ABB S800 User Manual

Section 2 Product Description Hardware Components
3BSE015969-600 A 61
Hardware Components
The highly modularized hardware of S800 I/O includes the following components:
• I/O Modules
• Module Termination Units (MTUs).
• Fieldbus Communication Interface
• ModuleBus Items
The communication interface modules, Optical ModuleBus Modem, MTUs
and S800 I/O modules are mounted on standard DIN-mounting rails according 
to EN50022 NS 35/7,5.
An S800 I/O station can consist of a base cluster and up to 7 additional I/O clusters.
The base cluster consists of a communication interface module and up to 12 I/O
modules. I/O cluster 1 to 7 consist of an Optical ModuleBus Modem and up to 12
I/O modules. An S800 I/O station can have up to 24 I/O modules in total. I/O cluster
1 to 7 are connected to the communication interface module through an optical
expansion of the ModuleBus.
I/O Modules
There are two types of S800 I/O modules:
• S800 I/O modules designed to be used together with the Module Termination
Units. See
Figure 20 and Figure 22.
• S800L I/O modules
– designed to be directly mounted on a standard DIN-rail and containing
process connection, via detachable connectors. The S800L modules have
only mechanical lock device and cannot be removed with power on.
– as accessories to 24 V DI/DO modules, Terminal Unit TU805 enables 2-
and 3-wires connections, see
Figure 17.

ABB S800 Specifications

General

Manufacturer	ABB
Mounting	DIN Rail
Power Supply	24 V DC
Protection Class	IP20
Certifications	CE, UL, ATEX
Number of Channels	Varies depending on module type
Model	S800
Communication Protocols	Profibus DP, Modbus
Redundancy	Yes (depending on module and communication interface)