TIMM ELEKTRONIK EUS-2 Technical Description

H. Timm Elektronik GmbH | Humboldtstr. 29 | 21509 Glinde | GERMANY

OVERFILL PREVENTION CONTROLLER EUS-2

Technical Description | Version 1.81 | English

H. Timm Elektronik GmbH | Humboldtstr. 29 | 21509 Glinde | GERMANY

Table of Content

1. General Information ............................................................................................................................................... 1

2. Functional Principle ............................................................................................................................................... 1

3. Special Features ....................................................................................................................................................... 2

3.1. Compliance to latest European and American Standards ................................................... 2

3.2. Intelligent Explosion Protection .............................................................................................................. 2

3.3. High Functional Safety | Fail Behavior .............................................................................................. 2

3.4. Bright Signal Light ............................................................................................................................................ 2

3.5. Graphic Display .................................................................................................................................................... 2

3.6. Easy Configuration by Joystick ................................................................................................................ 3

3.7. Reliable Ground Verification ...................................................................................................................... 3

3.8. Control Outputs | Data Interface ............................................................................................................ 3

3.9. Extended Area of Application ................................................................................................................... 3

4. Accessories .................................................................................................................................................................. 4

4.1. Coiled Cable ........................................................................................................................................................... 4

4.2. Disconnector Socket ........................................................................................................................................ 4

4.3. Testing Equipment ........................................................................................................................................... 5

5. Technical Specifications ..................................................................................................................................... 6

6. Connection Diagram ............................................................................................................................................. 7

8. International Approvals ...................................................................................................................................... 8

9. Contact us ...................................................................................................................................................................... 1

13.03.2019 | V1.81

1 | 9

Overfill Prevention Controller EUS-2 | Technical Description

[e-mail]
www.timm-technology.de

Figure 1: Bottom loading with overfill prevention control by Timm`s control unit type EUS-2

1. General Information

As stationary part of the Overfill Preven­tion System for liquid fuels, the explosion­proof control unit type EUS-2 complies
with the requirements on overfill preven­tion systems for bottom-loading tank
trucks according to Annex IV of VOC-Di­rective 94/63/EC as well as with European
standard EN 13922 and American API RP
1004 recommendations. Timm has com­bined its longterm competencies in ex­plosion protection and experiences in
overfill prevention in this control unit.
EUS-2 is characterised by ease of installa­tion, convenient operation, functional
safety and a user-friendly state-of-the-art
explosion protection concept (IEPC) de­signed by Timm.

2. Functional Principle

To ensure a safe filling process, the overfill
prevention controller EUS-2 provides
three main functions:

 Overfill prevention
 Grounding verification
 Vapour recovery monitoring

During loading of tank trucks, the level
sensors at the truck (one sensor per tank
compartment) are connected to the con­trol unit at the filling gantry by a standard
plug and socket connection. The level

sensors are positioned in the top of each
tank compartment deep enough to as­sure that once a sensor gets activated,
product flow stops before the compart­ment is completely full. In case a sensor
senses liquid, the control unit triggers to
shut-off the product flow for all compart­ments to prevent leakage of fuel or the
compartment’s bursting.

When being connected to a tank truck,
the control unit EUS-2 detects the type of
level sensors (optic/thermistor), the sen­sor installation (five-wire/two-wire) as well
as the way of ground verification (re­sistance/ ground bolt) and activates auto­matically the required operating mode.
For a wide range of applications, tank
trucks with up to twelve five-wire sensors
and eight two-wire sensors are supported.
The control unit verifies permanently the
correct grounding of the truck via the
connection cable. The preset limit value of
this verification can be set according to in­dividual requirements exceeding EN
13922 requirements.

The vapour recovery hose connection is
monitored on the tank truck via an elec­tro-pneumatic interlock switch, which is
looped into the grounding verification
line. The control unit EUS-2 ensures that
filling is only possible if the vapour recov­ery system and the grounding line are
connected properly.

13.03.2019 | V1.81

2 | 9

Overfill Prevention Controller EUS-2 | Technical Description

[e-mail]
www.timm-technology.de

Figure 2: Opening of enclosure in hazardous
areas for easy configuration

LED signal light in­dicates main status

Graphic display for
plaintext messages

3. Special Features

3.1. Compliance to latest European

and American Standards

The EUS-2 control unit is designed in full
compliance to the newest editions of Eu­ropean ATEX and EMC Standards, Euro­pean Standard on Overfill Prevention EN
13922 as well as to American Guideline API
RP 1004. With Timm Elektronik being an
independent manufacturer, full compati­bility to corresponding truck equipment
and level sensors of other manufacturers
is ensured for operation worldwide. The
control unit EUS-2 is capable to detect au­tomatically the type of counterpart truck
equipment and activates the required op­erating mode. With the offered discon­nector sockets, cables with plugs for the
different receptacles can easily be ex­changed or even connected to the con­troller at once.

3.3. High Functional Safety |

Fail Behavior

All safety related functions, internal com­ponents and the external wiring are mon­itored continuously by the device itself.
Filling release is permitted only if periodic
self-testing operates properly.

3.4. Bright Signal Light

The EUS-2 unit is equipped with a clearly
visible bright multi-colour LED signal
light. With its bevelled edges, the light is
visible in a wide angle. This leads to unam­biguous indication of operational status
and time efficient utilisation at filling sta­tion.

3.2. Intelligent Explosion Protection

TIMM`s intelligent explosion protection
concept (IEPC) combines protection by
intrinsic safety, increased safety, powder
filling and protection by enclosure. With
this unique combination of the types of
protection, the main housing can be
opened in gas hazardous areas when
power is switched on for configuration
and service (e.g. for setting the additional
control outputs or the display language).

3.5. Graphic Display

The large graphic display indicates clearly
visible the actual operating status and
auto-diagnosis information as plaintext
messages. In combination with the joy­stick control, a simple, menu-driven and
self-explaining configuration of the con­trol unit and easy failure analysis is pro­vided. Several character-sets are available
for different languages.