ABB S800 I/O User Manual page 17

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The S800 I/O is a modular I/O system. The modular system allows for easy
configuration of the I/O type and size.
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 Fieldbus Communication Interface module (FCI) and
up to 12 I/O modules. I/O clusters 1 to 7 consist of a ModuleBus Modem and up to
12 I/O modules. I/O clusters 1 to 7 are connected to the FCI though a fiber optic
expansion of the ModuleBus. An S800 I/O Station can have up to 24 I/O modules.
This means that an I/O Station can have a maximum of 384 digital channels or a
maximum of 192 analog channels.
An S800 I/O Station base cluster can also consist of redundant FCIs to provide
greater availability of communications between the Advant Controller and the
ModuleBus.
Each I/O cluster can be divided in groups using ModuleBus extension cables
between the groups. The maximum length of the electrical ModuleBus of an I/O
cluster is 2.5 meters (8.2 ft.) including extension cables. The factory made extension
cables which plug into the cable adaptors are available in lengths of 0.3, 0.6 and
1.2 m (1, 2 and 4 ft.). The maximum length of the optical ModuleBus expansion is
dependent on the number of ModuleBus Modems. The maximum length between
any two clusters is 15m (50ft.) with plastic fiber and 200m (667ft) with HCS glass
fiber. Factory made optical duplex cables (plastic fiber) are available in lengths of
1.5, 5 and 15 m (5, 16.7 or 50 ft.).
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Compact MTU, I.S. applications, 50V
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Power supply, 120/230V a.c. to 24V d.c. @ 5.0A
Wall Cabinet, IP65, 800 x 1000 x 300 mm (31.5 x 39.4 x 11.8)
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