Part Number: AI3351; Product Name: Analog Input (AI) Module
Brand: Invensys (A global leader in industrial automation, control, and information solutions, serving oil & gas, chemical, power, and manufacturing industries);
Product Status: Original New Unit; Product Category: Industrial Control Module, Designed for High-Precision Analog Signal Acquisition in Distributed Control Systems (DCS).
Core Application: Mainly used in Invensys DCS systems, responsible for collecting and converting analog signals from field sensors (such as pressure, temperature, flow, and level sensors) into digital signals for system processing. It is widely applied in process control scenarios including oil refineries, chemical plants, power stations, and water treatment facilities, ensuring stable and accurate data transmission with Invensys DCS controllers and peripheral devices.
Core Features: High-precision signal conversion capability; Multiple configurable analog input types; Built-in isolation protection for anti-interference; Compact design for cabinet mounting; Strong compatibility with Invensys DCS protocols; Easy calibration and maintenance via dedicated software tools.
2. Electrical Specifications (Ta = 25℃, Unless Otherwise Specified)
2.1 Power Supply Parameters
Supply Voltage: DC 24V (Rated), Voltage Tolerance: ±10% (21.6V ~ 26.4V); Power Supply Type: Backplane Power Supply via DCS Cabinet Bus or External Redundant Power Supply.
Rated Power Consumption: ≤ 2W (Typical Load), Current Draw: ≤ 83mA (24V Input, Typical).
Power Protection: Built-in reverse polarity protection, overvoltage protection (Input ≥ 28V DC), and undervoltage lockout (Input ≤ 20V DC) to prevent module damage from abnormal power conditions.
2.2 Analog Input Performance
Input Channels: 8 Channels (Isolated Between Channels); Input Signal Types: Configurable via Software - 4~20mA DC (Current Input), 0~10V DC (Voltage Input), ±5V DC (Bipolar Voltage Input), Thermocouple (J/K/T/E/R/S/B Type), RTD (PT100/PT1000).
Measurement Accuracy: Current/Voltage Input: ±0.05% Full Scale (FS); Thermocouple Input: ±0.1% FS + 0.1℃; RTD Input: ±0.05% FS + 0.05℃.
Conversion Rate: Up to 100 Samples per Second (SPS) per Channel, Configurable (10~100 SPS);
Input Impedance: Voltage Input ≥ 1MΩ, Current Input ≤ 250Ω, RTD Input ≤ 10Ω.
Isolation: Channel-to-Channel Isolation, Channel-to-Power Isolation; Isolation Voltage: 1500Vrms (Continuous) per IEC 61131-2 Standard.
2.3 Communication Interfaces
Communication Protocol: Compatible with Invensys Proprietary DCS Bus and Modbus RTU Protocol; Data Transmission Rate: Up to 19200 bps (Modbus RTU), Support for Real-Time Data Synchronization with Controllers.
Communication Interface: Industrial-Grade RS-485 with ESD Protection, Half-Duplex Mode.
