System Ground Connections; Table 2-8 System Grounding Considerations - Honeywell FSC-SM Installation Manual

2.7

System Ground Connections

Background
Grounding
considerations
36
The FSC Safety Manager cabinets, backplanes, termination panels,
communications equipment and field wiring must be properly grounded to
ensure correct and safe operation. This subsection provides the necessary
information needed to make these connections.
For basic information regarding the FSC's grounding
requirements, refer to Integration Guidelines for FSC System Cabinets.
Adequate grounding is important for safety considerations and for
reducing electromagnetic noise interference. All earth ground connections
must be permanent and provide a continuous low impedance path to earth
ground for induced noise currents and fault currents. Table 2-8 lists the
steps to be performed when grounding your system.
Table 2-8 – System grounding considerations
Step
Use the system grounding techniques described in this subsection
1
and those defined in the FSC documentation before making ground
connections. Establish:
• AC safety ground by making a
– temporary connection using the grounding terminal on front of
each power supply module, and
– permanent, redundant connection to safety ground attaching
No. 8 AWG from ground to each card file using a crimped ring
lug and 1/4" bolt.
• signal ground by tying together the signal ground and safety
ground at one and only one point.
• shield ground by connecting one end of the shield of each field
cable between an analog termination panel and analog field
device.
Select the proper voltage (115 Vac or 230 Vac) for all configurable
2
modules before supplying power to the system.
3 Securely fasten all cover plates in order to maintain system integrity
and to ensure system grounding.
FSC Safety Manager Installation Guide
Action
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