1. Core Technical Parameters

Backplane Supply：24 VDC

Signal Input Type：Multi-type thermocouple input

Channel Quantity：14 isolated measurement channels

Temperature Measuring Range：-200℃ ~ +1800℃

Channel Isolation Rating：2000 VAC

Operating Ambient Temp：-10℃ ~ +55℃

Applicable Platform：ABB Advant OCS / 800xA DCS rack

2. Compatibility & Expandability

Same-brand Compatibility

ABB DSAI155A is dedicated thermocouple analog input module for ABB Advant OCS distributed control system. Process instrumentation technicians install multiple ABB DSAI155A on cabinet backplanes to expand multi-point temperature acquisition capacity for metallurgy and chemical production lines. ABB DSAI155A inserts standard single rack slots and converts thermocouple weak signals into digital data to exchange with ABB master control boards without extra signal conditioning terminal blocks. Built-in cold junction compensation circuit maintains stable temperature sampling of ABB DSAI155A when matching all original ABB temperature field sensors.

Cross-brand Compatibility

Exclusive Advant OCS internal backplane bus architecture blocks direct hardware docking of ABB DSAI155A with third-party PLC racks. External signal transfer terminal adapters become mandatory to build signal links connecting ABB DSAI155A to Siemens or Schneider control hosts. Universal thermocouple signal transmission specifications allow ABB DSAI155A to capture temperature readings from most aftermarket thermal probes with no internal circuit reconstruction.

3. Lifecycle Cost Analysis

Service cycle of ABB DSAI155A is fixed at 10 years, exchange rate:1USD=7.2CNY, purchase and installation fees are excluded from all cost statistics

Annual routine maintenance cost: Channel temperature calibration and internal dust clearance for ABB DSAI155A costs 34 USD per year, total 10-year maintenance expense: 340 USD

Spare part replacement cost: Signal amplification chip aging failure of ABB DSAI155A generally occurs once every 7 years, single spare module price: 445 USD, total replacement expense within 10 years: 445 USD

Retrofit expense saving: Existing field thermocouple wiring harness fully fits ABB DSAI155A during DCS cabinet renovation projects, saving 278 USD extra wiring labor cost compared with incompatible substitute temperature input modules

Total cumulative running cost for single ABB DSAI155A across ten service years: 487 USD