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Comtech EF Data CRS-280 Installation And Operation Manual Download Page 41

 

CRS-280/280-L IF Switch for 1:N Redundancy 

 

Revision - 

 

Cables and Connections 

4–1 

MN-CRS-280/280L 

Chapter 4. CABLES 

AND

 

CONNECTIONS 

4.1 

Overview 

 

Chapter 2. INSTALLATION 
Appendix A. CABLE DRAWINGS 

When assembling a Comtech EF Data 1:N Redundancy System, in addition to purchasing the 
desired modem group (one Redundant modem, up to 10 Traffic modems) and the appropriate 
companion switch (i.e., CRS-300, CRS-500 etc.), the user is also required to purchase all cables 
and components required for interconnection of the redundant configuration to various interfaces 
(i.e., control, IF, and data). 

Once the CRS-280/280L switch, its companion redundancy switch, and all modems have been 
mounted as outlined in 

Chapter 2. INSTALLATION

, the user must properly attach all required 

cabling, then configure the system for correct operation. 

For the purpose of clarity, this chapter deals only with the connections needed for the 
CRS-280/280L’s application 

within

 a configured 1:N Redundancy System. Refer to the applicable 

companion switch 

Installation and Operation Manual

 for pertinent data interface cabling and other 

cable connection information.  

The sections that follow in this chapter provide specific interface examples that identify the 
individual redundancy cable(s) required to interconnect the two interfaces. For line drawings of the 
cables specified in this chapter, see 

Appendix A. CABLE DRAWINGS

. 

 

Leave the switch and all modems powered off until all connections are ready. 

Summary of Contents for CRS-280

Page 1: ...1 N Redundancy Installation and Operation Manual Part Number MN CRS 280 280L Revision IMPORTANT NOTE The information contained in this document supersedes all previously published information regarding this product Product specifications are subject to change without prior notice ...

Page 2: ...L Copyright 2018 Comtech EF Data All rights reserved Printed in the USA Comtech EF Data 2114 West 7th Street Tempe Arizona 85281 USA 480 333 2200 FAX 480 333 2161 Revision History Rev Date Description 2 2018 Initial Release Note This manual supersedes MN CRS280L IOM ...

Page 3: ...mmunications Commission FCC v International Symbols v EMC Electromagnetic Compatibility v EN55022 1997 Compliance v EN55024 1998 Compliance v Product Support vi Comtech EF Data Headquarters vi Warranty Policy vii Limitations of Warranty vii Exclusive Remedies viii CHAPTER 1 INTRODUCTION 1 1 1 1 Overview 1 1 1 1 1 Compatibility 1 3 1 2 Physical Description 1 4 1 2 1 Front Panel 1 4 1 2 2 Rear Panel...

Page 4: ...able Connection 4 3 4 2 3 CRS 300 1 N Redundancy Switch Control Cable Connection 4 3 4 2 4 CRS 500 M N Redundancy System Control Cable Connection 4 4 4 3 Cable Connections 4 11 4 3 1 CRS 280 IF Cable Connections 4 11 4 3 2 CRS 280L L Band IF Cable Connections 4 11 4 3 3 L Band IF Cable Characteristics 4 11 4 3 4 L Band Switch to Modem Cabling Requirements 4 11 4 3 5 L Band Uplink Downlink Cable Co...

Page 5: ...link Output 1 13 Figure 3 1 CRS 280 Connectors 3 2 Figure 3 2 CRS 280L Connectors 3 4 Figure 4 1 SMS 7000 to CRS 280L Control Cable Connection 4 5 Figure 4 2 CRS 400 to CRS 280L Control Cable Connection 4 6 Figure 4 3 CRS 300 to CRS 280 Control Cable Connection 4 7 Figure 4 4 CRS 300 to CRS 280L Control Cable Connection 4 8 Figure 4 5 CRS 500 to CRS 280 Control Cable Connection 4 9 Figure 4 6 CRS ...

Page 6: ...Switch for 1 N Redundancy Revision Table of Contents TOC 4 MN CRS 280 280L Acronym List Acronym Description AC Alternating Current CSU Control Switch Unit DC Direct Current ISU IF Switch Unit LED Light Emitting Diode ...

Page 7: ...thereof are not guaranteed or warranted and they are not intended to be nor should they be understood to be representations or warranties concerning the products described Further Comtech EF Data reserves the right to make changes in the specifications of the products described in this manual at any time without notice and without obligation to notify any person of such changes This is an informat...

Page 8: ... all trademarks are the property of the trademark owners Warnings Cautions and Notes A WARNING gives information about a possible hazard that MAY CAUSE DEATH or SERIOUS INJURY A CAUTION gives information about a possible hazard that MAY CAUSE INJURY or PROPERTY DAMAGE A NOTE gives important information about a task or the equipment A REFERENCE directs the user to additional information about a tas...

Page 9: ...xposure of personnel to hazards For further information contact the Comtech EF Data Customer Support Department The persons responsible for the operation and maintenance of the equipment must Know how to work around with and on high voltage equipment Exercise every precaution to ensure personnel safety Exercise extreme care when working near high voltages Be familiar with the warnings presented in...

Page 10: ...ltitudes non pressurized greater than 2000 meters excessive dust or vibration flammable gases corrosive or explosive atmospheres Operation in vehicles or other transportable installations that are equipped to provide a stable environment is permitted If such vehicles do not provide a stable environment safety of the equipment to EN60950 may not be guaranteed Installation The installation and conne...

Page 11: ...rdance with the instruction manual it may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case users are required to correct the interference at their own expense International Symbols International Symbols Symbol Definition Symbol Definition Alternating Current Protective Earth Fuse Chassis Groun...

Page 12: ... a continuous outer shield either foil or braid or both must be used and the shield must be bonded to the back shell The equipment must be operated with both AC module panels assembled firmly to the rear of the chassis at all times If it becomes necessary to remove either AC module the user should ensure that the cover is correctly re fitted before normal operation commences Product Support For al...

Page 13: ... of the repaired or replaced parts Limitations of Warranty The warranty does not apply to any part of a product that has been installed altered repaired or misused in any way that in the opinion of Comtech EF Data Corporation would affect the reliability or detracts from the performance of any part of the product or is damaged as the result of use in a way or with equipment that had not been previ...

Page 14: ...ata Corporation s products the aforementioned warranty and shall indemnify and hold harmless Comtech EF Data Corporation from any claims or liability of such purchaser lessee or user based upon allegations that the buyer its agents or employees have made additional warranties or representations as to product preference or use The remedies provided herein are the buyer s sole and exclusive remedies...

Page 15: ...Switch for 1 N Redundancy Revision Introduction 1 1 MN CRS 280 280L Chapter 1 INTRODUCTION 1 1 Overview Figure 1 1 CRS 280 70 140 MHz IF Switch for 1 N Redundancy Figure 1 2 CRS 280L L Band IF Switch for 1 N Redundancy ...

Page 16: ... up to 10 Traffic Modems prime channels Operation of the CRS 280L is controlled by the switching system to which it is connected The CRS 280L L Band Switch is necessary when one or more modems within the redundancy system connect to the other polarization of the antenna or to multiple antennas The CRS 280 280L is designed for use with the following Comtech EF Data products Table 1 1 IF Switch Comp...

Page 17: ...hows the system level block diagram for a CRS 280L system Figure 1 3 1 10 Redundancy w CRS 280L System level Block Diagram 1 1 1 Compatibility The Comtech EF Data CRS 280 280L IF Switch is designed specifically as an accessory product for Comtech EF Data equipment It is not designed to operate with any other manufacturer s equipment The CRS 280L is not designed to convey Direct Current DC power to...

Page 18: ...U high rack mounting chassis that can be freestanding if desired Rack handles are not supplied The CRS 280L is constructed as a 4RU high rack mounting chassis that can be freestanding if desired It is provided with rack handles at the front for easy removal from and placement into a rack 1 2 1 Front Panel Figure 1 4 CRS 280 Front Panel Figure 1 5 CRS 280L Front Panel 1 10 Configuration shown ...

Page 19: ... Switch for 1 N Redundancy Revision Introduction 1 5 MN CRS 280 280L 1 2 2 Rear Panel Figure 1 6 CRS 280 Rear Panel Figure 1 7 CRS 280L Rear Panel Power Supply Ground Power Supply Control Interfaces Control Interface ...

Page 20: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Introduction 1 6 MN CRS 280 280L 1 2 3 Dimensional Envelope Figure 1 8 CRS 280 70 140 MHz IF Switch Dimensional Envelope ...

Page 21: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Introduction 1 7 MN CRS 280 280L 17 00 43 18 13 18 33 48 13 92 35 36 6 96 17 68 19 00 48 26 Figure 1 9 CRS 280L L Band IF Switch Dimensional Envelope ...

Page 22: ...n used with CRS 300 CDM 625 625A when used with CRS 300 or CRS 500 SLM 5650A when used with CRS 300 or CRS 500 Tx Rx Operating Frequency 50 to 180 MHz 950 to 2150 MHz IF Impedance 50Ω and 75Ω 50Ω TX Return Loss 18 dB return loss into 75Ω 50Ω optional 12 dB return loss into 50Ω TX to TX Channel Isolation 50 dB 70 dB RX to RX Channel Isolation 50 dB 70 dB TX to RX Channel Isolation 60 dB 90 dB Tx IF...

Page 23: ...VAC Power Loss Failsafe N A All uplinks downlinks revert to associated L Band inputs outputs Environmental Operating Temperature 32 to 122 F 0 to 50 C 32 to 122 F 0 to 50 C Storage Temperature 58 to 212 F 50 to 100 C 58 to 212 F 50 to 100 C Humidity 95 at 122 F 50 C Non condensing 95 at 122 F 50 C Non condensing Dimensions 19 48 26 cm wide x 2 5 6 35 cm deep x 7 17 78 cm high 19 48 26 cm wide x 14...

Page 24: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Introduction 1 10 MN CRS 280 280L 1 3 1 CRS 280L Typical Insertion Loss Graphs Figure 1 10 Graph 1 Downlink Input to Rx Output ...

Page 25: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Introduction 1 11 MN CRS 280 280L Figure 1 11 Graph 2 Downlink Input to Backup Rx Output ...

Page 26: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Introduction 1 12 MN CRS 280 280L Figure 1 12 Graph 3 Backup Input to Selected Uplink Output ...

Page 27: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Introduction 1 13 MN CRS 280 280L Figure 1 13 Graph 4 Tx Input to Associated Uplink Output ...

Page 28: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Introduction 1 14 MN CRS 280 280L Notes ...

Page 29: ...ect shipping containers for damage 2 If shipping containers are damaged keep them until the contents of the shipment have been carefully inspected and checked for normal operation 3 Remove the packing list from the outside of the shipping carton 4 Open the carton and remove the contents 5 Check the contents against the packing list to verify completeness of the shipment 6 If damage is evident cont...

Page 30: ...0 1 10 Redundancy Switch CRS 500 M N Redundancy System or CEFD legacy product CRS 400 and IFU CEFD legacy product SMS 7000 for L Band applications The CRS 280L is constructed as a 4RU high rack mounting chassis Rack handles at the front of the unit facilitate removal from and placement into a rack It is compatible with mounting at the top back or front of the rack refer to the associated controlle...

Page 31: ...280L Chapter 3 CONNECTOR PINOUTS 3 1 Connector Overview Chapter 4 CABLES AND CONNECTIONS See Chapter 4 CABLES AND CONNECTIONS for complete details on IF cabling between the CRS 280 280L and its companion redundant switches redundant and traffic modems and uplink and downlink equipment ...

Page 32: ...0 Connectors The front and rear panels of the CRS 280 IF Switch are shown in Figure 3 1 The front panel connectors provide all necessary connections to connect all equipment internal and external to the 1 N redundancy setup The rear panel connector of the CRS 280 provides the control connector between the CRS 280 and its companion redundancy switch e g CRS 300 CRS 500 etc ...

Page 33: ...ndant Modem Tx Traffic 1 10 Up Converter Tx from Traffic Modem Receive IF BNC female 70 140 Output Rx Backup Rx to Redundant Modem Rx Traffic 1 10 Down Converter Rx to Traffic Modem Rear Panel Control Interface J1 CRS Control Interface 25 pin Type D female Control interface for CRS 400 CRS 300 CRS 500 Redundancy Switching products Indicates a Comtech EF Data legacy product that is no longer in pro...

Page 34: ...CRS 280L Connectors The front and rear panels of the CRS 280L L Band IF Switch are shown in Figure 3 2 The front panel connectors provide all necessary connections to connect all equipment internal and external to the 1 N redundancy setup The rear panel connectors of the CRS 280L provide the control connectors between the CRS 280L and its companion redundancy switch e g CRS 300 CRS 500 etc ...

Page 35: ...Control Interface J1 CRS Control Interface 25 pin Type D female Control interface for CRS 400 CRS 300 CRS 500 Redundancy Switching products J2 SMS Control Interface 15 pin Type D male Control interface for SMS 7000 Redudancy Switching Product Power Ground AC Input 2X IEC p o Primary and Backup AC Power Supply Modules CEFD P N PL 10207 1 DC Input 2X 3 screw Terminal Block p o Optional Primary and B...

Page 36: ...ntrol Interface connector is used to connect the CRS 280L to the IF Switch Control port located on the CRS 230 Controller card installed in the CRS 400 1 8 Redundancy Switch or CRS 300 1 10 Redundancy Switch or to the P1 IF Switch Control port located on the control interface side of the CRS 500 M N Redundancy System s Data Switch Unit DSU The Comtech EF Data CRS 400 1 8 Redundancy Switch is a leg...

Page 37: ...y Switch is a legacy product that is no longer in production The J1 CRS Control Interface connector communicates with the logic interface of the companion redundancy switch to drive the currently selected terrestrial modem and to decide whether the system is in bridged or backup mode The CRS 280L performs the same bridging and backing up functions of the Tx and Rx IF signals to match what the comp...

Page 38: ...t DC Power Connectors optional Two DC power supplies one primary one backup are optionally available For each a standard 3 screw terminal block with fuse holder supplies the Direct Current DC power to the CRS 280L Observe the following Standard AC Power Specifications Input Power 25W typical Input Voltage 100 240 volts AC 6 10 autosensing total absolute max range is 90 264 volts AC Connector Type ...

Page 39: ...onnector Pinouts 3 9 MN CRS 280 280L 3 3 2 4 Ground Connector The AC power connector provides the safety ground A 10 32 stud located to the lower left hand side of the CRS 280L rear panel is provided for connecting a common chassis ground among equipment ...

Page 40: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Connector Pinouts 3 10 MN CRS 280 280L BLANK PAGE ...

Page 41: ...ancy switch and all modems have been mounted as outlined in Chapter 2 INSTALLATION the user must properly attach all required cabling then configure the system for correct operation For the purpose of clarity this chapter deals only with the connections needed for the CRS 280 280L s application within a configured 1 N Redundancy System Refer to the applicable companion switch Installation and Oper...

Page 42: ...nd the redundancy switch ensure that screw locks on the D type connectors are securely fastened This will prevent the accidental unmating of the cable particularly when a standby unit is being removed or replaced 2 Only one control interface must be used Do not make connections to both control interfaces on the CRS 280L The CRS 280L automatically detects the control interface in use and cannot fun...

Page 43: ...tech EF Data CRS 400 1 8 Redundancy Switch is a legacy product that is no longer in production As shown in Figure 4 2 Step Instructions 1 Connect the DB 25M connector of the CA WR0066 control cable to the DB 25F J1 CRS Control Interface port on the rear panel of the CRS 280L 2 Connect the other end of the control cable to the DB 25M IF Switch Control port on the CRS 230 Controller card installed i...

Page 44: ... the rear panel of the CRS 280 280L 2 Connect the final DB 9F connector on the CA 0021666 Control Cable to the DB 9M P1 IF Switch Control port on the control interface side of the CRS 500 M N Redundancy System s Data Switch Unit DSU Note The CRS 500 DSU is in turn connected to the CRS 500 Control Switch Unit CSU via the CA 0000234 Control Cable see the CRS 500 M N Redundancy System Installation an...

Page 45: ... N Redundancy Revision Cables and Connections 4 5 MN CRS 280 280L Figure 4 1 SMS 7000 to CRS 280L Control Cable Connection The Comtech EF Data SMS 7000 1 8 Modem Protection Switch is a legacy product that is no longer in production ...

Page 46: ...or 1 N Redundancy Revision Cables and Connections 4 6 MN CRS 280 280L Figure 4 2 CRS 400 to CRS 280L Control Cable Connection The Comtech EF Data CRS 400 1 8 Redundancy Switch is a legacy product that is no longer in production ...

Page 47: ...CRS 280 280 L IF Switch for 1 N Redundancy Revision Cables and Connections 4 7 MN CRS 280 280L Figure 4 3 CRS 300 to CRS 280 Control Cable Connection ...

Page 48: ...CRS 280 280 L IF Switch for 1 N Redundancy Revision Cables and Connections 4 8 MN CRS 280 280L Figure 4 4 CRS 300 to CRS 280L Control Cable Connection ...

Page 49: ...CRS 280 280 L IF Switch for 1 N Redundancy Revision Cables and Connections 4 9 MN CRS 280 280L Figure 4 5 CRS 500 to CRS 280 Control Cable Connection ...

Page 50: ...CRS 280 280 L IF Switch for 1 N Redundancy Revision Cables and Connections 4 10 MN CRS 280 280L Figure 4 6 CRS 500 to CRS 280L Control Cable Connection ...

Page 51: ... N male to Type N male connectors 4 CA RF10453 6 Cable Assembly L Band 50Ω Type N male to Type N male connectors 6 CA RF10453 8 Cable Assembly L Band 50Ω Type N male to Type N male connectors 8 4 3 3 L Band IF Cable Characteristics If L Band cables are not purchased from Comtech EF Data use of a suitable equivalent is recommended Cable Type Loss at 1 GHz Loss at 2 GHz Semflex BPE200 or equivalent ...

Page 52: ...rime Modem 7 TX Output TX 7 TX In RX Input RX 7 RX Out Prime Modem 8 TX Output TX 8 TX In RX Input RX 8 RX Out Prime Modem 9 TX Output TX 9 TX In RX Input RX 9 RX Out Prime Modem 10 TX Output TX 10 TX In RX Input RX 10 RX Out 4 3 5 L Band Uplink Downlink Cable Connections The CRS 280L is not designed to convey DCpower to external equipment such as LNBs or BUCs Do not apply DC power to the L Band i...

Page 53: ...spective modem and companion switch Installation and Operation Manuals Third once the modems have been properly configured for 1 N redundant operations the user should follow the instructions in the next two chapter sections in the sequence they are presented 5 2 CRS 280L Input Power Cord Connections Do not turn the CRS 280L power supply switches to the on position until all system connections are...

Page 54: ... on position Once the power supplies are turned on both power status LEDs A and B on the front panel should illuminate green 3 Power up the companion switch as applicable e g turn on the system controller data switch for the CRS 300 CRS 400 or SMS 7000 turn on the CRS 500 Control Switch Unit CSU etc The CRS 280L is designed to operate with only one power supply energized However it is recommended ...

Page 55: ...anel J1 CRS Control Interface or J2 SMS Control Interface connector to its companion redundancy switch IF Switch Control Interface connector The IF Interface Cables may be selected and used to connect the CRS 280L via the front panel Tx Rx Type N threaded female connectors to the Redundant Modem and up to 10 traffic modems that are part of the 1 N redundancy setup as well as to any external uplink...

Page 56: ... 1 Control Cable DB 15F DB 15M 8 CRS 280L SMS 7000 Data Switch Unit DSU A 2 4 2 4 3 CA WR0066 Control Data Cable DB 25F DB 25M 6 CRS 280L CRS 400 CRS 300 A 3 4 4 CA 0021666 Control Cable DB 25M DB 9F 8 CRS 280 280L CRS 500 Data Switch Unit DSU The Comtech EF Data SMS 7000 1 8 Modem Protection Switch and CRS 400 1 8 Redundancy Switch are legacy products that are no longer in production ...

Page 57: ... Appendix A A 3 MN CRS 280 280L A 2 1 SMS 7000 Control Cable The Comtech EF Data SMS 7000 1 8 Modem Protection Switch is a legacy product that is no longer in production Figure A 1 CRS 280L SMS 7000 Data Switch Unit DSU Control Cable CEFD P N CA 5343 1 ...

Page 58: ...evision Appendix A A 4 MN CRS 280 280L A 2 2 CRS 400 CRS 300 Control Cable The Comtech EF Data CRS 400 1 8 Redundancy Switch is a legacy product that is no longer in production Figure A 2 CRS 280L CRS 400 CRS 300 Control Cable CEFD P N CA WR0066 ...

Page 59: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Appendix A A 5 MN CRS 280 280L A 2 3 CRS 500 Control Cable Figure A 3 CRS 280 280L CRS 500 Data Switch Unit DSU Control Cable CEFD P N CA 0021666 ...

Page 60: ...y Revision Appendix A A 6 MN CRS 280 280L A 3 IF Interface Cable Type N 50Ω Figure A 4 Type N 50Ω IF Coax Cable CEFD P N CA RF10453 x CEFD P N DIM A CA RF10453 2 24 00 80 CA RF10453 4 48 00 1 50 CA RF10453 6 72 00 3 00 CA RF10453 8 96 00 3 00 ...

Page 61: ...the only field replaceable components in the CRS 280L This appendix illustrates the procedure required to remove and install a CRS 280L power supply module Figure B 1 into any CRS 280L L Band IF Switch unit Unless otherwise noted while the illustrations throughout this appendix visually depict the replacement of a standard PL 10207 1 AC Power Supply Module this procedure is typical for removing an...

Page 62: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Appendix B B 2 MN CRS 280 280L Power Supply Power Supply Figure B 1 CRS 280L Rear Panel shown with PL 10207 1 AC Modules ...

Page 63: ...he AC power switch on both power supply modules and disconnect both power cords from their receptacles For DC Units Make sure to disconnect both power cords from their DC power sources then unscrew the positive negative and ground leads from the terminal block of the module being replaced 2 Loosen the four captive mounting screws of the module to be replaced then carefully pull the module plate aw...

Page 64: ...1 N Redundancy Revision Appendix B B 4 MN CRS 280 280L Step Task 3 Carefully remove the Power Supply Cable from its mating connector on the old power supply module PCB then set the old power supply module aside Power Supply Cable ...

Page 65: ... Revision Appendix B B 5 MN CRS 280 280L B 3 Power Supply Module Installation Procedure Step Task 1 Identify for assembly the Power Supply Cable connected to the CRS 280L chassis PCB and its mating connector on the new power supply module PCB ...

Page 66: ...he Power Supply Cable to its mating connector on the new power supply module PCB 3 Assemble the power supply module plate to the CRS 280L chassis taking care not to crimp the Power Supply Cable when doing so then tighten the four captive mounting screws of the module to secure the module in place Power Supply Cable ...

Page 67: ...modules once all control and IF cabling connections have been confirmed For DC Units Screw on the positive negative and ground leads to the terminal block of the replacement power supply module The unit may be reconnected to both DC power sources once all control and IF cabling connections have been confirmed The module installation has been completed and the CRS 280L L Band Switch for 1 N Redunda...

Page 68: ...CRS 280 280L IF Switch for 1 N Redundancy Revision Appendix B B 8 MN CRS 280 280L BLANK PAGE ...

Page 69: ......

Page 70: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX ...

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