Fluid Components International ST100 Series Foundation Fieldbus - Manual (Page 6)

ST100 Series Foundation Fieldbus
4 Fluid Components International LLC
Topology and Network Configuration
The ST100 supports both Bus topology and Tree topology. 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 lengths.
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. The connection of couplers should be
kept less than 15 per 250m.
Figure 1
Installation
General
For details on the general mounting, placement of sensor head, and mounting options see the Basic User Manual.
Electrical Wiring
Access the wiring terminal block by removing the rear Electrical Connection Cover. This cover can be locked closed by the cover locking screw. Re-
lease the cover locking screw and remove the cover.
Cable access to wiring connections is obtained thru one of the conduit ports.
FCI recommends the use of FOUNDATION Fieldbus-H1 cable compliant with the “H1 Cable Test Specification FF-844”
The Foundation Fieldbus connections for the ST100 are
located on the interface circuit board under the solid cover.
The connector for the Foundation Fieldbus is J46, the pins
are labeled “FIELD_BUS_+” and “FIELD_BUS_-”. The ST100
FF connections are non- polarized, but polarity needs to be
observed for other manufacture’s devices. Connect the Field
bus cable as shown below in figure 1.
In addition to the FF connections in the back panel, the
ST100 also has a series of jumpers used to select the digital
communication protocol. Confirm that confirm that J3, and
J4 have the shorting jumper installed, this selects the output
for Foundation Fieldbus.