Question about 3Com Computers & Internet

1 Answer

RS-422 connection RJ12

I have a generic rs232 to rs422 converter that I need to connect to a daktronics led sign. I need to know if there is a standard pinout for tx/rx when wired through a rj12 6 pin connector

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

What I was told through the mfg. was:
pins 1,8 =NC
pins 2,7= Chassis Ground
Pin 3= TX-
Pin 4= TX+
Pin 5= RX-
Pin 6= RX+

This would actually be a RJ45 (8pin) but uses the 6 pin cable and only 4 com wires.
Evidentally there is no standard for the pin usages for serial communications with RJ connectors. So this information might not be valid for other equipment.

Posted on Jan 21, 2009

  • smoovie2003
    smoovie2003 Aug 27, 2012

    Did you manage to connect ? I have a daktronics led sign..about 20 years old ...that i have no clue how to connect to..please help me out... smoovie2003@yahoo.com

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

RS422 or RS232


As far as I know ALL Panasonic Toughbook
(which have a bult-in serial port)
the serial ports (DB9) are RS232.

Good Luck!
Regards,
Richard - Montreal Based
Panasonic Canada Toughbook Authorized Dealer since 1989

Jul 06, 2014 | Panasonic Toughbook CF-52 (CF-52ELNBDAM)...

Tip

Options for Adding Serial Ports The serial port is prevalent on PC's ...


Options for Adding Serial Ports
The serial port is prevalent on PC's as well as scores of industrial, scientific and consumer devices, making it a convenient starting point for communications. Since RS-232 itself is only suited to short connections (50 ft. max.) many applications require that it be adapted to fit requirements. RS-422, typically used for extending RS-232 communications, provides full duplex communications between two devices. It can also provide one way communications from one master to several slaves. RS-485 communications standard allows cable lengths up to 4000 feet. It also provides very high noise immunity. Multidrop connections up to 32 different nodes can be made over a single twisted pair cable along with a signal ground connection.
This article summarizes the choices a system designer has when adding a serial (RS-232, RS-422, or RS-485) communications device. There are many different ways to add additional serial ports to your Desktop PC, Palm, or Laptop PC. USB, PCMCIA, PCI and ISA are some of the methods that will be discussed.
The Universal Serial Bus (USB) provides a high data rate and Hot Swap connection for PCs, providing an easy connection to a wide variety of multimedia and network USB devices. Generally considered to be for home or office use, USB is finding its way into Industrial applications.
PCMCIA Serial Ports are yet another way to add serial ports to a PC that has PCMCIA Slots available. Most Laptops today offer only one (if any at all) DB9 type serial ports. A PCMCIA Serial Card is a good way to add a serial port (or ports) to any laptop that is low on available serial ports (RS-232, RS-422 or RS-485).
PCI Cards are becoming more popular as a way to add serial ports to desktop PC's. PCI type slots are becoming the "norm" in standard PC's today, and PCI Serial Cards are an excellent way to add serial ports. The standard Desktop PC may only come with one serial port standard (if any serial ports at all). PCI Serial Cards use Software Drivers to address the ports to the PC.
ISA Cards are yet another way to add serial ports to the older desktop PC's. ISA type slots are becoming scarce in standard PC's today, but are still an excellent way to add serial ports. The ISA Cards are typically addressed using dip switches and shunts or jumpers to set IRQ's for each port. No Software Drivers are required with ISA style serial cards.
Palm OS PDA's may be connected to RS-422 or RS-485 data circuits using Palm adapters. These adapters offer total portability for collecting data and field service chores. The Palm device and the adapter will usually slip into a shirt pocket. Some models use the PDA's connecting cable, some include a cable and some are cradles that allow the PDA to nest in place and connect directly to the Palm base socket. PalmTerm Freeware allows you to transmit and receive data from the Palm serial port.

on Sep 12, 2010 | Computers & Internet

1 Answer

Replacement patch cable for Epson kitchen printer to Micros e7


As long as the ends (connections) of the cable are in good condition and only the cable was cut; I would solder the wires to the corresponding colored wires to one another and insulate the soldered joints to prevent them from shorting out. If you have what is called Shrink tubing (From Radio Shack) slip a small piece over the wire prior to soldering the two ends. After the two wires are joined; slip the wrap over the joint and heat with a hot iron or hair dryer. The wrap shrinks around the soldered joint and insulates it from the other wires. Do that for all wires to be joined together. When done the bundle if wires may be bulky, but they will get the job done. Lastly surround the wires with electrical tape to keep them all together.

Dec 18, 2013 | Epson TM-U220 Matrix Printer

1 Answer

My cash drawer in not working


Kindly check the Data cable ( RJ11) if connected properly, connector points turned green. Try Changing it.

hope below links help you


6 pin RJ12 6P6C male connector diagram and applications pinouts RJ12 to rs232
Pinout cable and connector diagrams usb serial rs232 rj45...

Sep 13, 2012 | Partner Tech PT-8800 POS Terminal -...

2 Answers

I need a converter that will allow me to hook up the rj12 cables to the coaxial connections on a 16 channel revo dvr


hi;
you wan to hook up coaxial to rj12 ,if you you do that the wire of rj12 has not to exceed 3 meters
cause camera signal (video) to become weak. Camera Video signal has to be fed only to coaxial cable, coaxial cable has an insulation to prevent interference.
so if you want to hook up be sure put a shielded wire.
thanks......hope this help.

Sep 03, 2011 | Revo America Indoor Dome Security Camera...

3 Answers

I want to know what printers will work with my model EL1333G desktop computer.


ANY... there is no law against using one printer over another, you can download almost every manufacturer's "driver" for that printer.
You need a Printer Driverfor the specific model, this is the interface between the software and your printer. Connections can be USB, Wireless, Parallel, Serial RS232, and Mac RS422, network,

Dec 03, 2010 | Office Equipment & Supplies

1 Answer

How to connect my laptop via RS232 to my NEC XN120 telephone exchange using the PC Pro telephone system software in order to programme the exchange?


I connect mine with the RS-232 cable in the side of my laptop. It's a Toshiba rinning Windows XP (nee Vista).

Since you're asking the question, I guess you don't have an RS-232 port. For my Vista machines without serial ports, I own a USB to RS-232 adapter cable. On our side of the pond, they carry names like Iogear GC-232. Here's a U.K. search result http://www.amazon.co.uk/USB-RS232-Converter-Cable/dp/B00077DJIQ

Sometimes, you have to go into the device manager and change the port assignment of these adapters to something in the 1-4 serial port range. That was common with the old software.

Carl

Feb 22, 2010 | NEC Lands Phones

1 Answer

Printronix5003H+ table mismatch


I'm sure you have fixed your printer by now... but reflash the printer.

Flash memory is contained in SIMMs (single in-line memory modules) located
on the controller board. Printer emulation and operating system software are
loaded into flash memory at the factory, but you will install software in some
situations:
• The customer buys the PGL or VGL graphics, Expansion-CT, or IPDS
option after the printer is installed
• The customer needs to upgrade printer software
• The customer needs different emulation software
• You have replaced the controller board
• You have added or replaced the flash memory SIMM
Emulation and operating system software are stored as a compressed file on
a 3.5 inch floppy diskette. This file is “executable.” You will expand it and copy
it into printer flash memory.
You can load software through the serial, parallel, or Ethernet port of the
printer.
1. If the printer has an Ethernet interface, refer to the PrintNet User’s Manual
for the download instructions. You are finished with this procedure. If you
are going to load memory through the serial or parallel port, continue with
this procedure.
2. Make a printout of all saved configurations. (Refer to the User’s Manual.)
(Installing new software erases all saved configurations. You will use the
printouts to restore printer configuration.)
3. Set the printer power switch to O (off).
4. If the printer is already connected to the serial or parallel port of a
computer capable of running an MS-DOS® based PKZIP® self-extracting
file, go to step 11. If not, go to step 5.
5. Unplug the AC power cord from the printer.
6. Disconnect all data input cables from the printer interfaces.
7. Connect a parallel data cable to the LPT1 port or a serial data cable to the
COM1 port of an IBM-compatible computer that is using the PC-DOS™ or
MS-DOS operating system.
NOTE: You can connect the cable to the LPT2 port if the LPT1 port is alreadyin use. The load commands are different if you use this port, as
described in the note after step 18.
8. Connect the data cable to the appropriate I/O port of the printer.
9. Plug the AC power cord into the printer.
10. Power on the computer.
11. Insert the emulation or upgrade diskette into diskette drive A (or B) of the
computer.
12. Make the diskette drive the active drive by typing the following at the DOS
prompt:
A:<return> (If the diskette is in drive B, type B:<return>)
13. Get the name of the compressed file on the diskette by listing the
contents of the diskette; at the DOS prompt type:
DIR<return>
The compressed file on the diskette takes the form FILENAME.EXE
Now write down the complete name of the file with the .EXE extension.
14. On the printer control panel, press and hold down the ON LINE + PAPER
ADVANCE keys. Without releasing the keys, power the printer on.
Continue holding the ON LINE and PAPER ADVANCE keys down for five
seconds, then release them.
NOTE: The port default is CENTRONICS; this is the standard load through
the parallel port. If you want to use the default, continue at step 18.
15. When you see “WAITING FOR PROGRAM DOWNLOAD” on the LCD,
press the < (NEXT) key. “SELECT DOWNLOAD PORT =
DATAPRODUCT” appears on the LCD.
16. Press < (NEXT) again to cycle through the download ports available in
the printer:
DATAPRODUCT (parallel)
CENTRONICS* (parallel) (default port)
RS232-9600 (RS-232 serial, 9600 baud)
RS232-19.2K (RS-232 serial, 19200 baud)
RS232-38.4K (RS-232 serial, 38400 baud)
RS232-115K (RS-232 serial, 115000 baud)
RS422-9600 (RS-422 serial, 9600 baud)
RS422-19.2 (RS-422 serial, 19200 baud)
RS422-38.4K (RS-422 serial, 38400 baud)
RS422-115K (RS-422 serial, 115000 baud)
17. When the printer download port you want to use is displayed on the LCD,
press ENTER. “WAITING DOWNLOAD / PORT = <your selection>
appears on the display.
18. At the DOS prompt on the computer type:
FILENAME.EXE -pb<return>
where FILENAME.EXE is the compressed file you noted in step 13. This
command decompresses the file on the diskette and copies it as a binary
file into the flash memory on the printer controller board.
NOTE: If you are loading the file using the LPT2 port on the computer, enter
the following DOS command:
FILENAME.EXE -pb 2 <Return>
The 9600 baud rate is the only selection older versions of DOS can
use. The baud rate information entered in the following DOS
commands must match the selection you made in step 16.
the load process and status. (LCD messages are listed in Table 2,
page 37.)
CAUTION Do not interrupt the downloading process once it has started.
Interrupting a download will damage the flash memory on the controller
board and PrintNet card ( if installed).
19. When the new program has successfully loaded into memory and the
printer has reset itself, set the printer power switch to O (off).
20. Unplug the AC power cord from the printer.
21. Remove the diskette from the computer and store it with the printer.

LineMatrix
www.sinca.biz
Toby

Jul 07, 2008 | Printronix Line Matrix P5215 Printer

1 Answer

Black-box regd


There are NO drivers needed or even provided by BlackBox for this device. It simply uses hardware circuits to convert an RS232 signal to a RS 422/485 signal. My first reaction to this question is: Do you have your PC serial port at 9600baud which is the default RS232 signalling rate for this device? (I guess I probably won't hear a response on this as the question is almost a year old, with no attempts by anyone to solve it. I'm the only glutton for punishment.) ZT3000 "Beta tester of "0"s and "1's"

Sep 28, 2006 | Black Box Serial Adapter

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

833 people viewed this question

Ask a Question

Usually answered in minutes!

Top 3Com Computers & Internet Experts

NBX_Tech
NBX_Tech

Level 1 Expert

58 Answers

steve morris
steve morris

Level 3 Expert

1675 Answers

micky dee

Level 3 Expert

2644 Answers

Are you a 3Com Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...