Peter electronic VersiSafe Speed 27810 Series User manual

electronic
Quality is our Drive.
Safety Frequency Monitor
VersiSafe Speed
Assembly- and Commissioning Instructions

VersiSafe Speed 1
as per 12/22 17810.10001
Table of Contents Page
1. Safety remarks 3
2. Conformity 3
3. Product Description 4
4. Designated Use 4
5. EC Declaration of Conformity 5
6. Functions 6
7. general description 8
7.1 Applications 8
7.2 Features 9
8. Notes 10
8.1 Frequency measuring input 10
8.2 Manual reset, automatic reset 10
8.3 Semiconductor outputs 10
8.4 Setting the frequency thresholds 10
8.5 Feedbak circuit 11
8.6 Start up time delay tA 11
8.7 Alarm delay tV 11
8.8 Reset delay time tF 11
8.9 Minimum frequency 11
8.10 Display 11
8.11 Parameterization using the display 12
8.12 Change tracking 15
8.13 Digital selection via the software Inputs: SW1 to SW4 16
9. Device and function description 17
9.1 Function Diagram 17
9.2 Muting function 18
9.3 Analogue output A+ and A GND 18
9.4 Switchover time period tU 18
10. Technical Data 18
10.1 Frequency Measuring Input 18
10.2 Auxiliary circuit (A1-A2) 19
10.3 Output 19
10.4 General Data 20
10.5 Safety Related Data 21
10.6 Dimensions 22
10.7 Characteristic 23

2 VersiSafe Speed
Notes and symbols used in these instructions
Note: Notes explain the advantages of certain adjustments or settings and help
you to make use of the device in the best possible way.
Warning notices: Read them carefully and follow them strictly!
Warning notices are indicated in order to protect you against danger or to
help you to prevent the device from being damaged.
Caution: Danger to life through electric shock!
When you see this sign, always make sure that the device is de-energized
and secured against unintentional energizing.
These commissioning instructions were prepared with great care. Nevertheless, PETER
electronic GmbH & Co. KG does not assume liability for damage resulting from mistakes
possibly contained in this manual. Technical changes that serve to improve the product are
subject to change without notice.
Disposal Instructions
Equipment containing electrical components may not be disposed of
together with domestic waste. It must be collected separately as electrical
and electronic waste according to local and currently valid legislation.
11. Failure monitoring 24
11.1 Troubleshooting 24
11.2 Fault handling 24
11.3 Maintenance and repairs 24
12. Connection diagramm 25
12.1 with single-phase motor 25
12.2 with 3-phase motor 26

VersiSafe Speed 3
1. Safety remarks
Installation and setup of the VersiSafe Speed must only be carried out by well trained
staff, with knowledge about all relevant standards for safety, accident avoidance and
control circuits. This manual must be read and understood before installation and
setup.
The product hereby described was developed to perform safety functions as a part of a whole
installation or machine. A complete safety system normally includes sensors, evaluation units,
signals and logical modules for safe disconnections. The manufacturer of the installation or
machine is responsible for ensuring proper functioning of the whole system.The supplyer cannot
guarantee all the specifications of an installation or machine that was not designed by the suppler.
The total concept of the control system into which the device is integrated must be validated by
the user.The supplyer also takes over no liability for recommendations which are given or implied
in the following description. The following description implies no modification of the general terms
of delivery, warranty or liability claims.
The unit should be panel mounted in an enclosure rated at IP 54 or superior. Dust and dampness
may lead to malfunction.
Risk of fire or other thermal hazards!
The device may only be used for the applications described in the mutually applicable
operating instructions / data sheet. The notes in the respective documentation must
be heeded. The permissible ambient conditions must be observed. In particular, the current limit
curve must be heeded.
2. Conformity
In industrial linguistic usage the Safety Standstill Monitor of the type series VersiSafe Speed are
called "devices", however, in the sense of the "device-safety-law", the "EMC-law" or the "EC
machinery directive" they are not devices or machines ready for use or connection but they are
components. It is only possible to define their final function, when these components are
integrated into the design and construction of the user.
To be able to use the devices to their intended purpose, it requires power supply networks
according to DIN EN 50160 (IEC38).
The user takes the responsibility that the user’s design and construction comply with the appli-
cable legal provision.
The commissioning is strictly forbidden as long as the conformity of the final product with the
guideline 2006/42/EC (Machinery directive) is not proved.

4 VersiSafe Speed
3. Product Description
The safety frequency monitor is used for safe frequency monitoring of AC voltages, as well as for
detecting the phase sequence and thus monitoring the direction of rotation. It is used to monitor
the output frequency of inverters or the rotor frequency of slipring motors. An other application
area is the moni-toring of motors in crane plants. Using the front side display the parame-ters can
be easily and comfortably adapted to the individual application or changed when necessary.
4. Designated Use
The UH 6937 Frequency Monitor serves the secure recognition and/or supervision of over- and
under-frequencies or for the supervision of a set frequency window. The detection of the
frequency is enabled via the frequency measuring inputs: E1a, E1b, E2L, E2H, E3L and E3H.
The frequency (revolution) ranges, the supervisory function and other parame-ters are to be set
by the user on the front display and can be adjusted to suit a variety of applications.
When used in accordance with its intended purpose and following these operating instructions,
this device presents no known residual risks. Non-observance may lead to personal injuries and
damages to property.
Your Advantage
• For frequency monitoring up to PL e / Cat. 4 and SIL 3
• For direction of rotation monitoring up to PL d / Cat. 2 and SIL 2
• Simple and time saving setup without PC
• Comfortable, menu guided configuration via frontside display
• Reduzierung der Ausfallzeiten der Anlage durch umfangreiche Diagnosefunktionen
• einfach in bestehende Antriebslösungen integrierbar
• für Frequenzumrichter bis 700 Hz
• mehrsprachig: englisch, deutsch, französisch

VersiSafe Speed 5
5. EC Declaration of Conformity
EC Declaration of Conformity
The manufacturer / company placing the product on the market
(authorized representatives of the manufacturer / companies placing the product on the market
that are established within the Community)
Name / Address: PETER electronic GmbH & Co. KG
Bruckäcker 9
92348 Berg
hereby declares that the following product (device, component, unit) in the version as supplied
Product designation: Safety Frequency Monitor
Series / type designation: VersiSafe Speed
Article number: 27810...
Year of manufacture: 2017
complies with the provisions of the following EU-directives:
2014/30/EU
2006/42/EG
2011/65/EU
This EC Declaration of Conformity is no longer valid, if the product is modified or changed
without our agreement.
This declaration is issued under the sole responsibility of the signatory.
Berg, 20.09.2018 Dr. Thomas Stiller, Managing director
(place, date) (signatory and function of the signatory) (signature)
Electromagnetic compatibility
Machinery Directive
RoHS-Directive
The following harmonized standards have been applied:
Basis of Testing EN ISO 13849-1:2008+AC:2009
EN 62061:2005+AC:2010+A1:2013
IEC 61508 Parts 1-7:2010
EN 61000-6-1:2007
EN 61000-6-3:2007 + A1:2011
EN 61800-5-2:2007 (in extracts)
EN 50178:1997
EN 60204-1:2006+A1:2009+AC:2010 (i. extracts)
EN 61000-6-2:2005
EN 61000-6-4:2007 + A1:2011

6 VersiSafe Speed
6. Functions
The auxiliary voltage is connected to terminals A1-A2. he equipment can be configured via the
display and the setting keys on the front plate. Terminals E1a, E1b, E2L, E2H, E3L and E3H form
the measuring input.
For low voltages the measuring voltage is connected to E1a-E2L and E1b-E3L and for higher
voltages to E1a-E2H and E1b-E3H (see section technical data).
When monitoring single phase AC voltage, it is recommended to connect the terminals E1a-E2L
or E1a-E2H directly to the inverter, the terminals E1b-E3L or E1b-E3H directly to the motor
connection terminals. Seperate wires in separate cables with space to each other have to be
used for each of the frequency inputs. When monitoring 3-pase AC voltages it is recommended to
wire these terminals directly to the motor connection terminals.
The input frequency is compared to the setting value. As the device measures the cycle duration
the fastest frequency measurement is possible. Should the over-frequency function be set, then
the output relay will switch to the alarm mode, when the set response parameter is over-
exceeded longer than the parametered alarm-delay function (tV). Should the frequency fall again
below the response parameter, minus the set hysteresis, the output relay will be activated after
the expiry of the reset-delay time period (tF) and return to its pre-set permitted supervisory state.
As regards the under-frequency function, the output relay will switch to the alarm mode, when the
set response parameter is under-exceeded longer than the parametered alarm-delay function (tV)
time period. As soon as the frequency return to the range governed by the response parameter,
plus the set hysteresis, then the output relay will again return to the pre-set permitted state after
the expiry of the reset-delay time period (tF).
In the „internal window function mode“, the output relay will switch to the alarm setting when the
frequency exceed the pre-set permitted range of the response parameter. Once the frequency
again return within the range of both the upper- and lower response parameters, minus and/or
plus the pre-set hysteresis values (upper response parameter minus- and/or the lower response
parameter plus -the relative hysteresis values), then the output relay will again switch back to the
pre-set permitted range after the expiry of the reset-delay time period (tF).
In the „external window function mode“, the monitoring function acts inversely to the „internal
window function“. Should the manual reset function be activated, then the output relay continues
to remain in the alarm setting when the frequency return to the pre-set permitted range. A
resetting of the saved parameter is possible when the reset input is activated or the auxiliary
voltage is shutdown. When a start-up delay time period (tA) is set, then the set start-up delay time
period will initially expire as soon as the auxiliary voltage of the equipment is switched-on and the
‘RF’ feedback circuit is closed. The start-up delay time period will also expire after a reset of the
manual reset mode. During this time period, a frequency evaluation is disabled and the output
relays remain at the pre-set permitted setting. The start-up delay function can, for example
override an alarm message during the start-up stage of a generator or electric motor. Should,
after a reset (in the manual reset mode), the feedback circuit not be closed, then the equipment
will go into a safe error state. With correct connection it is possible to realise with the UH 6937 the
safety functions STO (Safe Torque Off), SOS (Safe Operating Stop), SLS (Safely Limited Speed),
SSM (Safe Speed Monitor) and SSR (Safe Speed Range) according to EN 61800-5-2. The actual
realisation of the safety functions has to be validated in each application of the product for safety
aspects.

VersiSafe Speed 7
Circuit Diagrams
Connection Terminals
Terminal designation Signal designation
A1+ DC24V
A2 0V
E1a, E1b, E2L, E2H, E3L, E3H Frequency measuring inputs
GND Reference potential for semiconductor monito-
ring output and control outputs
13, 14, 23, 24 Forcibly guided NO contacts for release circuit
38, 48 Semiconductor-monitoring output
T1, T2 Control output
RES, RF, SW1, SW2, SW3, SW4 Control input
A+, A GND Analogue output
M10823_d
T2
38
RF
48
E3H
13 23
14 24
K1
K2
RES
GND
A2
T1
GND
E1a
E1b
E3L
A1
+
E2H E2L
14
13 23 24
M10826_d
T2
38
RF
48
13 23
14 24
K1
K2
RES
T1
SW3SW2SW1 SW4
A
+
A
GND
E3H
A2 GND
E1a
E1b
E3L
A1
+
E2H E2L
14
13 23 24

8 VersiSafe Speed
Indicators
LED ON: green On, when supply connected
green-flashing Parameterization mode
red-flashing Parameterization error
LED K1/K2: green Relay K1 and K2 energized
yellow Muting (Relay K1 and K2 energized)
LED ERR: red Internal failure
red-flashing External failure
LED t: green-flashing (K1/K2; light up)
Delay times runoff tA or tU
yellow-flashing (K1/K2 does not light up)
Delay times runoff tF
yellow-flashing (K1/K2 light up)
Delay times runoff tV
DISPLAY: Status indication
Alarms / diagnostics
Parameterization
7. general description
7.1 Applications
Safe frequency monitoring of AC voltages
- Safe monitoring of the outputfrequency of inverters
- Safe monitoring of the rotorfrequency of slipring motors
- Safe control / monitoring of motorts in crane applications
- Safe monitoring of the direction of rotation with 3-phase AC voltages
With correct connection it is possible to realise with the UH 6937 the sa-fety functions STO (Safe
Torque Off), SOS (Safe Operating Stop), SLS (Safely Limited Speed), SSM (Safe Speed Monitor)
and SSR (Safe Speed Range) according to EN 61800-5-2. The actual realisation of the safety
functions has to be validated in each application of the product for safety aspects.

VersiSafe Speed 9
7.2 Features
• According to
For frequency monitoring:
- PL e and category 4 according to EN ISO 13849-1
- SIL 3 according to EN 61508
For monitoring the phase sequence or direction of rotation:
- PL d and Category 2 according to EN ISO 13849-1
- SIL 2 according to EN 61508
• Can be used in frequency monitoring security applications as follows:
- Up to maximum SIL 3 according to EN IEC 62061
- Up to SIL 3 according to EN 61511
• Can be used in safety applications of phase sequence or direction of rotation
monitoring as follows:
- Up to maximum SIL 2 according to EN IEC 62061
- Up to SIL 2 according to EN 61511
• Overfrequency, underfrequency or window monitoring of 1-phase or 3-phase AC voltages
• Monitoring of the direction of rotation with 3-phase AC voltages
• User-friendly front panel display
- For convenient, menu-guided parameterization
- For setpoint and actual value display of the frequency and direction of rotation
• Fast response time due to period measurement of the input frequency
• Universal measuring inputs for AC voltages from 8 ... 280 V for 1-phase monitoring and 16 ...
690 V for 1 and 3 phase monitoring
• Suitable for frequency converters
- 1 … 700 Hz
• Adjustable hysteresis
• Adjustable release delay from 0 ... 100 s for the frequency monitoring
• Adjustable start-up bypass time of 0 ... 100 s for frequency monitoring or tolerance when
switching on from 0 ... 60000 periods for direction of rotation monitoring
• Adjustable alarm delay of 0 ... 100 s for frequency monitoring or tolerance of 5 ... 60000 periods
for direction of rotation monitoring
• Alarm latch or auto reset
• Galvanic isolation between measuring input, auxiliary voltage and output contacts
• 2-channel structure
• Forced output contacts
• LED displays and 2 semiconductor message outputs
• 45 mm overall width
• • With plug-in connection blocks for quick device replacement
- Setting different response values by digital 4-bit selection possible from a higher-
level controller
- Analog output (2 ... 10 V) according to the current frequency
- Possibility of bridging the frequency and direction of rotation monitoring (muting)
- Adjustable switching time from 0 ... 100 s for frequency monitoring or tolerance
when switching from 0 ... 60000 periods for monitoring the direction of rotation

10 VersiSafe Speed
8. Notes
8.1 Frequency measuring input
The measuring input is divided up in to voltage ranges (AC 8 ... 280 V on E1a-E2L und E1b-E3L
and AC 16...690 V on E1a-E2H and E1b-E3H). If the measuring voltage is always higher then AC
16 V, the higher range should be used. A special dimensioned measuring input with low pass
characteristic avoids the measuring of the pulse frequency. In addition the input sensitivity is
adapted to the voltage-/frequency-characteristic of inverters.
Plesae make sure that the frequency measurement inputs must be connected to the same single-
phase or three-phase network and that a three-phase network is required to monitor the direction
of rotation.
8.2 Manual reset, automatic reset
In alarm storage mode, the reset input is provided for resetting the alarm status after overfre-
quency, underfrequency or after a direction error. If T1 is present at the input for longer than 1
second, a reset is carried out in the device. A new reset is only possible after the signal at the
reset input has been briefly interrupted. This input is not taken into account in auto-reset mode
because the reset is automatic.
8.3 Semiconductor outputs
The Semiconductor Output: 38 will indicate the status of the Relays: K1 / K2. When the relays are
energized, then the Semiconductor Output: 38 is switched on. The Semiconductor Output: 48 will
report errors within the equipment. Should an error actually exist, then the Semiconductor Output:
48 will be switched on.
The semiconductor outputs are not safety related. They can be used for monitoring purposes.
8.4 Setting the frequency thresholds
For the monitoring functions: „internal window monitoring function“ and in the „external window
monitoring function“, a minimum difference between the lower- and the upper -threshold of 5% is
to be anticipated at the upper frequency threshold, in addition to the already set hysteresis
parameter. This is internally verified during the setting of the speed threshold and an error
message will be displayed in case of any erroneous setting and/or the setting will not be permitted
by the display. The maximum settable lower frequency threshold can be calculated as follows:
Monitoring function: „Internal window monitoring“:
Maximum lower threshold =
upper frequency threshold - (5% + 2 x hysteresis) x upper frequency threshold Example:
Upper frequency threshold 100 Hz, hysteresis 2 %
Maximum lower frequency threshold =
100 Hz - (0.05 + 2 x 0.02) x 100 Hz = 91 Hz
Monitoring function: „External window monitoring“ :
Maximum frequency threshold =
upper frequency threshold - 5 % x upper frequency threshold Example:
Upper frequency threshold 100 Hz, any required hysteresis
maximum lower frequency threshold =
100 Hz - 0.05 x 100 Hz = 95 Hz

VersiSafe Speed 11
8.5 Feedbak circuit
The feedback contacts of external contactors are monitored on terminal RF. The terminal RF gets
the test signal from T2 via normally open contacts of the contactors which are connected to
terminals 14 and 24. The normally closed contact have to be closed to start the device. If no
contact extension or reinforcement is used, the terminals RF and T2 have to br bridged.
8.6 Start up time delay tA
The start-up bypass time expires after switching on the auxiliary voltage of the device as soon as
the feedback circuit RF is closed. In addition, the start-up delay expires after a reset in alarm
storage mode. During this time, there is no frequency evaluation, the LED "t" flashes and the
output contacts 13-14 and 23-24 remain closed (depending on the direction of rotation evalu-
ation). Due to the start-up delay z. B. an alarm message during the start-up phase of a generator
or motor can be suppressed. If the feedback circuit is not closed after a reset (during alarm
storage operation), the device goes into a safe error state.
8.7 Alarm delay tV
The alarm-delay time period will expire when the equipment has recognised, that the frequency
exceed the permitted range. Only after the expiry of the alarm-delay time period, will the output
contacts :13 to 14 and 23 to 24 be switched off. When the frequency again enter the permitted
range during the alarm-delay time period, then the alarm-delay function is terminated. The LED „t“
will flash during the time period.
8.8 Reset delay time tF
The release delay time is the time that elapses before the output contacts 13-14 and 23-24 are
switched through (depending on the evaluation of the direction of rotation) after a good status has
been recognized (frequency within the desired range). If the frequency goes back into alarm
(frequency outside the desired range) while the release delay time is elapsing, the release delay
is stopped. The LED “t” flashes while the time is running. The start-up bypass time has priority
over the enable delay time, i.e. if the output contacts are switched through by the start-up bypass,
the enable delay time is ignored (output contacts 13-14 and 23-24 closed). The release delay
time is also no longer started immediately after the start-up bypass time has expired.
8.9 Minimum frequency
The direction of rotation is only monitored above the set minimum frequency. If the frequency at
one of the two frequency measurement inputs is below this set minimum frequency, the direction
of rotation is considered correct.
8.10 Display
In normal operating mode, all settings can be checked at any time by pressing the UP or DOWN
keys.
Additionally, the frequency is displayed. However, this frequency does not correspond to the
device´s accuracy and is only designed for diagnostic purposes.
In the case of wiring errors and system failures corresponding diagnostic messages are displayed
on the display.

12 VersiSafe Speed
8.11 Parameterization using the display
overfrequency
underfrequency
window (inside)
window (outside)
f-monitoring off
Upper limit 1 400,0 Hz
Lower limit 1 200,0 Hz
clockwise rotation
reverse rotation
Direction of rotation off
overfrequency
underfrequency
window (inside)
window (outside)
f-monitoring off
Upper limit 2 400,0 Hz
2)
Lower limit 2 200,0 Hz
3)
clockwise rotation
reverse rotation
Direction of rotation off
overfrequency
underfrequency
window (inside)
window (outside)
f-monitoring off
Upper limit 3 400,0 Hz
2)
Lower limit 3 200,0 Hz
3)
clockwise rotation
reverse rotation
Direction of rotation off
overfrequency
underfrequency
window (inside)
window (outside)
f-monitoring off
Upper limit 4 400,0 Hz
2)
Lower limit 4 200,0 Hz
3)
clockwise rotation
reverse rotation
Direction of rotation off
Esc
parameterization
1.1
limits and direction of rotation
frequency mode 1
monitoring function 1
x
-
-
1.
-
-
f-limits 1
2)
3)
direction of rotation 1
-
-
x
frequency mode 3
monitoring function 3
x
-
-
frequency mode 2
1)
monitoring function 2
x
-
-
-
-
f-limits 2
-
-
f-limits 3
direction of rotation 3
-
-
x
direction of rotation 2
-
-
x
-
-
x
OK
frequency mode 4
monitoring function 4
x
-
-
-
-
f-limits 4
direction of rotation 4

VersiSafe Speed 13
Esc
0,0
0,0
0,1
0,0
Esc
0
10
0
Esc
alarm storage
automatic reset
Esc
activate
deactivate
Esc
Esc
Minimum frequency for
Direction of rotation
monitoring
discrepancy time
Esc
Esc
English
Deutsch
Français
Esc
Esc
1.2
hysteresis
5
%
alarm delay
s
switch override
1)
s
OK
1.3
times
start-up bridging
s
release delay
s
toggle Tolerance
1)
period(s)
OK
OK
1.4
tolerance of direction of rotation
start-up tolerance
period(s)
alarm tolerance
period(s)
1.6
mutingfunction
-
1)
x
OK
1.5
alarm storage
x
-
OK
OK
1.7
advanced settings
5 Hz
30,0 s
OK
OK
2.2
contrast
50
%
OK
OK
display settings
2.1
languages
x
-
-
2.

14 VersiSafe Speed
off
10 s
1 min
5 min
Esc
Manuell
10 s
1 min
5 min
Esc
Esc
Esc
Esc
Esc
2.3
lighting
-
x
-
-
OK
2.4
operation display
x
-
-
-
OK
OK
3.
parameter
display settings
parameter + display settings
OK
default settings
OK
4.
changes
4.1
lock
activate
4.2
pursue
activate
OK
1)
Only available in variant /_ _1.
2)
Not available with the "underfrequency" monitoring function.
3)
Customized variants have different factory settings.
4)
Customized variants have different factory settings.
These are available upon request.

VersiSafe Speed 15
To enter the device´s parameterization mode the following key combination is provided:
Press and keep pressed the right key at first. Then, press the left key (see below). A display test
follows and has to be acknowledged using the OK key (right key) when it was successful. Then, it
is possible to change the parameterization. Before the device adopts changed parameters, they
must be confirmed once more for safety reasons.
8.12 Change tracking
To detect non permitted changes of the settings, the menue item change tracking is available.
This setting allows to activate a counter once, which is then incremented with each confirmed
change of the settings. After ac-tivation of this function the user cannot reset the counter or
disable this function again.
M11262


2. 1.
actual frequency
100Hz

16 VersiSafe Speed
8.13 Digital selection via the software Inputs: SW1 to SW4
Four different frequency modes with different response values can be configured via the digital
inputs SW1 to SW4 (see table). The supply of the inputs must be between DC 10 V and DC 26.4
V to GND. Switching can also take place during operation. If the frequency mode is changed
during operation, the changeover time (tU) for the frequency evaluation and the changeover
tolerance (nU) for the direction of rotation evaluation expire, provided that the output relays are
switched through during the changeover and the start-up delay (tA) has expired. During the
changeover time or changeover tolerance, there is no frequency evaluation or direction of rotation
evaluation and the output relays remain energized. If the frequency mode is changed again while
the switching time or the switching tolerance is running, the switching time or the switching
tolerance is not restarted. After the switchover time or the switchover tolerance has expired,
monitoring is continued with the currently set frequency mode. Due to the switching time or the
switching tolerance, e.g. B. an alarm message during the run-up phase or braking phase of a
generator or motor can be suppressed..
Caution
Any continuously repeated switching over of the frequency modus (always
immediately after the expiry of the switcho-ver time period) can lead to the
situation, that the equipment starts to function similarly as in the „Muting
Mode“ (i.e. the frequency monitoring function is overridden and the output
relays remain permanently on).
SW1 SW2 SW3 SW4 Modus
0 0 1 1 Frequency mode 1
0 1 1 0 Frequency mode 2
1 0 0 1 Frequency mode 3
1 1 0 0 Frequency mode 4

VersiSafe Speed 17
9. Device and function description
9.1 Function Diagram
M11332
Threshold
Hysteresis
Overfrequency
Underfrequency
}
}Hysteresis
Threshold
U
U
(A1/A2)
H
Alarm memory
P
P
n
Monitoring function
“Overfrequency”
Output relay
K1/K2
“Underfrequency”
Monitoring function
M
“Inside range”
onitoring function
t = Start-up delay, t
AV
= Alarm delay, t = Response delay
F
tv
tv
tv
tv
tv
tA
tA
tF
tF
tF
tF
tF
tF
tA
M12555
U
U
(A1/A2)
H
direction of rotation
wrong
correct
alarm storage
* Depending on frequency monitoring
P
P
P
output relais
K1/K2 *
n =start-up tolerance
An = alarm tolerance
nvnv
nA
V

18 VersiSafe Speed
9.2 Muting function
The frequency monitoring or direction of rotation monitoring can be bridged using the display and
appropriate control of the digital inputs SW1-SW4. To do this, the muting function must be
activated during parameterization on the display. If this function is activated, it is still possible to
switch between frequency modes 1-3 as described above. If frequency mode 4 (muting) is
selected via the SW inputs, there is no longer any frequency monitoring or direction of rotation
monitoring, the output relays are permanently connected and the start-up delay (tA), switching
time (tU), release delay (tF), alarm delay (tV), start-up Tolerance (nA), switching tolerance (nU)
and alarm tolerance (nV) are reset.
9.3 Analogue output A+ and A GND
The analog output with 2-10 V is used to output the currently measured frequency. The maximum
value of the analog output (10 V) corresponds to the set upper limit (frequency threshold). The
minimum value of the analog output (2 V) corresponds to the set lower limit. The scaling is
frequency-linear.
In the "Underfrequency" monitoring function, the maximum value of the analog output corres-
ponds to the maximum adjustable response value of the device (version UH 6937/0_ _ = 600 Hz
and UH 6937/1_ _ = 1000 Hz).
In the "Overfrequency" monitoring function, the minimum value of the analog output corresponds
to 0 Hz.
If the muting function is selected or if frequency monitoring and direction of rotation monitoring are
deactivated, the maximum value of the analog output corresponds to the maximum adjustable
response value of the device (version UH 6937/0_ _ = 600 Hz and UH 6937/1_ _ = 1000 Hz) and
the minimum value corresponds to 0 Hz
In the event of an error, 0 V is output at the analog output.
The analog output is not safety-related and can be used for diagnostic purposes.
9.4 Switchover time period tU
The switching time expires when the frequency modes are changed during operation using the
digital inputs SW1-SW4, the output contacts are closed, no start-up delay is running and tU has
not already started or is about to expire. During this time, there is no frequency evaluation and the
output contacts are switched (depending on the direction of rotation evaluation).
10. Technical Data
10.1 Frequency Measuring Input
Voltage range
E1a-E2L, E1b-E3L: AC 8 ... 280 V
E1a-E2H, E1b-E3H: AC 16 ... 600 V
(dependent to frequency see characteristic)
Input frequency: < 700Hz
Galvanic separation: Frequency measuring input to
auxiliary voltage and output contacts
Response value einstellbar von 1 Hz ... 600 Hz

VersiSafe Speed 19
Pulse frequency inverters =>1 kHz
Measuring accuracy: <± 2%
Stability of the setting
threshold at variation of
auxiliary voltage and
temperature: < ± 1%
Hysteresis: adjustable from 2 ... 10 %of the set response value
Reaction time of
frequency monitoring: : Duration of 1 cycle (inverse value of adjusted frequency)
+ 10 ms + adjusted response delay
Reaction time of direction
of rotation monitoring: Duration of 1 cycle (inverse value of the applied frequency)
+ 10 ms + adjusted alarm tolerance
Alarm delay tV: adjustable from 0.1 ... 100 s
Start up time delay tA: adjustable from 0 ... 100 s
Reset delay tF: adjustable from 0 ... 100 s
Switchover time period tU:adjustable from 0 ... 100 s
Alarm-Tolerance nV: adjustable from 5 ... 60000 periods
Start-up-Tolerance nA: adjustable from 0 ... 60000 periods
Toggle-Tolerance nU: adjustable from 0 ... 60000 periods
Minimum frequency direction
of rotation monitoring: adjustable from 1 ... 100 Hz
Discrepancy time tD: adjustable from 1 ... 250 s
Accuracy of the
adjustable times: < ± 5%
Time between connection
of auxiliary supply and
ready to mesure: approx. 1.5 s (with start up delay is 0)
10.2 Auxiliary circuit (A1-A2)
Auxiliary voltage UH
(galvanic separation to
measuring input): DC 24 V
The power supply shall meet the requirements of
SELV / PELV.
Voltage range: 0.8 ... 1.1 UH
Nominal consumption: typ. 3.2 W
Short-circuit protection: Internal PTC
Overvoltage protection: Internal VDR
Duty-cycle Reset button: > 1,2 s
10.3 Output
Contacts: 2 NO contactsr
Contact type: Relay forcibly guide
Thermischer Strom Ith:8 A
(see current limit curve)
Switching capacity