Nexus Router / Repeater Installation Manual
Contents
1. Connector Configurations Terminator Off Off Shield Looped Twisted Earthed Earthed Data Cable Twisted Looped End End Figure 4 Cable Connection and Terminator On Off Setting Copyright 2013 Thomas amp Betts Australasia ABN 062 074 810 898 Rev 2 0 19April 2013 2 Complete Solutions in Emergency Lighting STANILITE The function of the cable shield is to reduce pick up of electrostatic noise If the shield is not correctly connected it can pick up more noise than if the shield was not there at all The shield must be electrically continuous throughout the length of the channel and be connected to earth at one point only ie at a router or repeater Connection at more than one point will create a ground loop in the shield which can pick up noise NETWORK TOPOLOGY Figure 5 is an example showing how the NUN computer routers repeaters and SPU nodes are connected together to form a Nexus network The topology used is a doubly terminated multi drop bus structure The trunk is designated channel number 1 The PC NUN and all routers are connected to the trunk By convention data port B of each router is used to connect to the trunk Data port A is used for the branch channel for each router 62 SoS Efa 5 a w w S56 Q 5 D D gg O DO z ow f I 3f a fo fo oa TL Ly 35 Saj jot i 1 a we cS e Bc heas Els l gs E i a O Je ie He I Router 4 Data2. m of Data por a x T4 Branch Line Channel 4 g s 3 o D c 5 BE gc os He aia Ee Te lj S oh a eg 3 Ural x El FATER Z A39 5 Se 5 5 6 u 9 28 83 l z s 238 gt fee 5 e 2 38 32 2 2 B e c E E E E g 2 ss Pees I oa 2 8 Oo oO S ssee 3 z E S as 2 gt d a kjg lis Lyx xx E ss a oa ot Sc fe a ja oO Re eo SE 3 x c 6 i q te Dom gl E x g5 g 35 a SC Om Be i35 S BE gt 8 5 5 zo as 52 SE Nn A Fu 2 Wow 1 ol E Figure 5 Sample Diagram of Nexus Multi drop Topology Network Copyright 2013 Thomas amp Betts Australasia ABN 062 074 810 898 Rev 2 0 19April2013 3
3. 2 20937 Power supply for Nexus router 9VDC 1Amp 16 10187 Plug 3 way with stain reliet 26 NRMD003 02 06070P Mounting plate metal for mounting 5 routers If you have any difficulty or questions contact Thomas amp Betts Service in Australia on 1300 666 595 Monday to Friday 8 30am to 4 30pm AEST and ask for help Our trained service personnel will usually be able to take your call immediately and assist you in resolving your difficulty Thomas amp Betts is committed to providing valuable Through Life Support for its products 32 20938 Jumper lead 300mm length to connect extra router up tp 5 routers can be connected with one power supply Copyright 2013 Thomas amp Betts Australasia ABN 062 074 810 898 Rev 2 0 19April2013 4 Complete Solutions in Emergency Lighting STANILITE Doc No 29 01029 Thomas Betts A Member of the ABB Group Thomas amp Betts Australasia ABN 062 074 810 898 Head Office Unit D3 3 29 Birnie Avenue Lidcombe NSW 2141 Australia Manufacturing 23a Nyrang Street Lidcombe NSW 2141 Australia Telephone 61 1300 666 595 Facsimile 61 1300 666 594 Nexus Router Repeater Installation Manual GREETINGS This document is designed to assist you during the installation of the product The Nexus Router Repeater is designed to be installed quickly and easily however Thomas amp Betts recommends that you read this document thoroughly before commencing installation Correct installation o
4. STANILITE Complete Solutions in Emergency Lighting TERMINATORS Every correctly wired channel or channel section can be viewed as a continuous length of data cable with nodes distributed along its length The two ends of every channel must each have a terminator connected to it Routers have an in built terminator fitted to each data port that can be switched on or off as appropriate It is often the case that a channel starts or finishes at a router or repeater In this case the in built terminator for that port should be switched on When a channel starts or finishes at any other type of node then an external terminator should be connected at this point Refer to Figure 5 for an illustration of this If more than two terminators are connected to a channel then the signals will be excessively attenuated which may result in loss of data POWER CONNECTION Each unit is supplied with a 240VAC 3 pin input 9VDC output plug pack power supply The negative output terminal is connected to the mains earth pin The DC power plug should be connected to the power socket marked as loop in When a number of routers are installed in the one spot they can be supplied from the one power supply Up to 5 routers can be supplied in this way Use the power jumper lead supplied with each router to connect loop out to loop in for successive routers CATALOGUE NUMBERS 02 NRAS001 Nexus router assembly 78Kbps twisted pair network to 78Kbps twister pair network 3
5. f this device is essential for the operation of the Nexus System This device has been manufactured to provide trouble free operation for many years when treated with due care There are no user serviceable parts inside Please return to Thomas amp Betts for service DEFINITIONS Channel A section of level 4 or better 22 AWG shielded twisted pair data communication cable used as the physical transport medium for packets of data Limited to no longer than 1 km terminated at both ends with terminators and with a maximum of 60 nodes connected to it More than that will overload the channel and degrade signal performance Thomas amp Betts recommends only 50 SPU s per channel to allow for future expansion to the installation Note that when a router or repeater is connected to a channel that counts as 1 node Trunk A channel that forms the backbone of the data cable network Router A router connects a branch channel to the main trunk and selectively transfers data between them Repeater A repeater connects two sections of a channel together It transfers data from one section of the channel to the other and boosts the signal strength in the process A repeater is used to extend the length of a channel beyond the normal limit of the particular cable used A repeater is physically identical to a router the only difference is the configuration settings which is set by an external computer running the Nexus software Nexus Router Repeater
6. mber here during commissioning 230 0 Test of network B Service one glerminator Tist Channel Tick appropriate box during commissioning of network oRouter je 134 0 __ORepeater Data REN Power B 9V 100MA DC No 32 20937 Router Trunk In caro Out Loop cals Repeater Channel In annel Out In Figure 1 Figure 2 Figure 3 DATA CABLE CONNECTION Years of experience have shown that any problems encountered with the operation of a Nexus system are virtually always caused by incorrect wiring of the data cable network resulting in poor communications The most common causes of problems include Wrong data cable type Wrong wiring topology eg a T or star connection made at a node Incorrect use of terminators Incorrect connection of cable shields Intermittent joins due to loose connections Intermittent joins due to over tightened damaged connections Data cable proximity to electromagnetic noise sources The basic wiring rule for connecting routers and nodes to the twisted pair data cable is that they are all wired in parallel across the pair The connection is polarity insensitive The data connection to the router is made using a 3 way connector plug for each data port The centre pin in each corresponding socket is earth The outer 2 pins are data Figure 4 shows the four different types of connection that can be made with this connector plug gg EiB AWA Data Cable Saag
7. s are pre configured in the factory and shipped as repeaters Terminator Aterminator is a device that is placed at both ends of a channel to prevent signal reflections Signal reflections distort the signal waveform and can cause loss of communications in an unpredictable manner UNIT DESCRIPTION On the underside of the unit there are two data ports and two power sockets see Figure 3 On the front of the unit there are two terminator switches two data test sockets four LED s and a push button see Figure 2 The unit is supplied with a plug pack power supply two data cable connector plugs a DC power jumper lead and 2 external data cable terminators The label on the front of the unit is made of a material that can be written on During commissioning of the network record the channel numbers on this label for later reference Copyright 2013 Thomas amp Betts Australasia ABN 062 074 810 898 Rev 2 0 19April2013 1 STANILITE Complete Solutions in Emergency Lighting 40 0 Mounting Hole Stanilite Indicates power is connected i J Power Shows flow of data and flashes each time a S Traffic packet is forwarded from one channel to the other S Service Switch to on position when data port is at end Request of cable Switch to off position when data cable A Service loops in and out of data port On glermina lor ops inan p 131 0 Off Channel Write channel nu
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