Installation, Operation and Service Manual
LKAT
2
+24V
© 2018 DynAmp, LLC
Page 26
046404 E
5.10 EARTH GROUNDING
Here is a detailed description of the Earth Ground connection path:
1.
The input power cable assembly connects CONN4 to the mains power.
2.
Refer to the LKAT
2
System Wiring Diagram and wire system accordingly.
3.
The earth ground wire connects from CONN4 to the FLTR1 metal case only. The
FLTR1 metal enclosure is not connected to copper foil traces on the Power Supply PC
Board Assembly, the steel standoff inserts or the steel PCB mounting bracket.
4.
The Earth Ground connection is only used to shunt common mode noise to earth.
IMPORTANT NOTE
There is no electrical connection from any part of the LKAT Main PCB or its optional daughter
PCBs to Earth / Chassis ground or the steel PCB mounting bracket or panel. There is no
electrical connection between the steel PCB mounting bracket or panel to Earth Ground.
5.11 CONFIGURING THE LOW PASS FILTER
The LKAT
2
System includes a two pole configurable low pass filter. This filter may be enabled
without affecting the scaling of the output in the pass band. The frequency response of the
LKAT
2
without the low pass filter activated is shown in Figure 3.1.
Refer to the Main pc board assembly drawing at the end this manual. To configure the low
pass filter, set switches as shown in the table below.
Table 5.3
Low Pass Filter Switch Settings
SW1 position
A
B
C
D
No low pass filtering
OFF
OFF
OFF
ON
330 Hz cutoff
OFF
OFF
ON
OFF
660 Hz cutoff
ON
ON
ON
OFF
