ABB AC 800M

I/O Systems Section 3 Configuration
96 3BSE 027 941 R301
I/O Systems
There are several methods of connecting I/O systems to the AC 800M controller:
• ModuleBus for the S800 I/O units only.
• Via CI856 for connection of S100 I/O.
• PROFIBUS DP and PROFIBUS DP-V1 for all I/O systems and units equipped
with an adapter suitable for PROFIBUS DP or PROFIBUS DP-V1
connections.
For more information on supported I/O systems and units, see Related
Documentation on page 17.
ModuleBus
The ModuleBus in the AC 800M controller consists of one electrical and one optical
unit:
• Electrical ModuleBus, (see Figure 28 on page 97) – 1 cluster (group), with a
maximum of 12 S800 I/O units connected.
• Optical ModuleBus (see Figure 28 on page 97) – 7 clusters (groups), with
maximum 7 x 12 = 84 S800 I/O units connected.
S800 I/O units can also be connected to PROFIBUS DP and DP-V1.
Note that the electrical ModuleBus can only be used for connection of
S800 I/O when AC800M is running in single CPU configuration.