Bender VME421H User manual

Manual
EN
VME421H
Voltage and frequency monitor for monitoring AC/DC systems
for undervoltage, overvoltage, underfrequency and overfrequency
Software version VME421H-D-1: D236 V2.2x
Software version VME421H-D-2: D237 V2.2x
VME421H_D00141_01_M_XXEN/06.2016

Bender GmbH & Co. KG
P.O. Box 1161 • 35301 Gruenberg • Germany
Londorfer Strasse 65 • 35305 Gruenberg • Germany
Tel.: [phone] • Fax: [phone]
E-Mail: [email protected] • www.bender.de
©Bender GmbH & Co. KG
All rights reserved.
Reprinting only with permission of the publisher.
Subject to change!
Photos: Bender archives

Table of Contents
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VME421H_D00141_01_M_XXEN/06.2016
1. Important information .................................................................................... 5
1.1 How to use this manual ................................................................................. 5
1.2 Technical support: service and support ................................................... 6
1.2.1 First level support ............................................................................................. 6
1.2.2 Repair service ..................................................................................................... 6
1.2.3 Field service ........................................................................................................ 7
1.3 Training courses ................................................................................................ 8
1.4 Delivery conditions .......................................................................................... 8
1.5 Inspection, transport and storage .............................................................. 8
1.6 Warranty and liability ...................................................................................... 9
1.7 Disposal ............................................................................................................ 10
2. Safety instructions ......................................................................................... 11
2.1 General safety instructions ........................................................................ 11
2.2 Work activities on electrical installations ............................................. 11
2.3 Intended use ................................................................................................... 12
3. Function ........................................................................................................... 13
3.1 Device features .............................................................................................. 13
3.2 Function ............................................................................................................ 13
3.2.1 Preset function ............................................................................................... 14
3.2.2 Automatic self test ........................................................................................ 15
3.2.3 Manual self test .............................................................................................. 15
3.2.4 Malfunction ..................................................................................................... 15
3.2.5 Fault memory ................................................................................................. 15
3.2.6 Assigning alarms to the alarm relays K/1K2 ........................................ 16
3.2.7 Time delays t, ton and toff ......................................................................... 16
3.2.8 Password protection (on, OFF) ................................................................. 16
3.2.9 Factory setting FAC ...................................................................................... 17

Table of Contents
4VME421H_D00141_01_M_XXEN/06.2016
3.2.10 Erasable history memory ............................................................................ 17
3.2.11 Alarm LEDs show which relay is in the alarm state ........................... 17
3.2.12 Starting a device using a simulated alarm S.AL .................................. 18
4. Installation and connection ......................................................................... 19
5. Operation and setting .................................................................................. 21
5.1 Fast commissioning for Un = 230 V, 50 Hz ........................................... 21
5.2 Display elements in use .............................................................................. 22
5.3 Function of the operating elements ...................................................... 23
5.4 Menu structure ............................................................................................... 24
5.5 Display in standard mode .......................................................................... 26
5.6 Display in menu mode ................................................................................ 27
5.6.1 Parameter query and setting: Overview ............................................... 27
5.6.2 Setting the response values for undervoltage, overvoltage and
hysteresis .......................................................................................................... 30
5.6.3 Setting the response values for underfrequency,
overfrequency and hysteresis ................................................................... 31
5.6.4 Setting the fault memory and operating principle of the
alarm relays ...................................................................................................... 32
5.6.5 Assigning alarm categories to the alarm relays ................................. 34
5.6.6 Setting the time delay ................................................................................. 36
5.6.7 Factory setting and password protection ............................................ 37
5.6.8 Restoring factory settings .......................................................................... 38
5.6.9 Manual activation of the preset function ............................................. 39
5.6.10 Device information query .......................................................................... 39
5.6.11 History memory query ................................................................................. 39
5.7 Preset function/ factory setting ............................................................... 40
5.8 Commissioning .............................................................................................. 40
6. Technical data VME421H… ......................................................................... 41
6.1 Ordering information ................................................................................... 45
6.2 Standards, approvals and certifications ................................................ 45
INDEX .................................................................................................................... 47

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VME421H_D00141_01_M_XXEN/06.2016
1. Important information
1.1 How to use this manual
Always keep this manual within easy reach for future reference.
To make it easier for you to understand and revisit certain sections in this man-
ual, we have used symbols to identify important instructions and information.
The meaning of these symbols is explained below:
This manual is intended for qualified personnel working in
electrical engineering and electronics!
This signal word indicates that there is a high risk of danger
that will result in electrocution or serious injury if not
avoided.
This signal word indicates a medium risk of danger that
can lead to death or serious injury if not avoided.
This signal word indicates a low level risk that can result in
minor or moderate injury or damage to property if not
avoided.
This symbol denotes information intended to assist the user
in making optimum use of the product.
DANGER
WARNING
CAUTION

Important information
6VME421H_D00141_01_M_XXEN/06.2016
This manual has been compiled with great care. It might nevertheless contain
errors and mistakes. Bender cannot accept any liability for injury to persons or
damage to property resulting from errors or mistakes in this manual.
1.2 Technical support: service and support
For commissioning and troubleshooting Bender offers you:
1.2.1 First level support
Technical support by phone or e-mail for all Bender products
 Questions concerning specific customer applications
 Commissioning
 Troubleshooting
Telephone: [phone]*
Fax: [phone]
In Germany only: 0700BenderHelp (Tel. and Fax)
E-mail: [email protected]
1.2.2 Repair service
Repair, calibration, update and replacement service for Bender products
 Repairing, calibrating, testing and analysing Bender products
 Hardware and software update for Bender devices
 Delivery of replacement devices in the event of faulty or incorrectly
delivered Bender devices
 Extended guarantee for Bender devices, which includes an in-house
repair service or replacement devices at no extra cost
Telephone: [phone]** (technical issues)
[phone]**, -785** (sales)
Fax: [phone]
E-mail: [email protected]
Please send the devices for repair to the following address:

Important information
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VME421H_D00141_01_M_XXEN/06.2016
Bender GmbH, Repair-Service,
Londorfer Str. 65,
35305 Gruenberg
1.2.3 Field service
On-site service for all Bender products
 Commissioning, configuring, maintenance, troubleshooting of Bender
products
 Analysis of the electrical installation in the building (power quality test,
EMC test, thermography)
 Training courses for customers
Telephone: [phone]**, -762 **(technical issues)
[phone]** (sales)
Fax: [phone]
E-mail: [e-mail]
Internet: www.bender-de.com
*Available from 7.00 a.m. to 8.00 p.m. 365 days a year (CET/UTC+1)
**Mo-Thu 7.00 a.m. - 8.00 p.m., Fr 7.00 a.m. - 13.00 p.m

Important information
8VME421H_D00141_01_M_XXEN/06.2016
1.3 Training courses
Bender is happy to provide training regarding the use of test equipment.
The dates of training courses and workshops can be found on the Internet at
www.bender-de.com -> Know-how -> Seminars.
1.4 Delivery conditions
Bender sale and delivery conditions apply.
For software products the "Softwareklausel zur Überlassung von Standard-
Software als Teil von Lieferungen, Ergänzung und Änderung der Allgemeinen
Lieferbedingungen für Erzeugnisse und Leistungen der Elektroindustrie"
(software clause in respect of the licensing of standard software as part of de-
liveries, modifications and changes to general delivery conditions for prod-
ucts and services in the electrical industry) set out by the ZVEI (Zentralverband
Elektrotechnik- und Elektronikindustrie e. V.) (German Electrical and Electron-
ic Manufacturer's Association) also applies.
Sale and delivery conditions can be obtained from Bender in printed or elec-
tronic format.
1.5 Inspection, transport and storage
Inspect the dispatch and equipment packaging for damage, and compare the
contents of the package with the delivery documents. In the event of damage
in transit, please contact Bender immediately.
The devices must only be stored in areas where they are protected from dust,
damp, and spray and dripping water, and in which the specified storage tem-
peratures can be ensured.

Important information
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VME421H_D00141_01_M_XXEN/06.2016
1.6 Warranty and liability
Warranty and liability claims in the event of injury to persons or damage to
property are excluded if they can be attributed to one or more of the follow-
ing causes:
 Improper use of the device.
 Incorrect mounting, commissioning, operation and maintenance of the
device.
 Failure to observe the instructions in this operating manual regarding
transport, commissioning, operation and maintenance of the device.
 Unauthorised changes to the device made by parties other than the
manufacturer.
 Non-observance of technical data.
 Repairs carried out incorrectly and the use of replacement parts or
accessories not approved by the manufacturer.
 Catastrophes caused by external influences and force majeure.
 Mounting and installation with device combinations not recom-
mended by the manufacturer.
This operating manual, especially the safety instructions,
must be observed by all personnel working on the device. Furthermore,
the rules and regulations that apply for accident prevention at the place of use
must be observed.

Important information
10 VME421H_D00141_01_M_XXEN/06.2016
1.7 Disposal
Abide by the national regulations and laws governing the disposal of this de-
vice. Ask your supplier if you are not sure how to dispose of the old equip-
ment.
The directive on waste electrical and electronic equipment (WEEE directive)
and the directive on the restriction of certain hazardous substances in electri-
cal and electronic equipment (RoHS directive) apply in the European Commu-
nity. In Germany, these policies are implemented through the "Electrical and
Electronic Equipment Act" (ElektroG). According to this, the following applies:
 Electrical and electronic equipment are not part of household waste.
 Batteries and accumulators are not part of household waste and must
be disposed of in accordance with the regulations.
 Old electrical and electronic equipment from users other than private
households which was introduced to the market after 13 August 2005
must be taken back by the manufacturer and disposed of properly.
For more information on the disposal of Bender devices, refer to our
homepage at www.bender-de.com -> Service & support.

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VME421H_D00141_01_M_XXEN/06.2016
2. Safety instructions
2.1 General safety instructions
Part of the device documentation in addition to this manual is the enclosed
"Safety instructions for Bender products".
2.2 Work activities on electrical installations
If the device is used outside the Federal Republic of Germany, the applicable
local standards and regulations must be complied with. The European stand-
ard EN 50110 can be used as a guide.
Only qualified personnel are permitted to carry out the
work necessary to install, commission and run a device or
system.
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
 An electric shock
 Damage to the electrical installation
 Destruction of the device
Before installing and connecting the device, make sure
that the installation has been de-energised. Observe the
rules for working on electrical installations.
DANGER

Safety instructions
12 VME421H_D00141_01_M_XXEN/06.2016
2.3 Intended use
The voltage monitor VME421H monitors AC/DC systems in the frequency ran-
ge of DC/15…460 Hz for undervoltage, overvoltage, underfrequency or over-
frequency. Device variant -1 is suitable for the nominal voltage range Un=
9.6…150 V, device variant -2 for Un= 70…300 V. The supply voltage is taken
from the nominal voltage being monitored Un.
In order to meet the requirements of the applicable standards, customised pa-
rameter settings must be made on the equipment in order to adapt it to local
equipment and operating conditions. Please heed the limits of the range of
application indicated in the technical data.
Any use other than that described in this manual is regarded as improper.

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VME421H_D00141_01_M_XXEN/06.2016
3. Function
3.1 Device features
 Undervoltage and overvoltage monitoring of AC/DC systems
in the frequency range DC/15…460 Hz
device variant -1: 9,6…150 V
device variant -2: 70…300 V
 Preset function:
Automatic response value setting for undervoltage and overvoltage,
< U and > U as well as for underfrequency and overfrequ. < f and > f
 Voltage and frequency monitoring with window discriminator func-
tion, < U and > U as well as < f and > f
 Indication of the system frequency f
 Starting delay, response delay and release delay
 Adjustable switching hysteresis for U and f
 r.m.s. value measurement AC + DC
 Measured value display via multi-functional LC display
 Alarm indication via LEDs (AL1, AL2) and changeover contacts (K1, K2)
 N/C operation or N/O operation selectable
 Password protection against unauthorised parameter changing
 The fault memory can be activated or deactivated. In the
"con“ mode, all alarm parameters remain stored on failure of the nomi-
nal voltage being monitored (Un= US)
 Start-up of the device with or without simulated alarm message
3.2 Function
Once the nominal voltage is applied, the starting delay "t" is activated. Measu-
red values changing during this time do not influence the switching state of
the alarm relays.

Function
14 VME421H_D00141_01_M_XXEN/06.2016
The devices provide two separately adjustable measuring channels
(overvoltage/undervoltage). When the measuring quantity exceeds the re-
sponse value (Alarm 1) or falls below the response value (Alarm 2), the time of
the response delays "ton 1/2" begins. After the expiry of the response delay, the
alarm relays switch and the alarm LEDs light. If the measuring value exceeds
or falls below the release value (response value plushysteresis) after the alarm
relays have switched, the selected release delay "toff" begins. After the expiry
of "toff",the alarm relays switch back to their initial position. With the fault
memory activated, the alarm relays remain in alarm state until the reset but-
ton R is pressed. Also in the event of complete power failure of the system be-
ing monitored, the delay times are effective during the energy backup
discharging time.
3.2.1 Preset function
After connecting the system to be monitored for the first time, the response
values for overvoltage and undervoltage (Alarm 1/2) are automatically set
once to:
Response value overvoltage ( > U): 1.1 Un
Response value undervoltage ( < U): 0.85 Un
Response value overfrequency ( > f) at 16.7 Hz, 50 Hz, 60 Hz: fn+ 1 Hz
Response value overfrequency ( > f) at 400 Hz: fn+ 1 Hz
Response value underfrequency ( < f) at 16.7 Hz, 50 Hz, 60 Hz: fn- 1 Hz
Response value underfrequency ( < f) at 400 Hz: fn- 1 Hz
Preset VME421H-D-1 / VME421H-D-2
UnPreset
operating range
Response value
< U
Response value
> U
Device
variant
230 V 196…253 V 196 V 253 V -2
120 V 102…132 V 102 V 132 V -1, -2
60 V 51…66 V 51 V 66 V -1
24 V 20.4…26.4 V 20.4 V 26.4 V -1

Function
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VME421H_D00141_01_M_XXEN/06.2016
If the measured voltage is not within the preset operating range listed in the
table, the message "AL not Set“ appears on the display. Therefore it is neces-
sary to set the response values for Alarm 1 (AL1) and Alarm 2 (AL2) manually.
A detailed description of the process is given in the chapter "parameter set-
ting“.
After restoring the factory settings, the preset function is automatically active
again.
During operation, the preset function can be started manually via the menu
SEt.
3.2.2 Automatic self test
The device automatically carries out a self test after connection to the system
to be monitored and later every hour. During the self test internal functional
faults are detected and appear in form of an error code on the display. The
alarm relays are not checked during this test.
3.2.3 Manual self test
After pressing the internal test button for > 1.5 s, a self test is performed by the
device. During this test, internal malfunction will be determined and appear
in form of an error code on the display. The alarm relays are not checked du-
ring this test.
While the test button T is pressed and held down, all device-related display
elements appear on the display.
3.2.4 Malfunction
If an internal functional fault occurs, all three LEDs flash. An error code will ap-
pear on the display (E01…E32). In such a case please contact the Bender
Service.
3.2.5 Fault memory
The fault memory can be activated, deactivated or can be set to continuous
mode (con). If the fault memory is set to "con“ mode, the stored alarm para-
meters remain stored also in the event of failure of the nominal voltage (Un=
US) and also when the energy backup discharging time has elapsed.

Function
16 VME421H_D00141_01_M_XXEN/06.2016
3.2.6 Assigning alarms to the alarm relays K/1K2
Different alarm categories can be assigned to the alarm relays K1/K2 via the
menu "out".
3.2.7 Time delays t, ton and toff
The times t, ton and toff described below delay the output of alarms via LEDs
and relays.
Starting delay t
After connection to the voltage Unto be monitored, the alarm indication is de-
layed by the preset time t (0…300 s).
Response delay ton
When the response value is reached, the voltage monitor requires the respon-
se time tan until the alarm is activated.
A preset response delay ton (0…300 s) adds up to the device-related operating
time tae and delays alarm signalling (total delay time tan = tae + ton).
If the fault does not continue to exist before the time of the response delay has
elapsed, an alarm will not be signalled.
Release delay toff
When no alarm exists after deactivating the fault memory, the alarm LEDs will
go out and the alarm relays switch back to their initial position. After acti-
vating the release delay (0…300 s), the alarm state is continuously maintained
for the selected period.
3.2.8 Password protection (on, OFF)
With the password protection activated (on), settings are only possible after
entering the correct password (0…999).
If you cannot operate your device because you cannot remember your pass-
word, please contact [e-mail].

Function
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VME421H_D00141_01_M_XXEN/06.2016
3.2.9 Factory setting FAC
After activating the factory setting, all settings previously changed are reset to
delivery status. In addition, the preset function allows automatic adaptation
of the response values in relation to the nominal voltage Un.
3.2.10 Erasable history memory
The first alarm value that occurs will be stored in this memory. Subsequent
alarms do not overwrite this "old“ value.The memory can be cleared using the
Clr key in the menu HiS.
3.2.11 Alarm LEDs show which relay is in the alarm state
When the menu item LEd is activated, the alarm LED AL1 indicates that
K1 is in the alarm state. When AL2 lights up, K2 is in the alarm state. An alarm
relay cannot switch to the alarm state unless an alarm category has been assi-
gned to it.
When the menu item LEd is deactivated, AL1 signals overvoltage, AL2
signals undervoltage.
Both LEDs AL1 and AL2 light up in case of frequency alarm.
For details about alarm category assignment to the respective relays refer to
the submenu out description on page 25.

Function
18 VME421H_D00141_01_M_XXEN/06.2016
3.2.12 Starting a device using a simulated alarm S.AL
If the menu item S.AL has been activated in the out menu, K1 resp. K2 switches
back to the alarm state once the supply voltage is applied. This alarm state is
maintained for the set duration t+ ton1. Once this time has elapsed, K1 resp.
K2 switches back to the initial position provided that no fault is detected at the
measuring input.
The following diagrams show the effect of a fault during a simulated alarm.
Faults at the measuring input and the resulting condition of the alarm relay K1
(K2) are shown as a hatched area.
The fault for K1 shown in the time diagram below, by way of example, has star-
ted during the S.AL phase:
The fault for K1 shown in the time diagram below, by way of example, started
when the S.AL phase has elapsed:
t
on1
t
t
on1
S.AL
U
F
U
N
K1
t
on1
t
t
on1
S.AL
U
F
U
N
K1

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VME421H_D00141_01_M_XXEN/06.2016
4. Installation and connection
General dimension diagram and drawing for screw fixing
The front plate cover is easy to open at the lower part identified by an arrow.
Only qualified personnel are permitted to carry out the
work necessary to install, commission and run a device or
system.
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
 An electric shock
 Damage to the electrical installation
 Destruction of the device
Before installing and connecting the device, make sure
that the installation has been de-energised. Observe the
rules for working on electrical installations.
DANGER
Zubehör/
Accessory
100 mm
116 mm
2
2

Installation and connection
20 VME421H_D00141_01_M_XXEN/06.2016
1. DIN rail mounting:
Snap the rear mounting clip of the device into place in such a way that
a safe and tight fit is ensured.
Screw fixing:
Use a tool to move the rear mounting clips (a second mounting clip is
required, see ordering information) to a position that it projects bey-
ond the enclosure. Then fix the device using two M4 screws.
2. Wiring
Connect the device according the wiring diagram.
Terminal Connections
U1/+, U2/- Connection to the system being
monitored
11, 12, 14 Alarm relay K1
21, 22, 24 Alarm relay K2
U1/+
U2/-
U
n
1
2
3