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Newswift 90-180 Motorised Antenna 14
4. DRIVE CONTROL UNIT
4.1 INTRODUCTION
The Drive Control Unit (DCU4000) is the controlling element of a Newswift Motorised
System. The unit is fitted in a compact waterproof housing mounted on the antenna. This is
connected to the stepper motors, motor rotation detectors, waveguide polarisation switch,
RF elevation inclinometer and antenna position monitors with cables running out of its front
panel via waterproof EMC cable glands.
The DCU4000 has a RS485 serial communication link using standard Advent protocol to a
controlling ACU (Antenna Control Unit) which gives the DCU simple commands. These
commands are then acted upon by the DCU.
The DCU4000 controls and monitors the sequence of events in any action such as
deploying or stowing the antenna. If a fault or possible failure is detected the system flags
the problem to the controlling ACU. When the antenna is deployed, the DCU monitors the
position of the antenna and limits the positional movement to within defined pre-
programmed limits.
4.2 SPECIFICATION
This section is for illustrative purposes only and does not form the basis for any contractual
obligation.
PHYSICAL
Dimensions 380 x 150 x 80 mm (excluding connectors).
Weight 3.0 kg approx.
Power 12V DC nominal. @2A max. (10 - 14 V DC.) 36 ± 2 V DC @5A
max.
Temperature Range -20 °C to +60 °C operating
-40 °C to +80 °C storage
Environmental Sealed to IP65, when case is in correct vertical orientation.
Angular Positional Resolution Error Repeatability
Azimuth ±0.1° ±0.2° ±0.1°
Elevation ±0.1° ±0.2° ±0.1°
Polarisation ±0.1° ±0.2° ±0.1°
Angular Position limits
Azimuth ±182°
Elevation +6° to +90°. (Nominal)
Polarisation ±46°, ±91° (no WG Switch),
Control Interface RS485, standard Advent packet protocol.
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