TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 TECHNICAL DESCRIPTION PowerTrunk-T TETRA MBS UNIT.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 DECLARATION OF CONFORMITY Hereby, Teltronic S.A.U. declares that the radio equipment type Mast-mounted Base Station MBS Unit is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available through the technical assistance service at the Internet address: http://www.teltronic.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 PowerTrunk Inc. is the subsidiary of Teltronic S.A.U. responsible for business development, distribution and customer support for Teltronic’s Land Mobile Radio products in North America. The company is headquartered in New Jersey. Teltronic S.A.U. distributes the same products for Land Mobile Radio under different trademarks and brand names in other regions of the world.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 TABLE OF CONTENTS 1. INTRODUCTION 5 2. UNPACKING AND CHECKING 6 3. PREVIOUS CONSIDERATIONS 7 4. INFORMATION ON SAFETY AND ELECTROMAGNETIC COMPATIBILITY 8 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.7.1 4.7.2 GENERAL CONSIDERATIONS ABOUT SAFETY .................................................................................. 8 OPERATION AND EXPOSURE TO RF ENERGY ...................................................................................
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 1. INTRODUCTION The MBS Units are the outdoor modules that make up a Mast Mounted Base Station (MBS). They are independent units that can be interconnected with each other to increase the base station capacity. A MBS consists of a maximum of two MBS Units. The following table displays all the MBS Unit available models, together with their respective frequency band and maximum RF transmitted power.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 2. UNPACKING AND CHECKING The equipment is supplied with all the necessary materials for the installation, either on a mast, on a wall or over the PBS Accessory: MBS Unit includes the followings items One power connector. One Ethernet connector RF super-flexible wire N-Male – N-Male. Brackets for the installation.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 3. PREVIOUS CONSIDERATIONS This manual contains information about instructions for installation, maintenance and use. Read the following pages before using this equipment. It is not advisable to switch on the equipment without having previously connected the antenna otherwise irreparable damage could be. It is important to use an antenna adjusted to the work frequency.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 4. INFORMATION ON SAFETY AND ELECTROMAGNETIC COMPATIBILITY 4.1 GENERAL CONSIDERATIONS ABOUT SAFETY PLEASE READ THESE INSTRUCTIONS CAREFULLY FOR IMPORTANT INFORMATION ABOUT SAFELY OPERATING THIS PRODUCT Most electronic equipment are susceptible to electromagnetic interference if they are not duly protected. If the MBS Unit is placed near unprotected electronic devices, they may malfunction.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 4.2 OPERATION AND EXPOSURE TO RF ENERGY It is the responsibility of the person operating the product to ensure that it is operated safely at all times, and that local laws and regulations governing the usage of Radio Frequency (RF) wireless devices are observed. Obey all signs and instructions relating to the usage to RF wireless devices.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 4.3 IMPORTANT SAFETY NOTES ABOUT THE ANTENNA This radio has been approved by FCC and ISED to operate with the antenna types listed below with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 4.4 ELECTROMAGNETIC COMPATIBILITY REGULATORY INFORMATION (FCC AND ISED) These devices generate, use and radiate RF energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. FCC interference statement and compliance labelling This device complies with Part 15 of the FCC Rules.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 4.5 UL / SAFETY CERTIFICATIONS The MBS Unit is UL certified, and complies with the requirements for electronic devices to minimise risks such as fire, electric shocks or injuries to the operator that may be caused in operation. File number is the following: E318948. MBS Unit complies with the standard UL 60950-1 and UL 60950-22, including the National Differences for United States, Canada and CENELEC (Europe), and it has CB Test Certificate. 4.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 4.7 MECHANICAL AND ENVIRONMENTAL STANDARDS The equipment complies with the following standards: 4.7.1 STANDARDS CENELEC EN 60068-2-1 * No Functional. - 104 ºF. Duration: 72 h * Functional: - 86 ºF. Duration: 16 h. Environmental testing -- Part 2-1: Tests - Test A: Cold EN 60068-2-2 * No Functional. + 185 ºF. Duration: 72 h * Functional: + 140 ºF. Duration: 16 h.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 UNE-EN 60598 * Vibration type: Sine swept * Frequency range: From 10 to 55 Hz * Amplitude (peak): • 10 Hz Amplitude (peak): 0.06 in • 38 Hz Amplitude (peak): 2.04 g • 55 Hz Amplitude (peak): 2.04 g * Number of axes: 3 axes * Swept ratio: 1 Oct./min. * Duration: 30 min./axis Vibration: simulation of the fixing between MBS unit and mast. Eurocode UNE-EN 1991-1-4 Protection for avoiding damages either in the enclosure * Wind speed: 124.27 mi /h (60.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 5. EQUIPMENT DESCRIPTION 5.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 5.2 CONNECTORS 1.- Terminal with the following meaning depending on the MBS Unit Power option: - AC MBS Units: Neutral contact (N). - DC MBS Units: Negative contact (-). 2.- Terminal with the following meaning depending on the MBS Unit Power option: - AC MBS Units: Line contact (L). - DC MBS Units: Positive contact (+). 3.- Power supply Earth contact. 4.- Pressure equalizer. 5.- Chassis Earth contact.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 Note: POWER_IN and POWER_OUT connectors have a coding key to avoid wrong connections; on the following table is showed the location of this coding key depending on the MBS Unit power supply option. External view of power supply panel connector AC Power Supply DC Power Supply Note: The amount of power delivered by both PoE and PoE/ETH connectors to the radio links can not exceed 35 W in total.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 5.3 VISUAL INDICATORS A MBS Unit has a LED indicator that, depending on its state, will indicate the function of the MBS Unit The LEDs show the MBS Unit state: LED STATE en TYPE Tricolor NORMAL STATE Green ON / Orange ON FUNCTIÓN Green On: MBS Unit is operating and transmitting. Green flashing: MBS Unit initializing Red On: There is no link with CNC and no control from any LSC.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 5.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6. INSTALLATION GUIDE The following recommendations must be followed before powering on the MBS Unit module.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.1 NECESSARY EQUIPMENT Make sure you have the necessary equipment depending on the configuration to install. If any of the elements necessary to carry out the installation process described in this manual, were lost or damaged, contact your supplier and / or installer. Necessary equipment Element Code Comments “x” varies depending on band.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 Additional equipment to be considered for installation Element Comments Cable to power the MBS Unit. See features in external power connection section. One power supply cable connector is supplied with the MBS Unit. Ethernet cable to connect PoE See features in Ethernet connection section. One Ethernet cable radio links connector is supplied with the MBS Unit. Antenna coaxial antenna. cable and See features in Antenna connection section.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.2 BASIC PRE-CONFIGURATION Before connecting the MBS Unit to the infrastructure it should have the IP address correctly configured in order to have remote access once it is connected (to set the IP address, see the configuration chapter (F067220PT) in technical manual). Steps: Apply power supply to the MBS through its POWER_IN connector. Wait 3 minutes until the MBS Unit initializes. Connect the PC, to set the IP address, to the ETH connector.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3 INSTALLATION The MBS has been designed to be mounted on both mast/pole, on a wall or over a PBS Accessory. This chapter provides the necessary steps to be followed for a right MBS Unit installation. At least two people are required to carry out the installation of a MBS Unit on a mast/pole. Note: MBS Unit has been designed to operate in vertical position.
TETRA MBS UNIT.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.1 MAST/POLE INSTALLATION 6.3.1.1 MAST/POLE SELECTION The types of section of the mast/pole where the MBS Unit can be mounted are the followings: Circular section: Diameter from 1.18 in to 5.12 in. Square section: From 1.18 in x 1.18 in to 3.35 in x 3.35 in. L section: From 1.18 in x 1.18 in to 4.33 in x 4.33 in.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 Once mounted in its definitive location, if the vandal resistant kit is available, it will prevent the access / disassembly not authorized. In case of installing more than one MBS Unit on the same mast/pole, it is recommended not to mount one above the other one to avoid the heat transfer from the MBS Unit low to the MBS Unit high.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.1.2 MAST/POLE MOUNTING INSTRUCTIONS Steps to install a MBS on a mast/pole: 1. Place the MBS Unit bracket on the mast/pole as follows. Note: Handle the MBS Unit bracket with care if it rests on the floor. underneath to prevent scratches on the surface. Place some protection a) Secure 4 holes clamps on the bracket by tightening the bolts with a 20 Nm torque, using a 0.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 2. Place MBS Unit on the bracket as follows. a) Raise the MBS Unit to the position where the bracket is placed on the mast/pole and hang it on the bracket, tilting slightly to match the bracket guides as indicated in the following figure: To prevent accidents during the MBS installation, for safety it is highly recommended to use a second rope.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 b) Put the bolts of the MBS Unit and washers to the bracket with a 0.67 in wrench and 25 Nm torque. Note: If anti-vandal kit is available (D014000PT), lateral bolts should be placed after mounting the anti-vandal kit. 3. Make the necessary wiring connections as described in the connections section in this guide.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.2 WALL INSTALLATION To install the MBS Unit on a wall, make the following steps: 1. Mark the position of the holes using the bracket as a template itself with the help of a level Note: To ensure proper ventilation there must be at least 27.56 in clearance above and below each MBS Unit. There must also be a minimum distance of 11.81 in free on both sides of the MBS Unit.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 3. Place the bracket over the rawlplug and insert the bolts and washers. Finally screw them with a 0.67 in wrench and 20 Nm torque. 4. Place the MBS Unit on the bracket as follows.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 b) Put the bolts of the MBS Unit and washers to the bracket with a 0.67 in wrench and 25 Nm torque. The order is bolt + grower washer + plain washer. Note: If anti-vandal kit is available (D014000PT), lateral bolts should be placed after mounting the anti-vandal kit. 5. Make the necessary wiring connections as described in the connections section in this guide.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.3 PBS ACCESSORY INSTALLATION The PBS Accessory (D014009) is a hand truck element that allows one person to transport a MBS Unit. PBS Accessory: 1 x PBS Hand Truck 1 x Power Cable 4 x Ethernet Cable 3 x RF Cable The following steps must be done to install a MBS Unit over a PBS Accessory: 1.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 2. Connect the cables on its corresponding ports of the MBS Unit according to the following order: 4 x Ethernet Cables: PoE/ETH, PoE, SYNC OUT and SYNC IN 3 x RF Cables: ANT, DIV OUT and DIV IN 1 x Power Cable: POWER IN Note: The POWER OUT and ETH connectors must be closed with covers. PoE PoE/Eth SYNC OUT SYNC IN DIV OUT DIV IN ANT POWER IN 3.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 4. Put the MBS Unit over the hand truck bracket as indicated below: a) Lift up the MBS Unit until getting the bracket position and lean it softly to reach the anchor guides as shown in the following figure: b) Place the clamping washers and screws in the hand truck bracket with a torque wrench of 0.67 in and torque 25 Nm.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 5. Connect one by one the cables previously fixed in the MBS Unit in the corresponding connectors of the hand truck connector panel. Except the PWR OUT and ETH that will be covered, the rest of cables must have a corresponding connector in the interconnection panel. 6. Verify that all the connections are secured with the panel connector locking system closed and that correctly holds the aerial connector coming from the MBS Unit. 6.3.3.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.3.1.2 VEHICLE TRANSPORT POSITION To perform an vehicle transport of the MBS Unit with the PBS Accessory, the adjustable handle must be placed to the front and the whole set must be inclined to the back using the adjustable handle as support point as shown below: Note: the set composed by MBS Unit and the PBS Accessory has a heavy weight, the actions of loading and unloading into the vehicle must be done by at least two persons. 6.3.3.1.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.4 ANTI-VANDAL KIT INSTALLATION The anti-vandal kit for MBS Unit is an optional accessory (D014000PT). Either the MBS Unit is mounted on a mast/pole or on a wall, the anti-vandal kit, is performed as follows. Take into account that the installation of the ant-vandal kit should be done once you have completed the wiring connections of the MBS Unit.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 - Place the padlock and screw the attachment bolt to the bracket with a 0.67 in wrench and 25 Nm torque. 6.3.5 REQUIREMENTS TO CONSIDER DURING THE ANTENNA INSTALLATION The antennas installation always will depend on TX frequencies assigned to each MBS Units that are part of a MBS. As a general rule, the frequencies assigned to the MBS Units of each MBS shall comply with the following restrictions: Sub-band.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 - Case 1: All MBS Units in the MBS comply with the restrictions about subband and frequency separation. In this case, is allowed to install all the antennas in the same horizontal plane following the guidelines normally applied for SBS sites about the horizontal distance between each antenna and the mast. - Case 2: The restrictions about subband and frequency separation are not complied between the MBS Units in the same MBS.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6 CONNECTIONS This section shows the connections to be made and the characteristics of the material to be used. The MBS Unit is a weather-protected device once the equipment has been installed in its final location; make sure that there is no MBS Unit connector without plug or cable connected. Besides, the external wiring connections of the MBS Unit must be protected from weather, (vulcanizable tape can be used if it is necessary).
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1 SUPPORTED CONFIGURATIONS 6.3.6.1.1 ONE MBS UNIT WITH DIVERSITY 1 IN RECEPTION The connections are the following ones: Power supply 220/110 VAC or 24 VDC. From ANT connector to the antenna. Connection with radio link through PoE or PoE/ETH connector (if the MBS Unit has SNI IP option these connectors are Layer 3). Maintenance through ETH connector (Layer 2).
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.1.1 CONFIGURATION WITH PBS ACCESSORY The connections are the following ones: Power supply 220/110 VAC or 24 VDC. From ANT connector to the antenna. Connection with radio link through PoE or PoE/ETH connector (if the MBS Unit has SNI IP option these connectors are Layer 3).
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.2 ONE MBS UNIT WITH DIVERSITY 2 IN RECEPTION The connections are the following ones: Power supply: 220/110 VAC ó 24 VDC. From ANT connector to the first antenna. From DIV IN connector to the second antenna. Connection with radio link through PoE or PoE/ETH connector (if the MBS Unit has SNI IP option these connectors are Layer 3). Maintenance through ETH connector (Layer 2).
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.2.1 CONFIGURATION WITH PBS ACCESSORY The connections are the following ones: Power supply: 220/110 VAC ó 24 VDC. From ANT connector to the first antenna. From DIV IN connector to the second antenna. Connection with radio link through PoE or PoE/ETH connector (if the MBS Unit has SNI IP option these connectors are Layer 3).
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.3 TWO MBS UNIT (SAME SUBBAND) WITH DIVERSITY 1 OR 2 IN RECEPTION NOTE: Diversity 1 or 2 mode can be selected from the NMS client. The connections are the following ones: Power supply for the MBS Unit 1: 220/110 VAC or 24 VDC. From ANT connector of the MBS Unit 1 to the first antenna. From ANT connector of the MBS Unit 2 to the second antenna.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.3.1 CONFIGURATION WITH PBS ACCESSORY NOTE: Diversity 1 or 2 mode can be selected from the NMS client. The connections are the following ones: Power supply for the PBS Accessories 1 and 2: 220/110 VAC or 24 VDC. From ANT connector of the PBS Accessory 1 to the first antenna. From ANT connector of the PBS Accessory 2 to the second antenna. Connection with radio link through PoE connector.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.4 TWO MBS UNITS (DIFFERENT SUBBANDS) WITH DIVERSITY 1 IN RECEPTION The connections are the following ones: Power supply for the MBS Unit 1: 220/110 VAC or 24 VDC. From ANT connector of the MBS Unit 1 to the antenna 1. From ANT connector of the MBS Unit 2 to the antenna 2. Connection with radio link through PoE connector (if the MBS Unit has SNI IP option this connector is Layer 3).
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.4.1 CONFIGURATION WITH PBS ACCESSORY The connections are the following ones: Power supply for the PBS Accessories 1 and 2: 220/110 VAC or 24 VDC. From ANT connector of the PBS Accessory 1 to the antenna 1. From ANT connector of the PBS Accessory 2 to the antenna 2. Connection with radio link through PoE connector (if the MBS Unit has SNI IP option this connector is Layer 3). Maintenance through PoE connector.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.5 TWO MBS UNITS (DIFFERENT SUBBANDS) WITH DIVERSITY 2 IN RECEPTION The connections are the following ones: Power supply for the MBS Unit 1: 220/110 VAC or 24 VDC. From ANT connector of the MBS Unit 1 to the antenna 1. From DIV IN connector of the MBS Unit 1 to the antenna 2. From ANT connector of the MBS Unit 2 to the antenna 3. From DIV IN connector of the MBS Unit 2 to the antenna 4.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.1.5.1 CONFIGURATION WITH PBS ACCESSORY The connections are the following ones: Power supply for the PBS Accessories 1 and 2: 220/110 VAC or 24 VDC. From ANT connector of the PBS Accessory 1 to the antenna 1. From DIV IN connector of the PBS Accessory 1 to the antenna 2. From ANT connector of the PBS Accessory 2 to the antenna 3. From DIV IN connector of the PBS Accessory 2 to the antenna 4.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.2 CONNECTION OF THE EXTERNAL POWER SUPPLY Check that the power supply source and/or the battery to be used are adapted to the type of MBS Unit (AC/DC) and meets the voltage and current requirements necessary to supply the equipment. MBS Unit with AC power supply source: - Nominal voltage: 110/220 VAC (Range: from 94 to 264 VAC). - Use the power cable connector provided with the MBS Unit to connect the MBS Unit to the power supply source.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 o Push the insert back into the hood/housing. o Fix the assembly tightening the top locking screw and tightening the cable gland nut on the back of the hood/housing. MBS Unit with DC power supply source: - Nominal voltage: 24 VDC (Range: from 21.6 to 31.2 VDC). - Use the power cable connector provided with the MBS Unit to connect the MBS Unit to the power supply source.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 o Push the cable through the cable gland and the hood/housing and insert the wires into the insert respecting the correct polarity. Earth (PE) Negative (-) Positive (+) o Fix each wire tightening each pin from the front side with a hexagonal screwdriver (Allen number 2). o Push the insert back into the hood/housing. o Fix the assembly tightening the top locking screw and tightening the cable gland nut on the back of the hood/housing.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 In both cases: The power supply cable to the MBS Unit must be provided by the installer with the proper power supply connector adapted for the connection to the electrical network or to a 24 VDC source. Ensure that the earth connection is made before equipment’s start-up. The MBS Unit has an earth connector; this connector will connect to the earth protection of the installation, which is different to the earth protection of the lightning rod.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.6.4 EXTERNAL ETHERNET CONNECTION The Ethernet cable connector, to connect the MBS Unit with the radio link (PoE), is supplied with every MBS Unit. Note: In the case of connection to two radio links, it is recommended to contact your supplier and/or installer who will provide the additional Ethernet cable connector.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.7 CONNECTING / DISCONNECTING THE MBS AC MAINS SUPPLY The electrical supply to the MBS is connected through a connector with a three-wire cable. This cable shall be connected to the electrical supply network, which must comply with the standards and/or regulations of the country in which the MBS is installed. The connection of the MBS to the electrical installation must be carried out by specialised personnel.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 6.3.8 CONNECTING / DISCONNECTING THE MBS FROM THE DC SUPPLY The electrical supply to the MBS is connected through a connector with a three-wire cable. This cable shall be connected to the 24 VDC supply, which must comply with the regulations of the country in which the MBS is installed. The connection of the MBS to the supply must be carried out by specialised personnel. The maximum current required by the MBS is 9 A.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 7. START UP/CONFIGURATION/VERIFICATION IMPORTANT: Ensure that the power supply of the MBS Unit is the proper one before switch it on; an erroneous power supply can cause damages in the equipment. Every MBS Unit has in its labelling the diverse options that it offers.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 8. INCIDENTS The MBS Unit must be repaired by authorized technical personnel only. There will not be performed any repair of the MBS Unit and it will have to be sent to factory except for the change of the pressure equalizer or the overvoltage protections. 8.1 INTERFERENCE AT MBS UNIT This alarm is monitored in the NMS management and configuration module. See the infrastructure Event List in the NMS Client Help contents.
TETRA MBS UNIT. INSTALLATION GUIDE F067646PT_2801 8.2 OVER VOLTAGE PROTECTION MBS Unit has several protections against lightning and surges, in any case the action of these protections generate an alarm in the NMS client which disappear when the protective element is replaced by authorized technical staff. Protection against lightning and power surges This protection is located within the MBS Unit. It should be changed every time it breaks even if the MBS Unit continues functioning properly.