1-12
1
Receive ± 2.4 Vdc minimum, ± 25 Vdc maximum
Levels
Signals AA, AB, BA, and BB
1.9.5 RS-422/RS-485 Specifications
The 9099 has balanced RS-485 line drivers and receivers that provide RS-422
and RS-485 compatible differential signal pairs. The line drivers and receiv-
ers are designed to operate with up to 1200 meters of twisted-pair cable. The
transmitter can be set for continuous on operation or it can be tristated when
not transmitting.
Modes Transmitter always on (RS-485 Mode Off) or
tristated when not transmitting (RS-485 mode On)
Transmit +2 Vdc differential for binary 0 or On
Levels -2 Vdc differential for binary 1 or Off
Receive ± 0.2 Vdc minimum, ± 25 Vdc maximum,
Levels differential or single-ended input with other input line
biased at mid-range.
Signals SD, RD
Signal pairs combined by internal jumpers.
Termination 3.3 volt Termination network with 100 Ω load resistor.
Network Network selected by jumpers.
1.9.6 Alarm Inputs
The 9099 has two TTL signal inputs with 10 kohm pullups to +5 Vdc. Input
levels should be < 0.6 Vdc for low and > 1 Vdc for high. The signals are
sampled at a > 1 kHz rate and reported in the Operational Register in the Status
Reporting Structure.
Содержание 9099
Страница 20: ...1 16 1 Figure 1 1 9009 Outline Dimensions ...
Страница 24: ...1 20 1 Figure 1 3 9099 Certificate of Compliance ...
Страница 54: ...3 8 3 Figure 3 1 Status Reporting Structure Flash Configuration Reset ...
Страница 94: ...3 48 3 This page left intentionally blank ...
Страница 100: ...4 4 6 This page is left intentionally blank ...
Страница 161: ...A 49 A4 Refer to the ErrorLogger utility for the error value definitions Error Meaning 0 No error ...