ABB Uvisor SF910i User Manual page 49

3 Installation
3.3 Product Installation
Figure 3.5: ATB Board Appearance and Wiring Connectors
To connect the SF910i to the Burner Management System, to the communication network,
to its power supply and to a control system in general, depends on the type of SF910i
that the user is using (whether it is equipped with terminals or connectorized), on the
total number of SF910i that are needed and on the architecture of the interconnection
network that the user choose.
The power supply must be distributed to the SF910i using one circuit breaker for
each Flame Scanner. This will make possible to turn-off a single unit without affecting
the rest of the flame detection system. As an example, a thermal-magnetic circuit
breaker rated 1A nominal current and with characteristic curve "K" can be used.
For SIL2 application, the customer suggest to provide the redundancy power supply
with power voter that will have extra 24V over-voltage protection with threshold no
more than 35V
35V
In hazardous area, the cabling system must comply with the applicable safety regulations.
To make the cabling system compliant is outside of the purpose of this manual.
8VZZ005286 B
, to ensure the maximum power input to SF910i shall not exceed
DC
even when power supply enter critical failure mode.
DC
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