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Joined: Dec 2006
Posts: 106
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Joined: Dec 2006
Posts: 106 |
RS232 is all about speed at a distance, I believe the spec length is 25' for full speed. If it is running at lower speeds then the distance is ok, most monitoring equipment runs at 9600 baud, which MAY be ok for 75', it is pushing it. I too would suggest the DB9's on either end, less parts means less to go wrong.
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Joined: Apr 2001
Posts: 1,390
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Joined: Apr 2001
Posts: 1,390 |
Actually theres a little more to it than just speed. I deal with a lot of rs232 connections to termservers and concentrator hubs, mostly i buy from digi.com. Anyhow here is link with a brief breakdown in regards to cable specs. You may also find the right pin-out for your db9-rj45 connection on that site also, i only do db25-rj45 ~r https://ftp1.digi.com/support/termi...60int/cabling/cabling_specifications.pdf
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Joined: Jul 2003
Posts: 6,768
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Joined: Jul 2003
Posts: 6,768 |
All db9 to 8 pin modular are not alike.
Besides the male/female issues you have to look at the internal wiring, WECO or USOC.
I would make a db9F to db9M straight through if you want to avoid problems. Specs are 50 foot max but 75 feet should work if you are not at 19200.
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Joined: Aug 2005
Posts: 16
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OP
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Joined: Aug 2005
Posts: 16 |
Alright, I wired the adapters matching pin to pin, put an over-the-counter 4 foot cat5 patch cable between them, and connected this frankenstien cable to my laptop with the FlowLink software installed. It worked. Connected and retrieved the data quickly. I am running the full size cable to the workstation from the flowmeter today. With any luck, it to will work an I'll post a follow up.
Thanks,
Stevens
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Joined: Apr 2001
Posts: 1,390
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Joined: Apr 2001
Posts: 1,390 |
Specs are 50 foot max...
This is a common misnomer that does not take into account new cable technologies (i.e. cat5). We have plenty of terminals between 200-300'/9600 that run fine.
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Joined: Jul 2003
Posts: 6,768
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Joined: Jul 2003
Posts: 6,768 |
It's not a misnomer it's a spec.
Yes it will work beyond 50 ft.
If you look at old Comdial documentation they support 500 feet on a serial cable.
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