1. Core Technical Parameters

Backplane Supply：24 VDC

Communication Standard：Modbus Master RTU

Max Connected Slaves：31 field units

Transmission Rate：1200–115200 bit/s

Galvanic Isolation：2000 VAC

Operating Temperature：-20℃ ~ +70℃

Applicable Rack：ABB AC800M controller backplane

2. Compatibility & Expandability

Same-brand Compatibility

ABB CI570 is a dedicated Modbus master interface card developed for ABB AC800M DCS rack system. Site automation technicians install multiple ABB CI570 on cabinet backplanes to build multi-channel Modbus serial networks for factory process control. ABB CI570 slides into standard single rack slots and delivers bidirectional data interaction with ABB PM8xx CPU units and full S800 I/O series without external signal conversion terminal strips. Front panel rotary address switches complete bus station configuration to maintain stable cyclic data transmission between ABB CI570 and all on-site ABB transmitters and variable frequency drives.

Cross-brand Compatibility

Exclusive AC800M internal backplane bus architecture blocks direct hardware linkage of ABB CI570 to third-party main controllers. Separate protocol transition gateways become mandatory to construct data transmission links connecting ABB CI570 with Siemens or Schneider PLC equipment. Globally unified Modbus RTU serial protocol allows ABB CI570 to collect measurement feedback signals from most aftermarket field sensors with no internal circuit refitting.

3. Lifecycle Cost Analysis

Service cycle of ABB CI570 covers 10 years, exchange rate:1USD=7.2CNY, purchase and installation fees are excluded from all cost statistics

Annual routine maintenance cost: Serial port signal calibration and internal dust clearance for ABB CI570 costs 34 USD per year, total 10-year maintenance expense: 340 USD

Spare part replacement cost: Modbus communication chip breakdown of ABB CI570 generally occurs once every 7 years, single spare module price: 446 USD, total replacement expense within 10 years: 446 USD

Retrofit expense saving: Original cabinet wiring layout fully fits ABB CI570 during control system modernization projects, saving 278 USD extra construction labor cost compared with incompatible substitute Modbus master interface modules

Total cumulative running cost for single ABB CI570 across ten service years: 508 USD