Product Overview

• PN: DSDP140B
• Alternative Part No: 57160001-ACX
• Brand: ABB
• Series: Advant OCS / MOD30 Legacy Distributed Control System
• Type: Distributed Digital Processing Module

• FunctionIt acts as a decentralized local processing unit between main controller and field I/O racks. It undertakes preprocessing of digital input and output signals collected from on-site sensors and actuators, reduces computing load of central main control board. It is equipped with RS232 and RS485 serial interfaces, supports Modbus RTU protocol to directly connect inverters, smart meters, motor protectors and other third-party intelligent equipment without additional gateway modules. It transmits data and control instructions with system backplane MB300 bus, supports remote I/O rack deployment near field equipment, shortens wiring distance, lowers signal interference and simplifies on-site cable layout.

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Core Features

• Independent local data processing capability, offloads basic logic judgment and signal filtering tasks from upper controller
• Built-in dual serial communication channels, compatible with Modbus RTU, supports parameter reading and remote control of peripheral devices
• Complete hardware self-diagnosis function, front panel indicator lights display power supply, bus link, running status and fault alarm
• Onboard lithium backup battery to retain configuration parameters and fault log after power failure
• Electrical isolation between field wiring side and system backplane bus, effectively suppress ground loop interference
• PCB conformal coating treatment, dustproof, moistureproof and anti-electromagnetic interference, adapts to long-term continuous operation in industrial control rooms
• Standard plug-in card structure, supports hot swapping under redundant rack power supply without shutting down the entire control cabinet

• Supports redundant power signal input, matches cabinet dual power supply architecture to improve equipment operation stability

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Technical Specifications

• Working power supply: 24VDC
• Typical power consumption: 4.32W, maximum 7.2W
• Operating temperature range: -25℃ ~ +70℃
• Storage temperature: -40℃ ~ +85℃
• Humidity range: 5%~95% non-condensing
• Installation method: Plug into designated slot of Advant standard rack backplane
• Net weight: Approximately 0.44kg
• HS Code: 85389091
• Certifications: CE, UL

• Supply status: Original manufacturer discontinued production; brand new original sealed stock and fully tested refurbished spare parts are available

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Compatibility

• Applicable control system: ABB Advant OCS, MOD30, MOD300 old-generation DCS system
• Matching backplane bus: MB300 dedicated system bus
• Matching peripheral equipment: Frequency converters, intelligent instruments, protection relays, touch screens supporting Modbus RTU
• Replacement instruction: DSDP140B with suffix ACX/PU can be mutually replaced after configuration matching

• Incompatible reminder: Cannot be directly applied to System 800xA S800 I/O system without protocol modification

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Application

• Decentralized I/O expansion and third-party equipment communication access for thermal power plant boiler and turbine DCS control cabinets
• On-site signal preprocessing and data interconnection for petrochemical and chemical production line Advant control systems
• Spare part replacement and cabinet renovation maintenance for aging distributed processing modules of old ABB DCS equipment
• Data acquisition and remote monitoring interface for flue gas desulfurization, denitrification and wastewater treatment environmental protection automation systems