3-36
L60 Line Phase Comparison System
GE Multilin
3.3 DIRECT INPUT AND OUTPUT COMMUNICATIONS
3 HARDWARE
3
Figure 3–41: TIMING CONFIGURATION FOR RS422 TWO-CHANNEL, 3-TERMINAL APPLICATION
Data module 1 provides timing to the L60 RS422 interface via the ST(A) and ST(B) outputs. Data module 1 also provides
timing to data module 2 TT(A) and TT(B) inputs via the ST(A) and AT(B) outputs. The data module pin numbers have been
omitted in the figure above since they may vary depending on the manufacturer.
c) TRANSMIT TIMING
The RS422 interface accepts one clock input for transmit timing. It is important that the rising edge of the 64 kHz transmit
timing clock of the multiplexer interface is sampling the data in the center of the transmit data window. Therefore, it is impor-
tant to confirm clock and data transitions to ensure proper system operation. For example, the following figure shows the
positive edge of the Tx clock in the center of the Tx data bit.
Figure 3–42: CLOCK AND DATA TRANSITIONS
d) RECEIVE TIMING
The RS422 interface utilizes NRZI-MARK modulation code and; therefore, does not rely on an Rx clock to recapture data.
NRZI-MARK is an edge-type, invertible, self-clocking code.
Data module 1
Data module 2
Signal name
Signal name
SD(A) - Send data
TT(A) - Terminal timing
TT(B) - Terminal timing
SD(B) - Send data
RD(A) - Received data
RD(A) - Received data
SD(A) - Send data
SD(B) - Send data
RD(B) - Received data
RD(B) - Received data
RS(A) - Request to send (RTS)
RS(A) - Request to send (RTS)
RT(A) - Receive timing
CS(A) - Clear To send
CS(A) - Clear To send
RT(B) - Receive timing
CS(B) - Clear To send
CS(B) - Clear To send
Local loopback
Local loopback
Remote loopback
Remote loopback
Signal ground
Signal ground
ST(A) - Send timing
ST(A) - Send timing
ST(B) - Send timing
ST(B) - Send timing
RS(B) - Request to send (RTS)
RS(B) - Request to send (RTS)
831022A3.CDR
W 7a
W 2b
W 8a
7W
Shld.
Shld.
Tx1(+)
Tx2(+)
Tx1(-)
Tx2(-)
Rx1(+)
Rx2(+)
+
com
Rx1(-)
Rx2(-)
–
INTER-REL
A
Y
C
OMMUNICA
TIONS
W 3a
W 5b
W 5a
W 3b
W 2a
W 6a
W 6b
W 7b
W 8b
W 4b
W 4a
RS422
CHANNEL 1
RS422
CHANNEL 2
CLOCK
SURGE
Tx Clock
Tx Data
Содержание UR series
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Страница 12: ...xii L60 Line Phase Comparison System GE Multilin TABLE OF CONTENTS ...
Страница 32: ...1 20 L60 Line Phase Comparison System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 54: ...2 22 L60 Line Phase Comparison System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Страница 132: ...4 30 L60 Line Phase Comparison System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 438: ...7 8 L60 Line Phase Comparison System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Страница 478: ...8 40 L60 Line Phase Comparison System GE Multilin 8 3 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Страница 502: ...A 10 L60 Line Phase Comparison System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Страница 584: ...B 82 L60 Line Phase Comparison System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Страница 622: ...D 10 L60 Line Phase Comparison System GE Multilin D 1 PROTOCOL APPENDIXD D ...
Страница 634: ...E 12 L60 Line Phase Comparison System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Страница 642: ...F 8 L60 Line Phase Comparison System GE Multilin F 3 WARRANTY APPENDIXF F ...