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Serial RS-232C length


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#1
mikhaelwallace

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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?
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#2
Retired Tech

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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.
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#3
mikhaelwallace

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Wow thats more than enough info thanks
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