ABB S800 - Page 132

PROFIBUS CI840 Section 3 Technical Data and Performance
132 3BSE015969-600 A
Calculation of Number of S800 I/O Modules per Station
Due to the PROFIBUS-DP specification it is not possible to connect 24 analog
I/O modules to one FCI. The reason is that the S800 I/O system includes more data
and user parameters than PROFIBUS-DP can handle. Table 26 shows maximum
number of modules that can be connected to one CI840.
Table 26. Maximum Number of Modules on CI840
Module Type Number of Modules
AI801, AI810, AI815,
AI830, AI830A, AI835,
AI835A, AI890, AI893,
AI895
14 (11)
AI820, AI825 24 (22)
AI843 11 (9)
AI845 14 (11)
AO801, AO810, AO815,
AO810V2, AO845,
AO845A, AO890, AO895
7 (5)
AO820 14 (11)
DI801, DI802, DI803,
DI810, DI811, DI820,
DI821, DI825
(1)
, DI890
24 (24)
DI818 24 (24)
DI828 24 (24)
DI830
(1)
, DI831
(1)
15 (15)
DI840 16 (16)
DI885
(1)
22 (21)
DO801, DO810, DO814 22 (21)
DO802, DO815, DO820,
DO821
24 (24)