User's Manual
Table Of Contents
- KH1264 ISSUE 1
- CHAPTER 1
- CHAPTER 2
- CHAPTER 3
- CONTENTS
- ILLUSTRATIONS
- Figure 1 - Transceiver (DTX-A3): Module Locations 34
- Figure 2 - Drive Control Unit (GTX-A24): Module Locations 35
- Figure 3 X-band Upmast Transceiver (DTX-A3): Functional Diagram Figure 3 38
- Figure 4 X-band Upmast Transceiver (DTX-A3): Interconnection Diagram Figure 4 39
- Figure 5 - Drive Control Unit (GTX-A24): Block Diagram 319
- CHAPTER 4
- CONTENTS
- TABLES
- ILLUSTRATIONS
- Figure 1 - Transceiver (DTX-A3): Installation Dimensions 49
- Figure 2 - Transceiver (DTX-A3): Mast Mounting 410
- Figure 3 - Transceiver (DTX-A3): Fitting Kit 411
- Figure 4 - Suggested Antenna Lifting Arrangement 412
- Figure 5 - Drive Control Unit (GTX-A24): Installation Dimensions 413
- Figure 6 - Mains Isolator: Installation Dimensions 414
- Figure 7 - Transceiver (DTX-A3): Cableform Routing 419
- Figure 8 - Drive Control Unit (GTX-A24): Cableform Routing 420
- Figure 9 - Cable Gland: Assembly 421
- Figure 10 - Transceiver (DTX-A3): External Connections 423
- CHAPTER 5
- CHAPTER 6
- CONTENTS
- INTRODUCTION 63
- PLANNED MAINTENANCE 63
- DIAGNOSTIC MAINTENANCE 64
- CORRECTIVE MAINTENANCE 611
- TRANSCEIVER (DTX-A3) 612
- Access 612
- Removal of Rotating Joint (45-750-0034-001) 612
- Replacement of Rotating Joint (45-750-0034-001) 613
- Removal of Gearbox and Motor (55-100-0273-001) 613
- Replacement of Gearbox and Motor (55-100-0273-001) 613
- Removal of Azimuth Encoder (GTX-A188) 613
- Replacement of Azimuth Encoder (GTX-A188) 613
- Transceiver (DTX-A115) - Removal 614
- Transceiver (DTX-A115) - Replacement 614
- Power Supply (45-690-0062-002) and PSU Sense PCB (DTX-A121) - Removal 615
- Power Supply (45-690-0062-002) and PSU Sense PCB (DTX-A121) - Replacement 615
- CAN Adapter PCB (NNR-A981) - Removal 615
- CAN Adapter PCB (NNR-A981) - Replacement 615
- SharpEye Azimuth Interface PCB (DTX-A151) - Removal 616
- SharpEye Azimuth Interface PCB (DTX-A151) - Replacement 616
- DRIVE CONTROL UNIT (GTX-A24) 618
- CHECKS AFTER UNIT REPLACEMENT 620
- TRANSCEIVER (DTX-A3) 612
- ILLUSTRATIONS
- CONTENTS
- CHAPTER 7
- INSTALLATION AND SERVICE REPORTS
47 The inverter is switched on by applying +12 V to +28 V across PLA pins 1 and 2 on the
Drive Control PCB. The positive voltage is routed via PLC pin 5 to the Man Aloft
Keyswitch (SW1), which is located on the top of the unit. This switch disables the +12 V to +28 V
to the inverter when set to the OFF position, thus switching the inverter off, regardless of the
input condition, provided the inverter has been set for remote operation. The key is removable in
the OFF position only and is captive in the ON position. This enables antenna rotation to be
inhibited to allow safe man aloft working.
WARNING
THE INVERTER MUST BE SET TO REMOTE OPERATION TO ENABLE THE
KEYSWITCH TO SWITCH THE INVERTER ON AND OFF. UNDER NO
CIRCUMSTANCES SET THE INVERTER TO LOCAL OPERATION AS THIS
WILL OVERRIDE THE SAFETY FUNCTION.
48 The voltage from the keyswitch is routed to PLC pin 6 on the Drive Control PCB. When
the +12 V to +28 V is present at PLC pin 6, an opto-isolator on the Drive Control PCB is
switched on, linking PLB pins 1 and 2 to switch the inverter on. When the +12 V to +28 V is not
present at PLC pin 6, either by the absence of the input on PLA pin 1 or by the keyswitch being set
to OFF, the opto-isolator is switched off and PLB pins 1 and 2 are open circuit, thus switching the
inverter off.
49 A MOTOR ON LED (D1) on top of the unit is lit when 3-phase power is available to the
motor from the inverter. Two of the phases from the inverter are passed to the Drive
Control PCB, which converts the signal to a DC level suitable for the LED.
50 Each output wire passes through a ferrite core to reduce the rate of rise of current, which
reduces the generation of interference. The ferrite cores form part of the output cable.
51 The inverter is used with Speed 1 and Speed 2 inputs, which operate in the same way, so
only Speed 1 input is described. Speed 1 switches on an opto-isolator when PLA pin 3 is
connected to the negative side of the start input (PLA pin 2) and +12 V to +28 V is present at PLC
pin 6. The output is used to link the appropriate inverter speed selector terminals. Using Speed 1
input gives a two speed selection, depending on whether PLA pin 3 is connected to PLA pin 2 or
is open circuit. In this application PLA pin 3 is linked to PLA pin 2 for low speed and is open
circuit for high speed. Speed 2 (PLA pin 4) is always linked to PLA pin 2.
52 Future enhancements will allow the Drive Control Unit to provide the facility to select up
to four antenna speeds, by controlling Speed 1 and Speed 2 inputs from an external
source. This will allow one of up to four preset speeds to be selected to meet the operational
requirements of the system.
KH1264
Chap ter 3
Page 3.18 Is sue 2