2.5 REAR SERIAL PORT 2
Optional rear serial port (RP2 /SK4)
Use For SCADA communications (multi-drop)
Standard EIA(RS)485, K-bus, EIA(RS)232
Designation SK4
Connector 9 pin D-type female connector
Cable Screened twisted pair (STP)
Supported Protocols Courier
Isolation Isolation to SELV level
Constraints Maximum cable length 1000 m for RS485 and K-bus, 15 m for RS232
2.6 REDUNDANT ETHERNET PORTS
Redundant Ethernet Ports
Use Redundant serial communications over fibre
Connector IEC 874-10 BFOC 2.5 –(ST®) (1 each for Tx and Rx)
Fibre Type Multimode 50/125 µm or 62.5/125 µm
Supported Protocols IEC 61850, DNP 3.0 over Ethernet
Supported Redundancy Protocols
SHR Self Healing Protocol
RSTP Rapid Spanning Tree Protocol
DHP Dual Homing Protocol
PRP Parallel Redundancy Protocol
Wavelength 850 nm MM
2.7 IRIG-B (DEMODULATED)
IRIG-B Interface (Demodulated)
Use External clock synchronisation signal
Standard IRIG 200-98 format B00X
Connector BNC
Cable type 50 ohm coaxial
Isolation Isolation to SELV level
Constraints Maximum cable length 10 m
Input signal TTL level
Input impedance 10 k ohm at dc
Accuracy < +/- 1 s per day
2.8 IRIG-B (MODULATED)
IRIG-B Interface (Modulated)
Use External clock synchronisation signal
Standard IRIG 200-98 format B12X
Connector BNC
Cable type 50 ohm coaxial
MiCOM P747 Chapter 16 - Technical Specifications
P747-TM-EN-1 387
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