Alignsat 39107D Antenna Drive unit

Description of ADU Operation

ADU is mainly used to control 3-phase motor, which drives the antenna. The control of ACU to the antenna is also realized by ADU. The front panel of ADU is illustrated in Figure.1
 

1.1 Control Switch (LOCAL)
Press the LOC key and ADU is in the local control mode. The antenna rotation can be controlled in each direction such as CW, CCW, UP ,DOWN PCW and PCCW by the switch on the front panel of ADU.Release the LOC key and ADU is under the control of ACU. Under such a mode, the antenna is driven to rotate by ACU.

1.2 Control Switch of Direction (CW, CCW, UP, DOWN), (PCW and PCCW option)
Press the CW, CCW, UP, DOWN, PCW or PCCW switches, the antenna will rotate towards the corresponding direction. It will stop rotating when the switch is raised.

1.3 Status Indicator
When the antenna rotates to the limit position in some direction, the antenna stops rotating and the limit indicator in this direction is on(red light). When the antenna is rotated in the opposite direction, it will
quit from the limit status.(green light)

2  Input / Output signal Description of ADU
Figure.2 illustrates the rear panel of ADU and the function for each socket is as  follow:
 

2.1 Triphase Power Switch
380V 3 phase power On/Off switch is provided for the purpose of protection.
The switch is a short-circuited, which will automatically cut off when there is short-circuit in ADU or the motor is over-flow.

Note: Don’t blindly apply the power once again when the switch is automatically off. It doesn’t apply the power until the fault is found and cleared.

2.2  CONTROL IN — Signal input of ACU rotation control STATUS OUT — Signal output of ADU status LIMIT IN — Signal input of limit
       POWER IN — Input of 380V 3 phase power
       AZ MOTOR — Output of Az. motor drive EL MOTOR — Output of El. motor drive
       POL MOTOR — Output of POL. motor drive (option)  
       OPTION — Backup  
       FUSE — 220V(110V) / 1.5A