3BSE008550R1 | ABB DI821 Digital Input Module

Overview

The DI821 (Article Number: 3BSE008550R1) is an 8-channel digital input module designed for the S800 I/O system. It handles 230 V a.c. and 220 V d.c. inputs with individually isolated channels. Each input is equipped with current limiting components, EMC protection, input state indication LEDs, optical isolation barriers, and analog filtering. Channels 1 and 8 provide voltage supervision for other input groups, ensuring the reliability of field input power.

Key Features & Benefits

8 Channels for 230 V a.c. / 220 V d.c. inputs
Individually isolated channels for improved safety and performance
Voltage supervision for channels 2-4 (via Channel 1) and 5-7 (via Channel 8)
Signal filtering options for better noise reduction (2, 4, 8, 16 ms)
Input status indicators for easy monitoring of each channel’s health
Error detection when voltage disappears on channels 1 or 8, with corresponding warning LED

Technical Specifications

Feature	Value
Input Voltage Range	0-50 V a.c. (0-40 V d.c.) for “0”
	164-264 V a.c. (175-275 V d.c.) for “1”
Input Impedance	21 kΩ (a.c.) / 134 kΩ (d.c.)
Filter Times	2, 4, 8, 16 ms
Analog Filter Delay	5 ms (on), 28 ms (off)
Input Frequency Range	47-63 Hz
Maximum Cable Length	200 meters (219 yards) for a.c., 600 meters (656 yards) for d.c.
Rated Insulation Voltage	250 V
Dielectric Test Voltage	2000 V a.c.
Power Dissipation	Typ. 2.8 W
Current Consumption (5 V ModuleBus)	50 mA
Current Consumption (24 V ModuleBus)	0 mA
Current Consumption (24 V External)	0 mA

Diagnostics

Front LEDs: Fault (F), Run (R), Warning (W), Channel 1-8 Status
Supervision: Channels 1 and 8 supervise the voltage for groups of channels
Error Indication: Module Error, Module Warning, Channel Error

Environmental & Certification

CE Mark: Yes
Electrical Safety: EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201
Temperature (Operating): 0 to +55 °C (+32 to +131 °F)
Temperature (Storage): -40 to +70 °C (-40 to +158 °F)
Pollution Degree: Degree 2, IEC 60664-1
Corrosion Protection: ISA-S71.04: G3
Relative Humidity: 5 to 95 %, non-condensing
Protection Class: IP20 according to IEC 60529
EMC Compliance: EN 61000-6-4, EN 61000-6-2
Overvoltage Categories: IEC/EN 60664-1, EN 50178
Equipment Class: Class I according to IEC 61140 (earth protected)
RoHS Compliance: DIRECTIVE/2011/65/EU (EN 50581:2012)
WEEE Compliance: DIRECTIVE/2012/19/EU

Compatibility

Use with MTU: TU811, TU813, TU831, TU839, TU851
Keying Code: AC

Dimensions

Width: 45 mm (1.77”)
Depth: 102 mm (4.01”), 111 mm (4.37”) including connector
Height: 119 mm (4.7”)
Weight: 0.18 kg (0.4 lbs.)

Contact Us

Phone: +86-15915488782
Email: uma@meloauto.com
WhatsApp: +8615915488782
Business Hours: 24/7 service
Address: Unit 601, Powerlong International Center, No. 1599 Luling Road, Siming District, Xiamen City, Fujian, China

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