Flowserve UEX Limitorque - Manual (Page 49)

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Limitorque UEX FCD LMENIM1205-03-AQ – 05/15
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16.2 Network Wiring – Foundation Fieldbus H1
Please refer to LMENIM2330 for detailed installation instructions.
Limitorque’s F
oundation
Fieldbus field unit conforms to open Fieldbus standard IEC 61158. It is suitable
for use on the H1 highway and uses a twisted-pair cable for connection to the highway.
The UEX FF field unit fits in the actuator in the sealed electrical housing. All adjustments to the UEX FF
settings may be made over the F
oundation
Fieldbus data highway using a network configuration tool.
The UEX FF unit may command its actuator to open, stop, close, move to a set position, or perform an
emergency shutdown operation. Commands to the unit come over the network from the host system,
which may be a PC, Distributed Control System (DCS), Programmable Logic Controller (PLC), or some
other microprocessor-based device. Commands may also be generated in another network actuator or
device and transmitted over fieldbus using peer-to-peer, publisher/subscriber communication.
A fieldbus device is an intelligent device within the actuator that can send multiple variables to the
control system over a high-resolution and distortion-free digital communication network. The device
provides control and self-test capabilities, which allow abnormal conditions to be easily and immediately
identified before an unplanned shutdown.
Additional features and benefits are:
• Reduces cost of wiring and installation – existing wiring and multi-drop connections can be used.
• Interoperable devices – devices from different suppliers can communicate with one another on the
same network.
A typical UEX FF system is shown in Figure 16.2.