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Questions tagged [db9]

The tag has no usage guidance.

-1
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3answers
145 views

Is it common practice to connect power supply to a DB9?

I got a project where many sensors which uses CAN were connected to a DB9. And sensor power (24V and GND) too. I want to connect the DB9 terminal to power however how can I do it in a safe way? If I ...
0
votes
5answers
139 views

How should I mount DB9 Connector?

How do I mount that DB9 Connector on this GPB? Any tricks?
-2
votes
2answers
424 views

What's the difference between a null modem cable and a gender changer? [closed]

Please ignore this question. It doesn't address the problem I was trying to solve (XY problem) and my edits have been reverted. Because it has answers, I can't delete it. It should be closed as off-...
0
votes
1answer
82 views

Does this wiring pattern for a DB9 cable exist as a standard cable?

I have a scientific instrument that uses a DB9 cable to connect to the standard RS232 port on a computer for communication. I've deconstructed one of the cables as I needed to make another one but I ...
1
vote
1answer
47 views

CAN communication on tms320f28377s using usbToCan driver with db9 connector

I am using launchpad xl f28377s. It has a CAN transceiver which is intagreted. How can I connect this card to usbToCAN ixxat driver using db9 connector ? Thanks, Regards.
1
vote
2answers
189 views

What could be the reason for this RS422 wiring?

I usually follow the following wiring scheme for RS422 wiring: As seen above R+ to T+; R- to T-; T+ to R+ and T- to R-. So for each point to point wire R and T coupled but the signes are same i.e + ...
0
votes
0answers
79 views

How to wire RJ12 to db9f modular adaptor?

I have a RJ-12 to DB9f modular adapter. There are 6 wires that come out of the adaptor (White, Black, Red, Green, Yellow Blue) - these, as I gather from pin out diagrams, correspond to the 6 jacks of ...
0
votes
1answer
33 views

Two devices on Y 9pin Serial cable to 25pin printer input - Data Corruption

I have't been able to find a solution, and was hoping for some clarity. I have 2 machines (one is a bill counter, one is a coin sorter) that both support printing over DB9 serial connection, and one ...
3
votes
0answers
337 views

RS232 using a MAX3232 chip problems [closed]

I am trying to use RS232 to TTL convertor much like this: https://www.amazon.com/MAX3232-Female-Serial-Converter-Module/dp/B00BXX2OU2 I am not sure if the chip is authentic MAXIM or some knock off. ...
-2
votes
2answers
373 views

3.5mm to DB9 connector (differences) [closed]

I have 2 different type of connectors of 3.5mm to DB9 that I use to send RS232 commands from device to a screen. The 3.5mm is attached to the device on the serial port and the DB9 to a serial cable ...
0
votes
2answers
1k views

How to Make DB9 F/F serial RS232 mini gender changer?

I want to connect My "USB to RS232(Male end)" to my NanoVolt Meter having RS232 male port. To make both communicate i need to make DB9 F/F serial RS232 mini gender changer. Any Circuit or suggestion ...
0
votes
1answer
180 views

Serial DB9 to Serial 3.5mm over HDMI cabling

Good afternoon everyone. I am trying to control a Samsung TV via Serial from a remote processor and I am trying to use spare installed HDMI cabling to do it. Samsung does not have an open API for IP ...
0
votes
3answers
441 views

How to mount a DB-9 adapter to an enclosure

I have a DB-9 connector that needs to be mounted to an electronics enclosure. This hole for the DB-9 connector will be manually cut out. Question: How can the DB-9 connector be secured to the ...
3
votes
1answer
145 views

Capacitors for MAX232

I want to use this chip (ST3232CDR) as an RS232 transceiver. The problem is that I want to power the chip using 2 levels of voltage (3.3V and 5.0V) using a simple jumper, but in the datasheet (http://...
1
vote
3answers
498 views

Db9 shield connection? in plastic hood!

at my work there are a network of identical devices each of which control some 50 location-guidance light units. These devices or controllers are all linked together and then to a main server/computer ...
1
vote
3answers
2k views

Changing DB9 Gender: Crossover or Straight? [closed]

I have a USB-DB9(Male) that needs to communicate with a device that has a DB9(Male) port. Do I connect both DB9(male) ports together using a null modem (crossover) cable or a straight through cable? ...
0
votes
1answer
226 views

RS485 Pinout when using PyModbus

I am trying to control a RS-485 RTU device (Love 16C-3) using a Python script (pymodbus library) that runs on a Windows 10 PC. The hardware is connected to the ...
0
votes
2answers
1k views

Making a DB9 Cable

I need to make a DB9 cable due to the need to have a custom pin out. I will get a few StarTech.com DB9 Serial Male D-Sub Crimp Connector (C9PCM) to get started. What crimping tool do I need to ...
4
votes
2answers
2k views

DB9 male or female Connector in Board

In my design I am using RS232 with DB9 connector in my PCB. idea is to log the data in PC and for programming via serial. Which connector I need to use in my board , it is male DB9 or female DB9. Q1) ...
0
votes
1answer
240 views

Extra 2 DB9 pins connection

Many DB9 symbols have 2 additional pins other than the 9 signal and GND pins that they are known for. How and to what are these 2 pins connected ? Pins 10 and 11. Is it connected to chassis ground or ...
2
votes
2answers
2k views

Voltage Conversion In PC Serial (DB9) Port

First of all, I am not even a noob when it comes to electronics. I don't even know what I am asking is possible but here it comes. At first glance, it may seem as an computer-related question, but ...
0
votes
4answers
2k views

What is a 3 wire type cross linked serial cable?

I'm trying to use a controller which uses Serial communication with the PC. The documentation says I need to get a 3 wire type cross link serial cable. Is this a null modem cable? The following ...
1
vote
1answer
4k views

Pin assignment on rj45 when using rs232

I am having a problem creating a cable to connect with two devices. The first devisce is an Intellivue MP70 that I want to connect to the RS232 port using an RJ45 end. On the other side there should ...
1
vote
2answers
3k views

Straight vs Null Modem Serial cable confusion

I have a cable having a DB 9 male at one end and a female at another end. I will be using this cable to connect BeagleBoard Xm ver C1 to the serial port of my PC. I understand the pins with respect ...
3
votes
3answers
4k views

Can I connect a “J1708” port to my computer?

This question is related to another question I posted here on the new Reverse Engineering site. I'm working with a small public transit agency on a neat open-source project that will help us to offer ...
2
votes
1answer
211 views

Is there any standard which defines that a particular connector or header on PCB has to be male or female?

Is there any standard which defines that connector (DB9, DB25, USB or header) type has to be MALE or FEMALE while choosing one to use on circuit board? I am designing a microcontroller circuit board ...
2
votes
2answers
40k views

How do I do the 6 pin RJ11 to RS232 female serial adapter wiring?

I'm new to wiring and I have this RJ11 to DB9 RS232 adapter, and I'm not sure how to correctly insert the RJ11 wires into the DB9 female end. http://www.blackbox.com/Store/Detail.aspx/DB9-RJ-11-...
2
votes
2answers
2k views

Is my SparkFun RS232 Shifter SMD faulty?

Product Link I am connecting this to an Arduino. (once Arduino programmed I removed the USB connector as it shares the serial comms with Pin0&1) RS232<->Arduino VCC <-> 5V GND <-> GND ...
2
votes
5answers
9k views

Questions about wires in a DB9 cable

I stripped a DB9 extension cable which I will use to connect to a DB9 connector on one end and an RJ45 on another. I need to make connections to pin 2, 3, and 5 on the DB9 side. When I stripped the ...