ABB MB300e two networks connectivity through a Multiplexer
This time we are connecting the two ABB MB300E networks through a Multiplexer using two different Interfaces (one for each network), to provide two redundant networks over the radio . The MUX output is an E1 port (E1 is about 32 channels , to segregate all of its traffic) that is directly connected to 1+1 HSB radio. This is the basis of our old design and i see this as a very good architecture to follow up with the two cited netwoks we are talking about, because i think the MUX is doing a great job here , don't you think so?
Thansks for all of you for participating in this.
Please provide more details about the multiplexer and radio.
If the multiplexer works like a VLAN-tagging switch, parts of the precious and very much desired isolation between the network is lost.
A singular fault on a trunc:ed VLAN connection may affect all VLANs:
- if trunc link is lost; all networks are lost
- if power supply is cut; all networks are lost
- if radio modem malfunction; all networks could be lost or sprayed with packets*
*) Advant controllers running the MB300 protocol stack in the main CPU may see a large load increase if subjected to a network storm. Overload may halt the controller. To protect the controller an intelligent carrier module (SC520) can be used in AC450 and slave numbers 1 thru 6 but NOT 7 or 8. For AC410 the CI547 MB300 communication module is an likeworthy option.