ABB LevelMaster 7100, Инструкция по применению

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8 | 2105824-001 rev. AA
4 Upgrade procedures
4.1 Remove the sensor from the tank
Removal of the sensor requires removal of power and other connections from the
LevelMaster. Devices that may be connected to the LevelMaster may include
additional LevelMasters (RS485 bus), flow computers or controllers, an electronic
barrier card for hazardous locations. For details on additional connections refer to
the LevelMaster user manual (see the Additional information section).
In this procedure the existing electronic board is removed. Make sure it is removed
carefully to avoid damage and loss of its configuration. The existing configuration is
obtained for use on the new board if retaining sensor calibration data.
Figure 2 shows the top of an installed LevelMaster. Use as a reference for this
procedure.
TANK PORT
BUSHING
CORD
CONNECTOR
TANK
ELECTRONICS
ENCLOSURE
NUT
Figure 2: Top of the Level Master
To remove the LevelMaster from the tank:
1. Remove the cover from the electronic enclosure.
2. Use the small slotted screwdriver to remove the power and communication
connector.
IMPORTANT NOTE: There may be one or two connectors used to
connect to the existing board. If using a single connector rewiring to
two connectors will be required to connect to the new board. The
communication pinout is also different on the new board.
3. Identify which wires connect to each connector pin. If not color coded, wires may
be labeled or marked for easy identification.
a. Identify or label the two wires used for power (+V, -V).
b. Identify or label the wire pairs used for communication (+T, -T, +R, -R).