fafnir UM Series Guide

FAFNIR GmbH • Schnackenburgallee 149 c • 22525 Hamburg • Germany • T.: +49 / 40 / 39 82 07 – 0 • F: +49 / 40 / 390 63 39
Technical Documentation
UM-X
Measurement evaluation unit in field housing
Version: 7
Edition:
2021-02
Art. no.: 207119

I Table of Contents
Table of Contents
1Characteristics of the measurement evaluation unit UM-X....................... 1
2Safety Instructions ................................................................................................2
2.1 Password ...............................................................................................................................................2
3Design and Function ............................................................................................3
3.1 Name plate...........................................................................................................................................3
3.2 Buttons...................................................................................................................................................3
3.3 Display Window ..................................................................................................................................3
3.4 Alarm Light ...........................................................................................................................................4
3.5 Buzzer .....................................................................................................................................................4
4Installation ..............................................................................................................5
4.1 Assembly and Connections ............................................................................................................5
4.2 Pin Assignment ...................................................................................................................................6
4.2.1 Sensor Connection.............................................................................................................................6
4.2.2 Output Circuits ....................................................................................................................................7
4.2.3 Power Supply .......................................................................................................................................7
4.2.4 External Acknowledge Button .......................................................................................................7
5Commissioning......................................................................................................7
6Operation................................................................................................................9
6.1 Layout of the display.........................................................................................................................9
6.1.1 Digital display ......................................................................................................................................9
6.1.2 Multi-function field............................................................................................................................9
6.1.3 Button function field .........................................................................................................................9
6.2 Column Display (Analogue Display)..........................................................................................10
6.3 Relay Status Display ........................................................................................................................10
6.4 Main Menu .........................................................................................................................................11
6.4.1 Navigation...........................................................................................................................................11
6.4.2 Password .............................................................................................................................................12
6.4.3 Switch-on the Backlight .................................................................................................................12
6.5 Unit Menu ...........................................................................................................................................13
6.6 Height Menu......................................................................................................................................14

Table of contents II
6.7 Offset Menu (Zero-Point Displacement) .................................................................................15
6.8 Span menu (measuring range)....................................................................................................16
6.8.1 Span - Change...................................................................................................................................16
6.8.2 Span - Reset.......................................................................................................................................17
6.9 Relays Menu.......................................................................................................................................18
6.9.1 Relays - K1 ... K5................................................................................................................................18
6.9.2 S-P On (Switching Point On)........................................................................................................19
6.9.3 S-P Off (Switching Point Off) .......................................................................................................20
6.9.4 On Delay (switching on delay) ....................................................................................................20
6.9.5 Off Delay (switching off delay)....................................................................................................21
6.9.6 Alarm ....................................................................................................................................................21
6.9.7 Acknowledge Menu ........................................................................................................................22
6.10 Test Menu ...........................................................................................................................................23
6.11 Display Menu.....................................................................................................................................24
6.11.1 Brightness ...........................................................................................................................................24
6.11.2 Off Delay..............................................................................................................................................25
6.11.3 On Delay..............................................................................................................................................25
6.12 Reset Menu ........................................................................................................................................26
6.13 Info Display.........................................................................................................................................26
6.14 Menu structure with factory setting..........................................................................................27
6.15 Alarms ..................................................................................................................................................29
6.15.1 Relay alarm.........................................................................................................................................29
6.15.2 Error.......................................................................................................................................................29
6.15.3 Meaning of the error codes .........................................................................................................29
7Maintenance........................................................................................................30
7.1 Servicing ..............................................................................................................................................30
7.2 Return shipment...............................................................................................................................30
8Technical Data.....................................................................................................30
9List of Figures .......................................................................................................31
10 Annex ....................................................................................................................32
10.1 EU Declaration of Conformity .....................................................................................................32
10.2 EC-Type Examination Certificate ................................................................................................33
10.2.1 Supplement........................................................................................................................................35
10.2.2 Instructions.........................................................................................................................................38

III Table of Contents
© Copyright:
Reproduction and translation are permitted only with the written consent of the FAFNIR GmbH. The FAFNIR GmbH
reserves the right to carry out product alterations without prior notice.

Characteristics of the measurement evaluation unit UM-X
Page 1/2
1Characteristics of the measurement evaluation unit UM-X
The measurement evaluation unit UM-X is a stand-alone filling level display for continuous
level sensors. It is directly driven from the power supply and serves at the same time as a
power supply for the level sensor. The filling level can be presented in both analogue and
digital form on the graphic display.
The measurement evaluation unit UM-X also provides five potential-free changeover contacts.
The switching points for the five relays are set via 4 display buttons and the state of the relays
is shown on the display.
The measurement evaluation unit UM-X
•can be used for any level sensors with a 4-20 mA interface
•can be supplied with ATEX approval (intrinsically safe electrical circuit)
•can be supplied as an approved overfill protection device (see manual Overfill Pro-
tection, German, art. no. 207124)
•displays the filling level in digital and analogue form
•has five potential-free changeover contacts as binary outputs
•offers an easy menu-based operation via a graphic display
•is installed in a splash-proof housing
There are 4 versions of the measurement evaluation unit UM-X:
UM-S
Standard version: Evaluation unit with 5 relay outputs and connector for a continuous level
sensor and for an external acknowledge button.
UM-O
Evaluation unit with 5 relay outputs and connector for a continuous level sensor and for an
external acknowledge button.
Approved as an overfill protection device.
UM-Ex
Evaluation unit with 5 relay outputs and connector for a continuous level sensor and for an
external acknowledge button.
Approved for the connection of an explosion-proof sensor (intrinsically safe sensor circuit).
UM-O Ex
Evaluation unit with 5 relay outputs and connector for a continuous level sensor and for an
external acknowledge button.
Approved as an overfill protection device and for the connection of an explosion-proof sensor
(intrinsically safe sensor circuit).

Page 2/3 Safety Instructions
2Safety Instructions
The measurement evaluation unit UM-X is a stand-alone filling level display for continuous
level sensors. Use the system exclusively for this purpose. The manufacturer accepts no liability
for any form of damage resulting from improper use.
The measurement evaluation unit UM-X has been developed, manufactured and tested in ac-
cordance with the state-of-the art technology and the generally accepted safety standards.
Nevertheless, hazards may still arise. For this reason, the following safety instructions must be
observed:
•Do not change or modify the system or add any equipment without the prior con-
sent of the manufacturer.
•All installation and maintenance work, with the exception of functional testing,
must be carried out with the power disconnected.
•The measurement evaluation unit UM-X must be installed outside the potentially
explosive area.
•The installation, operation and maintenance of the measurement evaluation unit
UM-X must be carried out only by expert personnel. Specialised knowledge must
be acquired by regular training.
•Operators, installers and service technicians must comply with all applicable safety
regulations. This also applies to any local safety and accident prevention regula-
tions which are not stated in this guide.
The safety instructions in this user guide are marked as follows:
If these safety instructions are not observed, it may result in the risk of accident or
damages to the system.
Useful information which ensures continued and correct operation of equip-
ment and makes your work easier.
2.1 Password
You will need a password for certain menu options in order to be able to ac-
cess or amend the points in question.
The password will be advised on an attached sheet and may only be used by
trained personnel!

Design and Function Page 3/4
3Design and Function
3.1 Name plate
The name plate contains e.g. the version of your measurement evaluation unit:
•Device type UM-S, UM-O, UM-Ex or UM-O Ex
•Approvals
Figure 1: Design of the measurement evaluation unit UM-X, view from above
3.2 Buttons
With the four buttons you can navigate through the menu structure and configure the meas-
urement evaluation unit.
The function of these buttons is shown in the function-button field of the display and changes
partly in the individual menus (see Section 6.1 „Layout of the display“).
3.3 Display Window
The display shows the filling level information and is used to adjust the parameters for the
measurement evaluation unit.
Display Window
Alarm light
Buttons
Name plate

Page 4/5 Design and Function
3.4 Alarm Light
The measurement evaluation unit is equipped with a red LED “Alarm” to display alarms and
system faults.
The red LED indicates if the alarm thresholds have been exceeded or fallen below or if faults
have occurred (see Section 6.15 „Alarms“).
3.5 Buzzer
The buzzer provides acoustic alarm messages. The alarm sound is interrupted as soon as the
acknowledge button has been pressed, the cause of the alarm or the fault have been eliminat-
ed. The loudness of the buzzer cannot be adjusted.

Installation Page 5/6
4Installation
The installation must be carried out only by expert personnel and in accordance
with all applicable safety regulations. This also applies to any local safety and ac-
cident prevention regulations which are not stated in this guide.
4.1 Assembly and Connections
The measurement evaluation unit UM-X is designed to be wall-mounted. It can only be
mounted and connected in opened condition:
(1) Loosen the four cover screws.
(2) Carefully remove the cover. It is still connected with the circuit board by means of
two ribbon cables.
(3) Remove the plugs in order to enable the cover to be completely removed.
(4) Now you can mount the measurement evaluation unit.
The measurement evaluation unit must be installed outside the potentially explo-
sive area.
(5) After mounting, connect the cables for the power supply and the level sensor to
the measurement evaluation unit. You can optionally connect an external
acknowledge button and external control devices (see Section 4.2 „Pin Assign-
ment“).
After mounting and connecting all electrical lines, close the measurement evaluation unit
again:
(6) First, carefully plug the wide ribbon cable back into its holder, which is protected
against polarity reversal.
(7) Now reconnect the membrane keyboard with the narrow ribbon cable. Pay
particular attention here to the correct seating of the socket as this does not
have reverse polarity protection.
(8) Close the measurement evaluation unit with the four cover screws.

Page 6/7 Installation
4.2 Pin Assignment
The wiring must be carried out only with the power disconnected. Special local
rules and regulations of relevant Professional Associations and Authorities must
be observed (e.g. VDE in Germany).
Observe the maximum values of the operating parameters that are stated in the
Technical Specifications.
Figure 2: Evaluation unit UM-X, pin assignment
4.2.1 Sensor Connection
The sensor is connected to the terminals 1 (-) and 2 (+).
Display connection
Sensor
Acknowledge
button
Power Supply
Membrane
keyboard
Ack.