CAI04 ABB MODULE

Brand: ABB

Product Series: Symphony Plus / SD Series I/O

Model: cAI04 (Part Number / Ordering Code: 2VAA008414R1)

Product Type: Compact Analog Input Module (Thermocouple & Millivolt)

CAI04 ABB MODULE

Technical Parameters:

System Architecture: Compact fieldbus I/O module designed for integration within ABB Symphony Plus control platforms (SD Series I/O) over the HN800 I/O bus.

Input Channels: 8 group-isolated, independently configurable analog input channels.

Supported Signal Types: Direct thermocouple (TC) and millivolt (mV) field inputs.

Thermocouple Types: Types E, J, K, R, S, T, B, L, N (14 or 28 AWG), U, as well as Chinese Types E and S.

Millivolt Voltage Ranges: 0 to +100 mV and -100 to +100 mV.

Analog-to-Digital Conversion: 16-bit A/D resolution per channel (including polarity) utilizing 2 dual A/D converters (4 channels per converter).

Scan Cycle & Update Rate: Updates all 8 input channels in 300 ms (approx. 10 samples per second per channel).

Measurement Accuracy: High precision of ±0.05% of Full Scale Range (FSR = 200 mV).

Cold Junction Compensation (CJC): Configurable via an embedded RTD in the mounting base (cHBS01-CJC), an external RTD connected to the base terminal block, or a user-assigned application input.

Automatic Calibration: Built-in self-calibration logic eliminating the need for manual zero and span adjustments.

Module Configuration: Configured via Function Code 221 (I/O Device Definition) for module parameters and Function Code 222 (Analog Input CH) for channel-level settings (engineering units, high/low alarm limits).

Power Supply & Isolation: Powered via 24 V DC system supply with 1500 V galvanic isolation testing voltage.

Physical Profile & Mounting: Compact form factor (127 mm height) with 35 mm DIN rail horizontal row or vertical column mounting.

Industrial Sectors:

Thermal, Nuclear, and Hydroelectric Power Generation, Chemical and Petrochemical Processing, Oil and Gas Refining, Water and Wastewater Infrastructure, Metals and Heavy Metallurgy, and Industrial Energy Management Facilities.

Application Scenarios:

1. Turbine and Boiler Temperature Monitoring: Connects direct field thermocouples to monitor critical thermal profile parameters on gas/steam turbines, heat exchangers, and boiler tubes.

2. High-Precision Millivolt Signal Processing: Collects low-level millivolt process data from specialized field sensors, strain gauges, and analytical instruments for direct ingestion into the Symphony Plus DCS loop.

3. Distributed Temperature Data Acquisition: Installed in remote SD Series I/O enclosures across large power generation and process facilities to gather field temperature data with zero need for manual calibration.

4. Process Plant Modernization & DCS Expansion: Deployed into existing Symphony Plus / Harmony DCS architectures to add high-density temperature measurement channels without occupying excess cabinet footprint.