Page C-2
STATUS OF EIA/TIA-562 (RS232), RS422A/485 SIGNALS
VOLTAGE
NEGATIVE
POSITIVE
BINARY STATE
1
0
CONDITION
MARK
SPACE
FUNCTION
OFF
ON
CHARACTERISTICS OF RS422A-RS485 SIGNAL IN IDLE STATE
EIA RS442A/485 - CCITT V11
+ TX A
- TX B
+ RX A'
- RX B'
A has a lower potential than B in the idle
state (1, MARK or OFF)
A' has a lower potential than B' in the idle
state (1, MARK or OFF)
NOTE:
In an idle state, differentials sTX and +RX are at a lower potential than
signals -TX and -RX.
This remark is particularly important when connecting other RS422A-RS485
interfaces. In effect, there is considerable confusion concerning the idle state in which
the line should be found, and in the names for sTX, +RX, -TX and -RX (A, A',
B and B') in the various interfaces of different manufacturers.
Содержание MI400 Series
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Страница 17: ...SECTION 2 MI400 Series MI400 RKMI400 MI400 24V ...
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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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