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Topic:
Rs232
This thread has 15 replies. Displaying all posts.
Post 1 made on Thursday September 14, 2017 at 22:39
N2OACCORD
Long Time Member
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139
Hi there,

Looking for opinions how to connect rs233 devices.

Should we use premade cables and cut them in half or?

Appreciate your suggestions.

Thanks.
Post 2 made on Thursday September 14, 2017 at 22:43
edizzle
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5,894
how can you connect two serial devices with a cable that is cut in half?
I love supporting product that supports me!
Post 3 made on Thursday September 14, 2017 at 22:57
mark65
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439
This is the only time you'll see me recommending Monoprice.
[Link: monoprice.com]
[Link: monoprice.com]

Pin them out using the EIA-561 standard. This is what ELAN, RTI, Savant, and others use.
Post 4 made on Thursday September 14, 2017 at 22:59
Ernie Gilman
Yes, That Ernie!
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Yeah, N2O, a little more detail will get you some answers.

Last time I used an RS232 device I connected an RS232 cable to it.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 5 made on Thursday September 14, 2017 at 23:33
edizzle
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On September 14, 2017 at 22:57, mark65 said...
This is the only time you'll see me recommending Monoprice.
[Link: monoprice.com]
[Link: monoprice.com]

Pin them out using the EIA-561 standard. This is what ELAN, RTI, Savant, and others use.

You are assuming he is using cat cable. I have to go a little Ernie on this one. The post was cryptic at best!
I love supporting product that supports me!
Post 6 made on Thursday September 14, 2017 at 23:58
Brad Humphrey
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2,174
N2OACCORD,
The problem people are having with your question is this: RS232 is a protocol and has nothing to do with the type of connection made. RS232 can be delivered between devices by many different types of connections - DB9, Phoenix connectors, RJ11, RJ45, 3.5mm TRS, etc...

So you will need to be a lot more specific about what you are asking.
Post 7 made on Friday September 15, 2017 at 00:10
AnilAppleLink
Long Time Member
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February 2012
204
I am assuming you would like to run a long RS232 DB9 cable between floors/walls etc... The monoprice CAT RJ45 to RS232 may be a great option and if it is Phoenix, XLR or some other type of connector you may want to run a shielded signal cable with a positive, negative and a ground.
Would help to know what 2 devices you are trying to connect and the distance.
--
Thanks,
Anil A. Apple Communication LLC. www.apple-link.com Pro-AV - Pro Lighting - Networking - Security Cameras - Home Theater For all your low voltage cabling needs
Post 8 made on Friday September 15, 2017 at 01:04
tgrugett
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1,815
I have switched in recent years to screw terminal DB9 adapters where DB9 connectors are required. I used to use the RJ45 to DB9 adapters but the pins are a pain and the housings can be too big in many cases.

The nice thing about screw terminal adapters is that you can quickly swap Rx and Tx if needed. Given the lack of good or consistent documentation from manufacturers, half the time it is a crap shoot if the device is straight or null. This way... who cares... it takes seconds to swap them.

Also many control manufacturers have gotten smart and are using screw terminal block, 3 pin jack, or RJ45 serial outputs with solid documentation on the pin outs.

If you make up straight for your end point female ports and Null for your end point male ports you will will have a high rate of success and when you don't get it right... so what.
Post 9 made on Friday September 15, 2017 at 01:49
edizzle
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On September 15, 2017 at 01:04, tgrugett said...
I have switched in recent years to screw terminal DB9 adapters where DB9 connectors are required. I used to use the RJ45 to DB9 adapters but the pins are a pain and the housings can be too big in many cases.

The nice thing about screw terminal adapters is that you can quickly swap Rx and Tx if needed. Given the lack of good or consistent documentation from manufacturers, half the time it is a crap shoot if the device is straight or null. This way... who cares... it takes seconds to swap them.

Also many control manufacturers have gotten smart and are using screw terminal block, 3 pin jack, or RJ45 serial outputs with solid documentation on the pin outs.

If you make up straight for your end point female ports and Null for your end point male ports you will will have a high rate of success and when you don't get it right... so what.

Or you could buy the pre-pinned units that come in null or straight ;)
I love supporting product that supports me!
Post 10 made on Friday September 15, 2017 at 01:49
Ernie Gilman
Yes, That Ernie!
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On September 14, 2017 at 23:58, Brad Humphrey said...
N2OACCORD,
The problem people are having with your question is this: RS232 is a protocol and has nothing to do with the type of connection made.

So you will need to be a lot more specific about what you are asking.

Here, for instance, is the connector for the first RS232 setup I ever got to know personally:



A few details would make all the difference.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
OP | Post 11 made on Friday September 15, 2017 at 02:00
N2OACCORD
Long Time Member
Joined:
Posts:
September 2005
139
My apologies,

My one device has tx, rx and ground screw terminals. The other device is a rs232 connector.

Thanks.
Post 12 made on Friday September 15, 2017 at 05:10
Brad Humphrey
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On September 15, 2017 at 02:00, N2OACCORD said...
My apologies,

My one device has tx, rx and ground screw terminals. The other device is a rs232 connector.

*facepalm*
Again, there is no such thing as an 'RS232 connector'. I'm going to take a guess here and assume you mean a DB9 connector - although I can't be sure.
In such a case, you can just cut the end off a DB9 cable. You will need to know the PIN out for the cable and then use you meter to check which wires go to the pins you need.
Or you could order a cable with bare wire on one end already and labeled:
[Link: milltechmarine.com]

Reference:
[Link: support.atlona.com]
Post 13 made on Friday September 15, 2017 at 09:15
lippavisual
Senior Member
Joined:
Posts:
December 2007
1,342
On September 15, 2017 at 01:04, tgrugett said...
I have switched in recent years to screw terminal DB9 adapters where DB9 connectors are required. I used to use the RJ45 to DB9 adapters but the pins are a pain and the housings can be too big in many cases.

The nice thing about screw terminal adapters is that you can quickly swap Rx and Tx if needed. Given the lack of good or consistent documentation from manufacturers, half the time it is a crap shoot if the device is straight or null. This way... who cares... it takes seconds to swap them.

Also many control manufacturers have gotten smart and are using screw terminal block, 3 pin jack, or RJ45 serial outputs with solid documentation on the pin outs.

If you make up straight for your end point female ports and Null for your end point male ports you will will have a high rate of success and when you don't get it right... so what.

I do the same and use the connectors from BTX. I believe they're called MaxBlox. Hell of a lot easier working with these, especially on commercial TV's.

I will still use the RJ45 Adapters in racks when both devices have a DB9.
Post 14 made on Friday September 15, 2017 at 10:16
Ranger Home
Super Member
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Posts:
June 2007
3,442
I have a laptop with a computer connector but the wall plate is a PC connector. How can I make that work?

:)
Post 15 made on Friday September 15, 2017 at 11:38
benjh1028
Long Time Member
Joined:
Posts:
May 2005
304
On September 15, 2017 at 10:16, Ranger Home said...
I have a laptop with a computer connector but the wall plate is a PC connector. How can I make that work?

:)

With HDMI connectors.......they solve EVERYTHING!
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