GE Multilin
F60 Feeder Protection System
3-37
3 HARDWARE
3.3 DIRECT INPUT/OUTPUT COMMUNICATIONS
3
3.3.8 IEEE C37.94 INTERFACE
The UR-series IEEE C37.94 communication modules (modules types 2G, 2H, 76, and 77) are designed to interface with
IEEE C37.94 compliant digital multiplexers or an IEEE C37.94 compliant interface converter for use with direct input and
output applications for firmware revisions 3.30 and higher. The IEEE C37.94 standard defines a point-to-point optical link
for synchronous data between a multiplexer and a teleprotection device. This data is typically 64 kbps, but the standard
provides for speeds up to 64
n
kbps, where
n
= 1, 2,…, 12. The UR-series C37.94 communication modules are either
64 kbps (with
n
fixed at 1) for 128 kbps (with
n
fixed at 2). The frame is a valid International Telecommunications Union
(ITU-T) recommended G.704 pattern from the standpoint of framing and data rate. The frame is 256 bits and is repeated at
a frame rate of 8000 Hz, with a resultant bit rate of 2048 kbps.
The specifications for the module are as follows:.
•
IEEE standard: C37.94 for 1
×
64 kbps optical fiber interface (for 2G and 2H modules) or C37.94 for 2
×
64 kbps optical
fiber interface (for 76 and 77 modules).
•
Fiber optic cable type: 50 mm or 62.5 mm core diameter optical fiber.
•
Fiber optic mode: multi-mode.
•
Fiber optic cable length: up to 2 km.
•
Fiber optic connector: type ST.
•
Wavelength: 830 ±40 nm.
•
Connection: as per all fiber optic connections, a Tx to Rx connection is required.
The UR-series C37.94 communication module can be connected directly to any compliant digital multiplexer that supports
the IEEE C37.94 standard as shown below.
The UR-series C37.94 communication module can be connected to the electrical interface (G.703, RS422, or X.21) of a
non-compliant digital multiplexer via an optical-to-electrical interface converter that supports the IEEE C37.94 standard, as
shown below.
The UR-series C37.94 communication module has six (6) switches that are used to set the clock configuration. The func-
tions of these control switches is shown below.
842753A1.CDR
Summary of Contents for F60 UR Series
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Page 30: ...1 20 F60 Feeder Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 48: ...2 18 F60 Feeder Protection System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Page 126: ...4 30 F60 Feeder Protection System GE Multilin 4 2 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Page 354: ...5 228 F60 Feeder Protection System GE Multilin 5 9 TESTING 5 SETTINGS 5 ...
Page 382: ...6 28 F60 Feeder Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Page 398: ...8 8 F60 Feeder Protection System GE Multilin 8 2 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Page 414: ...A 14 F60 Feeder Protection System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Page 492: ...B 78 F60 Feeder Protection System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Page 530: ...D 10 F60 Feeder Protection System GE Multilin D 1 IEC 60870 5 104 APPENDIXD D ...
Page 542: ...E 12 F60 Feeder Protection System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Page 558: ...x F60 Feeder Protection System GE Multilin INDEX ...