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Page C-1
EXTRACTS FROM THE EIA STANDARD AND RS422A AND RS485
INTERFACE DEFINITION
The table below shows characteristics of the EIA standard concerning the EIA/TIA-
562 recommendation (RS232, EIA/TIA-574, EIA/TIA-561, etc.), RS422A and RS485.
It is useful to note in particular the maximum cable lengths allowed for the different
standards.
SPECIFICATIONS
EIA/TIA-562
(RS232 etc.)
RS-422A
RS-485
Type of communication
Unipolar
Deferred
Deferred
Number of transmitters
and receivers allocated
per line
1 transmitter
1 receiver
1 transmitter
10 receivers
32 transmitters
32 receivers
Maximum cable length
16.5 meters
1,320 meters
1,320 meters
Maximum speed
64 Kbits/sec
10 Mbits/sec
(over13 m)
10 Mbits/sec
(over13 m)
Voltage on transmitter in
common mode
±
25V
±
7V
-7V to +12V
Transmitter
voltage
Loaded
±
5V
±
2V
±
1.5V
level
No load
±
15V
±
5V
±
5V
Load resistor on
transmitter
3 to 7 K
Ω
100
Ω
54
Ω
Maximum
Transmitter
On
±
100 µA
current
loss
Off
Max V/300
Ω
±
100 µA
±
100 µA
Rise time
Max 30V/µs
Voltage range on receiver
input
±
15V
-7V to +7V
-7V to +12V
Reception sensitivity
±
3V
±
200 mV
±
200 mV
Receiver input resistor
3 to 7 K
Ω
Min 4 K
Ω
Min 12 K
Ω
Содержание MI400 Series
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Страница 17: ...SECTION 2 MI400 Series MI400 RKMI400 MI400 24V ...
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Страница 29: ...SECTION 3 MI400 RTS Series MI400 RTS MI400 24V RTS RKMI400 RTS ...
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Страница 41: ...SECTION 4 MI400 400 Series MI400 400 ...
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Страница 47: ...SECTION 5 Assembly Examples With FIXING PLATE RDMI RKMI ...
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Страница 55: ...SECTION 6 Temperature Tests ...
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Страница 61: ...APPENDIX A Distribution Signals ...
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Страница 65: ...APPENDIX B Troubleshooting ...
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Страница 69: ...APPENDIX C Extract from EIA standard Cable length ...
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