Overview
Figure 2-8 Drive Cabinet Assembly
The Portable Maintenance Control Unit (PMCU) located inside the 7150 Drive
Cabinet allows the operator to control antenna movement from the proximity of
the antenna.
The MAIN CIRCUIT BREAKER controls the main power to the drive motors, the
limit switches, and the drive cabinet, but does not provide power to the 7200
ACU. Each inverter has an individual circuit breaker for protection. This circuit
breaker will cut off mains power to the cabinet, but mains power can also be
installed in such a way that it can be cut off external to the cabinet if necessary.
The EMERGENCY STOP switch (on the outside of the drive cabinet), when
pressed, removes power from the drive motors by opening the drive enable
contactor.
The AZ and EL inverters provide pulse-width-modulated motor current, allowing
continuously variable drive rates over a range of up to 50 to 1.
The 24 VDC power supply provides operating voltage to the drive cabinet relay
circuit board.
Relay PCB accepts all limit switch status inputs and controls the commands to the
inverter drives and the POL motors.
2-18
To Next Page
Loading...
Need help?
General