ABB 3BSE023675R1 Analog Input Module

The ABB AI845 Analog Input Module is designed for single or redundant applications within the S800 I/O system. The module provides 8 configurable analog input channels, each supporting either voltage or current signals when used with compatible MTUs. It also supports HART communication, enabling advanced diagnostics and field device management.

General Information

• Type: Analog Input

• Number of Channels: 8

• Signal Type: Unipolar, single-ended

• Supported Signal Ranges:

• 0–20 mA

• 4–20 mA

• 0–5 V

• 1–5 V

• HART Support: Yes

• Redundancy Support: Yes

• Intrinsic Safety: No

• Mechanical Platform: S800 I/O

Technical Specifications

Performance

• Resolution: 12-bit

• Accuracy (Error): Max. 0.1%

• Temperature Drift: Max. 50 ppm/°C

• Update Cycle Time: 10 ms

• Input Filter (0–90% Rise Time): 290 ms

Electrical Characteristics

• Input Impedance:

• Voltage Input: 10 MΩ

• Current Input: 250 Ω

• Isolation: Groupwise isolated from ground

• Under/Over Range:

• 0 / +15% (0–20 mA, 0–5 V)

• –12.5% / +15% (4–20 mA, 1–5 V)

• Maximum Input Voltage (Non-Destructive): 11 V DC

• NMRR (50/60 Hz): > 40 dB

• Rated Insulation Voltage: 50 V

• Dielectric Test Voltage: 500 V AC

Power Requirements

• Power Dissipation: 3.5 W

• Current Consumption:

• ModuleBus +5 V: 100 mA

• ModuleBus +24 V: 50 mA

• External +24 V: Max. 265 mA
  (22 mA + transmitter current × 1.32)

• Current Limiting: Built-in, current-limited transmitter power

Cabling

• Maximum Field Cable Length: 600 m (656 yd)

Diagnostics and Monitoring

LED Indicators

• F: Fault

• R: Run

• W: Warning

Supervision Functions

• Module Errors:

• Analog read-back

• Reference voltage

• Internal power supply

• Checksum, watchdog, memory errors

• Internal Channel Errors:

• Low-pass filter

• Multiplexer

• Test channel errors

• External Channel Errors:

• External power supply low

• Transmitter power failure

• External shunt error

Status Indication

• Module Error

• Module Warning

• Channel Error

Environmental and Certification

• CE Marking: Yes

• Electrical Safety Standards:

• EN 61010-1

• UL 61010-1

• EN 61010-2-201

• UL 61010-2-201

• Hazardous Area Approvals:

• Class I, Division 2 (cULus)

• Class I, Zone 2 (cULus)

• ATEX Zone 2

• Marine Certifications: BV, DNV, LR

• Operating Temperature: 0 to +55 °C (32 to 131 °F)

• Storage Temperature: –40 to +70 °C (–40 to 158 °F)

• Relative Humidity: 5 to 95%, non-condensing

• Pollution Degree: Degree 2 (IEC 60664-1)

• Corrosion Protection: ISA-S71.04, Class G3

• Ingress Protection: IP20 (IEC 60529)

• EMC Compliance: EN 61000-6-4, EN 61000-6-2

• RoHS Compliance: Directive 2011/65/EU (EN 50581:2012)

• WEEE Compliance: Directive 2012/19/EU

Mechanical Specifications

• Width: 45 mm (1.77 in)

• Height: 119 mm (4.7 in)

• Depth:

• 102 mm (4.01 in)

• 111 mm (4.37 in), including connector

Compatibility

• Compatible MTUs:
  TU810, TU812, TU814, TU818, TU830, TU833, TU835, TU838, TU844, TU845, TU854

• Keying Code: CC