3BSE023675R1 | ABB AI845 Analog Input - Redundant Module

Overview

The ABB AI845 3BSE023675R1 is an 8-channel unipolar single-ended analog input module featuring redundancy support and HART communication capability designed for S800 I/O systems to capture precise current and voltage process signals.

Technical Specifications

• Product Type: Analog Input Module
• Part Number: 3BSE023675R1
• Model: AI845
• Mechanics: S800
• Number of Channels: 8
• Signal Type: Unipolar single ended
• Signal Specification: 0 to 20 mA, 4 to 20 mA, 0 to 5 V, 1 to 5 V
• Resolution: 12 bit
• HART Communication: Yes (Pass-through)
• Redundancy: Yes (Supports single or redundant applications)
• SOE: No
• High Integrity: No
• Intrinsic Safety: No
• Input Impedance (Voltage Input): 10 MΩ
• Input Impedance (Current Input): 250 Ω
• Under/Over Range (0..20 mA, 0..5 V): 0% / +15%
• Under/Over Range (4..20 mA, 1..5 V): -12.5% / +15%
• Maximum Error: 0.1%
• Temperature Drift: Max. 50 ppm/°C
• Input Filter (Rise Time 0-90%): 290 ms
• Update Cycle Time: 10 ms
• Current Limiting: Built-in current limited transmitter power
• Maximum Field Cable Length: 600 meters
• Maximum Input Voltage (Non-Destructive): 11 V d.c.
• NMRR (50Hz, 60Hz): > 40 dB
• Rated Insulation Voltage: 50 V
• Dielectric Test Voltage: 500 V a.c.
• Power Dissipation: 3.5 W
• Current Consumption (+5 V Modulebus): 100 mA
• Current Consumption (+24 V Modulebus): 50 mA
• Current Consumption (+24 V External): Max. 265 mA
• Front LEDs: F(ault), R(un), W(arning)
• Module Error Supervision: Analog read back, reference voltage, internal power supply, checksum, watchdog, memory error
• Internal Channel Error Supervision: Low pass filter, multiplexer, test channel error
• External Channel Error Supervision: External power supply low, transmitter power, external shunt error
• Compatible Module Termination Units (MTUs): TU810, TU812, TU814, TU844, TU845, TU854

Key Features

• Supports full single or redundant line operations to increase industrial control loop availability.
• Features standard pass-through HART routing to retrieve device parameters and status data seamlessly.
• Configures each channel for flexible voltage or current operations when matched with TU844 or TU845 MTUs.
• Includes individual current-limited and supervised transmitter power loops to safe-guard 2-wire and 3-wire sensors.
• Employs 12-bit operational resolution combined with comprehensive software-reported diagnostics to trace internal and external faults.

Installation Notes

• Mount the module onto a compatible single or redundant Module Termination Unit (MTU) inside a protected electrical cabinet.
• Connect the external transmitter loops to the proper terminal base slots verifying current or voltage layout rules.
• Ensure correct functional grounding links across the DIN structures to maintain proper 500 V a.c. isolation ratings.
• Confirm that both structural redundancy settings and channel limit allocations are mapped inside the system controller configuration prior to runtime boot.