Calian SatService sat-nms ACU-ODM User manual

Antenna Controller
sat-nms ACU-ODM
User Manual
Version 5.0.002
© Copyright
SatService Gesellschaft für Kommunikationssysteme mbH
Hardstrasse 9
D-78256 Steisslingen
[e-mail]
www.satnms.com
www.satservicegmbh.de
Tel [phone]

Table Of Contents
1Table Of Contents ...............................................................................................................................
3sat-nms ACU-ODM User Manual .......................................................................................................
41 Introduction ......................................................................................................................................
62 Safety Instructions ...........................................................................................................................
73 The sat-nms ACU-ODM ..................................................................................................................
74 Installation ........................................................................................................................................
74.1 Mechanical installation ..............................................................................................................
84.2 Interfaces to the Antenna, Pin descriptions ...............................................................................
84.2.1 Connector Layout ................................................................................................................
84.2.2 Pin descriptions ..................................................................................................................
214.2.3 Power Supply Cabling .......................................................................................................
214.3 Start-up ....................................................................................................................................
224.3.1 Setting the IP Address .......................................................................................................
234.3.2 Limit switches ...................................................................................................................
234.3.3 Angle detectors .................................................................................................................
244.3.4 Motors ...............................................................................................................................
244.3.5 Pointing/ Tracking ..............................................................................................................
244.3.6 Backup of ACU settings ....................................................................................................
255 Operation .......................................................................................................................................
265.1 The Web-based User Interface ...............................................................................................
275.2 Antenna Pointing ......................................................................................................................
295.3 Target Memory .........................................................................................................................
305.4 Tracking Parameters ...............................................................................................................
325.5 Test Page ................................................................................................................................
345.6 Setup .......................................................................................................................................
405.7 Handheld Terminal ...................................................................................................................
416 Frontpanel operation ......................................................................................................................
436.1 Display mode ..........................................................................................................................
436.2 The main menu .......................................................................................................................
446.3 Select targets ..........................................................................................................................
446.4 Set tracking mode ...................................................................................................................
446.5 Step move ...............................................................................................................................
456.6 Jog mode .................................................................................................................................
456.7 Standby ...................................................................................................................................
456.8 Set az, el, pl by editing Numeric Parameters .........................................................................
467 Remote Control .............................................................................................................................
467.1 General command syntax .......................................................................................................
477.2 The TCP/IP remote control interface ......................................................................................
477.3 The RS232 remote control interface .......................................................................................
487.4 Parameter list ..........................................................................................................................
587.5 One line read via TCP/IP .........................................................................................................
598 Theory of Operation .......................................................................................................................
598.1 Angle Measurement .................................................................................................................
608.2 Pointing / Motor Control ...........................................................................................................
618.3 Steptrack .................................................................................................................................
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628.3.1 The sat-nms Steptrack Algorithm .....................................................................................
638.3.2 ACU and Beacon Receiver ...............................................................................................
648.3.3 Smoothing .........................................................................................................................
658.3.4 Steptrack Parameters .......................................................................................................
668.4 Adaptive Tracking ....................................................................................................................
678.4.1 The sat-nms Adaptive Tracking Algorithm ........................................................................
698.4.2 The Tracking Memory .......................................................................................................
708.4.3 Adaptive Tracking Parameters ..........................................................................................
718.5 Program Tracking ....................................................................................................................
718.5.1 Practical Usage .................................................................................................................
728.5.2 File Format ........................................................................................................................
728.6 Faults and Tracking .................................................................................................................
739 Specifications ................................................................................................................................
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sat-nms ACU-ODM User Manual
Version 5.0.002 -- 2021-07-29 -- © 2003-2021 SatService GmbH
Abstract
The sat-nms Antenna Control Unit (Outdoor Module) is an antenna controller / positioner
with optional satellite tracking support. It may be operated as a stand alone unit or in
conjunction of the sat-nms ACU-IDU, a PC based indoor unit which offers extended tracking
capabilities and a full featured visualization interface. The ACU-ODM is designed as a
closed, compact module, prepared for mounting on a 35mm DIN rail.
This document describes how to install, setup and operate this antenna controller.
Table Of Contents
1 Introduction
2 Safety Instructions
3 The sat-nms ACU-ODM
4 Installation
4.1 Mechanical installation
4.2 Interfaces to the Antenna, Pin descriptions
4.2.1 Connector Layout
4.2.2 Pin descriptions
4.2.3 Power Supply Cabling
4.3 Start-up
4.3.1 Setting the IP Address
4.3.2 Limit switches
4.3.3 Angle detectors
4.3.4 Motors
4.3.5 Pointing/ Tracking
4.3.6 Backup of ACU settings
5 Operation
5.1 The Web-based User Interface
5.2 Antenna Pointing
5.3 Target Memory
5.4 Tracking Parameters
5.5 Test Page
5.6 Setup
5.7 Handheld Terminal
6 Frontpanel operation
6.1 Display mode
6.2 The main menu
6.3 Select targets
6.4 Set tracking mode
6.5 Step move
6.6 Jog mode
6.7 Standby
6.8 Set az, el, pl by editing Numeric Parameters
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7 Remote Control
7.1 General command syntax
7.2 The TCP/IP remote control interface
7.3 The RS232 remote control interface
7.4 Parameter list
7.5 One line read via TCP/IP
8 Theory of Operation
8.1 Angle Measurement
8.2 Pointing / Motor Control
8.3 Steptrack
8.3.1 The sat-nms Steptrack Algorithm
8.3.2 ACU and Beacon Receiver
8.3.3 Smoothing
8.3.4 Steptrack Parameters
8.4 Adaptive Tracking
8.4.1 The sat-nms Adaptive Tracking Algorithm
8.4.2 The Tracking Memory
8.4.3 Adaptive Tracking Parameters
8.5 Program Tracking
8.5.1 Practical Usage
8.5.2 File Format
8.6 Faults and Tracking
9 Specifications
1 Introduction
The sat-nms Antenna Control Unit is an antenna controller / positioner with optional satellite
tracking support. It may be operated as a standalone unit or in conjunction of the sat-nms ACU-
IDU, a PC based indoor unit which offers extended tracking capabilities and a full featured
visualization interface.
The sat-nms ACU is available as:
sat-nms ACU-ODM: only the core-module integrated in a compact case prepared for
mounting on a 35mm DIN rail
sat-nms ACU-ODU: complete antenna controller system for AC- or DC-Motors integrated in
an outdoor cabinet that could be mounted directly to the antenna. By mounting a sat-nms
LBRX beacon receiver into this cabinet, you have a complete antenna tracking system in a
compact cabinet directly at your antenna.
sat-nms ACU-RMU: complete antenna controller system for AC-Motors integrated in a 6RU
19inch rack mount case for indoor use
sat-nms ACU19: complete antenna controller system for DC-Motors integrated in a 1RU
19inch rack mount case for indoor use
For detailed description please refer to the sat-nms documentation CD or www.satnms.com/doc
Main benefits of the sat-nms ACU are:
The ACU outdoor unit is able to act as a standalone antenna control and tracking system
without an indoor unit required.
The ACU provides an Ethernet interface using the TCP/IP and HTTP Internet protocols. It
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can be controlled using any PC providing an Ethernet interface and a web browser like the
Microsoft Internet Explorer. The ACU runs a web server which acts as a user interface to the
antenna controller.
The ACU is prepared to read the receive level of a sat-nms beacon receiver through the
TCP/IP interface.
The flexible interface design of the ACU enables it to control most types of motor driving
antennas for geostationary satellites. Supported motor controllers are (configurable in the
field):
Power relays: This simple solution is suitable for antennas using 2-speed AC motors.
Freque ncy inv erters: Speed and acceleration ramps are programmed into the inverter
module with this solution.
Servo controllers: Used for DC motors at small antennas. Supported position sensors are
(separate hardware interface modules for each axis:
Resolver Interface: The resolver interface module contains a resolver to digital chip which
does the decoding of the resolver sin/cos signals.
SSI Interface : SSI is a high speed serial interface used by modern digital position encoders.
DC Voltage Interface: The third position encoder interface module contains an A/D
converter which is suited to measure the DC voltages produced by simple inductive angle
encoders. This application is for small antennas especially in the SNG business.
The paragraphs below give a short overview to the contents of the documentation. A subset of
this documentation is stored on the device itself, the complete documentation is available on the
sat-nms documentation CD and at www.satnms.com .
Safety Instructions : This chapter gives an overview about the safety precautions that have
to be observed during installation, operation and maintenance.
Unit Overview : The installation chapter gives informations about the different modules that
are integrated in the ACU (not ACU-ODM and ACU19).
Installation/Start-up : The installation chapter guides through the installation and setup of the
ACU outdoor module. It describes the mechanical concept of the ACU and the assignment of
the ACU's connectors. It gives you informations about the starting up procedure. Finally you
learn in this chapter how to set the ACU's IP address, which is a essential precondition to
operate the ACU by means of a web browser.
Operation : The sat-nms ACU is operated using a standard web browser like the Internet-
Explorer on MS Windows based computers. The user interface design is straight forward and
clearly structured. Operating the ACU is mostly self-explanatory. Nevertheless, the
'Operation' chapter outlines the map of web pages which make up the ACU user interface
and elaborately describe the meaning of each alterable parameter.
Frontpanel Operation : The sat-nms ACU19 and the sat-nms ACU-RMU optionally are
equipped with a frontpanel Human-Machine-Interface. This chapter describes how to use this
interface.
Remote Control : The ACU outdoor module provides a versatile remote control interface. A
monitoring & control software may fully operate the ACU either through a TCP/IP network
connection or through the RS232 interface of the ACU. This chapter describes the
communication protocol used for remote control and lists all parameters accessible through
the remote interface.
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Theory of Operation : This chapter gives a short overview how the ACU works. It also
describes the different tracking algorithms and their parameters. The interaction with a
beacon receiver is described as well. Knowing about the theory regarding this functions
helps to find the best parameter settings for a given application.
Specifications : At the end of the document, the specifications applicable to the sat-nms ACU
are summarized in this chapter.
Support and Assistance
If you need any assistance regarding our ACU, don't hesitate to contact us. We would be pleased
to help you by answering your questions.
SatService GmbH
Hardstrasse 9
78256 Steisslingen
Germany
phone [phone]
www.satnms.com
2 Safety Instructions
Safe ty
The mains shall only be connected provided with a protective earth wire. Any interruption of the
protective wire, inside or outside the sat-nms ACU, is likely to make the unit dangerous.
Intentional interruption is prohibited.
The unit described in this manual is designed to be used by properly-trained personnel only.
Adjustment, maintenance and repair of the exposed equipment shall be carried out only by
qualified personnel who are aware of hazards involved.
Refer servicing to qualified personnel.
To prevent electrical shock, do not remove covers.
For the correct and safe use of the instrument, it is essential that both operating and servicing
personnel follow generally accepted safety procedures in addition to the safety precautions
specified in this manual.
Whenever it is likely that safety protection is impaired, the unit must be made in-operative and
secured against unintended operation. The appropriate servicing authority must be informed. For
example, safety is likely to be impaired if the unit fails to perform the intended measurements or
shows visible damage.
Ensure that the cabinet is proper connected to the protective earth conductor.
The circuit breaker, that fuses the mains for the sat-nms ACU has to switch off all phases AND the
neutral wire as well.
WARNINGS
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The outside of the equipment may be cleaned using a lightly dampened cloth. Do not use
any cleaning liquids containing alcohol, methylated spirit or ammonia etc.
Follow standard Electrostatic Discharge (ESD) procedures when handling the Unit.
Apply the appropriate voltage according to the attached schematic.
In case of switching off all the circuit breakers is still voltage available at the mains terminals!
Only use shielded cable to connect the AZ- and EL-Motor. The other components in the
cabinet might be jammed through the harmonic waves the frequency inverters inject into the
motor wires.
Use only double shielded twisted pair cables (e.g. CAT7 Ethernet cable) to connect the
resolvers to the sat-nms ACU
Only ACU-ODU : If the Unit is equipped with an optional air ventilation, avoid direct contact
with jets of water, normal rain is no problem.
3 The sat-nms ACU-ODM
The sat-nms Antenna Control Unit (Outdoor Module) is an antenna controller / positioner with
optional satellite tracking support. It may be operated as a stand alone unit or in conjunction of
the sat-nms ACU-IDU, a PC based indoor unit which offers extended tracking capabilities and a
full featured visualization interface. The ACU-ODM is designed as a closed, compact module,
prepared for mounting on a 35mm DIN rail.
Below the top viw and connector layout of the ACU outdoor module is shown. Except the network
connector which is a standard 10-Base-T Ethernet socket, all connectors are Phoenix Contact
Combicon plugs / clamps.
Inside, the ACU consists of a main board and two or three interface boards with the circuitry for
the position sensors. These boards are different for each type of position sensor. Actually
interfaces for three types of position encoders are available with the sat-nms ACU:
resolvers
SSI digital position encoders
analog voltage based sensors
You have to decide at date of order which interfaces you need.
The sat-nms ACU-ODM is powered by 2 different power supplies:
24V ACU: for ACU internal use, especially for the core processor
24V EXT: for external signals, e.g. limit switches, drive signals etc. By this a maximal reliability
of the sat-nms ACU-ODM is ensured.
4 Installation
The following chapter describes how to install the ACU-ODM mechanically and electrically.
Additional a detailed start-up procedure is given in this chapter.
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4.1 Mechanical installation
The ACU enclosure is DIN rail mountable. Hence simply snap the module on to the rail to fix it. For
plain wall mount, fix a 450 mm piece of DIN rail at the wall with at least four screws and lock the
ACU on this.
4.2 Interfaces to the Antenna, Pin descriptions
ATTENTION! Electrical installation shall be carried out only by qualified personnel who are
instructed and aware of hazards of electrical shocks.
The sat-nms ACU provides a lot of input/output signals. They all are described in the following
chapters. Many applications do not require all ports of the ACU to be cabled. For a minimum
antenna control functionality however you should connect the following to the ACU:
A computer via Ethernet, so you can configure the ACU through it's Web-interface
The power supply (24V, regulated)
The azimuth position sensor
The azimuth motor driver circuitry
The elevation position sensor
The elevation motor driver circuitry
4.2.1 Connector Layout
Below the connector layout of the ACU outdoor module is shown. Except the network connector
which is a standard 10-Base-T Ethernet socket, all connectors are Phoenix Contact mini
Combicon plugs / clamps which are delivered together with the sat-nms ACU-ODM. Pin 1 of each
connector is the rightmost if you look at the screws of the connector and the plugs are directed to
you.
Inside, the ACU consists of a main board and two or three interface boards with the circuitry for
the position sensors. These boards are different for each type of position sensor. Actually
interfaces for three types of position encoders are available with the sat-nms ACU:
resolvers
SSI digital position encoders
analog voltage based sensors
4.2.2 Pin descriptions
CON1 LAN Connector
CON1 is the Ethernet 10Base-T / RJ45 connector. Use a standard network cable to connect the
ACU to an Ethernet hub. If you want to connect your computer and the ACU directly without using
a hub, you need a crossover cable for this with swapped RX/TX lines.
pin signal description type
1 TX+ default Ethernet cabling (10Base-T) OUT
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1 TX+ default Ethernet cabling (10Base-T) OUT
2 TX- OUT
3 RX+ IN
4
5
6 RX- IN
7
8
CON2 Spare Inputs
CON2 provides four opto-isolated spare inputs for the ACU. These inputs are reserved for
customized versions of the ACU software, they normally are not used. There is no cabling
required.
pin signal description type
1 AUX1 IN A IN+
2 AUX1 IN K IN-
3 AUX2 IN A IN+
4 AUX2 IN K IN-
5 AUX2 IN A IN+
6 AUX2 IN K IN-
7 AUX2 IN A IN+
8 AUX2 IN K IN-
CON3 24V-EXT Distribution
CON3 provides eight clamps to the 24V-EXT rail. It has been included to simplify the external
cabling.
pin signal description type
1 24V_EXT
2 24V_EXT
3 24V_EXT
4 24V_EXT
5 24V_EXT
6 24V_EXT
7 24V_EXT
8 24V_EXT
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8 24V_EXT
CON4 Spare Outputs 5..8
CON4 provides four opto-isolated spare outputs for the ACU. These inputs are reserved for
customized versions of the ACU software, they normally are not used. There is no cabling
required.
pin signal description type
1 AUX 5 OUT C OUT+
2 AUX 5 OUT E OUT-
3 AUX 6 OUT C OUT+
4 AUX 6 OUT E OUT-
5 AUX 7 OUT C OUT+
6 AUX 7 OUT E OUT-
7 AUX 8 OUT C optional heartbeat signal OUT+
8 AUX 8 OUT E optional heartbeat signal OUT-
The AUX 8 output may be configured to act as a heartbeat output. If enabled, the output switches
every 1000 ms between on/off. If using this signal for an external watchdog circuit, be aware the
in adaptive tracking mode delays of some seconds are possible while the acu calculates the
orbital model.
CON5 Spare Outputs 1..4
CON5 provides another four opto-isolated spare outputs for the ACU. These inputs are reserved
for customized versions of the ACU software, they normally are not used. There is no cabling
required.
pin signal description type
1 AUX 1 OUT C OUT+
2 AUX 1 OUT E OUT-
3 AUX 2 OUT C OUT+
4 AUX 2 OUT E OUT-
5 AUX 3 OUT C OUT+
6 AUX 3 OUT E OUT-
7 AUX 4 OUT C OUT+
8 AUX 4 OUT E OUT-
CON6 Beacon Receiv er
The ACU preferably is used together with the sat-nms LBRX beacon receiver. With the sat-nms
LBRX the ACU talks though TCP/IP, no additional cabling is required in this case. At CON6 the
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ACU provides an analog interface to third party beacon receivers.
pin signal description type
1 Beacon Level beacon level signal 0..10V IN
2 GND
3 PRESET 1 C beacon receiver preset activation OUT+
4 PRESET 1 E OUT-
5 PRESET 2 C beacon receiver preset activation OUT+
6 PRESET 2 E OUT-
7 PRESET 3 C beacon receiver preset activation OUT+
8 PRESET 3 E OUT-
9 PRESET 4 C beacon receiver preset activation OUT+
10 PRESET 4 E OUT-
CON7 Inclinometer
The ACU provides two ADC inputs to read the angle information from ratiometric inclinometers like
the Schaevitz AccuStar. The standard ACU software reads this information and displays it at the
'Test' page of the software, but it does not include the nick/roll angles into the displayed antenna
pointing.
pin signal description type
1 +9V roll reference output (9VDC) OUT
2 VRAT X roll measurement input IN
3 GND roll ground
4 +9V nick reference output (9VDC) OUT
5 VRAT Y nick measurement input IN
6 GND nick ground
CON8 Serial Interfaces
The ACU owns two serial interfaces. The first is reserved to poll a GPS receiver in order to get the
antenna geodetic location automatically. Any NMEA standard GPS receiver providing a RS232
interface may be connected here.
The second interface is used to control the ACU from remote where the TCP/IP remote control is
not usable. This interface may be configured to work as a RS232 or RS422 interface by jumpers
inside the ACU.
pin signal description type
1 RS232 0 TX RS232 for GPS receiver OUT
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2 RS232 0 RX IN
3 GND
4 RS232 1 TX RS232 for remote control OUT
5 RS232 1 RX IN
6 GND
7 RS422 TX+ RS422 for remote control OUT+
8 RS422 TX- OUT-
9 RS422 RX+ IN+
10 RS422 RX- IN-
The ACU is factory preset to use the RS422 interface in 4-wire configuration. To change the
interface configuration, set the jumpers on the ACU main board above CON8 according to the
illustration below
JP1 selects between the RS232 and the RS422 interface driver. Put the jumper to position 1-
2 (left) to select the RS232 interface.
JP2 switches between the RS422 4-wire mode and RS485 2-wire mode. To select RS485 2-
wire mode put the jumper to position 1-2 (left). Use the TX data lines (CON8 Pins 7, 8) in this
mode.
JP4 and JP5 activate 100 Ohms termination resistors between the RS422 data lines. The
lines are terminated if the jumper is set.
CON9 Power Supply
At CON9 the power supply for the ACU itself (pins 1, 2) and for the external switches must be
connected. Also see chapter 4.2.3 Power Supply Cabling for the concept of separate intern /
extern power supplies the ACU uses.
pin signal description type
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1 +24V ACU power supply for the ACU and the
2 GND ACU positional encoders
3 +24V EXT power supply for motor drivers and
4 GND EXT external switches
CON10 Azimuth M otor Driver
All signals for motor control are provided as free floating opto coupler inputs / outputs. This gives
a maximum of flexibility to adapt the cabling to the motor driver units. They probably will combine
one end of the control inputs to a common potential. The ACU is capable to control motor drivers
with different polarity concepts.
--- Example for wiring the
motor drive signals
--- Example for
wiring the motor status signals
The ACU knows two different configuration modes to control a motor driver. They are called 'DIR-
START' and 'DUAL-START'. In 'DIR-START' mode, the 'FWD' signal switches the motor on/off, the
'REV' signal controls the motor direction. This is the configuration many frequency inverters use.
In 'DUAL-START' mode, the 'FWD' signal switches the motor on in forward direction, 'REV'
activates the motor in reverse direction. This configuration mode is convenient to control a motor
with relays.
The movement direction for the azimuth drive must be cabled as follows: FWD moves the antenna
to the west (to the right on the northern hemisphere). The evaluation routines in the software
which compute the antenna pointing for a given satellite location require the movement direction
in this way.
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The AZ RESERV reflects the "motor stopped" state of the axis. ON signals the OK state, the
signal turns off in case of a motor fault, timeout, or if the emergency stop signal is received.
Depending on the reason of the motor stop a motor reset command may be neccessary to
release the axis from this state.
pin signal DUAL-START DIR-START type
1 AZ FWD E ON = motor on / right ON = motor on OUT-
2 AZ FWD C OFF = motor off OUT+
3 AZ REV E ON = motor on / left ON = direction left OUT-
4 AZ REV C OFF = direction right OUT+
5 AZ SPD1 E ON = slow ON = slow OUT-
6 AZ SPD1 C OUT+
7 AZ SPD2 E ON = fast ON = fast OUT-
8 AZ SPD2 C OUT+
9 AZ RES E reset driver reset driver OUT-
10 AZ RES C OUT+
11 AZ RESERV E axis stopped axis stopped OUT-
12 AZ RESERV C OUT+
13 AZ FAULT K driver fault driver fault IN-
14 AZ FAULT A IN+
CON11 24V-EXT Distribution
CON11 provides four clamps to the 24V-EXT rail. It has been included to simplify the external
cabling.
pin signal description type
1 +24V EXT
2 +24V EXT
3 +24V EXT
4 +24V EXT
CON12 GND-EXT Distribution
CON12 provides four clamps to the GND-EXT rail. It has been included to simplify the external
cabling.
pin signal description type
1 GND EXT
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2 GND EXT
3 GND EXT
4 GND EXT
CON13 Elevation M otor Driver
All signals for motor control are provided as free floating opto coupler inputs / outputs. This gives
a maximum of flexibility to adapt the cabling to the motor driver units. They probably will combine
one end of the control inputs to a common potential. The ACU is capable to control motor drivers
with different polarity concepts.
--- Example for wiring the
motor drive signals
--- Example for
wiring the motor status signals
The ACU knows two different configuration modes to control a motor driver. They are called 'DIR-
START' and 'DUAL-START'. In 'DIR-START' mode, the 'FWD' signal switches the motor on/off, the
'REV' signal controls the motor direction. This is the configuration many frequency inverters use.
In 'DUAL-START' mode, the 'FWD' signal switches the motor on in forward direction, 'REV'
activates the motor in reverse direction. This configuration mode is convenient to control a motor
with relays.
The movement direction for the azimuth drive must be cabled as follows: FWD moves the antenna
to the west to the right on the northern hemisphere. The evaluation routines in the software which
compute the antenna pointing for a given satellite location require the movement direction in this
way.
The EL RESERV reflects the "motor stopped" state of the axis. ON signals the OK state, the
signal turns off in case of a motor fault, timeout, or if the emergency stop signal is received.
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Depending on the reason of the motor stop a motor reset command may be neccessary to
release the axis from this state.
pin signal DUAL-START DIR-START type
1 EL FWD E ON = motor on / right ON = motor on OUT-
2 EL FWD C OFF = motor off OUT+
3 EL REV E ON = motor on / left ON = direction left OUT-
4 EL REV C OFF = direction right OUT+
5 EL SPD1 E ON = slow ON = slow OUT-
6 EL SPD1 C OUT+
7 EL SPD2 E ON = fast ON = fast OUT-
8 EL SPD2 C OUT+
9 EL RES E reset driver reset driver OUT-
10 EL RES C OUT+
11 EL RESERV E axis stopped axis stopped OUT-
12 EL RESERV C OUT+
13 EL FAULT K driver fault driver fault IN-
14 EL FAULT A IN+
CON14 GND-EXT Distribution
CON12 provides eight clamps to the GND-EXT rail. It has been included to simplify the external
cabling.
pin signal description type
1 GND EXT
2 GND EXT
3 GND EXT
4 GND EXT
5 GND EXT
6 GND EXT
7 GND EXT
8 GND EXT
CON15 Polarization Motor Driver
All signals for motor control are provided as free floating opto coupler inputs / outputs. This gives
a maximum of flexibility to adapt the cabling to the motor driver units. They probably will combine
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one end of the control inputs to a common potential. The ACU is capable to control motor drivers
with different polarity concepts.
--- Example for wiring the
motor drive signals
--- Example for
wiring the motor status signals
The ACU knows two different configuration modes to control a motor driver. They are called 'DIR-
START' and 'DUAL-START'. In 'DIR-START' mode, the 'FWD' signal switches the motor on/off, the
'REV' signal controls the motor direction. This is the configuration many frequency inverters use.
In 'DUAL-START' mode, the 'FWD' signal switches the motor on in forward direction, 'REV'
activates the motor in reverse direction. This configuration mode is convenient to control a motor
with relays.
The movement direction for the polarization drive must be cabled as follows: FWD moves the feed
clockwise when looking 'through the antenna' to the satellite. This is valid for the northern
hemisphere, when operated on the southern hemisphere, the motor must be cabled for the
opposite direction. The evaluation routines in the software which compute the antenna pointing
for a given satellite location require the movement direction in this way.
The PL RESERV reflects the "motor stopped" state of the axis. ON signals the OK state, the
signal turns off in case of a motor fault, timeout, or if the emergency stop signal is received.
Depending on the reason of the motor stop a motor reset command may be necessary to release
the axis from this state.
pin signal DUAL-START DIR-START type
1 PL FWD E ON = motor on / right ON = motor on OUT-
2 PL FWD C OFF = motor off OUT+
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3 PL REV E ON = motor on / left ON = direction left OUT-
4 PL REV C OFF = direction right OUT+
5 PL SPD1 E ON = slow ON = slow OUT-
6 PL SPD1 C OUT+
7 PL SPD2 E ON = fast ON = fast OUT-
8 PL SPD2 C OUT+
9 PL RES E reset driver reset driver OUT-
10 PL RES C OUT+
11 PL RESERV E axis stopped axis stopped OUT-
12 PL RESERV C OUT+
13 PL FAULT K driver fault driver fault IN-
14 PL FAULT A IN+
CON16 Limit Switches
The limit switch inputs internally are connected to the external 24V / GND rails. The switches are
connected directly to the input pairs without any external ground or supply cabling. The ACU
treats a closed contact as OK, contacts have to be opened to indicate the 'limit reached'
condition.
--- Example for wiring the limit switches
Please note, that the left/right azimuth and polarization limit switches have to be swapped when
the antenna is operated at the southern hemisphere.
pin signal description type
1 AZ High azimuth right limit (view from behind antenna) IN
2 GND EXT IN
3 AZ Low azimuth left limit (view from behind antenna) IN
4 GND EXT IN
5 El High upper limit Elevation IN
6 GND EXT IN
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7 El Low lower limit Elevation IN
8 GND EXT IN
9 Pol High polarization right limit (view from behind antenna) IN
10 GND EXT IN
11 Pol Low polarization left limit (view from behind antenna) IN
12 GND EXT IN
CON17 Alarm Circuits
The alarm/stop switch inputs internally are connected to the external 24V / GND rails. The
switches are connected directly to the input pairs without any external ground or supply cabling.
The ACU treats a closed contact as OK, contacts have to be opened to activate the function
noted in the table below.
The fault output are mechanical relays which connect '_C' (common) circuit to the '_NC' (normally
closed) circuit while the ACU is powered and OK. In case of a fault or a lack of power supply the
relays connect the '_NO' circuit to the '_C' circuit.
pin signal description type
1 EMER_STOP emergency stop (OK if closed) IN
2 GND_EXT IN
3 ANT_HUB_FAULT alarm: hub fault (OK if closed) IN
4 GND_EXT IN
5 SW_CAB_OPEN alarm: cabinet open (OK if closed) IN
6 GND_EXT IN
7 ACU_FLT_NC acu alarm (connected to 9 if OK) RELAY
8 ACU_FLT_NO (connected to 9 if there is a FAULT) RELAY
9 ACU_FLT_C RELAY
10 TRK_FLT_NC tracking alarm (connected to 12 if OK) RELAY
11 TRK_FLT_NO (connected to 12 if there is a FAULT) RELAY
12 TRK_FLT_C RELAY
CON18, CON19, CON20 Resolver Inte rface
Below the pinout of a resolver type interface board is shown. The ACU is available with resolver,
SSI or analog position sensor interfaces. You have to select type of interface when you order the
ACU.
pin signal description type
1 GND
2 SIN resolver SIN IN
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