GE Energy
D20/D200
Installation and Operations Guide
General 994-0078-2.00-7
Full
15
Familiarization, continued
Other
Components
To complete a basic D20 implementation, several other components are required:
• Peripheral I/O modules
• D.20 Link for communication between the main board and the peripherals
• Interposing Relay Panels, the need for which depends upon the load
characteristics of the device that is controlled by the D20K or D20C control
peripherals. If this rating exceeds the contact rating of the D20K or D20C control
peripheral boards, then an Interposing Relay Panel is required. See “Interposing
Relay
s” page 34.
• When using
bit-based synchronous protocols a Universal Protocol Converter
(UPC) board is required to convert from byte to bit and back. The D20/D200
communicates asynchronously over its serial ports.
Note:
The jumper settings on the UPC are protocol-specific. See “Universal
Protocol Converter” page 34.
Other System
Configurations
• If you are building a redundant system, you will need additional cables to link
the active and standby units. See “D20/D200 Redundancy”, page 39.
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