58 GENERAL D400 SUBSTATION GATEWAY USER’S MANUAL
IRIG-B CONNECTIONS CHAPTER 4: CONNECTING TO DEVICES AND NETWORKS
Figure 33: D400 Glass Optical Fiber Serial adapter
Plastic optical fiber
You can use 1 mm plastic optical fiber (POF) cabling with the D400 Plastic Optical Fiber
Serial adapter. The recommended termination is the Agilent Versatile Link Simplex
Connector.
When calculating cable length, consider the following optical power levels:
• Plastic optical fiber transmitter power is –9.0 ± 4.5 dBm
• Plastic optical fiber receiver sensitivity is typically –39 dBm
LED transmitters are classified as IEC 60825-1 Accessible Emission Limit (AEL) Class
1M. Class 1M devices are considered eye safe to the unaided eye. Do not view directly
with optical instruments.
Figure 34: D400 Plastic Optical Fiber Serial adapter
It is possible to saturate the receiver input if the cable used is too short. Inline attenuation
may be required.
See “Fiber optic serial adapter” on page 40 for configuration options.
To connect fiber optic
links to the Fiber Optic
adapters
Plug fiber optic cables into the corresponding TX and RX connectors.
IRIG-B connections
The D400 uses a pair of IRIG-B adapter cards, the IRIG-B Input Adapter and the IRIG-B
Distribution Adapter, to accept an IRIG-B signal from a GPS receiver then distribute the
signal to connected IEDs.
See “IRIG-B input adapter” on page 42 and “IRIG-B distribution adapter” on page 44 for
more information.
IRIG-B input adapter
The IRIG-B Input Adapter (GE Item No. 520-0211LF) plugs into a dedicated IRIG-B slot (slot
9) on the D400. The IRIG-B Input card accepts an IRIG-B signal in one of three input formats
through a corresponding connector type:
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