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3-24
B90 Low Impedance Bus Differential System
GE Multilin
3.2 WIRING
3 HARDWARE
3
3.2.8 IRIG-B
IRIG-B is a standard time code format that allows stamping of events to be synchronized among connected devices. The
IRIG-B code allows time accuracies of up to 100 ns. Using the IRIG-B input, the B90 operates an internal oscillator with 1
µs resolution and accuracy. The IRIG time code formats are serial, width-modulated codes that can be either DC level
shifted or amplitude modulated (AM). Third party equipment is available for generating the IRIG-B signal; this equipment
can use a GPS satellite system to obtain the time reference so that devices at different geographic locations can be syn-
chronized.
Figure 3–22: OPTIONS FOR THE IRIG-B CONNECTION
Using an amplitude modulated receiver causes errors up to 1 ms in event time-stamping.
UR-series device
BNC (in)
Receiver
RG58/59 coaxial cable
GPS satellite system
GPS connection
IRIG-B (–)
4A
+
827756A8.CDR
IRIG-B
time code generator
(DC-shift or
amplitude modulated
signal can be used)
4B IRIG-B (+)
UR-series device
BNC (in)
Receiver
Twisted-pair cable
GPS satellite system
GPS connection
IRIG-B (–)
4A
+
IRIG-B
time code generator
(DC-shift or
amplitude modulated
signal can be used)
4B IRIG-B (+)
NOTE
Содержание B90
Страница 10: ...x B90 Low Impedance Bus Differential System GE Multilin TABLE OF CONTENTS ...
Страница 50: ...2 20 B90 Low Impedance Bus Differential System GE Multilin 2 3 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Страница 118: ...4 28 B90 Low Impedance Bus Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 284: ...5 166 B90 Low Impedance Bus Differential System GE Multilin 5 8 TESTING 5 SETTINGS 5 ...
Страница 334: ...10 8 B90 Low Impedance Bus Differential System GE Multilin 10 2 BATTERIES 10 MAINTENANCE 10 ...
Страница 338: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 460: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 476: ...E 10 B90 Low Impedance Bus Differential System GE Multilin E 1 IEC 60870 5 104 APPENDIX E E ...
Страница 502: ...viii B90 Low Impedance Bus Differential System GE Multilin INDEX ...