Meter Layout Released
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Cashpower Gemini PLC
– User Guide
© Gyr (Pty) Ltd
4
Meter Layout
Because all display and control functionality is at the customer interface unit, there is no local keypad
on the Gemini PLC meter.
Figure 4: Gemini PLC Front Panel Features
4.1
Rate of Consumption Indicator (Rate LED)
This red
LED provides the
reference
output for verifying the meter‟s metrological accuracy.
The
meter constant
for Gemini PLC is set to 1000 impulses/kWh. The
rate
LED will therefore flash
1000 times for every kWh of energy consumed.
4.2
Optical Communications Port
This port enables data to be transferred to and from the meter (e.g. the accessing of various registers
or downloading of new parameters) using a portable interrogation device. The optical port‟s
communication protocol complies with IEC 62056-21 Mode C.
4.3
Status Indicator
This yellow LED gives a quick visual indication of several important meter statuses and provides a
useful diagnostic function to assist utility staff. During normal operation it flashes once every 5
seconds (effectively a
power on
indication). Other status conditions are indicated by two or more
flashes at regular intervals as follows:
Status indicator
Combination of flashes
shows status: Power limit,
out of credit etc.
Unique serial number
Optical
communications port
Meter label
Each meter has a
unique identity label
printed at the time of
manufacture
Rate of
consumption
indicator (
rate
LED)
1000 pulses / kWh
Display
Standard meter types
are manufactured with
LCD display included
Terminal Cover
Normally supplied with short
terminal cover
Sealing Screw
Use of utility sealing wires
shows visible signs of
tampering
