LRWMANUAL 0321
KAM CONTROLS, INC.
39
485-
485+
GND
232 RXD
232 TXD
GND
GND
4-20-
4-20+
POWER+
POWER-
CHS
CHS
CHS
GND
DOUT
GND
DENSITY IN
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1
TP1
TP3
GND
LE
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2
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CAUTION:
LRW provides the power
for the 4-20 mA loop. Do NOT apply
external voltage as this will damage
the output/board.
Alarm Output
(Dry Contact,
max 1 Amp)
4-20 mA Density
Connection
Power Suply
24 VDC
(12 Watts)
RS232 Serial
Connections
Max 500
Ohms Max
Load
6 T R O U B L E S H O O T I N G
LRW™ Low Range Watercut
+1 713 784 0000
sales@kam.com
Made in the USA
www.KAM.com
FIG 6-2
TERMINAL BOARD
FIG 6-1
LCD DISPLAY PLATE
Screws
LCD Connector
1.
Turn off the field power supply to the LRW.
2.
Use a 5/64 Allen wrench to remove the set screw on the display cover.
3.
Turning it counterclockwise by hand, remove the display cover.
4.
Remove the four (4) screws on the LCD display plate with a Phillips screwdriver (FIG 6-1).
5.
Unplug the LCD connector from the terminal board (FIG 6-2) and set LCD display plate aside.
6.
Remove the four (4) screws on the Terminal PCB with a Phillips screwdriver. FIG 6-2.
7.
Carefully pull the Terminal Board away from the Processor board by firmly holding it on the edges and pulling
straight up. Pulling the unit sideways or at an angle may damage the 26-pin connection.
8.
Check for any fuses or surge protection devices visibly damaged on the bottom side of the Terminal PCB.
9.
If the board passes a visual check, reinstall the Terminal PCB on the LRW by carefully aligning the 26-pin header
with its corresponding mating connector on the Processor board. Push directly down and then install four (4)
screws.
10.
Connect the POWER+ and POWER- pins to the field power supply between 12-30V DC (+24V DC power is
preferred.
11.
Turn on power to LRW.
If the issue continues, please contact KAM technical support at askanengineer@kam.com or call +1 713-784-0000.
If the LCD display is off despite the LRW being powered on, please follow these instructions:
CHECKING THE LCD DISPLAY
