ABB IMASI02 Analog Slave Input Module

The ABB IMASI02, also cataloged as the IMASI02 Analog Slave Input Module, operates as a dedicated hardware component for converting field transmitter signals into processed backplane data within ABB Bailey Infi 90 systems. The module interface conditions 15 independent channels of continuous voltage or current signals, responding directly to polling commands from central multi-function processors across the internal rack assembly.

Hardware Specifications

Process Control & 4-20 mA Loop Acquisition

Designed for high-density 4-20 mA HART loop protocol and high-level DC voltage monitoring, the IMASI02 module provides channel-to-channel isolation and input signal filtering to eliminate industrial electrical noise. Internal signal paths process analog inputs with 14-bit resolution while maintaining high input impedance (>1 MΩ for voltage inputs, 50 Ω for current loops). Integrated cold junction compensation (CJC) algorithms and high common-mode rejection (>=90 dB at 60 Hz) ensure stable analog measurement data under dynamic field power conditions without drifting.

Frequently Asked Questions

Q: How does the IMASI02 execute analog-to-digital conversions across all 15 channels?

A: The module continuously cycles through all 15 input channels using onboard multiplexing circuitry, digitizing physical analog signals into 14-bit resolution frames at a conversion rate of 10 samples per second per channel.

Q: What are the backplane power supply voltage rails required to power the IMASI02 card?

A: The module draws operational power directly from the backplane rack power distribution lines, requiring +5 VDC at 85 mA, +15 VDC at 25 mA, and -15 VDC at 20 mA.

Field Installation Guidelines

Slide the IMASI02 module directly into its assigned slot on the Infi 90 module mounting unit, taking care to align the printed circuit board edges with the top and bottom card guides. Press the module firmly inward until the rear connectors fully engage the rack backplane assembly, and tighten the captive faceplate retention screws. Connect field input cabling using twisted-shielded pairs, maintaining a minimum physical clearance of 30 cm from high-voltage AC power conductors. Terminate all cable shields at a single chassis ground busbar to maintain high common-mode noise suppression.