Dover Civacon ROM III User manual
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Revision1.2ROMIII“‐L”&“‐LIQ”Installation&OperationManualPageNo.1of15
Civacon ROM III
Overfill Detection & Retained Product
Monitor (Left-to-Right)
Model Series: 3308-L & 3308-LIQ
Installation & Operations Manual
Manual Rev. 1.2
PART NUMBER
H53265PAL
June 2019
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Contents
1.Product Description ............................................................................................................................ 4
2.General Specifications ....................................................................................................................... 5
3.Intrinsic Safe Specifications ............................................................................................................. 5
4.Top Only ROM III Onboard Monitor ................................................................................................... 6
5.The Reset Switch ................................................................................................................................ 7
6.Mounting Instructions ........................................................................................................................ 7
6.1Housing Mounting Instructions ................................................................................................. 7
6.1.1Housing External Ground Stud .......................................................................................... 8
6.2Module Mounting Instructions .................................................................................................. 9
6.2.1 Replacing Module in Older ROM II Housing .......................................................................... 9
6.2.2 Replacing a (this) 3358-L Module .......................................................................................... 9
7.Wiring Instructions ........................................................................................................................... 10
7.1The Wire ..................................................................................................................................... 10
7.2Power .......................................................................................................................................... 10
7.3Sensors & OBM ......................................................................................................................... 12
7.4Auxiliary Inputs .......................................................................................................................... 13
7.5Sockets ...................................................................................................................................... 13
8.Product Care ..................................................................................................................................... 14
9.Warranty ............................................................................................................................................ 14
10.Technical Assistance .................................................................................................................... 15
Table of Figures
Figure 1: Mounting / Wire Entry – Models 3308-L and 3208-LIQ / 3308R-L & 3308R-LIQ ............ 8
Figure 2: Front Window Graphics for “-L” and “-LIQ” Versions ............................................................ 9
Figure 3: Power and Auxiliary Wiring .................................................................................................... 11
Figure 4: 6 Compartment Wiring ........................................................................................................... 12
Figure 5: 8 Compartment Wiring ........................................................................................................... 12
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1. Product Description
We’ve put together this manual to help you understand how to operate and install ROM III, a
Retain Overfill Monitor system that is tank/trailer mounted. In compiling this manual, we
sought the advice of people we consider to be authorities on safe operation: those with
actual field experience. We hope that their knowledge, coupled with our technical
information, will allow you to install your system both safely and effectively. If you do run in to
any questions or concerns, our technical support team will be glad to assist you.
The ROM III is a tank truck / trailer mounted On Board Monitoring (OBM) system with sensor
mounted in the top and bottom of each tank compartment. The ROM III monitor detects and
communicates a pending overfill condition to a loading rack control monitor, and signals
which tank compartment is overfilled. The ROM III monitor also detects and communicates a
retain condition to a loading rack control monitor. This control system will enable a tank
truck / trailer to load at API optic, thermistor or float petroleum loading rack monitors while
using only two wire optic sensors. If all of the optic sensors do not detect any liquids, the
monitor provides the necessary signal information to the appropriate API sockets to enable
loading of the tank trailer truck. The ROM III Onboard Monitor has been designed for use with
any CIVACON 2-Wire Overfill and Retain Sensors.
The ROM III on board monitor includes some additional new features and benefits when
compared to its predecessor the ROM II. These include:
A. Support for tanks with up to 8 compartments using 2-wire overfill and retain
sensors.
B. 2 relay contacts one I.S. and one NON I.S.
C. Aux Out is now tied to the top sensors only. For use with optional Indicator light.
D. Low power indication
MODELS of ROM III Include:
#3308-L – ROM III, with Left-to Right Reading LEDs
#3308R-L – ROM III, for Retained Reset Switch,
with Left-to-Right Reading LEDs
#3308-LIQ – Liquip Branded ROM III, with Left-to-Right Reading LEDs
#3308R-LIQ – Liquip Branded ROM III, for Retained Reset Switch,
with Left-to-Right Reading LEDs
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2. General Specifications
Parameter Minimum
Maximum Units
Input Voltage 9 30 VDC
Input Current 1 A
Ambient Operating Range -40° +70° Celsius
Storage Temperature -40° +70° Celsius
Max. Surface Temperature +135° Celsius
NON I.S. Relay (TB1) Voltage 30 V
NON I.S. (TB1) Relay Current 5 A
I.S Aux Out (TB4) Voltage 20 V
I.S Aux Out (TB4) Current 50 mA
Altitude 2000 M
Humidity 100%
The ROM III is rated for outdoor use having an overvoltage category code I and pollution
degree 2 according to UL 61010-1 standard.
3. Intrinsic Safe Specifications
This section is agency controlled, hence shall not be changed without permission of agency.
The ROM III has been assessed by compliance with the following documents:
EN IEC 60079-0: 2018 EN 60079-11: 2012 EN 60079-15: 2010
Equipment Label Marking:
Description of Equipment or Protective System:
General - The ROM III is a tank truck / trailer mounted On Board Monitoring (OBM) system
providing intrinsically safe connections for sensors mounted in the top and bottom of each
tank compartment. The ROM III monitor detects and communicates the sensor status and
overall unit’s “permissive to load” (the tanker) status to a loading rack monitor via its socket
outputs. The ROM III is powered by connection to the truck battery. The Model #1910A ROM
Terminator is used to terminate the unused sensor input circuits.
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Construction - The monitor is housed in a rectangular aluminum box enclosure with six ½
NPT threaded entries and a windowed cover held in place by six bolts. There are two circuit
boards (Base board and Top board), the boards are encapsulated with only the wiring
terminals and signal LEDs protruding from the encapsulation. The input terminals are
separated from the intrinsically safe terminals by a metal partition. There on certain
installations, there may be also a small encapsulated Model #1910A 2-Wire Terminator.
This “terminator”, is used to terminate the unused sensor input circuits. It is typically installed
vertically inside the ROM III enclosure at the lower left corner.
circuit board the 1910 Terminator. The 1910 is mounted inside the ROM III enclosure and is
used terminate the end of a string of output circuits. The Model #1910A 2-Wire
Terminator is typically installed vertically inside the ROM III enclosure at the lower left
corner
Ratings - The ROM III operating voltage is 9 – 30 Vdc, 1A. The ROM III is rated for use in an
ambient temperature range of -40°C to +70°C.
Entity Parameters: TB2
Uo (Voc ) = 11.8V, Io (Isc ) = 36.2mA, Po = 110mW, Co (Ca ) = 400nF, Lo (La ) = 3.8mH
Vt = 11.8 V, It = 185 mA, Po = 0.546W, Co (Ca ) = 400nF, Lo (La ) = 3.8mH
Entity Parameters: TB3 (only one type connection can be used at one time)
Float Connections: Ui (VMAX) = 20V, Ii (IMAX) = 450mA, Pi = 1.0W, Ci = 0uF, Li = 0mH
Therm Connections: Ui (VMAX) = 20V, Ii (IMAX) = 250mA, Pi = 1.0W, Ci = 0uF, Li = 0mH
Optic Connections: Ui (VMAX) = 20V, Ii (IMAX) = 250mA, Pi = 1.0W, Ci = 0uF, Li = 0mH
Entity Parameters: TB4
AUX 1, 2, 3: Uo (Voc ) = 30 V, Io (Isc ) = 2.5mA, Po = 19 mW, Co (Ca ) = 400nF, Lo (La ) = 1.9H
AUX 1, 2, 3: Vt = 30 V, It = 7.5 mA, Po = 0.546W, Ca = 400nF, La = 1.9H
AUX OUT: VMAX = 20 V, IMAX = 50mA, Ci = 0nF, Li = 0mH
Specific Conditions of Use:
The enclosure is a potential electrostatic hazard. To prevent the risk of electrostatic sparking,
the surface should only be cleaned with a damp cloth.
4. Top Only ROM III Onboard Monitor
The ROM III monitor can be configured for top only (overfill) operation. A terminal block
connection is provided to disable the retain (bottom) circuitry. Top only ROM III configuration
will provide the advantages of 2 wire sensors and advanced diagnostics with the ability to
install retain sensors at a later date. This terminal block is located at the top of the unit, and
is labeled TB4A. A jumper wire is installed between the terminals to DISABLE the retain
(bottom) circuitry. It is pre-wired at the factory if the proper system is ordered. DO NOT
connect anything to the retain (bottom) sensor terminals.
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5. The Reset Switch
If using retain sensors you will need a reset switch. If this option is ordered the reset switch
will come installed. The reset switch is to reset the 40-minute timer.
6. Mounting Instructions
6.1 Housing Mounting Instructions
The CIVACON Onboard Monitor has four (4) flanges with holes, at the base of its cast
aluminum housing, used for mounting the enclosure. These are provided so that it may be
securely bolted to a grounded metal portion of the trailer that will provide an excellent
physical support to the monitor. Locate the monitor in an area that is visible to the operator
near the sockets and bottom loading adapters. The holes on the enclosure are 5/16 inch
diameter. Refer to Figure 1 & 2 for dimensional mounting information. Mounting dimensions
are given in inches. To protect the electronics in the housing, keep the monitor lid on the
enclosure until you are ready to wire the monitor. The housing provides seven (7) ½" NPT
access holes (refer to Figure 1 & 2). These holes provide for easy wiring access to the
desired locations of the monitor. The three (3) holes on the right side of the monitor are
used for wiring to the sockets and reset switch. The two (2) located on the left side of the
monitor are used for wiring the 12/24 volt power and auxiliaries. The holes along the bottom
are used for the overfill (top) and retain (bottom) sensors. Any holes that are not used
should be properly sealed with pipe plugs, provided with the enclosure. Once the housing is
installed, you are ready to remove the cover frame, gasket, and window; and begin the wiring
procedure.
There is only one NPT hole provided to bring the NON-intrinsically safe power wiring
into the enclosure. The remaining six (6) NPT holes are used for intrinsically safe
signals and wiring. This convention MUST be complied with!
DO NO
T
open when an explosive atmosphere is present
DO NOT connect a battery charger or other pulsed power supply to this monitor as this
may permanently damage the monitor
DO NOT perform any welding on the tanker when power is applied to this monitor, as
welding on the tanker with the monitor power on may permanently damage the monitor
DO Read through this manual before installing any equipment, both for your safety and
that of your customer.
THE MONITOR’S MOUNTING LOCATION IS CLASSIFIED FOR USE IN A
CLASS I, DIV. 2, GROUP C & D / Zone 1 IIB HAZARDOUS LOCATION
OR SAFE AREA.
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6.1.1 Housing External Ground Stud
The CIVACON Onboard Monitor Housing has an M6 External Ground Stud. This Ground Stud
is used to connect an APPROVALS REQUIRED #14 AWG (1.5 mm) External Ground Wire
between the Monitor Housing and Chassis Ground on the tanker. It is suggested that this
wire have a Green (or Green with Yellow Stripe) for proper identification as a “chassis
ground” connection. Tighten the Ground Stud Nut to 5.6 ft-lbs (7.6 N-m).
Figure 1: Mounting / Wire Entry – Models 3308-L and 3208-LIQ / 3308R-L & 3308R-LIQ
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Models 3308-L and 3208R-L Models 3308-LIQ & 3308R-LIQ
Figure 2: Front Window Graphics for “-L” and “-LIQ” Versions
6.2 Module Mounting Instructions
6.2.1 Replacing Module in Older ROM II Housing
Remove the old module place the 4 standoffs that came with the 3358-3358
module in the 4 holes that the screw of the 3252-3252 came out of. Place
module in the box and screw the module down.
6.2.2 Replacing a (this) 3358-L Module
Unscrew the 4 screw and remove the module. Replace with new module and
screw down the new module.
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7. Wiring Instructions
7.1 The Wire
All wiring entering the monitor must enter through the appropriate access openings
shown in Figure 1. Use weather tight strain reliefs or liquid-tight fittings to keep out
external moisture. The use of weather tight strain reliefs with the sensor and socket
housings is also imperative for a moisture resistant system. We require the use of a
high quality stranded and tinned copper wire with a minimum thickness of 20 gage
and min. temperature wire insulation greater than 70°C for all electrical connections
to the monitor. Trim about ¼" of the insulation off the end of each wire that will be
connected to the terminal strips of the monitor. Insert the trimmed wire into its
appropriate slot on the terminal strip and tighten the screw on top of that slot.
Ensure that NO strands of wire have separated from the connection that could cause
a potential short with an adjacent terminal. Due to the vibrations that can occur on a
trailer, it is extremely important to double check all wiring connections for good
mechanical integrity. The proper color code of the wires will save time and money on
the installation and on any troubleshooting, which may be required in the future.
CIVACON Model 2300 cable (Part # 97701) is a seven (7) conductor or Model 7215-
7215 (Part # 97702) is a ten (10) conductor color coded cable which is highly
recommended for use with the installation of CIVACON ROM III overfill prevention
equipment. CIVACON also makes a Model 2100 cable (Part # 97750) that is a five
(5) conductor color coded cable which may be used with the socket installations.
NOTE: The proper tightening torque value for each electrical connector screw (per
the manufacturer’s specifications) is 4.45 to 5.30 in- lbs. (0.05 to 0.06 N-m). Please
observe these values when tightening of wires into each connection terminal on
ROMIII
7.2 Power
Do not apply power to the monitor without reading this manual and thoroughly
checking all connections. Measure the truck / trailer system voltage. The monitor is
designed to operate from 9 to 30 Volts DC, negative ground systems, supplied by a
battery. If your voltage measurement is not within this range, contact CIVACON
before installing the monitor. Power from battery chargers or other pulsed power
supplies may permanently damage the monitor. If the power wires pass through a
Class I, Division 2, Group D area, the wire type must be suitable for this use. The
monitor's power supply circuit should contain a switch and an inline fuse with a
maximum current rating of 1/2 Amp. It could be located in the nose box, and an
inline switch located in the truck cab so that the overfill system can be turned off
when the truck is out of service. This may also be accomplished with an appropriate
SAFETY FIRST!! POWER MUST BE OFF WHEN INSTALLING OR REMOVING POWER
LEADS TO THE MONITOR. THE WIRES FOR THE POWER FROM THE BATTERY
MUST BE KEPT SEPARATE FROM THE SENSOR AND SOCKET WIRING! THEY
CANNOT BE RUN TOGETHER IN THE SAME CABLE! This is important to maintain
safe current levels in the intrinsically safe sensors, auxiliary switches, and socket
wiring.
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safety switch and fuse in an equipment cabinet on the trailer. It is recommended
that the power be switched off when not in use (i.e.- When servicing the electrical
system or when driving the vehicle). The wires from the power source should only
enter the OBM enclosure via the proper access opening, which is the upper left hand
opening (refer to Figure 1)
An external junction box, fuse holder, and fuse may be purchased from CIVACON as a
kit product if one is not available locally. Please contact the factory for further
information on this product. This product comes with its' own instruction sheet.
The Relay Output at TB-1 may be used to control a solenoid valve, heavy duty
automotive relay or other similar device, mounted in a safe (ordinary / non-
hazardous) area on the vehicle. This single output signal “pulls to ground” on Permit.
This Non Intrinsically Safe Relay Output Terminal (Relay Output Ground) is limited to
connected loads not to exceed a rating of 30VDC, 5A Max.
Figure 3: Power and Auxiliary Wiring
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7.3 Sensors & OBM
The sensors must be wired according to Figure 3 or 4. The wires from the sensors
should enter the OBM enclosure via the proper access opening (refer to Figure 1).
See the Figure 3 or 4 diagrams for a complete sensor system wiring diagram.
CIVACON has a full color wall chart that is available for the standard ROM III system.
Please contact the factory for a copy. If you are replacing or installing on a truck or
trailer with 6 compartments or less use the 6 compartment wiring in Figure 3. If you
are installing or replacing on a truck or trailer with more than 6 compartments use 8
compartments wiring in Figure 4.
Figure 4: 6 Compartment Wiring
Figure 5: 8 Compartment Wiring
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7.4 Auxiliary Inputs
The AUXILIARY INPUTS are three independent intrinsically safe signal sources
connected to monitoring circuits. These inputs provide a voltage source that when
connected to the COM common terminals, will enable the auxiliary permissive circuit.
This, in addition to the normal overfill permissive circuit, controls the "PERMISSIVE"
state of the module. You must have BOTH circuits permissive before any external
permissive signals are given. Figure 2 shows the connections to Aux terminals, which
is to the left of TB2, the sensor connections. This figure also shows the auxiliary
devices as simple switches. Unused inputs MUST be connected to a COM common
terminal next to itself.
Please remember that these signals are intrinsically safe and cannot be run with any
other wires in a cable. Only the auxiliary wires and their commons can be run
together in a cable.
Any type of simple switch may be used as the switching device. These can be
pressure switches which connect to the airlines to indicate a pressurized line, or an
un-pressurized condition. The switch could also be a micro-switch to indicate the
position of something that moves. In all cases, this switching mechanism cannot be
accidentally connected to a NON-intrinsically safe voltage source. Because of this
low switching current requirement for intrinsically safe circuits, the contact material
on the switching mechanism should be GOLD plated. If corrosive contact materials
are used, then the integrity of the switched signal could be compromised, and not
work reliably all the time. If this contact plating is not available, then the best
possible material should be use, with every effort made to keep the corrosive
atmospheres out of the switching chamber of the device.
Which leads us to the next problem of corrosion, keeping the connections to the
wires free from corrosion. Boots, sealant, junction boxes, or any means must be
used to maintain the integrity of the connection to the switching device. The cables'
integrity to moisture must also be maintained with any exposed internal wires.
Sealing the ends of the cable jacket are suggested, unless the cable enters a
junction box that has strain relief fittings on it to keep the moisture outside of itself.
7.5 Sockets
Access openings are provided at the OBM so that each type of socket used may have
its own access connection only if the auxiliary inputs are not used. If the auxiliary
inputs are used, use the convention shown in Figure 1. It combines the Thermistor
and Float outputs into one cable exit. This convention is not required but will help in
troubleshooting and tracing the system output if a problem should occur. Cross
reference the CIVACON part number of the socket to its proper wiring diagram and
connect accordingly. Please use the CIVACON Instruction Sheet H50200PA, which is
packaged with each socket, for additional reference information on the sockets.
Strain reliefs are recommended for all cable entry locations. Note that pipe plugs are
required to be installed in all of the openings which are not used for cable entry. A
thread sealant is also recommended to be used with each strain relief or pipe plug.
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WARNING!
CIVACON products should be used in compliance with all applicable federal, state,
and local laws and regulations. Product selection should be based on
physical specifications and limitations, compatibility with the
environment, and the material to be handled.
If the product is used in a manner not specified by CIVACON, the protection
provided by the product may be impaired.
CIVACON MAKES NO WARRANTY OF FITNESS
FOR A PARTICULAR USE.
8. Product Care
Clean product only with a damp cloth.
9. Warranty
All CIVACON parts and products are thoroughly inspected and tested from the time the raw
material is received at its plant until the product is assembled. CIVACON guarantees that all
products are free from defects in materials and workmanship for a period of one year from
the date of shipment. Any product that may prove defective within said one year period will,
at CIVACON’s discretion, be promptly repaired or replaced, or credit will be given for future
orders. This warranty shall not apply to any product that has been altered in any way or has
been repaired by any party other than an authorized service representative. The warranty
shall further not apply to a product failure caused by misuse or when the product is used
under conditions for which it was not expressly designed. CIVACON shall have no liability for
labor costs, freight costs, or any other costs or charges in excess of the amount of invoice for
the products.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, AND
SPECIFICALLY, THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR USE.
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10. Technical Assistance
Thank you for choosing CIVACON for your product transportation needs. We appreciate your
business and strive to provide quality customer service and support. If you need any
assistance in installing your product or have further questions, please contact us at the
following numbers:
Technical Assistance in the U.S.A.
If at any time during the installation a question arises that is not covered in this Installation
Instruction, or with any other applicable documents referenced, feel free to call the
OPW/CIVACON – ELECTRONICS TECHNICAL ASSISTANCE LINE:
In the U.S.A., Call 1-800-5 CIVACON. (800-524-8226)
OPW/CIVACON – CUSTOMER SERVICE DEPARTMENT:
In the U.S.A., Call 1-888-526-5657
IN ALL OTHER COUNTRIES: Contact your local OPW/CIVACON agent.
OPW/CIVACON
9393 Princeton Glendale Road
Hamilton, Ohio 45011
PHONE: (816) 741-6600 / TOLL FREE (888) 526-5657
FAX: (816) 741-1061 / TOLL FREE (888) 634-1433
Dear Customer:
We’ve developed this manual to help you with your everyday ROM III needs. We hope you’ll find this
manual both helpful and easy to use.
We appreciate any feedback you can provide to make this manual better for the user. Whether we didn’t
make something as clear as we thought, or even if something is misspelled, please let us know so we can
continuously improve the quality of this manual. Naturally, we would also like to hear from you on the
things you like! Please address your comments to our technical support team.
This document and all the information herein is the property of CIVACON.
It is proprietary and shall not be copied, and is not to be used directly or indirectly
in any way detrimental to the interest of CIVACON.
All copyright and intellectual property rights are reserved.
©2019
9393 Princeton Glendale Road
Hamilton, Ohio 45011 USA
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