Flowserve UEX Limitorque - Manual (Page 50)

Limitorque UEX FCD LMENIM1205-03-AQ – 05/15
50
Figure 16.2 – Typical F
oundation
Fieldbus System with a DCS Host (Daisy Chain Shown)
Distributed Control
System (Host )
Control Highway
Fieldbus
Inte rf ace
UEX
Actuator
UEX
Actuator
UEX
Actuator
UEX
Actuator
T erminator
T erminator Fieldbus Network
Fieldbus
Power
Supply
9-32 V
For fieldbus technology and cabling information, refer to the following documents:
• F
oundation
Fieldbus Wiring and Installation 31.25 kbits/s, Voltage Mode, Wire Medium AG-140
• F
oundation
Fieldbus Technical Overview, FD-043
• Relcom Inc. Fieldbus Wiring Design and Installation Guide
• ANSI/ISA-S50.02, Part 2-1992, Fieldbus Standard for Use in Industrial Control Systems Part 2:
Physical Layer Specification and Service Definition
• F
oundation
Fieldbus FF-890 and FF-891, F
oundation
Specification, Function Block Application Process,
Part 1 and 2.
Reference can be made to the following books:
• Fieldbuses for Process Control: Engineering, Operation, and Maintenance. ISBN 1-55617-760-7.
Network Wiring – F
oundation
Fieldbus
• Belden 3076F Specifications
Key Specifications – 18 AWG
• Nominal Capacitance 80 pF/m
• Nominal DC Resistance 24 ohm/km max
• Characteristic Impedance 100 ohms
• Nominal Impedance – 100.0