ABB UFC911B106 3BHE037864R0106 Servo Controller.Variable frequency drives are used to control the speed of an AC motor by varying the frequency and voltage of the power supplied to the motor. The VFD consists of several components like a rectifier, DC bus, inverter, and control board, which work together to achieve speed control of the motor. The control board is the brain of the VFD, which receives input signals from the operator and adjusts the output frequency and voltage accordingly.
Extraction Slot
An extraction tool is used in conjunction with the extraction slot, just below
the select push-button, to remove the card from the rack. The extraction
tool is provided as part of the Key Kit (05701-A-0550) supplied with each
rack assembly.
The card is removed by first unscrewing the two card securing screws,
one at the top of the card and the other at the bottom of the card, and then
hooking the extraction tool into the extraction slot and then gently pulling
the card out of the rack.
2.6 Display Label and Cover
A clear perspex cover clips to the front panel and retains the label which
provides identification of the control card type, sensor scale, LED and
push-button functions.
Two different label colours are used:
a. Grey/Blue – Control cards fitted with Catalytic Sensor Drive
Modules.
b. Violet – Control cards fitted with 4 – 20mA Sensor Drive
Modules.
The perspex cover is removed by first
removing the control card from the rack
and then locating a small hole on the
inside of the front panel just above the
LCD display. A blunt object, such as a
screwdriver, is then pushed through the
hole to unclip the perspex cover.
A small recess in the perspex cover
allows a label to be inserted to indicate
the channel tag name or gas type.
ENGINEERING CARD
3.1 General
The Engineering Card provides facilities to allow each control card to be
interrogated and to allow normal maintenance functions such as
calibration to be carried out. It also acts as a connecting point for the
engineering interface which allows each card to be configured.
3.2 LED Indicators
Two indicators at the top of the front panel of the
Engineering Card indicate the operational status of
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