interfaces

The backplane interface provides electrical connections for input power, expander bus tracking, and plant process loops via three defined edge connectors:

Installation Guidelines

• Electrostatic Safety: Always attach a grounded static wrist strap before sliding the module out of its protective shielding bag or working around the circuit card assemblies.
• Bus Segmentation: Confirm that a 12-position dipshunt is correctly nested within the backplane socket on the Module Mounting Unit (MMU) to bind communication lines between the rack controller and the module.
• Address Configuration: Define the exact binary hardware address utilizing the rightmost six positions (positions 3 through 8) of the S1 dipswitch. Verify positions 1 and 2 are firmly closed (set to zero) for correct module operations.
• Jumper Settings: Modify the onboard hardware configuration jumper blocks (J1 through J16) to align with specific channel-by-channel requirements (millivolt, thermocouple, RTD, voltage, or current) as designated in the system software configuration.
• Enclosure Installation: Carefully glide the printed circuit card along the plastic slot channels of the MMU frame. Secure the unit using the front-panel captive screws by twisting them a half-turn until the latch slots line up vertically.

Compliance and Certifications

• CE Mark: Complies with Generic Immunity Standard EN50082-2 (Industrial Environment), Generic Emission Standard EN50081-2 (Industrial Environment), and Low Voltage Directive 73/23/EEC (via EN61010-1 safety metrics).