Inter-Relay Communications Specifications; Test Specifications - GE D90 Plus Instruction Manual

CHAPTER 2: PRODUCT DESCRIPTION

Inter-relay communications specifications

NOTE:
NOTE:

Test specifications

PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
TELEPROTECTION
Input points:...........................................................16 per channel
Remote devices: ..................................................3
Default states on loss of
communications:...........................................On, Off, Latest/On, Latest/Off
Ring configuration: ............................................No
Data rate:................................................................64 or 128 kbps
CRC: ...........................................................................32-bit
PARALLEL REDUNDANCY PROTOCOL (PRP) (IEC 62439-3 CLAUSE 4, 2012)
Ports used: .............................................................2 and 3
Networks used: ....................................................10/100 MB Ethernet
TYPICAL DISTANCE
RS422 interface: ..................................................1200 m (based on transmitter power; does not take into
G.703 interface: ...................................................100 m
850 nm laser (multimode) interface:..........2.0 km (50/125 μm cable with ST connector);
The typical distances shown are based on the assumptions for system loss shown below.
As actual losses vary from one installation to another, the distance covered by your system
may vary.
LINK LOSSES (850 NM LASER, MULTIMODE MODULE)
ST connector losses:..........................................2 dB (total of both ends)
50/125 μm fiber loss: ........................................2.5 dB/km
62.5/125 μm fiber loss: ....................................3.0 dB/km
Splice loss:..............................................................one splice every 2 km, at 0.05 dB loss per splice
System margin:....................................................3 dB of additional loss was added to calculations to
LINK POWER BUDGET (850 NM LASER, MULTIMODE MODULE)
Maximum optical input power: ....................–9 dBm
Minimum transmit power: ..............................–22 dBm (into 50 μm fiber), –18 dBm (into 62.5 μm fiber)
Maximum receiver sensitivity: ......................–32 dBm
Power budget: ......................................................10 dBm (for 50 μm fiber), 14 dBm (for 62.5 μm fiber)
These power budgets are calculated from the manufacturer's worst-case transmitter
power and worst-case receiver sensitivity.
PRODUCTION TESTS
Thermal: ..................................................................products go through a 12 hour burn-in process at 60°C
consideration the clock source provided by the user)
2.9 km (62.5/125 μm cable with ST connector)
compensate for all other losses, including age and
temperature
SPECIFICATIONS
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