Installation, Operation and Service Manual LKAT
2
+24V
© 2018 DynAmp, LLC Page 7
046404 E
2.4 ADDITIONAL INDICATOR AND OUTPUT DETAIL
As noted on the specifications page, The LKAT
2
System Metering Unit includes several visual
indicators. These include:
• Accuracy Diagnostics (operational status) LEDs: green = OK, red = system problem (see
Section - “Theory of Operation”).
• Over / Reverse Current Trip status LEDs: green = measured current does not exceed the
setpoint, red = measured current exceeds the setpoint.
• (Optional) Illuminated LCD digital display of measured current.
Available via the Metering Unit output cable:
• Isolated signal output proportional to bus current being measured. This output may be
configured for various zero and full-scale values.
• Normally open and normally closed relay contacts indicate (AD) Accuracy Diagnostics
operational status (same as green and red LEDs).
• Normally open and normally closed relay contacts indicate over / reverse current trip
status (same as green and red LEDs). For failsafe operation, the relay coil is energized in
the normal condition (no over / reverse trip).
The table below lists the features associated with the Main and PE pc board assemblies.
Table 2.1
Main and PE PC Board Assembly Features
with PE PC Board
Assembly
Operational Status LEDs & Relay Contacts
Overcurrent / Reverse Trip Status LEDs & Relay
Contacts
1 +2 for 3 total
Checking field calibration of LKAT
2
Systems requires use of a reference current transducer
with calibration accuracy of 0.1% full-scale or better. Contact DynAmp, LLC for calibration of
the LKAT
2
System. Refer to “Maintenance and Spare Parts” section for more information.
2.5 INTERCONNECTION CABLE DETAIL
The LKAT
2
System is supplied with two cable assemblies in addition to those connected to the
Measuring Head.
The power input cable assembly. A keyed circular connector terminates one end for
connection to the Metering Electronics. The other end is unterminated for connection to the
power source by the user during installation.
The system output cable assembly. A keyed circular connector terminates one end for
connection to the Metering Electronics. The other end is unterminated for connection to the
power source by the user during installation. The system output cable is a 17-conductor type.
However, only 8 of the 17 conductors are used when the optional PE pc board assembly is
NOT installed. The unused conductors may be trimmed flush to cable jacket. The user
connects this cable from the Metering Unit to the appropriate inputs during installation.
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