Communications Module; Power Supply Module - GE D90 Plus Instruction Manual

CHAPTER 3: INSTALLATION
IRIG-B port

Communications module

DANGER:
CAUTION:

Power supply module

PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
IRIG-B is a standard time code format that allows stamping of events to be synchronized
among connected devices within one millisecond. The IRIG time code formats are serial,
width-modulated codes which can be either DC level shifted or amplitude modulated (AM).
Third party equipment is available for generating the IRIG-B signal; this equipment may use
a GPS satellite system to obtain the time reference so that devices at different geographic
locations can also be synchronized.
For additional information, refer to:
Real time clock on page 140
The communications module contains two ports for Ethernet communications, designated
as port 2 and port 3. These are fully independent from each other and from port 1 on the
main processor module. The communication module ports support redundancy and
several protocols not supported by port 1.
The fiber optic communication ports allow for fast and efficient communications between
devices at 100 Mbps. Optical fiber may be connected to the D90
wavelength of 1310 nm in multi-mode.
The optical fiber sizes supported are 50/125 µm and 62.5/125 µm. The fiber optic port is
designed such that the response times will not vary for any core that is 62.5 µm or less in
diameter. For optical power budgeting, splices are required every 1 km for the transmitter-
receiver pair. When splicing optical fibers, the diameter and numerical aperture of each
fiber must be the same. In order to engage or disengage the ST type connector, only a
quarter turn of the coupling is required.
Observing any fiber transmitter output may cause injury to the eye!
Ensure the dust covers are installed when the fiber is not in use. Dirty or scratched
connectors can lead to high losses on a fiber link.
The power supply module provides power to the relay and supplies power for dry contact
input connections. It can be connected to any of the following standard power sources.
• DC power: 110 V DC, 125 V DC, 220 V DC, or 250 V DC.
• AC power: 115 V AC or 230 V AC.
Figure 22: IRIG-B connection
ELECTRICAL INSTALLATION
Plus
supporting a
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