Toptech MultiLoad III User manual

MultiLoad III / RCU III
DIVISION 2 (DIV2) Hardware
(Loaded with MultiLoad II+ / RCU II+ Firmware)
Installation Guide
MAY 26, 2023

2MultiLoad III/RCU III Hardware - Division 2 (DIV2) Installation Guide
TOPTECH SYSTEMS
MultiLoadIII/RCUIIIDivision2(DIV2)Hardware
InstallationGuide
(LoadedwithMultiLoadII+/RCUII+Firmware)
1124 Florida Central Parkway
Longwood, FL 32750
USA
Phone [phone]
Copyright Notice
Copyright © 2006 - 2023 Toptech Systems, Inc. All Rights Reserved.
The information contained in this document is proprietary and confidential. No part of this document may be copied, reproduced, or
transmitted in any medium without the express written permission of Toptech Systems, Inc.
Disclaimer
Toptech Systems assumes no responsibility for damages resulting from installation or use of its products. Toptech Systems will not be liable
for any claims of damage, lost data, or lost time as a result of using its products.
EU Declaration of Conformity
The signatory, representing the manufacturer, declares that the products listed below are in conformity with the essential requirements of
the following EC Directive(s) when installed in accordance with the product installation instructions:
2014/32/EU The Measuring Instruments Directive (and its amending directives)
2014/30/EU The Electromagnetic Compatibility Directive (and its amending directives)
2014/34/EU The Potentially Explosive Atmospheres Directive (and its amending directives)

3MultiLoad III/RCU III Hardware - Division 2 (DIV2) Installation Guide
Product: Operator Interface/Process Control Equipment intended for use in potentially explosive
atmospheres
Model name/number: MultiLoad III DIV2 (MID, YES), RCU III DIV2 (MID, NO)
Protective Systems: Nonincendive ‘ec ic’
Notified Body(ies)
NMi Certin B.V., Number 0122
Hugo de Grootplein 1
3314 EG Dordrecht
The Netherlands
Conformity has been demonstrated with reference to the following documentation:
(ATEX) EC test report for Project 06NK12831, Dated 2007-01-31
(MID) EC type-examination certificate TC7311
Compliance with the Essential Health and Safety Requirements has been assessed by reference to the following standards:
WELMEC guide 8.8 General and Administrative Aspects of the Voluntary System of Modular Evaluation of Measuring
Instruments under MID
OIML R117-1:2007(E) Dynamic measuring systems for liquids other than water
EN 61000-6-4: 2007 Generic emissions for industrial operating environments
EN 61000-6-2: 2005 Generic immunity for industrial operating environments
EN 60079-0: 2012 Explosive atmospheres Part 0: Equipment—General requirements
EN 60079-7: 2015 Explosive atmospheres Part 7: Equipment protection by increased safety «e»
EN-60079-11: 2012 Explosive atmospheres Part 11: Equipment protection by intrinsic safety "i"
Year of CE Marking: 2023
Name: William J. Porthouse Position: Director of Engineering & Production Date: June-2023
Name Plate

4MultiLoad III/RCU III Hardware - Division 2 (DIV2) Installation Guide
TableofContents
OVERVIEW..................................................................................................................................... 3
CHAPTER 1 GENERAL INFORMATION & WARNINGS .......................................................... 5
Receiving and/or Returning Equipment ..............................................................................................5
Safety Warnings.....................................................................................................................................6
Electrostatic Discharge (ESD) Protection ...........................................................................................8
FCC Note.................................................................................................................................................8
CHAPTER 2 OPERATING CONDITIONS AND COMPONENTS............................................... 9
Product Outline and Dimensions .........................................................................................................9
MultiLoad III/RCU III DIV2 Hardware Picture...................................................................................9
MultiLoad III/RCU III DIV2 Hardware Dimensions ........................................................................ 10
2.1.2.1 Front View ..................................................................................................................................... 10
2.1.2.2 Back View...................................................................................................................................... 11
2.1.2.3 Bottom View.................................................................................................................................. 12
2.1.2.4 Left Side View ............................................................................................................................... 14
2.1.2.5 Right Side View............................................................................................................................. 15
Operating Characteristics .................................................................................................................. 16
CHAPTER 3 INSTALLING THE MULTILOAD III/RCU III DIV2 HARDWARE................... 17
Tools Required.................................................................................................................................... 17
Installation..................................................................................................................................... 17
Servicing and Repair..................................................................................................................... 17
Cover Closure and Bolt Replacement............................................................................................... 17
Cable Entries ....................................................................................................................................... 17
Mounting the MultiLoad III/RCU III DIV2 Hardware Enclosure........................................................ 17
Metal Plate or Rail......................................................................................................................... 18
Wood............................................................................................................................................. 18
Concrete or Cinder Block Walls .................................................................................................... 18
Mounting Height Considerations................................................................................................... 18
Recommended Wire Sizes and Torque for All Terminal Blocks .................................................... 20
Electrical Supply Connections .......................................................................................................... 20
Mains Supply Connection ............................................................................................................. 21
Equipment Grounding ................................................................................................................... 21
Equipment Battery......................................................................................................................... 22

5MultiLoad III/RCU III Hardware - Division 2 (DIV2) Installation Guide
CHAPTER 4 DATA COMMUNICATIONS INTERFACE ........................................................... 23
Available Communications Protocol Selection and Wire Spec ..................................................... 24
Ethernet......................................................................................................................................... 24
RS-422/485................................................................................................................................... 24
RS-232.......................................................................................................................................... 25
Communication Connection Wiring.................................................................................................. 26
Ethernet –Host/TMS Communications......................................................................................... 26
Serial FCM I/ FCM II Communications, COM 0, RS485............................................................... 27
Serial Host/TMS Communications................................................................................................ 28
4.2.3.1 COM 1 - RS-485 4-wire - Host/TMS Communications ................................................................. 28
4.2.3.2 COM 1 - RS-485 2-wire - Host/TMS Communications ................................................................. 29
4.2.3.3 COM 1 - RS-232 - Host/TMS Communications ............................................................................ 30
Host Ticket Printer/Data Logger.................................................................................................... 30
4.2.4.1 COM3 –RS232 - Host Ticket Printer/Data Logger....................................................................... 31
4.2.4.2 COM3 –RS232 –PTB Protocol Host Ticket Printer/Data Logger................................................ 32
CHAPTER 5 CONNECTING FIELD DEVICES TO INTERNAL FCMS..................................... 33
CHAPTER 6 CONFIGURATIONS ............................................................................................ 34
Weights and Measures Switch Access Control............................................................................... 34
External Switch Access Control (MultiLoad III Hardware Only).................................................... 34
Field Switch Access Control.......................................................................................................... 35
Keypad ................................................................................................................................................. 35
Menus and Screens ............................................................................................................................ 36
Field Modification and Data Entry..................................................................................................... 36
MultiLoad II+/RCU II+ Firmware Preliminary Configuration............................................................ 39
Verifying Communications with FCMs. ............................................................................................ 43
Using I/O Diagnostics......................................................................................................................... 45
CHAPTER 7 SERVICE AND REPAIR....................................................................................... 46
Overview and Subassemblies............................................................................................................ 46
Main Board Replacement ................................................................................................................... 48
Display Subassembly Replacement.................................................................................................. 49
Keypad Barrier Replacement............................................................................................................. 52
Card Reader Replacement ................................................................................................................. 53
FCM Power Supply Replacement ...................................................................................................... 54

6MultiLoad III/RCU III Hardware - Division 2 (DIV2) Installation Guide
Keypad Replacement.......................................................................................................................... 55
Mounting Feet Installation.................................................................................................................. 57
Cover Replacement............................................................................................................................. 58
Overview Parts List and Part Numbers............................................................................................. 61
CHAPTER 8 REVISION HISTORY .......................................................................................... 62
Hardware Revision.............................................................................................................................. 62
Manual Revision.................................................................................................................................. 62

2MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
TableofFigures
FIGURE 2.1 MULTILOAD III/RCU III DIV2 HARDWARE 9
FIGURE 2.2 UNIT OUTLINE DRAWING –FRONT VIEW 10
FIGURE 2.3 UNIT OUTLINE DRAWING –BACK VIEW 11
FIGURE 2.4 UNIT OUTLINE DRAWING –BOTTOM VIEW -2 HOLE BASE 12
FIGURE 2.5 UNIT OUTLINE DRAWING –BOTTOM VIEW - 5 HOLE BASE 13
FIGURE 2.6 UNIT OUTLINE DRAWING –LEFT SIDE VIEW 14
FIGURE 3.1 SUGGESTED MOUNTING POSITION 19
FIGURE 3.2 SCREEN VISIBLE AREA 19
FIGURE 3.3 MULTILOAD III/RCU III DIV2 HARDWARE MAIN BOARD POWER CONNECTOR (TB1) 21
FIGURE 3.4 MULTILOAD III/RCU III DIV2 HARDWARE MAIN BOARD BATTERY (BT1) 22
FIGURE 4.1 MULTILOAD III/RCU III DIV2 HARDWARE MAIN BOARD COMMUNICATION CONNECTORS 23
FIGURE 4.2 ETHERNET CONNECTIONS 26
FIGURE 4.3 FCM CONNECTIONS 27
FIGURE 4.4 RS485 4-WIRE, HOST TO A SINGLE MULTILOAD III/RCU III DIV2 HARDWARE (RECOMMENDED) 28
FIGURE 4.5 RS485 4-WIRE, HOST TO MULTIPLE MULTILOAD III/RCU III DIV2 HARDWARE UNITS 28
FIGURE 4.6 RS485 2-WIRE, HOST TO A SINGLE MULTILOAD III/RCU III DIV2 HARDWARE UNIT 29
FIGURE 4.7 RS485 4-WIRE, HOST TO MULTIPLE MULTILOAD III/RCU III DIV2 HARDWARE UNITS 29
FIGURE 4.8 RS232, HOST TO A SINGLE MULTILOAD III/RCU III DIV2 HARDWARE UNIT 30
FIGURE 4.9 RS232, HOST TO MULTIPLE MULTILOAD III/RCU III DIV2 HARDWARE UNITS 30
FIGURE 4.10 TICKET PRINTER / DATA LOGGER CONNECTIONS WITH HANDSHAKE 31
FIGURE 4.11 TICKET PRINTER / DATA LOGGER CONNECTIONS WITHOUT HANDSHAKE 31
FIGURE 4.12 PTB PRINTER CONNECTION WITH HANDSHAKE 32
FIGURE 4.13 PTB PRINTER CONFIGURATION 32
FIGURE 6.1 W&M BOLT SWITCH 35
FIGURE 7.1 MULTILOAD III / RCU III DIV2 HARDWARE UNIT 46
FIGURE 7.2 SUBASSEMBLY IDENTIFICATION 47
FIGURE 7.3 MAIN BOARD ASSEMBLY REMOVAL 48
FIGURE 7.4 DISPLAY ASSEMBLY REMOVED FROM THE MOUNTING BRACKET 50
FIGURE 7.5 REMOVAL OF KEYPAD BARRIER 52
FIGURE 7.6 EXPLODED VIEW OF CARD READER 53
FIGURE 7.7 REMOVAL OF FCM POWER SUPPLY 54
FIGURE 7.8 KEYPAD ASSEMBLY INSTALLATION PREP 56
FIGURE 7.9 MOUNTING FEET ASSEMBLY 57
FIGURE 7.10 DISCONNECT DISPLAY AND KEYPAD CABLES 58
FIGURE 7.11 INSTALL TOP RIGHT SCREW AND REMOVE LOWER HINGE KNUCKLE. 59
FIGURE 7.12 REMOVE TOP RIGHT SCREW AND LIFT COVER OFF. 60

3MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
Overview
This document is designed to guide individuals installing MultiLoad III/RCU III DIV2 Hardware equipment,
engineering firms developing site electrical drawings, and users troubleshooting system operations such as
managers, system administrators, technicians, andmeter proving personnel.
The following table provides aninformative summary of the material available in this guide:
Chapter
Topics Covered
1.General Information and Warnings
This chapter reviews safety and compliance information, as well as
instructions for receiving and returning products.
2.Operating Conditions & Components
This chapter covers product outline and dimensions, as well as
operating characteristics of the unit.
3.Installing the MultiLoad III/RCU III DIV-
2 Hardware
This chapter covers installation considerations and instructions for
the MultiLoad III/RCU III DIV2 Hardware.
4.Data Communication Interface
This chapter reviews hardware connections andcommunication
processes.
5.Connecting Field Devices to the
Internal I/O Board
This chapter covers the available I/O points per board, the
terminal arrangements per board, and then describes in detail
how to connect different field devices to the internal I/O Board.
6. Configurations
This chapter describes how to navigate the system, select field
values, perform data entry, and toggle options on and off.
7. Service and Repair
This chapter describes how to service and repair the MultiLoad
III/ RCU III DIV2 Hardware subassemblies and parts.
8. Hardware Revision History &
Compatibility
This chapter provides changes, modifications,and updates to the
hardware.
9. Revision History
This chapter provides further hardware revisions as well as revisions
made to this document.

4MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
The following keys allow the user to locate information needed in this guide:
ICON KEY
Important information to enhance understanding and make better use of the product.
Indicates potential damage to hardware or loss of data.
Potential for property damage or that personal injury may occur. Pay close attention and
follow instructions when this symbol is displayed.
Typographical Conventions:
Boldface: Indicates what is pressed on the keypad. Example: Key in 00000.
Italics: Emphasizes a key product or industry term.
Example: the display features a pick-list style of item selection.
This guide covers RCU III/MultiLoad III DIV2 Hardware installation information only. For information about
base MultiLoad firmware, please consult the MultiLoad II+ Firmware User Guide. For information about base
RCU firmware, please consult the RCU II+ Firmware User Guide. For information about wiring other models,
please consult the respective installation guides. For information about the MultiLoad register interface and
Modbus communication, please reference the MultiLoad II Communication Guide. Updated versions of all
manuals, including this one, are available on our website at http://www.toptech.com.

CHAPTER 1–GENERAL INFORMATION & WARNINGS
5MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
Chapter 1 General Information & Warnings
Receiving and/or Returning Equipment
At receipt, the MultiLoad III/ RCU III DIV2 Hardware should be immediately inspected after opening the
packaging case. If any damage is visible, notify the carrier at once to establish liability.
Contact Toptech’s Return Materials Department to initiate timely repair or replacement of the unit.
A Return Materials Authorization (RMA) will be for the purpose of returning the product or parts
requiring repair. Do not return any material to Toptech without an RMA.
Contact Information for Americas:
Return Materials Department
Toptech Systems, Inc.
1124 Florida Central Pkwy
Longwood, FL 32750 USA
[phone]
Contact Information for EMEA and Asia:
Return Materials Department
Toptech System NVs
Nieuwe weg 1- haven 1053
2070 Zwijndrecht, BELGIUM
[phone]
Chapter
1

CHAPTER 1–GENERAL INFORMATION & WARNINGS
6MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
Safety Warnings
NORTH AMERICAN INSTALLATIONS:
▲This equipment is suitable for use in Class I, Division 2, Groups C and D locations, OR non-
hazardous locations.
▲WARNING: EXPLOSION HAZARD. Do not disconnect equipment unless power has been
removed or the area is known to be non-hazardous.
▲WARNING: EXPLOSION HAZARD. Substitution of components may impair suitability for
Class I, Division 2.
▲WARNING: EXPLOSION HAZARD. The area must be known to be non-hazardous before
servicing/replacing the unit and before installing.
▲CAUTION: Battery may explode if mistreated. DO NOT RECHARGE, DISASSEMBLE, OR
DISPOSE OF IN FIRE.
▲CAUTION: Field wiring must have a temperature rating of +75 °C or greater. Use copper
wire only.
▲A battery is installed into the main board for retention of time and date only. This battery should
last more than ten years. This battery can be replaced by the end user but must be
replaced with Matsushita Electric, model BR2032 only. Use of another battery may
present a risk of fire or explosion.
▲The installation of this product must be in conformity with NFPA 70 (US National Electric Code)
or CSA C22.1 (Canadian Electrical Code) as appropriate.
INSTALLATIONS NORD-AMÉRICAINES (FRANÇAIS)
▲Cet équipement est compatible pour une installation en Classe I, Division 2, Groupes C & D ou
les emplacements non dangereux..
▲AVERTISSEMENT: RISQUE D'EXPLOSION. Avant de déconnecter l’ équipement, couper
le courant ou s’assurer que l’emplacement est designe non dangereux.
▲AVERTISSEMENT: RISQUE D'EXPLOSION. La substitution de composants peut render
ce materiel inacceptable pour les emplacements de Classe I, Division 2.
▲AVERTISSEMENT: RISQUE D'EXPLOSION. Avant réparer ou remplacer l’équipement et
avant d’installer s’assurer que l’emplacement est designe non dangereux.
▲PRUDENCE: La pile peut exploser si elle est maltraitée. NE PAS RECHARGER, NE PAS
DÉMONTER, ET NE PAS JETER DANS LE FEU.
▲PRUDENCE: Câblage de terrain doit avoir un classement de température de +75 °C ou
plus. Utilisez uniquement du fil de cuivre.
▲Une batterie est installée dans la carte principale pour la conservation de l'heure et de la date
uniquement. Cette batterie devrait durer plus de dix ans. Cette batterie peut être remplacée
par l'utilisateur final mais doit être remplacée par Matsushita Electric, modèle BR2032
uniquement. L'utilisation d'une autre batterie peut présenter un risque d'incendie ou
d'explosion.
▲L’installation de ce produit doit se conformer avec le Code National d'Électricité, NFPA 70 ou le
Code Canadien d'Électricité, CSA C22.1 comme appropriée.

CHAPTER 1–GENERAL INFORMATION & WARNINGS
7MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
ATEX AND IECEX INSTALLATIONS:
▲This equipment is suitable for use in EX Zone 2 Group IIB Locations, OR non-hazardous
locations.
▲WARNING: Do not open when an explosive atmosphere may be present.
▲WARNING: Do not disconnect equipment unless power has been removed or the area is
known to be non-hazardous.
▲WARNING: EXPLOSION HAZARD. The area must be known to be non-hazardous before
servicing/replacing the unit and before installing.
▲CAUTION: Battery may explode if mistreated. DO NOT RECHARGE, DISASSEMBLE, OR
DISPOSE OF IN FIRE.
▲CAUTION: Field wiring must have a temperature rating of 75 °C or greater. Use copper
wire only.
▲A battery is installed into the main board for retention of time and date only. This battery should
last more than ten years. This battery can be replaced by the end user but must be
replaced with Matsushita Electric, model BR2032 only. Use of another battery may
present a risk of fire or explosion.
▲The installation of this product must be in conformity with IEC/EN 60079-14.

CHAPTER 1–GENERAL INFORMATION & WARNINGS
8MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
Electrostatic Discharge (ESD) Protection
The MultiLoad III/ RCU III DIV2 Hardware contains electronic components and assemblies subject to
damage by ESD. The MultiLoad III/ RCU III DIV2 Hardware was designed to protect against ESD while
the unit is closed and in normal operation. Proper handling procedures must be observed during the
removal, installation, repair and other handling of printed circuit board assemblies, electronic devices,
and components. This includes:
1) Service to be performed by authorized personnel only.
2) The person performing the service must be grounded by an ESD grounding strap and
connected to ground.
3) While performing maintenance or repair, touch an unpainted metal of the MultiLoad III/RCU
III DIV2 Hardware surface prior to touching or handling any printed circuit boards or
electronic components.
4) Printed circuit board assemblies must be placed in and transported in conductive bags or
other conductive containers.
5) Printed circuit boards must not be removed from the conductive container until time of use.
6) All other “best” practices for protecting devices from ESD must be observed.
FCC Note
This equipment complies with the limits for a Class A Digital Device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct the
interference at their expense.
Modifications not approved by the manufacturer could void the user's authority to operate the
equipment under FCC rules.

CHAPTER 2–OPERATING CONDITIONS AND COMPONENTS
9MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
Chapter 2 Operating Conditions and Components
Product Outline and Dimensions
MultiLoad III/RCU III DIV2 Hardware Picture
Figure 2.1 MultiLoad III/RCU III DIV2 Hardware
Chapter
2

CHAPTER 2–OPERATING CONDITIONS AND COMPONENTS
10 MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
MultiLoad III/RCU III DIV2 Hardware Dimensions
The dimensions in this section are indicated in inches and millimeters (in parenthesis).
2.1.2.1 Front View
Figure 2.2 Unit Outline Drawing –Front View

CHAPTER 2–OPERATING CONDITIONS AND COMPONENTS
11 MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
2.1.2.2 Back View
Figure 2.3 Unit Outline Drawing –Back View

CHAPTER 2–OPERATING CONDITIONS AND COMPONENTS
12 MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
2.1.2.3 Bottom View
2.1.2.3.1 5-Hole Base
2 x 1” NTP Aluminum HUBS
3 x 3/4” Hole Plugs (3/4” NTP Aluminum HUBS Customer Supplied)
Figure 2.4 Unit Outline Drawing –Bottom View -2 Hole Base

CHAPTER 2–OPERATING CONDITIONS AND COMPONENTS
13 MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
2.1.2.3.2 7- HoleBase(Europe)
7 xM20 x 1.5
Figure 2.5 Unit Outline Drawing –Bottom View - 5 Hole Base

CHAPTER 2–OPERATING CONDITIONS AND COMPONENTS
14 MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
2.1.2.4 Left Side View
Figure 2.6 Unit Outline Drawing –Left Side View

CHAPTER 2–OPERATING CONDITIONS AND COMPONENTS
15 MultiLoad III/RCU III DIV2 Hardware Installation Guide - Part # 6074
2.1.2.5 Right Side View
Figure 2.7 Unit Outline Drawing –Right Side View