30
31
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.
PRINTER
SERIAL 485
TERMINAL
POWER
COUNTER
MH1
CTS RXD TXD RTS
GND
GND
485+A
485-B
CTS RXD TXD RTS +VP
EARTH
AUX OUTPUTS
PULSE INPUTS
AUX I/O
GND
GND
GND
IN 1
OUT1
OUT2
OUT3
TEMPERATURE PROBE
ASSY
84040 REV.
RTD+S
RTD-D1
RTE-S
RTD+D
OUT4
OUT5
IN 2
IN 3
IN 4
+5V OUT
+VP
+VP
PGND
OUT6 +VP
SOL
+VP
PGNDOUT7
+VF
+VF
IN5
OUT8
GND
GND
+12-24V
ACC
MH4
C1
J20
J6
J3
J2
J1
J7
J12
J15
P1
TP1
J5
J14
J18
J19
J10
J17
J11
J7
C2
MH5
MH3
MH2
A
B
11
10
1213
52
53
54
55
56
A
B
A
B
J2 (RS-485)
J3 (RS-232)
A Position
B Position
24
25
juMPer PosITIon
(j10)
CoMMunICaTIon
ProToCol
WIre
Lap Pad
A
RS-232
J3 - 46 (red)
Flashing Software on the CPU Board
EZCommand
B
RS-232
J3 - 47 (red)
External Computing Device
B
RS-232
J3 - 47 (red)
External Computing Device
B
RS-485
J2 - 24 (red)
J2 - 25 (violet)
Multimeter Network
B
RS-485
J2 - 24 (red)
J2 - 25 (violet)
PoWer InsTallaTIon
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.
The J2 terminal block is
permanantly attached to the
CPU board.
Do Not Try To Remove J2
