2.5 Making the electrical connections
This section contains instructions for making the necessary
electrical connections to the flow transmitter (see
Figure
12
below). The wiring between the transmitter and the
transducers has been installed at the factory, and no further
connections are required on this portion of the wiring.
IMPORTANT
When wires are connected to terminal blocks, use wire ties
routed through the blocks, to secure them.
Attention European customers!
To meet CE Mark requirements, all cables
must be installed as described in
A . CE Mark compliance and high noise
.
IMPORTANT
The meter is grounded to the electronics. This
configuration must be considered when applying
cathodic protection to the pipe line. The power ground
applied to the instrument should be at the cathodic
protection voltage level.
2.5.1 Removing the enclosure covers
WARNING!
Always disconnect the line power from
the meter before removing either the front
display cover or the wiring access cover.
This is especially important in a hazardous
environment.
1. Disconnect any previously wired power line from the
flow transmitter.
2. Loosen the set screw on the side cover using a 2.5 mm
hex wrench.
3. Place a rod or long screwdriver across the cover in the
slots provided, and rotate the cover counterclockwise
until it comes free from the enclosure.
4. Note the text printed on the terminal board (see
) to assist in wiring the power and option
card connections.
Proceed to the appropriate section of this chapter to make
the desired wiring connections.
Temperature
Pressure
RS232
or
RS485
RS232/RS485 modbus
Panaview™
instrument interface
software
Meter calibration, data collection,
configuration, and security
Sentinel LCT8
Flow
Computer
Corrected
Volumetric
Flow
2 frequency
2 alarms
1 analog output (4-20 ma)
3 analog inputs (4-20 ma) or
2 analog inputs (4-20 ma) + 1 RTD input
Figure 12:
Sentinel LCT8
flow measurement system connections
9
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