Brief Product Description

AI625, part number 3BHT300036R1, is a 16‑channel 12‑bit analog input module for ABB S600 I/O and Advant Controller 160 DCS systems. This rack‑mounted module acquires 4‑20mA analog signals from field transmitters and converts analog field measurements into digital data for the main controller processing. It features group‑wise galvanic isolation, strong common‑mode noise rejection and built‑in channel diagnostics, ensuring stable signal acquisition in high‑EMI industrial control cabinets. Designed for backplane bus connection with Advant controller hardware, it serves as a legacy automation spare. Supplied as fully‑tested surplus and refurbished units for maintenance and retrofit of existing ABB Advant DCS installations.

Core Product Functions

• 16 analog input channels for collecting standard 4‑20 mA current signals from field process transmitters
• 12‑bit high‑resolution analog‑to‑digital conversion for accurate process value measurement
• Group galvanic isolation suppresses ground loop interference and improves EMC performance in noisy environments
• High common‑mode rejection ratio reduces external electromagnetic disturbance impact on measured data
• On‑board channel diagnostics for detecting open‑circuit and out‑of‑range input signal conditions
• Over‑voltage and surge protection to mitigate damage caused by field‑side wiring faults
• High‑speed backplane bus communication transmits converted digital data to Advant main controller
• Rack‑mount structure for installation inside S600 I/O cabinets with standard mechanical dimensions

• Continuous stable data acquisition for closed‑loop process monitoring and control loops

Application Scenarios

• ABB Advant Controller 160 DCS systems for petrochemical and chemical process plants
• Power plant control cabinets for pressure, flow and temperature transmitter signal acquisition
• Water and wastewater treatment plant analog instrument monitoring systems
• Metallurgy, pulp & paper legacy process control loops adopting S600 I/O hardware
• General process industry automation built on ABB Advant Master distributed control platform
• Spare replacement analog input module for maintenance, troubleshooting and upgrade of legacy S600 I/O racks

FAQ (Frequently Asked Questions)

• Q: Module shows zero or fluctuating measurement values after replacement?
  A: Check field transmitter power supply, wiring polarity, terminal connections, cable open‑short circuit and DCS channel configuration parameters.
• Q: System reports channel abnormal or out‑of‑range alarms during operation?
  A: Inspect field instrument failure, loop wiring damage, poor backplane contact or internal module component degradation.
• Q: Can ABB AI625 3BHT300036R1 be hot‑swapped with rack powered‑on?
  A: Hot‑swap is not supported for S600 I/O series. Power down the rack before module replacement and verify all channel readings after installation.
• Q: Can this module work with third‑party PLC or other ABB I/O series such as S800?
  A: It is exclusively designed for ABB S600 I/O and Advant Controller 160. Proprietary backplane bus prevents cross‑series or third‑party compatibility.
• Q: Is ABB AI625 3BHT300036R1 available for brand‑new DCS projects?
  A: This legacy analog input module has reached end‑of‑life. Only surplus and fully‑tested refurbished units are offered for existing‑site maintenance and retrofit tasks.