Description
A80L-0024-0004-02 FANUC —System description
S900 provides all input and output modules needed for intrinsic
ally safe field signal connection. The field signals are amplified in
every S900 functional module, electrically isolated, and then
output via an internal serial bus. A communication interface con
verts the digitized signals to adapt them to the standardized
PROFIBUS DPV1 fieldbus protocol. Supervisory process control
systems, DCS or SCADA systems use an intrinsically safe field
bus to communicate with the communication interface.
A single fieldbus network suffices for configuring the individual
fieldbus nodes, for cyclic data exchange, for all acyclic services,
and for communication with HART®-compatible field instruments.
All functional modules can be replaced easily and quickly in the
installation or maintenance phase. The functional modules and
the – optionally redundant – communication interfaces of systems
placed in Zone 1 can be removed and plugged in while operation
is running, without affecting the communication of the remaining
modules. Only the primary power for the plug-in type power
supply modules requires increased safety EEx-e.
Integrated encapsulated switch-off mechanisms allow for hot
swapping, i.e. the power supply units can be replaced without
interrupting the primary power. Due to its little space requirements
and robust design and its environmentally ruggedized case, the
I/O system S900 is the best, cost-saving solution for use on site,
in hazardous Zone 1 or Zone 2 areas.
