Hauber Elektronik HE255 Series User manual

Betriebsanleitung
englisch
Doc ID: M001-HE255 Stand: 2023-01-09
Vibration Monitoring Unit
Series HE255
•Vibration acceleration (g rms)
•Bearing status parameter for roller bearing diag-
nostic
•ATEX / IECEx / UKEx Zones 2/22 and 1/21
•cULus OrdLoc / HazLoc Div 2
•2 potential-free switching contacts (Window func-
tion)
•2 analogue current outputs: 4–20 mA
•Frequency range: 10 Hz –1000 Hz
1 Hz –1000 Hz
Date of manufacture:
Type description:
Serial no.:

HAUBER-Elektronik GmbH
Operating instructions
Vibration Monitoring Unit
Type HE255
Standard and ATEX / IECEx / UKEx
HE255
Version: 2023-01-09
Attention!
Prior to commissioning the product, the instruction manual must be read and un-
derstood.
All rights reserved, including rights to translation.
Subject to modifications.
Please contact the company with any questions:
HAUBER-Elektronik GmbH
Fabrikstraße 6
D-72622 Nürtingen
Germany
Tel.: [phone] / 21750-0
Fax: [phone]
[e-mail]
www.hauber-elektronik.de

HAUBER-Elektronik GmbH
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1 Contents
1Contents...................................................................................................................................................3
2Safety information....................................................................................................................................5
3Scope of this instruction manual..............................................................................................................6
4Vibration monitoring HE255.....................................................................................................................6
5Intended Use............................................................................................................................................6
6Scope of supply .......................................................................................................................................6
7Documents and Certificates.....................................................................................................................7
8Transfer of liability when operating in potentially explosive atmospheres...............................................7
9Overview of application areas..................................................................................................................8
10 Example labels.........................................................................................................................................9
11 Information on the cULus validity range ................................................................................................10
12 Functional safety instructions ................................................................................................................11
12.1 Safety level / key indicators ................................................................................................................11
12.2 General notes .....................................................................................................................................11
12.3 Instructions for the Fail Safe State......................................................................................................11
13 Technical data........................................................................................................................................12
13.1 General data.......................................................................................................................................12
13.2 Electrical data .....................................................................................................................................12
13.3 Typical frequency response................................................................................................................13
13.4 Properties of the integrated cable.......................................................................................................14
13.5 Mechanical data..................................................................................................................................14
13.6 Housing dimensions............................................................................................................................15
14 Connection.............................................................................................................................................16
15 Functional description............................................................................................................................17
15.1 Operating conditions...........................................................................................................................17
15.2 Alarm and limit setting ........................................................................................................................18
15.3 Limit values and delay times...............................................................................................................19
15.4 Bearing status parameter for roller bearing diagnostic.......................................................................20
16 Assembly and disassembly....................................................................................................................22
16.1 General notes .....................................................................................................................................22
16.2 Fixing the vibration monitoring unit to the mounting surface..............................................................22
16.3 Variant HE255.02 (Zone 2 / 22)..........................................................................................................23
16.4 Tamper protection...............................................................................................................................24
17 Installation and commissioning..............................................................................................................25
17.1 General notes .....................................................................................................................................25
17.2 Earthing concept.................................................................................................................................25
18 Maintenance and repair.........................................................................................................................26
18.1 General notes .....................................................................................................................................26
18.2 Troubleshooting Table........................................................................................................................26
19 Transport, storage and disposal ............................................................................................................27

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20 Coding HE255........................................................................................................................................28
21 EU and UK Declaration of Conformity ...................................................................................................29

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2 Safety information
2.1 General
The safety instructions are intended to protect people and property from damage and hazards
that could arise as the result of improper use, incorrect operation or other misuse or devices,
especially in explosive areas. Therefore, please read the operating instructions carefully before
working on the product or operating it. The operating instructions must be accessible to operat-
ing personnel at all times.
Please make sure that all documents are present and complete before commissioning or per-
forming other work on the product. If the documents have not all been delivered in full or if fur-
ther copies are necessary, they can also be obtained in other languages.
The product is built according to the latest state of the art. However, hazards to people, machin-
ery and systems can still arise as the result of improper handling, unintended use or operation
and maintenance by persons inadequately trained on the product.
All those who are involved in the installation, operation and maintenance of the product in the
operator’s plant must read and understand the operating instructions.
The product may only be assembled, disassembled, installed and repaired by instructed, suffi-
ciently trained and authorised personnel.
2.2 Symbols used
This symbol indicates an explosion hazard.
This symbol indicates a hazard from electrical current.
This symbol indicates safety-related information.
This symbol indicates information unrelated to safety.

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3 Scope of this instruction manual
This instruction manual for the HE255-type vibration monitoring unit applies to the following ver-
sions:
HE255.00, HE255.01 and HE255.02
The variants are functionally identical. The variants HE255.01 and HE255.02 have
additional certifications and labels which permit use in potentially exclusive atmospheres.
For further information, see chapter "Overview of application areas” on page 8.
4 Vibration monitoring HE255
The HE255 type vibration monitoring unit is used to measure and monitor the vibration accele-
ration of machinery. Furthermore, vibration monitoring determines a bearing status parameter
for the roller bearing diagnostic. It offers the following features:
•Two limit values and associated delay timings can be adjusted separately.
•The two potential-free switching contacts will signal when values exceed or fall below the
limit values of the defined window area. This can be used to generate an alarm.
•Measurement parameter: vibration acceleration (g rms).
•Analogue current output: Interference-free DC signal from 4-20 mA, proportional to the
measuring range of the monitoring unit.
•Analogue current output: Interference-free DC signal from 4-20 mA, bearing status para-
meter
•A break on the monitoring cable can be detected by the subsequent evaluation device:
DC signal value < 3.5 mA.
5 Intended Use
The HE255 is used to protect machines and mechanical equipment against undue strong vibra-
tions. It may only be used in accordance with the specifications listed in the data sheet. It is
used exclusively for measuring mechanical vibrations.
Main fields of application: Conveyors, screening equipment, drying and cooling equipment and
similar oscillating mechanical equipment.
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
6 Scope of supply
All versions include:
•Vibration monitoring
•Cylinder head screw with hex socket, M8 x 20 mm
•Seal label
•Operating instructions

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7 Documents and Certificates
You can find the following documents and certificates for HE255 type at www.hauber-elektro-
nik.de where they can be viewed and downloaded:
•EU type examination certificate ATEX Zone 1 / 21, no.: UL 20 ATEX 2421 X Rev. 0
•Type examination certificate ATEX Zone 2 / 22, no.: UL 21 ATEX 2570 X
•IECEx certificate of conformity, no.: IECEx ULD 20.0022X
•UL certificate of conformity, no.: E507077-20210204
•UKEx certificate number: UL22UKEX2479X
•UKEx certificate number: UL22UKEX2480X
•EAC Declaration
•Functional safety certificate (SIL 2)
•Safety manual SIL2
8 Transfer of liability when operating in potentially explosive atmospheres
The owner of the system is exclusively liable for the appropriate configuration of the electrical
connections with respect to explosion protection regulations and correct commissioning.
If the system is installed by a sub-contractor on behalf of the owner, the system may only be
commissioned after the sub-contractor has issued written confirmation in the form of a certificate
of installation that the system has been installed correctly and professionally in accordance with
the applicable legal regulations.
The operator is obliged to notify the responsible authorities of the initial commissioning of explo-
sion-protected systems or system components and their re-commissioning following extensive
changes or maintenance.

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9 Overview of application areas
Coding
HE255.00.xx.xx.xx.00.xxx
HE255.00.xx.xx.xx.01.xxx
HE255.02.xx.xx.xx.00.xxx
HE255.02.xx.xx.xx.01.xxx
HE255.01.xx.xx.xx.00.xxx
HE255.01.xx.xx.xx.02.xxx
Connection
M12 connector
x
x
Integrated cable
x
x
x
x
Measuring head temperature TM
Ambient temperature TA
Restriction for the
range of application cULus:
-30 °C ≤ TM≤ 80 °C
-30 °C ≤ TA≤ 60 °C
-40 °C ≤ TM≤ 85 °C
-40 °C ≤ TA≤ 60 °C
x
x
x
-35 °C ≤ TM≤ 125 °C
-35 °C ≤ TA≤ 60 °C
x
x
-20 °C ≤ TM≤ 125 °C
-20 °C ≤ TA≤ 60 °C
x
Standard
IEC
x
x
x
x
x
x
Proc. Cont. Eq. Ord. Loc
E507077
x
x
x
x
Ex Zone 2 and 22
II 3G Ex ec IIC T4 Gc
II 3D Ex tc IIIC 135°C Dc
UL 21 ATEX 2570 X
x
x
IECEx
Ex ec IIC T4 Gc
Ex tc IIIC 135°C Dc
IECEx ULD 20.0022 Issue 0X
x
x
II 3G Ex ec IIC T4 Gc
II 3D Ex tc IIIC 135°C Dc
UL22UKEX2480X
x
x
Proc. Cont. Eq. Haz. Loc.
Class I, Division 2, Groups A, B, C and D, T4
Class II, Division 2 Groups F and G, T4
E516625
x
x
Ex ec IIC T4 Gc
Ex tc IIIC 135°C Dc
UL-BR 21.1250X
x
x
CCC
Ex nA IIC T4 Gc
Ex tD A22 IP66/67 T135°C
No: 2021122315114599
x
x
Ex Zone 1 and 21
II 2G Ex db IIC T4 Gb
II 2D Ex tb IIIC 135°C Db
UL 20 ATEX 2421 X
x
x
IECEx
Ex db IIC T4 Gb
Ex tb IIIC 135°C Db
IECEx ULD 20.0022 Issue 0X
x
x
II 2G Ex db IIC T4 Gb
II 2D Ex tb IIIC 135°C Db
UL22UKEX2479X
x
x
Ex db IIC T4 Gb
Ex tb IIIC 135°C Db
UL-BR 21.1250X
x
x
CCC
Ex d IIC T4 Gb
Ex tD A21 IP66/67 T135°C
No: 2021122315114599
x
x
Segurança
BR
O CP-002 9
Segurança
BR
O CP-002 9

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10 Example labels
Variant 1 - HE255.00.xx.xx.xx.00.000
Variant 2 - HE255.00.xx.xx.xx.01.xxx
Variant 3 - HE255.02.xx.xx.xx.00.000
Variant 4 - HE255.02.xx.xx.xx.01.xxx
Variant 5 - HE255.01.xx.xx.xx.00.xxx
Variant 6 - HE255.01.xx.xx.xx.02.xxx

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11 Information on the cULus validity range
In order to install the device according to the UL/CSA/IEC standard, the following information
must be observed.
Electrical protection
Devices must be protected by means of fuses, circuit breakers, overheating
protection, impedance-limiting switches or similar to ensure protection against
excessive power output if there is a fault in the device. Protection must be ap-
plied to supply lines and switching lines.
A circuit breaker suitable for 30V/3A according to UL Standard 489/CSA Stan-
dard (C22.2) no. 5/IEC 60947-2 must be installed near the device.
A fuse suitable according to UL Standard 248/CSA Standard (C22.2) no.
248/IEC 60127 must be installed near the device. The fuse must have a slow
triggering characteristic (“T”).
Limited temperature range
The following temperature ranges apply for variants with integrated cable:
Measuring head tempera-
ture
-30 °C ≤ TM≤ +80° C
Ambient temperature
-30 °C ≤ TAmb ≤ +60° C

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12 Functional safety instructions
12.1 Safety level / key indicators
The HE255 vibration monitoring hardware was tested by TÜV Süd. The results meet the criteria
according to SIL2 and Pl-d.
MTTF
984,898 hours = 112.43 years
DCavg
>90%
MTTFd
2,889,526 hours = 329.85 years = HIGH
CCF
95 (fulfilled)
Further key indicators and information can be found in the safety manual
12.2 General notes
A reboot of the vibration monitoring unit must be performed annually in order to
test the switching of potential-free switching contacts.
While the sensor is in configuration mode, the safety functions are deactivated.
12.3 Instructions for the Fail Safe State
When the power supply is switched on, the vibration monitoring unit will perform a self-test.
During operation, self-tests are performed automatically in cycles. If a self-test fails, the vibration
monitoring unit switches to the Fail Safe State.
In the Fail Safe State all status LEDs are lit, all potential-free switching contacts are open and
the analogue current output supplies 0 mA.

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13 Technical data
13.1 General data
Each sensor has one of the listed measuring and frequency ranges. Further
ranges on request.
Please indicate the measuring and frequency range in your request.
Measuring range:
0 –1 g rms
0 –2 g rms
0 –4 g rms
0 –6 g rms
0 –8 g rms
0 –10 g rms
Measuring accuracy:
± 10% (as per DIN ISO 2954)
Transverse sensitivity:
< 5%
Frequency range:
10 Hz...1000 Hz (standard)
1 Hz...1000 Hz
Calibration point:
159.2 Hz and 90% amplitude of measuring range
Readiness delay:
10 sec Seconds
Bearing status parameter:
Weighted crest factor.
Crest factor 

Weight / categorised by vibration intensity diagram from DIN
ISO 13373-3
Maximum acceleration:
±16.5 g
Lifetime:
10 years
Tab. 1: General data
13.2 Electrical data
Output signal:
1 x 4-20 mA (proportional to the measuring range)
1 x 4-20 mA (bearing status parameter)
Switching contact:
2 x potential-free switching contacts (pre- and main alarm)
Switching contact switching
load:
1A / 30 V DC
Power supply:
24 V DC ± 10%
Power input (max.):
100 mA
Load/output load (max.):
500 Ω
Automatic:
As soon as the vibration values fall below the limit values, the
potential-free switching contacts automatically re-energize.
Tab. 2: Electrical data

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13.3 Typical frequency response
10 Hz–1,000 Hz (standard)
The frequency response is recorded using a reference sensor.
• 4 Hz. . . 1200 Hz acceleration sensor
Fig. 1: Typical frequency response 10 Hz–1000 Hz
1 Frequency in Hz
2 Amplification in dB
1 Hz–1000 Hz
The frequency response is recorded using two reference sensors.
• 1 Hz. . . 10 Hz laser sensor
• 10 Hz. . . 1200 Hz acceleration sensor
Fig. 2: Typical frequency response 1 Hz–1000 Hz
1 Frequency in Hz
2 Amplification in dB

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13.4 Properties of the integrated cable
Cable type
Li9YC11Y 8x0.25 mm²
Conductor material
E-Cu stranded wire
Conductor insulation
PP 9Y
Coating
PUR 11Y Etherbase
Coating diameter
6.0 ± 0.2 mm
Temperature range
-40 °C … +90 °C fixed
-20 °C … +90 °C moving
Minimum bending radius
30 mm fixed
60 mm moving
Flame resistant
Yes, according to UL FT2
Halogen-free
Yes, according to VDE 0472 Part 815
Tab. 3: Technical data of the integrated cable
13.5 Mechanical data
Additional materials can be found in section "Coding" on page 28.
Housing material:
Stainless steel V2A, material no.: 1.4305 (standard)
Fastening:
Cylinder head Allen screw M8 x 20 mm
Thread pitch: 1.25 mm (standard)
Mounting:
Housing must be earthed via the M8 fastening
Cover tightening torque:
5 Nm
Measuring direction:
Along the fastening axis
Weight:
approx. 500 g
Protection class:
Cover and plug connection closed:
IP 66/67
Type 4X enclosure
Product is suitable for outdoor use
Max. humidity:
100%
Tab. 4: Mechanical data

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13.6 Housing dimensions
Fig. 3: Housing with M12 connector
Fig. 4: Housing with integrated cable
1 M12 connector
2 Measuring direction
1 Cable gland
2 Connecting cable
3 Measuring direction
All measurements in mm
Fig. 5: Housing with integrated cable and clamping sleeve base for metal protection hose
1 Cable gland
2 Connecting cable
3 Measuring direction
4 Clamping sleeve base for metal protection hose

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14 Connection
Version:
M12 connector
Pin 1:
24 V DC
Pin 2:
GND
Pin 3:
4-20 mA vibration amplitude
Pin 4:
4-20 mA bearing status parameter
Pin 5:
Potential-free switching contact 1 +
Pin 6:
Potential-free switching contact 1 -
Pin 7:
Potential-free switching contact 2 +
Pin 8:
Potential-free switching contact 2 -
Version:
Integrated cable
Pin 1:
white
24 V DC
Pin 2:
brown
GND
Pin 3:
green
4-20 mA vibration amplitude
Pin 4:
yellow
4-20 mA bearing status parameter
Pin 5:
grey
Potential-free switching contact 1 +
Pin 6:
pink
Potential-free switching contact 1 -
Pin 7:
blue
Potential-free switching contact 2 +
Pin 8:
red
Potential-free switching contact 2 -
Wiring diagram:
Fig. 6: Wiring diagram
1 Potential-free switching contact 1 (pin 5: + , Pin 6: -)
2 Potential-free switching contact 2 (pin 7: + , Pin 8: -)
3 Evaluation unit vibration amplitude
4 Evaluation unit bearing status parameter
The wiring diagram shows the alarm status or the current status!
Potential-free switching contacts 1 and 2 are open.

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15 Functional description
In an explosive atmosphere the vibration monitoring unit HE255 will only be o-
pened in a de-energized state.
The type HE255 is used for monitoring vibration acceleration.
If the acceleration value is below or above the adjustable window area,
an alarm will be triggered. The vibration monitoring unit contains two channels independent
from each other, LIM1 and LIM2. The lower limit value of the window area is adjusted on LIM1
and the upper limit value is adjusted on LIM2 (see chart).
The HE255 type also has an analogue current output. This supplies direct current of 4-20 mA
proportional to the vibration amplitude.
Fig. 7: Window function
1 Alarm for values below LIM1
2 Window area
3 Alarm for values above LIM2
15.1 Operating conditions
Operating state
Reading
Switching
contacts
LED status
OK
Within limit values
Closed
green
WARNING
Outside of limit values, delay
time runs
Closed
green + yellow
ALARM
Outside of limit values, delay
time expired
Open
red
Fail Safe State
0 mA
Open
red + yellow + green
De-energized
0 mA
Open
All LEDs off
Tab. 5: Operating conditions

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15.2 Alarm and limit setting
By pressing the "Save Config" button, the current configuration is displayed by the LEDs around
the HEX switches. For further information, see chapter "Limit values and delay times” on page
19.
The limit values and delay times are calibrated using the respective HEX switch. As soon as a
switch position is changed, all LEDs start flashing. Press and hold the "Save Config" button for
three seconds to save the configuration. Acceptance of the configuration is signalled by steady
lighting up of the LEDs in the selected HEX switch position.
The configuration can only be accepted if LIM1 ≤ LIM2.
After about five minutes the LEDs turn off automatically.
While the sensor is in configuration mode, the safety functions are deactivated.

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15.3 Limit values and delay times
SET-
Position
Limit values (g)
Measuring
range
0-1 g
0-2 g
0-4 g
0-6 g
0-8 g
0-10 g
0
0
0
0
0
0
0
1
0.063
0.125
0.25
0.375
0.5
0.625
2
0.125
0.25
0.5
0.75
1
1.25
3
0.188
0.375
0.75
1.125
1.5
1.875
4
0.25
0.5
1
1.5
2
2.5
5
0.313
0.625
1.25
1.875
2.5
3.125
6
0.375
0.75
1.5
2.25
3
3.75
7
0.438
0.875
1.75
2.625
3.5
4.375
8
0.5
1
2
3
4
5
9
0.563
1.125
2.25
3.375
4.5
5.625
10
0.625
1.25
2.5
3.75
5
6.25
11
0.688
1.375
2.75
4.125
5.5
6.875
12
0.75
1.5
3
4.5
6
7.5
13
0.813
1.625
3.25
4.875
6.5
8.125
14
0.875
1.75
3.5
5.25
7
8.75
15
0.938
1.875
3.75
5.625
7.5
9.375
Tab. 6: Limit values
The SET rotary button has 16 positions, representing the limit value of an alarm. The measur-
ing range of the vibration monitoring unit is divided into 16 linear steps.
In general:   
 
Example: Limit setting
Measuring range:
0–4 g
SET rotary button Pos.:
8 (9)
Limit value:
2 g (2.25 g)
Delay times
TIME Position
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Delay time
(secs)
0
1
2
3
4
5
7.5
10
12.5
15
17.5
20
25
30
45
60
Tab. 7: Delay times

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15.4 Bearing status parameter for roller bearing diagnostic
The monitoring of the HE255 has a bearing status parameter identification for the roller bearing
diagnostic in accordance with DIN ISO 13373-3.
In accordance with DIN ISO 13373-3, the bearing status parameter observes the ratio of the
highest peak acceleration value in m/s² to the effective acceleration value in m/s² rms. An
averaging time of t=1s is established for the effective value of the bearing status parameter. The
highest peak value is determined over the duration of the averaging time, meaning t=1s here as
well.
The frequency range to be observed is between 10Hz–10kHz. The signal ratio serves to diag-
nose the bearing status for roller bearings, in line with the crest factor.
Norm DIN ISO 13373-3 categorises the roller bearing status into four ranges:
Fig. 8: Vibration intensity diagram [DIN ISO 13373-3]
X Effective acceleration value (total value of 10 Hz to 10 kHz) in m/s²
Y highest peak acceleration value in m/s²
1 range 1 = very low value
2 range 2 = normal (normal status)
3 range 3 = warning message
4 range 4 = alarm
This vibration intensity diagram is not recommended for machines powered by
a gear unit or machines for which there is usually heavy background noise.
The vibration monitoring unit continually determines the bearing status parameter. The bearing
status parameter is scaled based on the vibration intensity diagram at current output 4–20 mA.