Reer SV MR0 U User manual

8541100 - 14/10/2022 - Rev.3
1
Installation Instructions
Safety Speed Monitor
SV MR0 U
(Original instructions)

SAFETY SPEED MONITOR SV MR0 U
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Contents
Preliminary note..............................................................................................................................................4
Symbols used ...................................................................................................4
Safety instructions ...............................................................................................5
General requirements on the safety-related functions ........................................5
Operation ............................................................................................................6
General function description .............................................................................6
Switching function: UNDerspeed .......................................................................6
Hysteresis.........................................................................................................7
Initialisation......................................................................................................7
Installation.........................................................................................................................................................8
Mechanical installation of the device ....................................................................8
Electrical Connections ..........................................................................................9
Terminals .........................................................................................................9
Set up of the device ...........................................................................................11
Automatic/Manual mode selections.................................................................14
Enable input: ..................................................................................................17
Technical data SV MR0 U .......................................................................................................................... 18
Definition of the LED’s ....................................................................................19
Faults (blinkings) ............................................................................................19
Additional notes ................................................................................................20
Pulse inputs, pulse pick-ups............................................................................20
Switching outputs: ..........................................................................................20
Restart command:...........................................................................................20
Fault output:...................................................................................................20
UNDerspeed output: .......................................................................................20
Feedback circuit:.............................................................................................20
Checklist after installation..................................................................................20
Warranty............................................................................................................21
EC Declaration of Conformity................................................................................................................. 22
UKCA Declaration of Conformity........................................................................................................... 23

SAFETY SPEED MONITOR SV MR0 U
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SAFETY SPEED MONITOR SV MR0 U
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PRELIMINARY NOTE
The instructions are part of the unit. They are intended for authorised persons
according to the EMC and Low Voltage Directive and safety regulations.
The instructions contain information about the correct handling of the product. Read
the instructions before use to familiarise yourself with operating conditions,
installation and operation. Adhere to the safety instructions.
SYMBOLS USED
Instructions
> Reaction, result
Cross-reference

This safety alert symbol indicates a potential personal safety hazard.
Failure to comply with instructions bearing this symbol could pose a
very serious risk to personnel.
➔
Information
Supplementary note.

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Safety instructions
Follow the operating instructions.
•Improper use may result in malfunctions of the unit. This can lead to personal
injury and/or damage to property during operation of the machine. For this
reason note all remarks on installation and handling given in these instructions.
Also adhere to the safety instructions for the operation of the whole installation.
•In case of non-observance of notes or standards, specially when tampering with
and/or modifying the unit, any liability and warranty is excluded.
•The unit must be installed, connected and put into operation by a qualified
electrician trained in safety technology.
•The applicable technical standards for the corresponding application must be
complied with.
•For installation the requirements according to EN 60204 must be observed.
•Connect and lay all cables according to EN ISO 13849-2 D.5.2 (Safety of machinery
- Safety-related parts of control systems).
•In case of malfunction of the unit please contact the manufacturer. Tampering
with the unit is not allowed.
•Disconnect the unit externally before handling it. Also disconnect any
independently supplied relay load circuits.
•After setup the system has to be subjected to a complete function check.
•Use the unit only in specified environmental conditions (→Techical data).
In case of special operating conditions please contact the manufacturer.
•Use only as described below.
GENERAL REQUIREMENTS ON THE SAFETY-RELATED FUNCTIONS
The device complies with the functional and organisational requirements of
EN ISO 13849-1 Performance-Level "e" and of EN 62061 SIL "3".

To maintain Safety Integrity Level (SIL) "3" requirements the two input
sensors shall be independent.
•Common cause failures between measuring sensors must be excluded
by observing an appropriate cable installation (i.e. separate cable paths).

To maintain the category 4 requirements during longer periods of
standstill, a forced dynamisation (t<24h) has to be carried out.

SAFETY SPEED MONITOR SV MR0 U
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Operation
GENERAL FUNCTION DESCRIPTION
The speed monitor is a two-channel pulse evaluation system for safe underspeed
detection.
To do so, it receives the pulse sequences from the pulse pick-ups connected to the
inputs. The module calculate the resulting frequency.
By continuously comparing the input frequency (actual value) and the switch point
(preset value) the evaluation system promptly detects underspeed of the set switch
point, and the output relays switch according to the preset switching function.
The preset value is achieved by setting the 3 switches located in front of the module.
The value can be set in “rpm” or “Hz” unit.
The device complies with the functional and organisational requirements of
EN ISO 13849-1 Performance-Level "e" and of EN 62061 SIL "3".
SWITCHING FUNCTION: UNDERSPEED
The output relays energise when the event occurs (10 seconds timer activated).
The relays remain ON again until the frequency value is greather that the selected
values. The NO contacts of the internal relays are connected in "series" and
connected to the terminals. If both relays are energised, the current paths are closed
so that (e.g.) a power contactor can be controlled.
If the frequency value decreases below the Fuh value the current paths open.

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HYSTERESIS
The hysteresis determines the distance between the switch point (open the current
paths) and the switch-on point (close the current paths).
The hysteresis value is fixed at 5 %.
If the input frequency falls below the set switch point by 5 %, the relays are de-
energised and the current paths are open.
Example with switch point Fu = 1000 (rpm):
•the current paths are closed when the input frequency is over Fu;
•the current paths will be open when the measured value is lower than Fuh (in this
case 950 rpm).
INITIALISATION
Directly after power on, the SV MR0 U carries out an initialisation comprising a
complete self-test.
After approx. 3 s the SV MR0 U is ready for operation.

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INSTALLATION
Mechanical installation of the device
Mount the device on a DIN rail in a housing protected against dust and humidity
(min. IP 54).

Leave enough space between the unit and the top and bottom of the
housing to enable air circulation and to avoid excessive heating.

Take into account the internal heating of all units when mounting several
units side by side. The environmental conditions must be observed for
every unit and, in order to avoid overheating, maintain between them one
minimal distance of 2cm.
Fasten the units to the rail.
Lock it first on the upper side of
the rail.
Pull down the locking latch on the
back of the unit.
Press the unit gently and release
the latch until you feel it snap
into place.
To remove a unit, use a
screwdriver to pull down the
locking latch on the back of the
unit; then lift the unit upwards
and pull.

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Electrical Connections
Voltage supply
sensors:
+24VDC: max. 70mA, protected (by a resettable fuse at T=20 °C), short-circuit
proof, not monitored. Ground: directly connected to the device ground.
Sensors:
PNP sensors, bounce-free.
Feedback circuit:
Yes - Max. 100 mA, short-circuit proof.
Enable input:
Yes - Via the enable input is possible to switch off the limit value monitoring.
Diagnostic output:
Positive switching transistor output. Max. 100mA, short-circuit proof.
Fault output:
Positive switching transistor output. Max. 100 mA, short-circuit proof.
Enable path:
2 x NO - Potential free - Max. 6A (protected with external 3.6 A).
Supply voltage

Connect the supply voltage of the device to terminals L+ and L-.
The nominal voltage is 24VDC. This voltage may vary between 19.2 V and
28.8 V incl. 5% residual ripple.
PELV power supplies are to be used (EN 60204-1).
TERMINALS
➔
The electrical input signals meet the requirements of EN61131.
➔
Terminal tightening torque: 5÷7lb-in (0,6÷0,7 Nm).

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Terminal connection: "UPPER SIDE"
A1
1
Operating voltage (+24VDC )
2
Sensor1 supply (+24VDC)
3
Sensor1 supply (GND)
4
Sensor1 input
A2
9
Operating voltage (GND)
10
Sensor2 supply (+24VDC)
11
Sensor2 supply (GND)
12
Sensor2 input
A3
17
current path 1A (relay contacts)
18
-
19
-
20
current path 1B (relay contacts)
Terminal connection: "LOWER SIDE"
C1
5
enable plus-switching
6
enable ground-switching
7
Automatic mode selection
8
Manual mode selection
C2
13
transistor output "Fault"
(Fault output (13))
14
transistor output "Underspeed"
15
feedback circuit output
16
feedback circuit input
C3
21
current path 2A (relay contacts)
22
-
23
-
24
current path 2B (relay contacts)
➔
The relay contacts of the module shall be supplied by the same source.