Liquid Controls Dual Meter Multiplexer User Manual

Installation Manual

Dual Meter Multiplexer, PN E25352

Installation: EM100-14

Introduction

Publication Updates and Translations

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It is the responsibility of the Local Distributor to provide the most current version of LC Manuals, Instructions, and
Specification Sheets in the required language of the country, or the language of the end user to which the products are
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contact your Local Distributor.

!!

WARNING WARNING

!

WARNING

!!

WARNING WARNING

• Before using this product, read and understand the instructions.

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application, installation, and
maintenance of equipment and/or systems in accordance with all applicable codes and ordinances.

• Failure to follow the instructions set forth in this publication could result in property damage, personal injury,
or death from fire and/or explosion, or other hazards that may be associated with this type of equipment.

This manual provides instructions for the installation of a
Dual Meter Multiplexer with two LCR or LCR-II registers
sharing a single printer.

The registers can be operated as stand alone units.
They can also be operated from a Lap Pad, a Hand Held
computer, or a Laptop computer. For this reason, it is
important to ensure that the multiplexer is set up
according to how it will be operated. This manual
provides installation and setup instructions, it does not
provide operation instructions for devices such as a Lap
Pad, Hand Held, or Laptop computer.

The multiplexer is not a weather proof box. If the unit is to

be used on a fuel delivery vehicle, it must be installed
inside the truck cab in a location where it will not get wet
or stepped on. There are several cables that will be
connected to this device. It is recommended that this
unit be installed in a safe area where the cables cannot
get disconnected or damaged.

This unit is enclosed in a 7” x 2-½” x 7-½” black, metal
box. On the front side of the box there are connections
for a printer and a Lap Pad, Laptop Computer, or a Hand
Held PC. If a Laptop Computer is used, it is plugged into
the same connection used for the Lap Pad. There is a
toggle switch that is used for selecting one register or the
other when using a Lap Pad. When using a computer,
selection is done through software.

Figure 1.1 Dual Meter Multiplexer.

On the rear side of the multiplexer there are two DB25
female connectors where the LCR data cables connect.

There is a terminal block for the DC voltage input to the
box and the DC voltage output to the LCR registers.

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Installation

When looking for the proper place to install the
multiplexer, the unit should be mounted:

• In a place where it will not be exposed to water or

excessive dust.

• In an easily accessible location.

• Where cables cannot be pulled, bent or stepped on.

• Using sturdy metal brackets.

• Close to a good grounding spot.

This will ensure that the unit will not get damaged and
that it is properly grounded.

The following instructions show how to install and set up
the Dual Meter Multiplexer in different configurations,
depending on which device will be used to control the
LCR registers (Lap Pad, Hand Held PC, or Laptop PC).
NOTE: Make sure vehicle is OFF while the following
procedures are being implemented.

STEP 1: SET THE INTERNAL JUMPERS

The Multiplexer box has several jumpers inside that have to be set to a certain position depending on the device that
will be used to setup the registers. Using a 5/64” allen wrench, remove the 8 black, socket head screws and remove
the lid. Using needle nose pliers, set the jumpers to the position required and then replace the lid and tighten the
screws.

Figure 1.2 Multiplexer Internal Jumper Settings.

STEP 2: INSTALL THE MULTIPLEXER AND CONNECT THE PRINTER

Install the multiplexer in it’s final location and make sure it is grounded properly. Next, plug in the data and the
power cable into the front side of the multiplexer. Plug the other end of the cables into the back of the printer.

Figure 1.3 Printer Connection.

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