Manufacture	ABB
Item No	DI821
Article number	3BSE008550R1
Series	800XA Control Systems
Origin	Sweden
Dimension	102*51*127(mm)
Weight	0.2 kg
Customs Tariff Number	85389091
Type	Input Module

 ABB DI821 3BSE008550R1 Digital Input Module The DI821 is a 8 channel, 230 V a.c./d.c, digital input module for the S800 I/O. This module has 8 digital inputs. The ac input voltage range is 164 to 264 V and the input current is 11 mA at 230 V a.c. The d.c. input voltage range is 175 to 275 volt and the input current is 1.6 mA at 220 V d.c. The inputs are individually isolated. Every input channel consists of current limiting components, EMC protection components, input state indication LED, optical isolation barrier and an analog filter (6 ms). Channel 1 can be used as voltage supervision input for channels 2 - 4, and channel 8 can be used as voltage supervision input for channels 5 - 7. If the voltage connected to channel 1 or 8 disappears, the error inputs are activated and the Warning LED turns on. The error signal can be read from the ModuleBus.Detailed data: Input voltage range, “0” 0..50 V AC, 0..40 V DC. Input voltage range, “1” 164..264 V AC, 175..275 V DC. Input impedance 21 kΩ (AC) / 134 kΩ (DC) Isolation Individually isolated channels Filter time (digital, selectable) 2, 4, 8, 16 ms Input frequency range 47..63 Hz Analog filter on/off delay 5 / 28 ms Current limitation Sensor power can be current limited by MTU Maximum field cable length 200 m (219 yd) 100 pF/m for AC, 600 m (656 yd) for DC Rated insulation voltage 250 V Dielectric test voltage 2000 V AC Power dissipation Typical 2.8 W Current consumption +5 V Modulebus 50 mA Current consumption +24 V Modulebus 0 Current consumption +24 V External 0Frequently asked questions about the product are as follows: -What is ABB DI821? The DI821 module is capturing digital (binary) input signals from field devices. It converts these signals into data that the control system can process. -How many channels does the DI821 support? The DI821 module supports 8 digital input channels, each of which can receive binary signals -What types of input signals can the DI821 module handle? The DI821 module can handle dry contact inputs like relay contacts and wet contact inputs like 24V DC signals. It is usually used for devices that output discrete signals, such as dry contact switches, proximity sensors, limit switches, buttons, relay contacts.