TP303 - Operation, Maintenance and Instructions Manual
1.6
WARNING
HAZARDOUS AREAS
In hazardous zones with explosion proof requirements the covers must be tightened with at least 7 turns. In
order to avoid moisture or corrosive gases, hand tighten the covers until the O-rings are compressed. Lock the
covers closed with the locking screw.
In hazardous zones with intrinsically safe or non-incentive requirements, the circuit entity parameters and
applicable installation procedures must be observed.
Cable access to wiring connections is obtained by the two conduit outlets. Conduit threads should be sealed by
means of code-approved sealing methods. The unused outlet connection should be plugged and sealed
accordingly.
Should other certifications be necessary, refer to the certification or specific standard for installation limitations.
Bus Topology and Network Configuration
Bus and tree topology are supported. Both types have a trunk cable with two terminations. The
devices are connected to the trunk via spurs. The spurs may be integrated in the device giving zero
spur length. A spur may connect more than one device, depending on the length. Active couplers
may be used to extend spur length.
Active repeaters may be used to extend the trunk length.
The total cable length, including spurs, between any two devices in the Fieldbus should not exceed
1900m.
In following figures, the DP/PA link depends on the application needs.
Analog
Ground
+
-
+
-
Figure 1.6 - Bus Topology
To Next Page
Loading...
Need help?
General
