152
Effective Grounding Methods
Trident Planning and Installation Guide
Connecting to Signal Ground
The internal signal grounds (logic and field) are allowed to float with respect to the
safety ground. In most installations, it is best to tie the signal ground and safety
ground together
at one and only one point.
Notes
L
should be connected to
at one and only one place for the entire
system, including I
⁄
O bus extensions up to 200 meters (650 feet) from the MP.
Alternatively, L
can be connected to a DCS master reference ground or other
quiet earth. In simple environments, logic and field power can be combined and
treated as one ground system.
Grounding Logic
Power
Distribution
Block
MP
Baseplate
Typical I/O
Baseplate
Power
Disconnect
Power
Disconnect
Power
Supply 1
Power
Supply 2
–
–
+
+
L
J5
1
2
1
+
–
DSP1
DSP2
DSP3
DSP4
Protective Earth
Safety Ground
(
)
Extender
Summary of Contents for Trident
Page 1: ...Trident Version 1 2 Triconex An Invensys Company Planning and Installation Guide ...
Page 10: ...x Contents Trident Planning and Installation Guide ...
Page 16: ...xvi Training Trident Planning and Installation Guide ...
Page 53: ...Main Processor Module 37 Chapter 3 System Description Model 2101 Main Processor Baseplate ...
Page 140: ...124 Covers Trident Planning and Installation Guide ...
Page 216: ...200 Replacing Modules Trident Planning and Installation Guide ...
Page 238: ...222 Diagread Cables and Debug Connectors Trident Planning and Installation Guide ...
Page 240: ...224 Trident Planning and Installation Guide ...
Page 248: ...232 Trident Planning and Installation Guide ...
Page 264: ...248 Glossary Trident Planning and Installation Guide ...
Page 274: ...258 Index Trident Planning and Installation Guide ...