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Normal RS -232 cable

Hi

I want to know RS-232 cable pin connections
EX- pin 1 to 1 connector specification

pls send to me

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5 4 3 2 1
9 8 7 6

1 - Not Used
2 - Transmit Data (TD)
3 - Receive Data (RD)
4 - Request to Send (RTS)
5 - Clear to Send (CTS)
6 - Grounded
7 - Signal Ground (Gnd)
8 - Data Carrier Detect (DCD)
9 - Data Terminal Ready (DTR)

Posted on Sep 30, 2008

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Good morning
I have any problem about conecting betwen USB with RJ45.
Thank you a lot, give me solution my problem.

Posted on Apr 20, 2009

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Problem with serial connection with AMD motherboard


Software that accesses serial ports usually allow you to specify WHICH port you want to connect via.

Your new board should have COM1 and possibly COM2... but perhaps your old setup was running from COM3?

Connect the Casio to COM1, and check the software you are using... set that to "look" at COM1 also. That should work!

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1 Answer

RS 232 cable manufacturer


Is 25 pin or 9 pin connector?
In either case pins 2 & 3 are Tx & Rx data, you might have to swap them.
On DB-9 pin 5 is GND, on DB-25, Pin 1 & 7 are GND.
Here is a link to a reliable source of pinouts for you to construct your cable.

Apr 06, 2009 | Network Accessories

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How to use cross cable and straight cables in network


ok, i think what you mean is this.  Crossover cable is for connecting 2 computers together without the need for a router.  also called pc-to-pc.  Straight cables need the use of a router or hub to connect 2 computers together.  Hope this helps, if not let me know more info.

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2 Answers

How do you wire the cat 5e multi jack? Which wires go where?


Hi tonybenjamin

Here are the pinouts for a regular fly lead (PC to Switch"hub") and for a cross over cable (PC to PC)
Front view of the RJ45 MALE pin. Pin's top with Locking clip 02ca060.jpg
1. Fly Lead

Name Pin Wire Color Pin Name TX+ 1 White/Orange 1 TX+ TX- 2 Orange 2 TX- RX+ 3 White/Green 3 RX+ 4 Blue 4 5 White/Blue 5 RX- 6 Green 6 RX- 7 White/Brown 7 8 Brown 8
2. Cross Over

Name Pin Pin Name TX+ 1 3 RX+ TX- 2 6 RX- RX+ 3 1 TX+ RX- 6 2 TX- Extra Pins 4 4 Optionl Pins
(connected straight
to same pins) 5 5 7 7 8 8

Regards
Go-Tech

Dec 14, 2008 | Leviton Quickport 5G108 Category 5e...

1 Answer

Crossover cable


Unless you have the proper cable crimper for making network cables, it would be faster and easier to just hop down to your local computer store, or even Walmart/Target and buy one.

If you do have the tool and want to make one from scratch, follow the steps listed below.

NOTE: Only two pairs of wires in the eight-pin RJ-45 connector are used to carry Ethernet signals. Both 10BASE-T and 100BASE-T use the same pins, a crossover cable made for one will also work with the other.

*Note: Even though pins 4,5,7, and 8 are not used, it is mandatory that they be present in the cable.

The combination for the pins is:

Connector 1: Pin1 to Connector 2: Pin3
Connector 1: Pin2 to Connector 2: Pin6
Connector 1: Pin3 to Connector 2: Pin1
Connector 1: Pin6 to Connector 2: Pin2

Cheers,

Keith

Dec 08, 2008 | Avaya 9 ft. Crossover Cable...

1 Answer

Meaning of Db and the use of Db9-male Cabl


The D is the shape of the connector when looked at it on it's side. The second letter (A,B,C,D,E) defines the amount of pins in the D connector. "DB9" is actually called DE by the standard and the E=9 pins. A=15, B=25, C=37, D=50, E=9. This standard was set in place by ITT Corp (Not the school) in 1952, and DE-9 connectors were used for tons of applications. (Machinery, Cars, etc). If you are only referring to the computer uses, the connector is widely known as RS-232 or a "Serial" port. These ports in computers were/are used for devices like early printers, scanners, networking hardware, or even as a method of connecting to the Internet at one point.

Dec 05, 2008 | Parallel 6 Foot DB9 Male - DB9 Female Null...

1 Answer

Rj45 male to db9 male cable for ups


If you have a BackUPS CS, you are probably either using it with the USB cable that is supplied or with the 940-0128A supplied by APC, which permits running the UPS in dumb mode. By building your own cable, you can now run the BackUPS CS models (and perhaps also the ES models) using smart signalling and have all the same information that is available as running it in USB mode.
The jack in the UPS may be easily use a 8 pin RJ45 connector. It is easy to construct the cable by cutting off one end of a standard RJ45-8 ethernet cable and wiring the other end (three wires) into a standard DB9F female serial port connector.
PC Signal PC pin UPS Pin UPS signal RxD 2 2 TxD TxD 3 8 RxD GND 5 7 Ground FG Shield 4 Frame Ground Though these UPSes are USB UPSes, APC supplies a serial cable (typically with a green DB9 F connector) that has 940-0128A stamped into one side of the plastic serial port connector.
Here is suggested scheme of original 940-0128A cable
APC Part# - 940-0128A computer --------- Inside the Connector--------- UPS DB9-F | | RJ45 pin - signal | | Pin - Color | | 4 DSR ->|---+ | | | diode resistor | 6 DTR ->|---+---->|----///---o kill power | 8 Orange | | 1 DCD <-|----+ | | | | 2 RxD <-|----+----------------+--o low battery| 3 Brown | | | 7 RTS ->|----------+--///--+ | | | | | +--///--+ | | | | 8 RI <-|----+----------------+--o on battery | 2 Black | | | 9 CTS <-|----+ | | signal | 5 GND --|-----------------------o ground | 7 Red | | 3 TxD | | | chassis | Chassis/GND |-----------------------o ground | 4 Black | | | Not connected | 1, 5, 6, 9, 10 --------------------------------------

Sep 30, 2008 | Digi (76000200)

1 Answer

Ethernet cord


Hi Dear Friend,
There can be number of reasons for this problem. To solve the problem, you can try these:

1. Check that RJ 45 connector, connected to switch/hub/pc is showing LED indication or not at the both the ends i.e pc end and at the switch/hub end.
2. Make sure switch and pc configuration should be correct and is not changed by mistake.
3. If LED indicators are not glowing any of the ends i.e PC or Switch end there might be a problem of ethernet cable, possible broken/cracked cable at some place or also possible that RJ 45 connector problem.
4. Also try the same cable to connect to different pc. Check, if it work then or not.

Hope this will solve the problem.
In case any other info is required pls. feel free to contact.

Thanks

Aug 02, 2008 | Kensington Portable Ethernet Cord (33052)

1 Answer

Network connection


Hi roamer, It seems you are using dial up connection at home that is through telephone line. In hotel you are using broadband or any other connection. For both pathch cables and their connectors are different. One is RJ45 other is RJ11. You can identify yourself by checking cable patching.

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1 Answer

Cat5e


Some testers do not test ALL the wires. Some will only test pair 1 and 2. You may want to use a DVM (Digital Voltmeter) set on the ohms function and check continuity on each of the eight wires from RJ-45 to RJ-45 connector or use a cable tester that will check all the wires. If you use a DVM check 1 to 1, 2 to 2 etc. for continuity. Good will read 0 ohms, open will read infinity or OL on some meters. 90% of all cable problems are poorly crimped or broken wires at the RJ-45 connector. It is difficult to be sure which end has the bad connection so you may need to change BOTH RJ-45 connectors. Do one, then check the cable, if it doesn't work, do the other one. It is a 50-50 shot. I prefer and encourage the rewiring color code using the EIA 568A standard. Starting at pin 1 the color code would be orange-white, orange, green-white, blue, blue-white, green, brown-white, brown. You don't have to do it that way, but you must make sure that the same color wire is on the same pin on each connector. If all else fails, you can go to you neighborhood computer shop for help in installing connectors. It takes a lot of practice to do it right. Hope this helps

Nov 30, 2005 | Honeywell Multimedia, Cat5e X2, RG6/U...

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