©Measurlogic
Page 21
MQ0051-20F
7334 S. Alton Way, Centennial CO 80112
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web: www.measurlogic.com
5.3.2
CT Ratings, Digital Output Mapping and Backlight
Switch 2
•
Switch 2 controls 3 separate functions through the binary states of the switches:
o
The brightness of the backlight,
o
The CT Primary Current Rating
o
The pulse rate for digital output 3
Description
Switch Position
1
2
3
4
5
6
7
8
Backlight Brightness
X
CT Primary Current Rating
X
X
X
X
Pulse Rate for Output 3
X
X
•
Positions 1-2 dictate the mappings for Digital Output 3. The table below represents the different settings. If
the switches are both set to the OFF position, the digital output will be
configurable
through the
communications interface instead.
Switch 2.1-2.2 - Digital Output Mapping
SW 2.1
SW 2.2
Mapping
OFF
OFF
CONFIGURABLE
OFF
ON
1 pulse / 0.1kWh
ON
OFF
1 pulse / 0.5kWh
ON
ON
1 pulse / 1.0kWh (Default)
•
Positions 1-2 dictate the mappings for Digital Output 3. The table below represents the different settings.
If the switches are both set to the OFF position, the digital output will be
configurable
through the
communications interface instead.
•
Position 8 controls the display backlight. Position the switch
ON
for a backlight and
OFF
for no backlight.
•
Position 7 is not used.
•
Positions 3-6 dictate the CT ratio of the meter (for 333mV and 5A CTs ONLY). The tables below represent
the switch settings for various CT Primary Current Ratings. If the switches are all set to the OFF position, the
CT ratio will be
configurable
through the communications interface instead. If Rogowski Coil CTs are being
used, then all the CT Primary switches MUST also be left in the OFF position. Please see the next pages for
more details.