ABB SPASI23 16-Channel Analog Input Module | Symphony Plus/Harmony

Product Description

Overview

The ABB SPASI23 is a high-density Analog Slave Input Module designed for Symphony Plus and Harmony (INFI 90) distributed control systems. It provides precise, reliable acquisition of analog signals from field devices and transfers them to the Master Controller for processing and control.

Technical Specifications

Functional Highlights

• High Channel Density: 16 analog inputs in a single module slot reduces rack space while supporting high-point-count installations.

• Flexible Signal Handling: Accepts both 4-20 mA and 1-5 VDC signals, configurable via software or onboard jumpers.

• Advanced Signal Conditioning: Filters high-frequency noise to deliver clean, accurate readings to the Master Controller.

• Rapid A/D Conversion: Scans all 16 channels fast enough for most process loops such as temperature, level, or flow monitoring.

• Self-Diagnostics: Continuous internal checks with front-panel LED indicators signal operational status or hardware faults.

• Independent Channel Scaling: Each input can be configured in engineering units (e.g., PSI, °C, Liters) using ABB’s engineering tools.

Applications

• Large-scale analog process monitoring

• Temperature, pressure, flow, and level measurement loops

• Expansion of Symphony Plus or Harmony analog I/O racks

• Industrial data acquisition in chemical, water treatment, power, and energy sectors

Installation Note

Ensure correct dip-switch configuration to assign unique addresses for each slave module on the I/O expander bus. Conflicting addresses may cause communication errors or “Module Missing” alarms.

FAQ

Q: Can the SPASI23 handle both current and voltage inputs?
A: Yes, it supports 4-20 mA current loops and 1-5 VDC voltage signals.

Q: How many channels are available per module?
A: 16 single-ended analog input channels.

Q: How is the module mounted?
A: It installs in a standard Harmony or INFI 90 Module Mounting Unit (MMU).