GE Grid Solutions
D20/D200 Technical Overview
GE Information
PRPI-019-3.00-10
29
Acrylic Display
Cover
Terminal Blocks
WE
ST
ER
M T
erm
ina
tio
n P
an
el
WESD
AC
Lo
gic
Pa
nel
Metal Mounting
Plate
Figure 18 D20 Peripheral I/O Module
The logic panel is housed in a metal enclosure, which plugs directly into the termination panel.
The logic panel enclosure is faced with a semi-transparent acrylic cover, which allows the user to
monitor LED displays for various peripheral functions and field I/O points.
If a unit fails, the operator unplugs the failed logic panel and replaces it with a working unit
while the power remains on. Once the new unit is installed, the D20/D200 automatically
downloads the appropriate operating software and database parameters to the module to make it
operational.
2.1.5 Environmental
Typical operating temperature range of -10°C to +55°C and a relative humidity range of 0 to
95%, non-condensing.
Note:
At higher extremes of the temperature and humidity operating ranges (i.e., when
temperature and humidity are both high), occasional errors may be observed on RS-
485/D.20 links; however, packets with errors are detected and retransmitted by the data
communications protocol. The net result is error-free communications.
Storage conditions, with equipment de-energised: temperature range of -40°C to +80°C (0°C to
+70°C for Graphics Display) and relative humidity less than 95%, non-condensing.
