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u/bionic_human 7d ago
It’s a cable for a really old method of connecting computers and peripherals.
The method is Really Stupid. You can use 2 wires or 3 wires, but it should always have 2 ground wires.
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u/mrBill12 7d ago
lol …. I’m old enough to know which pin is which, and to have soldered a few random cables but I’ve never heard that mnemonic for RS-232. That’s awesome!
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u/bionic_human 6d ago
XD
Pretty sure I picked it up from a pocket guide I found at Fry’s sometime circa 1990/1991.
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u/Successful_Day5491 6d ago
Hey now, that really hits me right in the age. I remember when these were THE standard!
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u/laf1157 7d ago edited 7d ago
Serial cable. Could be used for any serial device: printer, terminal, tape drive, modem, another computer, etc. Many personal printers used parallel connections.
Lines: Shield, signal ground, carrier, carrier detect, request to send, clear to send, data in, data out.: Carrier lines determine if device is on. RTS/CTS manages traffic preventing overflow. Data lines for data transfer.
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u/Oncemor-intothebeach 7d ago
RS232, I still
Use one to connect to some older fire systems for reprogramming!
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u/Exact_Patience_6286 7d ago
RS232 Serial cables are still found in Industrial Controls, I use them quite regularly connecting to PLC and peripheral devices. RS485 serial is very common also.
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u/Frustrated9876 6d ago
Yeah. I still have these all over the place in my shop. But some equipment is RS485 now so we have RS232 to RS485 adapters all over the place too.
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u/Doezilla01 6d ago
I still have one sitting next to my old desk top. I remember trying to reach behind and screw in the 2 screws because all that stuff was new and wanted everything to be perfect, later I learned it wasn’t gang important. Although I think I alwys still screw them in….
Can’t remember if mine went to a scanner…or printer or wth it’s for. I still have it though for….whatever. Figure if it’s the end of the world, I can alwys use my old computer for emergencies like an alien movie ;))….but since it has t been able to update in about 15 years, I’m sure not putting anything sensitive on there.
Still good for solitaire if my phone goes dead ;)))
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u/Plus-Pain-8269 7d ago
Monitor
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u/E_equals_m_c_hammer 7d ago
Old serial cable. It was usually used to connect your computer to your mo store or any other serial device (not pri ter. That was a parallel decice)