ABB S800, Product Manual

Page: 24 / 186

Product Overview Section 2 Product Description
24 3BSE015969-600 A
It is not necessary to implement redundancy on all components, but there are some
dependencies:
• Redundant FCI requires:
–
redundant fieldbus
• Redundant I/O Module (only in base cluster) requires:
–
double electrical ModuleBus
– redundant FCI
– redundant fieldbus
Product Overview
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 both the 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.