I/O Peripheral Module Assembly; Hot-Swap Peripherals - GE D20 Installation And Operation Manual

GE Energy
Familiarization
, continued
I/O Peripheral Each D20 peripheral I/O module consists of two separate assemblies:
Module
•
WESDAC logic panel, for Data Acquisition and Control
Assembly
•
WESTERM panel, for field Termination
The logic panel contains the logic circuitry and active components. The termination
panel provides terminations for all field I/O, power, the local WESMAINT port, and
the HDLC port for the D.20 Link.
The logic board sits in a metal enclosure and plugs directly into the termination
panel. The termination panel sits on a 5.25" wide metal panel designed for flat or
rack mounting. The logic panel enclosure is faced with semi-transparent acrylic,
through which the user can monitor LED displays for various peripheral functions
and all field I/O points.
Hot-swap The WESDAC board can be hot-swapped off the WESTERM board without
Peripherals disconnecting the power. A module failure is indicated on the LED displays. If a unit
fails, you can unplug the failed WESDAC unit and replace it with a working unit
while the power remains on. Once the new unit is installed, the D20ME/ME II
automatically downloads the appropriate database parameters to the module to make
it operational.
Note:
General
Full
Metal Mounting
Plate
This can be done without removing power from the peripheral, hence
"hot-swap".
Installation and Operations Guide
994-0078-2.00-7
D20/D200
Acrylic Display
Cover
Terminal Blocks
29