Wiring RS-422 - confused.

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14 Aug 2017 13:10 #97450 by Moronicsmurf
Moronicsmurf created the topic: Wiring RS-422 - confused.
So i have this 7i76E card. and wanna wire a 7i73 pendant card, but i also wanna wire a 7i84 card for running a remote hardkey setup..

Wiring the pendant card is kinda straight up.. But when looking at the connectors in the some what to me strange documentation i can't seem to find a way of wiring the next serial card ?! Am i missing something vital here.. I wanna just chain the two serial cards after each other from one card to another.. but it seems i cant find were to wire the 7i84 to the 7i73 or vice versa after i wired either one of them to from the 7i76E card to J1.
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14 Aug 2017 15:13 #97455 by PCW
PCW replied the topic: Wiring RS-422 - confused.
You can only use one sserial expansion card per interface, To add additional cards you would need additional
RS-422 expansion ports (the 7I76E only has one built in expansion port)
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14 Aug 2017 17:19 #97474 by Moronicsmurf
Moronicsmurf replied the topic: Wiring RS-422 - confused.
Well that answers that then. And i can stop looking.. i can't run 2 cards, i need to decide either to use the 7i73 card or the 7i84 card.
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14 Aug 2017 17:59 #97477 by PCW
PCW replied the topic: Wiring RS-422 - confused.
You can run more sserial cards(up to 17 on a 7I76E), you just need a RS-422 daughtercard
(or just a SP491 chip wired to one of the TTL expansion ports to add a single port)
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14 Aug 2017 18:33 #97478 by Moronicsmurf
Moronicsmurf replied the topic: Wiring RS-422 - confused.
What daughtercard would you suggest then.. I'm piecing parts together here to make stuff work. I'm not an electrician.. =)
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17 Aug 2017 12:21 #97616 by andypugh
andypugh replied the topic: Wiring RS-422 - confused.

Moronicsmurf wrote: What daughtercard would you suggest then.. I'm piecing parts together here to make stuff work. I'm not an electrician.. =)


store.mesanet.com/index.php?route=produc...t_id=117&search=7i74
and (I think)
store.mesanet.com/index.php?route=produc...74_81&product_id=273

Would give you 8 smart-serial ports. You would need to ensure you had the right firmware to support it.

You would also need the right firmware (one which supports smart-serial on the expansion ports). There is a VHD file for it so it should exist somewhere.
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17 Aug 2017 17:33 #97662 by Moronicsmurf
Moronicsmurf replied the topic: Wiring RS-422 - confused.
Oh that was clever way of dealing with it.. not thought of that. Was looking at the 7i76E card blindly.. so a 7i92M should be able to deal with the fact im missing a parallell port on my machine im guessing - still a firmware issue tho?
store.mesanet.com/index.php?route=produc...69_62&product_id=302

I have several Ethernet ports on this computer tho. (its meant to run as a hardware accelerated router so it has several dedicated ethernet ports with hardware seperation)
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17 Aug 2017 17:40 #97664 by andypugh
andypugh replied the topic: Wiring RS-422 - confused.
No need for a 7i92M. The 7i74 should connect to one of the two 26-pin headers on the 7i76E.
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