GE N60 Instruction Manual page 82

3.3 DIRECT INPUT AND OUTPUT COMMUNICATIONS
the send timing outputs of data module 1 is also paralleled to the terminal timing inputs of data module 2. By using this con-
figuration, the timing for both data modules and both UR–RS422 channels are derived from a single clock source. As a
result, data sampling for both of the UR–RS422 channels is synchronized via the send timing leads on data module 1 as
shown below. If the terminal timing feature is not available or this type of connection is not desired, the G.703 interface is a
viable option that does not impose timing restrictions.
3
Figure 3–35: TIMING CONFIGURATION FOR RS422 TWO-CHANNEL, THREE-TERMINAL APPLICATION
Data module 1 provides timing to the N60 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 vary by manufacturer.
3-28
Tx1(+) W 2a
Tx1(-) W 3b
RS422
Rx1(+) W 4b
CHANNEL 1
Rx1(-) W 3a
W 6a
Shld.
+ W 7a
CLOCK
–
W 8b
W 4a
Tx2(+)
Tx2(-) W 5b
RS422
W 6b
Rx2(+)
CHANNEL 2
W 5a
Rx2(-)
W 7b
Shld.
com
W 2b
SURGE W 8a
N60 Network Stability and Synchrophasor Measurement System
Data module 1
Signal name
SD(A) - Send data
SD(B) - Send data
RD(A) - Received data
RD(B) - Received data
RS(A) - Request to send (RTS)
RS(B) - Request to send (RTS)
RT(A) - Receive timing
RT(B) - Receive timing
CS(A) - Clear To send
CS(B) - Clear To send
Local loopback
Remote loopback
Signal ground
ST(A) - Send timing
ST(B) - Send timing
Data module 2
Signal name
TT(A) - Terminal timing
TT(B) - Terminal timing
SD(A) - Send data
SD(B) - Send data
RD(A) - Received data
RD(B) - Received data
RS(A) - Request to send (RTS)
RS(B) - Request to send (RTS)
CS(A) - Clear To send
CS(B) - Clear To send
Local loopback
Remote loopback
Signal ground
ST(A) - Send timing
ST(B) - Send timing
831022A3.CDR
3 HARDWARE
GE Multilin