Extended Communications; D.20 Comm Interface; D.20 Splitter; D.20 Rs-485 Interface - GE D20 Installation And Operation Manual

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Extended To extend communications to multiple peripherals, use the D.20 Communications
Communi- Interface or the D.20 Splitter, each of which will allow peripherals to be sited
cations remotely from the D20.
In conjunction with the D.20 RS-485 Adaptor, the D.20 Communications Interface
acts as a communication repeater to overcome the limit of 31 peripherals on a single
RS-485 link.
The D.20 Communications Interface can be used in conjunction with any of the
following plug-in adaptors:
•

D.20 RS-485 Interface

•
GFO/PFO Adaptors
The D.20 Splitter can be used only with the GFO/PFO adaptors.
D.20 Comm Use the D.20 Communication Interface module when you require one-to-one
Interface communication links with peripherals.

D.20 Splitter

Use the D.20 Splitter when you require one-to-four communication links with
peripherals, especially if peripherals are clustered in different areas of the substation.
D.20 RS-485 The D.20 RS-485 Interface provides the repeater function, which can only be
Interface implemented on the D.20 Communications Interface.
GFO and PFO Glass Fiber Optic (GFO) and Plastic Fiber Optic (PFO) adaptors are used to provide
Adaptors either glass or plastic fiber optical cable extensions to the D.20 Link. These allow
interference free links to peripherals that are sited at a remote distance from the main
D20 installation.
Extended When power requirements for multiple peripherals exceed the base system
Power limitations, use the D.20 DC Interface module.
D.20 DC The D.20 DC Interface module is used:
Interface
•
As power input for additional peripherals on a D.20 Link
•
For power supply to peripherals on a D200 vertical slot multi-node
implementation which cannot use the D20 Link for peripheral power supply
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