This document could not be shown here. Open the PDF.
Text of this document2 pages · 484 words
Page 1
application sheet RRAAKKOO CCOONNTTRROOLLSS WA-NEX APPLICATION NOTES The Rako WA-NEX is a The Rako CAN data network has a maximum length of approximately network extender and can be 3km. When connecting devices in a daisy chain fashion this limit is used in instances where a unlikely to be exceeded. However when devices are connected to a network exceeds the maximum hub location in a 'home run' or 'star' fashion large projects may reach permissible or if the installed this limit. The reason for this is that to enable star wiring, connections wiring does not allow correct should be made into a RAKStar unit. Whilst the RAKStar offers great connection of a Rakom network. benefits in terms of being able to fault find and isolate cabling problems the way in which it achieves this is to create a series of data loops where the data is sent along one leg, only to be returned via a 'star termination' and thus on to the next leg. On larger projects this can result in surprising network lengths. For more details on how the RAKStar works see the document 'RAKStar diagnostics'. When the maximum network length is approached the network may become unreliable and intermittent. The solution to this problem is to split the network at a suitable point and add a WA-NEX (network extender unit) which creates two separate networks, both of which can have a 3km length. An alternative is to use two Bridge units connected over an ethernet network and use the Rako Etherbridge method of connection. The advantages of using the WA-NEX over Etherbridge include the lack of reliance on a 3rd party network. Additionally the WA-NEX allows functionality such as firmware upgrades across the entire network and if configured on the network (not necessary as it can be used as a 'plug and play' device) can give network diagnostics information. Etherbridge is still a valid means of connecting two separate networks, for example when two separate buildings, which are only connected via ethernet, both require two communicating Rako networks. For more information on Etherbridge connections refer to the document 'Etherbridge set-up'. If a network is intended to be wired as a 'daisy chain' system it is common for the wiring to be inadequate to allow correct connections. This is most common when separate RAK locations are spread across different floors. As the WA-NEX allows two separate networks it is then possible to split the networks where the cabling problem exists. Two examples of problem wiring that can be overcome by the use of a WA-NEX are given overleaf. telephone +44 (0) 1634 226666 fax +44 (0) 1634 226667 www.rakocontrols.com
Page 2
application sheet RRAAKKOO CCOONNTTRROOLLSS WA-NEX APPLICATION NOTES Example 1. RAKs located on separate floors with inadequate cabling between floors. Example 2. More than two legs of a network at a RAKLink. telephone 44 (0) 1634 226666 fax 44 (0) 1634 226667 www.rakocontrols.com + +
Need assistance or looking to source this item?