Cable End Electrical Assemblies and Precision Measurement Processor
Cable End electrical assemblies
p/n 6510020208
10/18/07
6-7
6.2.1.2. Over-temperature
protection
The over-temperature protection uses two snap-action, bimetallic disc
thermostat devices: one located in the upper left hand corner of the
Termination PCB, and the other beside the motor controller (4022-30 only).
When the temperature exceeds 66
°
C (150
°
F) for either thermostat, the
four-pole contactor K1 disconnects both the motor controller and the
primary of the 230/56 VAC transformer.
6.2.2. AC Motor
The ac motor used on the 4022-30, 31 and 40 scanners is a one-half
horsepower, nominal 230V, three-phase induction motor rated at 75 Hz
maximum frequency of operation. It comes with an attached cooling fan.
When paired with the motor controller described in Subsection 6.2.4, it is
driven with a maximum frequency of 28 Hz.
6.2.3. Encoder assembly
The encoder assemblies for the 4022-30, 4022-31 and 4022-40 scanners
consist of an incremental optical encoder with two quadrature output
channels for calculating position and velocity by the host system of PMP
and cable assemblies to connect to terminal strips at the Termination
Board or at terminals inside the cable end. The encoder for the 4022-31 and
4022-40 scanners has resolution of 600 cycles per revolution, whereas the
one for the 4022-30 has a resolution of 80 cycles per revolution.
6.2.4. Motor controller
The motor controller is a variable frequency drive type of motor controller
specifically used for speed control of three-phase induction motors. It is
only installed on 4022-30 scanners. On the 4022-31 and 4022-40 scanners,
the motor controller is supplied on the Precision Measurement Processor
(PMP).
There may be times when programming is required to be done on site due
to failure or corruption of the Electronic Programming Module (EPM).
The procedure in this section is included to assist in manually configuring
the EPM.
Summary of Contents for 4022
Page 1: ...Precision Platform 4022 Scanner System Manual 6510020208 ...
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Page 3: ...Precision Platform 4022 Scanner October 2007 ...
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