ABBDI821 3BSE008550R1 S800 I/O Digital input Modules

Description

the DI821 is a 8 channel, 230 V a.c./d.c, digital input module for theS800 I/O. This module has 8 digital inputs. The ac input voltagerange is 164 to 264 V and the input current is 11 mA at 230 V a.c. Thed.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 isolationbarrier 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.

S800 I/Oinformation

S800 I/O provides distributed I/O on PROFIBUS and Advant Fieldbus 100 (AF100). S800 I/O is also used as a communication link to some of ABB’s Drives. With the network definition PROFIBUS, it means the both versions; PROFIBUS-DP and PROFIBUS-DPV1. An I/O station can be configured over the Fieldbus. Typical parameters are signal range, filter time, etc. The status of the modules are indicated by LEDs and also accessible over the fieldbus. Analog values are scaled 0-100% of the signal range. AI/AO modules are scanned every 4th I/O scan cycle. RTD/TC every 10th cycle. Values are transferred cyclically on the fieldbus limited by the fieldbus and the fieldbus master. The Fieldbus Communication Interface is scanning the I/O modules cyclically. The cycle time, 4-108 ms, is dependent on type and number of modules.

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