General Wiring Guidelines; Grounding - Emerson FB2100 Instruction Manual

FB2100 Flow Computer Instruction Manual
D301783X012
November 2023
2.5.

General Wiring Guidelines

The flow computer's pluggable terminal blocks use compression-type terminals that
accommodate wire between 28 and 12 AWG.
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2.6.

Grounding

The flow computer includes a ground stud on the bottom of the battery compartment.
Figure 2-7.
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When making a connection, insert the bare end of the wire (approx. 1/4" max) into
the clamp adjacent to the screw and secure the screw.
To prevent shorts, ensure that no bare wire is exposed.
Allow some slack in the wire while making terminal connections. Slack makes the
wires more manageable and helps minimize mechanical strain on the terminal
blocks.
Use twisted pair, shielded and insulated cable for communication and I/O wiring to
minimize signal errors caused by electromagnetic interference (EMI), radio
frequency interference (RFI) and transients. When using shielded cable, ground all
shields at only one point in the appropriate system. This prevents circulating ground
current loops that can cause signal errors.
Ground Stud
Once you have installed the unit, run a ground wire between the ground stud
on the bottom of the battery compartment and a known good earth ground.
You route the ground wire through one of the conduit fittings.
Use stranded copper wire to earth ground and keep the length as short as
possible.
Clamp or braze the ground wire to the ground bed conductor (typically a
stranded copper AWG 0000 cable installed vertically or horizontally).
Installation