Communication Protocols; Inter-Relay Communications - GE C70 Instruction Manual

2 PRODUCT DESCRIPTION
RS232
Front port: 19.2 kbps, Modbus RTU
RS485
1 rear port: Up to 115 kbps, Modbus RTU, DNP 3,
IEC 60870-5-103
Typical distance: 1200 m
Isolation: 2 kV, isolated together at 36 Vpk
FIBER ETHERNET PORT
PARAMETER FIBER TYPE
100 MB MULTI-
MODE
Wavelength 1310 nm
Connector LC
Transmit power –20 dBm
Receiver sensitivity –30 dBm
Power budget 10 dB
Maximum input –14 dBm
power
Typical distance 2 km
Full duplex yes
Redundancy yes
ETHERNET (10/100 MB TWISTED PAIR)
Modes: 10 MB, 10/100 MB (auto-detect)
Connector: RJ45
SIMPLE NETWORK TIME PROTOCOL (SNTP)
clock synchronization error: <10 ms (typical)
SHIELDED TWISTED-PAIR INTERFACE OPTIONS
INTERFACE TYPE TYPICAL DISTANCE
RS422 1200 m
G.703 100 m
RS422 distance is based on transmitter power and
does not take into consideration the clock source
NOTE
provided by the user.
LINK POWER BUDGET
EMITTER, TRANSMIT
FIBER TYPE POWER
820 nm LED, –20 dBm
Multimode
1300 nm LED, –21 dBm
Multimode
1300 nm ELED, –23 dBm
Single mode
1300 nm Laser, –1 dBm
Single mode
1550 nm Laser, +5 dBm
Single mode
These power budgets are calculated from the manu-
facturer's worst-case transmitter power and worst
NOTE
GE Multilin
RECEIVED POWER
SENSITIVITY BUDGET
–30 dBm 10 dB
–30 dBm 9 dB
–32 dBm 9 dB
–30 dBm 29 dB
–30 dBm 35 dB
C70 Capacitor Bank Protection and Control System

2.4.8 COMMUNICATION PROTOCOLS

PRECISION TIME PROTOCOL (PTP)
PTP IEEE Std 1588 2008 (version 2)
Power Profile (PP) per IEEE Standard PC37.238TM2011
Slave-only ordinary clock
Peer delay measurement mechanism
PARALLEL REDUNDANCY PROTOCOL (PRP)
(IEC 62439-3 CLAUSE 4, 2012)
Ethernet ports used: 2 and 3
Networks supported: 10/100 MB Ethernet
OTHER
TFTP, HTTP, IEC 60870-5-104, Ethernet Global Data (EGD)

2.4.9 INTER-RELAY COMMUNICATIONS

case receiver sensitivity.
The power budgets for the 1300 nm ELED are calcu-
lated from the manufacturer's transmitter power and
NOTE
receiver sensitivity at ambient temperature. At
extreme temperatures these values deviate based
on component tolerance. On average, the output
power decreases as the temperature is increased by
a factor 1dB / 5°C.
MAXIMUM OPTICAL INPUT POWER
EMITTER, FIBER TYPE
820 nm LED, Multimode
1300 nm LED, Multimode
1300 nm ELED, Single mode
1300 nm Laser, Single mode
1550 nm Laser, Single mode
2.4 SPECIFICATIONS
MAX. OPTICAL
INPUT POWER
–7.6 dBm
–11 dBm
–14 dBm
–14 dBm
–14 dBm
2-25
2