Apollo MX20 Multi-Function Display Installation Manual June 2003 560-1025-07
2003 by UPS Aviation Technologies, Inc. All rights reserved. Printed in the USA. This document and the information disclosed herein are proprietary information of UPSAT. Neither this document nor the information contained herein shall be transmitted, reproduced, copied, or disclosed in any form or by any means without the written authorization of UPSAT.
HISTORY OF REVISIONS Part No. 560-1025-01 Revision --- 560-1025-02 -- 560-1025-02 a 560-1025-02 560-1025-02 560-1025-03 b c -- 560-1025-04 -- 560-1025-05 560-1025-05 560-1025-06 560-1025-07 -a --- Date Description 11/1/99 Initial Release. 11/11/99 Updated installation package contents and equipment mounting information. 1/17/00 Added the MX20 configuration procedure, expanded post installation checkout procedures, added Appendix A. 4/3/00 Clarified unit installation position.
End User License Agreement (“EULA”) Refund. If you do not agree to the terms of this EULA, UPS Aviation Technologies and Microsoft are unwilling to license the MX20 and its Operating System to you. In such event, you may not use or copy the Licensed Product, and you should promptly contact UPS Aviation Technologies for instructions on return of the unused product(s) for a refund. Client Access Licenses.
Table of Contents TABLE OF CONTENTS 1 INTRODUCTION.............................................................................................................................. 1 1.1 ABOUT THIS MANUAL ..................................................................................................................... 1 1.2 SYSTEM DESCRIPTION ..................................................................................................................... 1 1.3 REGULATORY COMPLIANCE .....................
Table of Contents 3 SPECIFICATIONS .......................................................................................................................... 43 3.1 MX20 FEATURES ........................................................................................................................... 43 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 3.1.10 3.1.11 3.1.12 3.1.13 3.1.14 3.2 DISPLAY .......................................................................................................
Table of Contents TABLE 2 - PREFERRED DATA PORT CONFIGURATIONS ............................................................................... 15 TABLE 3 – MX20 I/O DATA PORT CONFIGURATIONS ................................................................................ 16 TABLE 4 – UNIT POWER LOADS .................................................................................................................. 17 TABLE 5 - UNIT WEIGHTS ......................................................................
Table of Contents NOTES iv Apollo MX20 Installation Manual
Introduction 1 INTRODUCTION 1.1 ABOUT THIS MANUAL This manual describes the installation of the Apollo MX20 Multi-Function Display. It is intended for use by persons certified by the Federal Aviation Administration (FAA) to install aircraft navigation devices. It includes installation and checkout procedures for the MX20 to standards described in 14CFR Part 43. Section 1 Provides an introduction to the MX20. TSO certification information is also included in this section.
Introduction Figure 1 – MX20 System Block Diagram Figure 2 - MX20 I/O System Block Diagram 2 Apollo MX20 Installation Manual
Introduction Figure 3 - MX20 Front Panel Description 1.
Introduction "The conditions and tests required for TSO/JTSO approval of this article are minimum performance standards. It is the responsibility of those installing this article either on or within a specific type or class of aircraft to determine that the aircraft installation conditions are within the TSO/JTSO standards. The article may be installed only if the installation is performed in accordance with Part 43 or the applicable airworthiness requirements.” 1.
Introduction Table 1 - Installation Package Contents Part # Unit 430-0270-0xx 430-0270-5xx 430-0270-6xx 430-0270-7xx 115-0007-00 162-1008 162-1060 162-1577* 202-0001 204-0037 204-2100 220-0637 240-0615 224-0404 245-0027* 310-0429-xx 998-0048 Description Apollo MX20 Multifunction Display with GPS Apollo MX20 Multifunction Display without GPS Apollo MX20 I/O Traffic Multifunction Display Apollo MX20 I/O Traffic/Radar Multifunction Display MX20 Installation Kit GPS 1575 MHz 2:1 splitter Right angle coax plu
Introduction 1.6 SPECIAL TOOLS REQUIRED Crimp Tool A crimp tool meeting MIL specification M22520/1-01 and a positioner/locator are required to ensure consistent, reliable crimp contact connections for the rear d-sub connectors. Examples of these tools are shown below: For pin P/N 245-0027 ITT Cannon 1851 E. Deere Ave. Santa Ana, CA 92705-6500 Phone (714) 261-5300 Fax (714) 575-8324 Insertion tool: ITT part # 274-7006-000 (Desc. CIET-20HD) Regular duty Crimp tool: ITT part # 995-0001-585 (Desc.
Installation 2 INSTALLATION This section describes the installation of the MX20 including mounting, wiring, connections, and software configuration. A post-installation checkout procedure is included at the end of this section. 2.1 PRE-INSTALLATION INFORMATION Always follow good avionics installation practices per FAA Advisory Circulars (AC) 43.13-1B, 43.13-2A, and AC 20-138, or later FAA approved revisions of these documents.
Installation Figure 4 - Cockpit Panel Configuration for a Large Panel Figure 5 - Cockpit Panel Configuration for a Small Panel 8 Apollo MX20 Installation Manual
Installation Figure 6 - Sample GX60 & MX20 Mounting Figure 7 - Alternate MX20 Mounting Configuration NOTE This configuration utilizes an angle bracket along each side of the mounting tube. The installer must consider the structural integrity of the installation as defined in AC43.13.2a Chapter 1.
Installation Figure 8 - MX20 Unit Dimensions NOTE Use of mounting tube P/N 310-0429-01, or later FAA approved revision, is recommended for all installations and is required for helicopter installations.
Installation Figure 9 - MX20 Mounting Tube Assembly Dimensions Note: Use of mounting tube P/N 310-0429-01, or later FAA approved revision, is recommended for all installations and is required for helicopter installations. 2.3.
Installation Down: Right: Left: 30 degrees off pilot’s eye center line 50 degrees off pilot’s eye center line 50 degrees off pilot’s eye center line 2.4 EQUIPMENT MOUNTING Once the cable assemblies have been made, attach each connector to the rear connector mounting plate and the mounting tube as illustrated in Figure 10. Route the wiring bundle as appropriate. Use tie wraps to secure the cable to the rear connector plate to provide strain relief for the cable assembly as shown in View A of Figure 10.
Installation Figure 10 - MX20 Typical Rear Panel Wiring Connections Apollo MX20 Installation Manual 13
Installation 2.5 ELECTRICAL CONNECTIONS The MX20 installation kit includes connectors and crimp contacts. Make the crimp connections with a crimp tool as specified in the Special Tools Required section on page 6. Wires should be 20 to 24 AWG for the 37-pin connector and 22-30 AWG for the 62-pin connector, unless otherwise specified. Power and ground wires should be 20 AWG.
Installation 2.5.1 MX20 BASIC DATA PORT CONFIGURATION The basic MX20 supports four I/O ports on connector J1. Three of the ports are RS232 and one is RS422. The usage of each port is assigned during the configuration procedure (see section 2.7). The diagram below provides an example of a configuration for the data ports. Samples of typical wiring configurations are shown in section 2.5.7.
Installation 2.5.2 MX20 I/O DATA PORT CONFIGURATION The I/O product variation of the MX20 supports an array of additional I/O capabilities on connector J2 as shown below. Note that the hardware connected to the MX20 I/O ports must be connected as shown in Table 3, as reconfiguration by software is not available. See the sample wiring diagrams and connector pinouts in section 2.5.7 for detailed connections. One possible configuration is shown in Figure 13.
Installation 2.5.4 PLACARD The aircraft will have a placard identifying the MFD circuit breaker. The placard will be placed directly adjacent to the respective breaker. 2.5.5 POWER The power and fuse requirements for each external sensor are described in their respective installation manuals. The MX20 will operate on voltages between 10 and 40 VDC. Install a five amp circuit breaker for a 14 VDC aircraft and a three amp circuit breaker for a 28 VDC aircraft.
Installation 2.5.
Installation Figure 15 - Sample System Wiring Diagram (No Internal GPS Version) with WX500 Apollo MX20 Installation Manual 19
Installation Figure 16 - Sample System Wiring Diagram for TCAD and Stormscope 20 Apollo MX20 Installation Manual
Installation Figure 17 - Sample System Wiring Diagram I/O model with Radar, Goodrich Skywatch, and WSI InFlight Receiver Apollo MX20 Installation Manual 21
Installation Figure 18 - Sample System Wiring Diagram of MX20 I/O with Landmark TAWS 22 Apollo MX20 Installation Manual
Installation Figure 19 - Sample System Wiring Diagram of MX20 I/O with Garmin GTX330 Apollo MX20 Installation Manual 23
Installation Figure 20 - Sample System Wiring Diagram of MX20 I/O with KGP-560 2.6 WEIGHT AND BALANCE Weight and balance computation is required after the installation of the MX20. Follow the guidelines as established in AC 43.13-1B, Chapter 10, section 2. Make appropriate entries in the equipment list indicating items added, removed, or relocated along with the date accomplished. Include your name and certificate number in the aircraft records.
Installation 2.7 CONFIGURING THE MX20 & MX20 I/O 1. Turn on power to the MX20. 2. Immediately after the self-test is complete, press line select keys 1, 4, and 6 in sequence before pressing any other keys (where 1 is the top line select key, 4 is the fourth key down, and 6 is the lower most line select key). If other keys are pressed before or during this sequence, the MX20 will be in the normal operational mode. To enter the install mode, turn off the MX20 and start again at step 1.
Installation 2.7.1 ENABLE/DISABLE FUNCTIONS This menu allows the activation or deactivation of MX20 functions. 1. Ensure the Enable/Disable Functions page of the MX20 has the desired configuration. Modifications can be made using the line select keys. a. Enable Message to allow viewing of system messages. b. Enable Custom Map to allow viewing of the Custom Map function. c. Enable IFR En Route Map to allow viewing of the IFR Map function. d.
Installation 4. A typical installation will have all functions enabled except those noted above based on what hardware is installed in the aircraft. 2.7.2 EXTERNAL DATA SOURCE This menu allows the software to assign ports to the installed sensors. 1. Press the DATA smart key while still in the INSTL function. 2. Ensure the External Data Sources pages of the MX20 have the desired configuration. Modifications can be made using the line select keys. Port allocations must match how the system is wired.
Installation Source port must be set to the same port number that the GX model unit is connected to (such as Port 1 in the example shown below).
Installation Next Page 2.7.3 EXTERNAL DATA SOURCE FOR THE MX20 I/O The MX20 I/O allocates fixed data source ports for interface to the radar, TAWS, and traffic sensors. Software configuration is not required for Skywatch, GTX330, or TCAD traffic sensors. The I/O version of the MX20 adds traffic and radar functionality. These data sources are configured in a similar manner as the basic MX20 external sensors. Note that only one traffic source may be connected to the MX20 I/O at one time. 2.7.3.
Installation 2.7.3.5 TRANSPONDER TIS Select the model of the TIS data source selected. Currently, only the Garmin GTX330 is supported. 2.7.4 MISCELLANEOUS SETUP OPTIONS 1. Press the MISC smart key while still in the INSTL function. 2. Ensure the Misc Setup Options pages of the MX20 are configured with respect to the aircraft it is being installed in. Modifications can be made using the line select keys.
Installation 3. Obtain ICAO address of the aircraft from the FAA only if the UAT/ADS-B system is installed. The ICAO address is a unique eight number code assigned to each aircraft. For U.S. registered aircraft, it will be necessary to have a specific address code assigned. These address codes are presently issued by: Federal Aviation Administration FAA Aircraft Registry P.O.
Installation 2.8 MX20 POST INSTALLATION CHECKOUT Once the unit is installed, complete the checkout procedure to verify proper operation. Refer to the MX20 Multi-Function Display User’s Guide, 560-1026-xx, for operating instructions. 2.8.1 MOUNTING / WIRING CHECK Verify that all cables are properly secured and shields are connected to the rear of the mounting frame. Check the movement of the flight and engine controls to verify that there is no interference.
Installation 4. Verify that the external data sources are properly configured to output the proper data to the MX20, i.e., the Apollo GX should be configured to output Moving Map data. If the altitude data is supplied from a GX model unit, it must have extended mode enabled. Step 7-10 Step 12-15 Step 5 5. Check the System Info page on the MX20 to verify that the data is available to each port and that it is being processed properly. 6.
Installation 16. Turn the WSI InFlight sensor on. Verify that the Link data flag is not displayed. 2.8.4 EMI/RFI TEST This test validates that interference does not exist between the MX20 and other systems on the aircraft. Turn off the power to all avionics devices. 2.8.4.1 TEST WITHOUT MX20 1. Start the aircraft engine(s) and switch to engine power, as appropriate. 2. Turn on power to the external GPS navigation source. Clear visibility to satellites is required. 3.
Installation ____ DME ____ ADF ____ VHF Comm Transceiver ____ Encoding Altimeter ____ Flight Director ____ Marker Beacon Receiver ____ Weather Radar ____ Ground Proximity Warning System or Enhanced Ground Proximity Warning System (EGPWS) ____ Autopilot ____ Directional Gyro/HSI ____ RMI ____ TIS-A Sensor ____ WSI InFlight Weather Sensor ____ TAWS Sensor 2.8.5 ALTITUDE TEST 1. Perform the installation and calibration tests in accordance with the altitude source manufacturer’s installation manual. 2.
Installation 5. From the traffic function, or from the SKY1000 display if connected, command a Skywatch Self Test. The status presented in the lower left of the display should change to a white ‘TAS Test’ and clear after several moments. 6. From the Message function, verify that no error messages have been posted from the Skywatch system. 2.8.
Installation 2.8.10.1.2 Calibration Procedures Refer to the Bendix/King RDR 2000 Color Weather Radar System Installation Manual, Revision 4 or later. Follow the instructions in "Stabilization calibration with Radar Indicator" or its equivalent. Skip the description in the RDR 2000 manual on how to enter calibration mode. The MX20 allows a single button push to enter calibration mode. The MX20 MUST be in Install mode to calibrate the radar head. Follow the instructions below. 1. 2. 3. 4. 5. 6. 7. 8. 9.
Installation 7. A test pattern should appear within a few seconds. 8. Now press the “MENU/ENTER” key (bottom right) to get to the R/T Calibration SETUP page. 9. To enter calibration mode, press the “CALB” menu key. The “CALB” label should turn green and the text near the bottom of the display should read “Calibration Enabled.” 10. From here you may follow the manufacturer’s calibration instructions and procedure or set the roll/trim parameter.
Installation 2.8.10.3.4 Vertical Test - ART 2000 ONLY Press the VERT line item and verify that the antenna scan changes from the horizontal profile to the vertical profile. 2.8.10.3.5 Radar On Mode Checkout WARNING When in ON mode, the radar antenna will be radiating. If the MX20 radar function is not in standby mode, place it in standby mode by pressing the STBY line item. Once in standby, press the ON line item (same key as STBY). The unit is now in “WX” mode.
Installation - Category 5: I/O Discrete ID = 1 - Category 9: Terrain Display Popup ID = 0 The remainder of the KGP560 configuration items is installation-specific and consequently not specified. NOTE The MX20 will automatically range to 10 nmi if a terrain pop-up occurs. NOTE With Terrain Display ID 4 the peaks data will be embedded in the terrain sweep. A future version of the MX20 will support Terrain Display ID 6 and display peaks data outside the terrain sweep area. 2.8.11.
Installation Apollo MX20 Installation Manual 41
Installation NOTES 42 Apollo MX20 Installation Manual
Specifications 3 SPECIFICATIONS This section includes detailed electrical, physical, environmental, and performance specifications for the MX20. 3.1 MX20 FEATURES 3.1.1 DISPLAY 6" Diagonal, Color AMLCD Display 640x480 Resolution (921,600 RGB Dots) 65,535 Simultaneous Colors Direct Sunlight Readable Auto/Manual Dimming 3.1.
Specifications 3.1.6 AVIONICS OUTPUTS Serial Ports ......................................................3 High Speed RS232 1 High Speed RS422 3.1.7 AVIONICS INPUTS Serial Ports ......................................................3 High Speed RS232 1 High Speed RS422 Discrete Inputs.................................................4 General Purpose 3.1.8 AVIONICS OUTPUTS (I/O MODEL) Serial Ports ......................................................2 ARINC 429 High/Low Discrete Outputs..................
Specifications Width...............................................................6.25 inches (15.88 cm) Depth...............................................................8.00 inches (20.3 cm) Table 7 - Unit Weights Unit MX20 only, with GPS MX20 only, without GPS MX20 only, with I/O Option MX20 mounting tray only Weight 4.08 lb. 3.92 lb. 4.07 lb. 0.73 lb. (1.85 kg) (1.78 kg) (1.85 kg) (0.33 kg) 3.1.12 ENVIRONMENTAL SPECIFICATIONS Operating Temperature ...................................
Specifications 3.1.14 INTERNAL GPS RECEIVER PERFORMANCE Number of channels ........................................8 Frequency........................................................1575.42 MHz L1, C/A code Sensitivity (acquisition) ..................................-135 dBm Sensitivity (drop lock) ....................................-142 dBm Dynamic range ................................................> 20 dB Lat/Lon position accuracy...............................
Specifications 3.
Specifications Table 9 - MX20 I/O Connector Pinout (J2) Some features listed are not supported at this time Pin Name I/O Description 1 SYNCHRO_0_X I Reserved 2 SYNCHRO_0_Z I 3 SYNCHRO_0/1_REF_LO I 4 SYNCHRO_1_X I 5 DISCRETE_OUT_0 O Discrete Output number 0 6 DISCRETE_OUT_1 O Discrete Output number 1 7 DISCRETE_OUT_2 O Discrete Output number 2 Reserved 8 DISCRETE_IN_8 I 9 +12V O 10 GND I 11 SHIFT_REG_S/L O 12 561_DATA_IN_B I 13 429_IN_6B I 14 429_IN_5A I 15 429_IN_4A I 16 429_IN_2A I 17 429_OUT_0B O 18 429_O
Specifications 51 52 53 54 55 56 57 58 59 60 61 62 +28V 429_OUT_1A 429_OUT_1B 561_CLK_IN_B 561_CLK_IN_A 561_SYNC_IN_B 561_SYNC_IN_A 429_IN_0B 429_IN_0A 429_IN_3B 429_IN_1A 429_IN_1B I O O I I I I I I I I I ARINC 429 Output port 1A ARINC 429 Output port 1B Reserved ARINC 429 Input port 0B ARINC 429 Input port 0A Reserved View from rear of unit Apollo MX20 Installation Manual 49
Specifications NOTES 50 Apollo MX20 Installation Manual
Troubleshooting 4 TROUBLESHOOTING This section provides information to assist troubleshooting if problems occur after completing the installation. Use Table 10 to assist in troubleshooting. 4.1 TROUBLESHOOTING GUIDE Table 10 - Troubleshooting Guide Problem Cause Solution Unit does not power up – blank screen. 1. 1. 2. 3. 4. Improper wiring; circuit breaker open. Unit intensity turned down. Unit is cold. Data card improperly installed.
Troubleshooting Table 10 - Troubleshooting Guide Problem Unit shows RTE data flag. Unit shows ALT data flag. Cause 5. Position source not configured on appropriate port. 6. External GPS not properly configured. 7. RF interference. External position source does not have active route engaged. 1. Data port configuration incorrect. 2. 1. 2. Invalid altitude supplied to unit. 2. 1. Data port configuration incorrect. 1. 2. SL30 is not powered up. 4. SL30 information is not displayed.
Troubleshooting Table 10 - Troubleshooting Guide Problem Cause Solution enabled in the install pages. Unit posts message indicating Incorrect terrain clearance mode 1. This is normal for special ‘Special’ terrain clearance mode improperly set. ‘Capstone’ support. after power-up. 2. General aviation usage should have the terrain mode set to ‘Normal’ in the install pages. TCAD 1. Unit is not Traffic capable. 1. Ensure that the model MX20 is 2. Data port configuration traffic capable. incorrect. 2.
Troubleshooting Table 10 - Troubleshooting Guide Problem Cause Solution LINK 1. 2. 3. Ensure that the model MX20 is WSI sensor capable. Ensure that the data port configuration is correct and the WSI sensor is set correctly. Ensure that the WSI sensor function is enabled. Ensure that the WSI sensor has power applied and is functional. 5. Verify wiring and pin connections. 1. If an internal fan is present, verify that it is operational and that the opening is clear of obstructions.
Troubleshooting Note that the external GPS may need to acquire and set a destination waypoint before the ALT, POS, and RTE flags clear. 6. If a given external data source causes a system error, verify compatibility and wiring. Re-verify port assignments.
Troubleshooting 4.3 CONTACTING THE FACTORY FOR ASSISTANCE If the MX20 fails to operate despite troubleshooting efforts, contact the UPS Aviation Technologies factory for assistance. UPS Aviation Technologies, Inc. 2345 Turner Rd. SE Salem, Oregon 97302 USA Phone (503) 581-8101 or 1-800-525-6726 http://www.upsat.com Be prepared to offer the following information about the installation: • Installation configuration (accessories, antenna, ...
Periodic Maintenance 5 CONTINUED AIRWORTHINESS INSTRUCTIONS The MX20 is designed to not require any regular maintenance except as included in this section: 5.1 EQUIPMENT CALIBRATION The MX20 design requires no adjustments or calibration to be made. 5.2 CLEANING THE FRONT PANEL The front bezel, keypad, and display can be cleaned with a soft cotton cloth dampened with clean water. DO NOT use any chemical-cleaning agents. Care should be taken to avoid scratching the surface of the display. 5.
Periodic Maintenance NOTES 58 Apollo MX20 Installation Manual
Environmental Qualifications 6 ENVIRONMENTAL QUALIFICATIONS The MX20 has been tested to the following environmental categories per procedures defined in RTCA/DO160D. Environmental Qualification Form Part No: TSO/JTSO No: 430-0270-000 430-0270-500 430-0270-600 C110a C110a C110a C113 C113 C113 C118 C147 430-0270-700 430-0270-800 430-0270-900 C63c/2C63c C110a C63c/2C63c C110a C113 C110a C113 C118 C113 C118 C147 C118 C147 C147 Manufacturer: UPS Aviation Technologies, Inc.
Environmental Qualifications NOTES 60 Apollo MX20 Installation Manual
Environmental Qualifications APPENDIX A – I/O SPECIFICATIONS This appendix includes the RS-232 serial port interface specifications. 6.1 MOVING MAP INPUT The format of the moving map data output is as follows. Definitions of the input data is included in Table 11 and Table 13. A sample output message is included in Figure 21. Baud rate: ............................................... 9600 Data bits: ................................................ 8 Stop bits: .............................................
Environmental Qualifications Table 11 - Moving Map ASCII Navigation Data ID Data Format T ---A----- Length 9 Description s = sign: E for east, W for west ddd = degrees x 10 Warnings: The 4th character will be an “A” when the navigation data is flagged, otherwise, all characters will be dashed. All other navigation data will be dashed when it is flagged. 6.2 BINARY NEAREST LIST DATA (WHEN EXTENDED DATA IS ENABLED ONLY) The nearest waypoints lists are sent one waypoint per data transmission set.
Environmental Qualifications Table 12 - Nearest Waypoint List Data Byte Format 16 Cr Description x = undefined ddddddd = Longitude degrees mmmmmm = Longitude minutes hhhhhhh = Longitude hundredths of minutes ‘\r’ Item Terminator <0x0d> Table 13 - Moving Map Binary Route Data Byte 1 2-3 4 Data Format w dd xiannnnn 5-9 10 11 12 ddddd sddddddd xxmmmmmm xhhhhhhh 13 14 15 16 sxxxxxxx sddddddd xxmmmmmm xhhhhhhh 17 18 nnnnnnnn nnnnnnnn 19 Apollo MX20 Installation Manual Description Item desig
Environmental Qualifications 6.3 FLIGHT PLAN WAYPOINT TYPES (WHEN EXTENDED DATA IS ENABLED ONLY) The following data is only transmitted when preceded by flight plan data. There is one character per flight plan waypoint transmitted.
Environmental Qualifications Example Moving Map Data Output (Extended Data Enabled) AN 34 1570 34°15.70’ latitude BW 118 4390 118°43.90’ longitude C306 306° track angle D210 210 knots E02682 268.2nm to waypoint GR0006 0.6nm right of course I3059 305.9° desired track KSFO SFO waypoint ident L3058 305.8° bearing to waypoint QE140 14.
Environmental Qualifications 6.4 ALTITUDE ENCODER/CONVERTER INPUT The format of the altitude input is as follows. Definition of the input message is included in Table 15. Several sample messages are illustrated in Figure 23Error! Reference source not found.. Baud rate: ...............................................1200 Data bits: ................................................8 Stop bits: ................................................1 Parity: .....................................................
Environmental Qualifications Figure 23 - Altitude Data Input 6.5 STORMSCOPE INPUTS The WX-500 is the only stormscope that the MX20 MFD interfaces with. It can be connected to RS422 or RS-232. RS-232 Connection Cable Voltage Baud Rate Load Impedance RS-422 Connection Cable Voltage Baud Rate Load Impedance TX J3-20 RX J3-8 RS-232_GND J2-5 Twisted shielded triad 24 AWG wire Logic 0 (space) Min: +5V, Max: +15V Logic 1 (mark) Min: -15V, Max: -5V 9600 3KΩ Min.
Environmental Qualifications NOTES 68 Apollo MX20 Installation Manual
