ABB AI895 3BSC690086R1 Analog Input Module

AI895 Analog Input Module

Model Number: 3BSC690086R1
Function: 8-channel, intrinsically safe analog input module for 4–20 mA current loop with HART support

General Overview

The AI895 module provides 8 analog input channels capable of 4–20 mA signal acquisition. It supports both 2-wire and 4-wire transmitters, retaining HART communication compatibility. Each channel includes intrinsic safety components for direct connection to hazardous areas, eliminating the need for external barriers.

Technical Specifications

Signal and Channel Configuration

• Signal Type: 4...20 mA, unipolar, single-ended

• Number of Channels: 8

• Resolution: 12-bit

• Isolation: Groupwise isolated from ground

• Input Filter Rise Time (0–90%): 20 ms

• Input Range (under/over): 1.5 mA to 22 mA

• Input Voltage Drop: Typ. 3 V (includes PTC)

Transmitter Supply

• Output Voltage: ≥15 V at 20 mA loop

• Overload Current Limit: 23 mA

• Built-in Current Limiting: Yes

Performance and Accuracy

• Typical Accuracy: ±0.05%

• Maximum Error: ±0.1%

• Temperature Drift: Typ. 100 ppm/°C

• CMRR (50/60 Hz): >80 dB

• NMRR (50/60 Hz): >10 dB

Power & Consumption

• Power Dissipation: 4.75 W

• +5 V Modulebus Consumption: Typ. 130 mA

• +24 V External Consumption: Typ. 270 mA, Max. <370 mA

Safety & Compliance

• Intrinsic Safety: Yes

• Electrical Safety: EN 61010-1, EN 61010-2-201

• Hazardous Location Approvals:

• ATEX/IECEx Zone 2 with interface to Zone 0

• cFMus Class I, Div 2/Zone 2 with interface to Div 1/Zone 0

• Marine Certifications: ABS, BV, DNV, LR

Environmental Ratings

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

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

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

• Max Ambient Temp: 55 °C (with vertical mounting in MTU: 40 °C)

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

• Corrosion Protection: G3 (ISA-S71.04)

Mechanical Specs

• Mounting: S800 system (use with TU890, TU891, TU891Z)

• Protection Class: IP20 (IEC 60529)

• Keying Code: AE

• Width: 45 mm (1.77”)

• Depth: 102 mm (4.01”) | 111 mm (4.37”) w/ connector

• Height: 119 mm (4.7”)

• Weight: 0.2 kg (0.44 lbs.)

Standards & Compliance

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

• WEEE: Directive 2012/19/EU

• EMC: EN 61000-6-2 / EN 61000-6-4

• Overvoltage Category: EN 60664-1 / EN 50178

• Equipment Class: Class I (IEC 61140)