Data Communications; Power Installation - Liquid Controls LectroCount LCR-II E3657 Series Installation Manual

daTa CoMMunICaTIons

rs-232 or rs-485 Communications
The LCR-II 840405 CPU board can communicate using RS-232 or RS-485 communication protocol. Data connections
are protocols is made at the J2 and J3 terminal blocks. For standard RS-232 terminal, (other than the Lap Pad), the
red input wire should be connected to J3-47.
A jumper (J10), located on the left side of the CPU board should stay in the B position for most applications; however,
to use a lap pad (PN E40301 and E403011) the jumper must be moved to the A position. See the diagram and the
table below.
J2 (RS-485)
GND
MH1
B Position
J1
J11
J17
J18
A Position
ASSY
84040
J19
MH2
TEMPERATURE PROBE
juMPer PosITIon
Lap Pad
Flashing Software on the CPU Board
EZCommand
External Computing Device
External Computing Device
Multimeter Network
30
J3 (RS-232)
CTS RXD TXD RTS 485-B 485+A GND CTS RXD TXD RTS +VP
MH4
J2 J3
PRINTER SERIAL 485 TERMINAL
J20
C2
POWER J6
COUNTER J7 J7
P1
J10
TP1
C1
PULSE INPUTS
J5
J12
AUX OUTPUTS
REV. MH3
+VF IN5 GND OUT8 +VF
J15
AUX I/O
+VP PGNDOUT7 +VP
MH5
J14
SOL
Do Not Try To Remove J2
The J2 terminal block is
permanantly attached to the
CPU board.
CoMMunICaTIon
(j10) ProToCol
A RS-232 J3 - 46 (red)
B RS-232 J3 - 47 (red)
B RS-232 J3 - 47 (red)
J2 - 24 (red)
B RS-485
J2 - 25 (violet)
J2 - 24 (red)
B RS-485
J2 - 25 (violet)
Power Installation overview
When you have made all of the data connections and finished installing all of the components, connect the power to
the LCR-II and the Epson printer. But before making the power connections, go through the vehicle system checklist
below, and ensure that the electrical system of the truck meets the minimum requirements for powering the LCR-II
and the Epson printer.
vehicle system Checklist
□ Clean any corrosion from the battery terminals and battery cable to guarantee a solid, tight connection.
□ Charge the battery in accordance with the manufacturer's specifications.
□ Ensure the alternator is large enough to meet the total demands of the truck, including the LCR-II. The LCR-II
requires a minimum of 5 A for proper operation. Run the truck at low idle with all accessories on (including
hose reel), and check the voltage with a multi-meter. The voltage should not drop below 11 V.
□ Inspect the electrical equipment on the vehicle, and ensure it is properly installed and operating correctly.
□ Determine whether the vehicle is grounded positively or negatively. Consult Liquid Controls if the vehicle
has a positive ground.
□ Make sure that any radio antennas are installed in accordance with the manufacturer's specification to
prevent RF interference.
WIre

PoWer InsTallaTIon

31