Welcome to Geeks to Go - Register now for FREE

Need help with your computer or device? Want to learn new tech skills? You're in the right place!
Geeks to Go is a friendly community of tech experts who can solve any problem you have. Just create a free account and post your question. Our volunteers will reply quickly and guide you through the steps. Don't let tech troubles stop you. Join Geeks to Go now and get the support you need!

Javascript Disabled Detected

You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.

Serial RS-232C length

Started by mikhaelwallace , Aug 13 2005 08:42 AM

Please log in to reply

#1
mikhaelwallace

Posted 13 August 2005 - 08:42 AM

Member

Member
61 posts

How long can you make a serial cable? (RS-232C) wondering because of its many uses in home automation. and if it can be long, do they make extentions for the cables?

#2
Retired Tech

Posted 13 August 2005 - 08:51 AM

Retired Staff

Retired Staff
20,563 posts

Where there are 2 sets of figures the top one is RS232 the one below it is RS423

RS-232 Specs.
SPECIFICATIONS
RS232
RS423

Mode of Operation
SINGLE
-ENDED
SINGLE
-ENDED

Total Number of Drivers and Receivers on One Line
1 DRIVER
1 RECVR
1 DRIVER
10 RECVR

Maximum Cable Length
50 FT.
4000 FT.

Maximum Data Rate
20kb/s
100kb/s

Maximum Driver Output Voltage
+/-25V
+/-6V

Driver Output Signal Level (Loaded Min.)
Loaded
+/-5V to +/-15V
+/-3.6V

Driver Output Signal Level (Unloaded Max)
Unloaded
+/-25V
+/-6V

Driver Load Impedance (Ohms)
3k to 7k
>=450

Max. Driver Current in High Z State
Power On
N/A
N/A

Max. Driver Current in High Z State
Power Off
+/-6mA @ +/-2v
+/-100uA

Slew Rate (Max.)
30V/uS
Adjustable

Receiver Input Voltage Range
+/-15V
+/-12V

Receiver Input Sensitivity
+/-3V
+/-200mV

Receiver Input Resistance (Ohms)
3k to 7k
4k min.