Liquid Controls LCR Install - Manual (Page 14)

14
Wiring the LCR
Wiring Customer-Furnished Remote START/Stop
Switch to LCR (Optional)
A user-supplied momentary remote START/STOP Switch
can be connected to terminal block J8, Pins 36 and 38 in
lieu of the odometer pulser. For programming instructions
to activate the user supplied remote START/STOP
Switch, refer to the LCR Set-up Manual (Bulletin No.
500050).
Preset/product Selector switch (optional)
LCR can be provided with a factory installed optional
preset switch for setting a preset delivery quantity from
the back of the vehicle. The preset switch is connected
to terminal block J8, Pins 35 and 38, as shown on page
15. For instructions on the operation of the preset switch,
refer to the LCR Set-up Manual (Bulletin No. 500050).
NOTE: The preset switch can also be used to select
one of four different products. Refer to the LCR Set-up
Manual for details.
Communication protocol selector switch (optional)
LCR can be provided with a factory installed optional
communication protocol selector switch. This optional
switch, which is housed in Port No. 1 on the LCR, allows
the user to select the RS-232 communication protocol
for use with the Liquid Controls Lap Pad terminal (switch
in “up” position), or the RS-485 protocol for use with a
handheld computer (switch in “down” position). This
protocol selection can be made without breaking Weights
& Measures seals on the LCR. Without this switch, any
change in protocol selection requires breaking Weights
& Measures seals to gain access to jumper switches on
the LCR circuit board (terminal J10).
CAUTION : This switch must only be activated with power
to the LCR “OFF”. If the protocol selector switch position
is changed with power supplied to the unit, the
microprocessor memory contents may be destroyed and
data will be lost. If this switch is installed or replaced in
the field, the wiringharness MUST be attached to the
circuit board as shown on page 15, with the notched side
of the connector facing in.
connecting handheld or lap top computer
The LCR is capable of interfacing to a handheld or lap
top computer. In such cases, the optional RS-232 to
RS-485 Converter is connected to terminal block J2, Pins
24 and 25, as shown on page 15. The computer, in turn,
is connected to the D-connector in the Converter.
NOTE : When a handheld or lap top computer is used to
interface to the LCR, the LCR must be configured for the
RS-485 communication protocol. This can be
accomplished either by means of the selector switch
(described above), or by means of selecting the
appropriate jumper setting at terminal J10 on the LCR
circuit board. Refer to the figure on page 14 for details.
connecting auxiliary outputs (optional)
Aux 1, terminal block J12, Pin 44
: This signal can be
turned OFF, ON, or ON when the LCR enters the RUN
state. It remains OFF, ON, or ON until the LCR ends the
delivery. See LCR Set-up Manual for programming
options.
Aux 2, terminal block J12, Pin 43 : This signal can be
turned on when the LCR enters the reverse flow state. It
remains off during forward flow. Optionally, it can can
function like Auxiliary Output 1. See LCR Set-up Manual
for programming options.
Pulse, terminal block J12, Pin 42 : This output
represents the gross delivery quantity if the LCR is making
an uncompensated delivery. The output represents net
delivery quantity if the LCR is equipped with the
temperature compensation option and the system has
been configured for net delivery. This is a real time 50/
50 duty cycle output representing the least significant
digit of LCR totalizers.
DN/UP Counts, Terminal Block J12, Pins 39 and 40 :
These signals are duplicates of the signals sent to the
LCR counter via connector J7. They can be used to
integrate an additional counter into the system. These
outputs are used to control the 6-digit LCD local display.
The up and down counters are pulsed so that the counter
displays the gross delivery quantity, or net delivery
quantity if compensated. Pulses are active low and are
approximately 5 μsec in duration. The LCD counter is
reset by turning on both outputs for 0.01 second. Refer
to table on page 18 for wiring connection instructions for
Auxiliary outputs, pulse outputs, and DN/UP count
outputs.