wohner OMUS User manual

OMUS® user manual
Revision 8, March 2017
OMUS®
Electronic hybrid switch for resistive loads.
User manual
Revision 8, March 2017

OMUS® user manual
Revision 8, March 2017
Contents
1Design variants ....................................................................................................................................................... 38
2OMUS®Overview.................................................................................................................................................... 39
2.1 Application............................................................................................................................................................ 40
2.2 Incorporation of OMUS®into process control....................................................................................................... 41
2.3 Galvanic isolation & short-circuit protection ........................................................................................................ 41
2.4 Line protection...................................................................................................................................................... 43
2.5 Switching processes in the hybrid switch ............................................................................................................. 43
2.6 Adhering to limit values in switching processes ................................................................................................... 43
2.7 Adjustability of the power output......................................................................................................................... 46
2.8 Suitability of the application ................................................................................................................................. 47
3Safety instructions / Installation instructions.......................................................................................................... 48
4Product table.......................................................................................................................................................... 49
5Commissioning ....................................................................................................................................................... 50
5.1 Connections .......................................................................................................................................................... 50
5.2 Installing and connecting the main circuits........................................................................................................... 51
5.3 Meaning of the LED indicators.............................................................................................................................. 52
5.4 Disassembly and replacing devices ....................................................................................................................... 52
5.5 Replacing a fuse .................................................................................................................................................... 53
5.6 Checklist................................................................................................................................................................ 54
6User interface......................................................................................................................................................... 55
6.1 Front view ............................................................................................................................................................. 55
6.2 Overview of display functions............................................................................................................................... 56
6.3 Eplan symbol......................................................................................................................................................... 57
6.4 Switching variants ................................................................................................................................................. 58
7Configuration of OMUS®......................................................................................................................................... 59
7.1 Menu structure..................................................................................................................................................... 60
7.2 Three-phase settings............................................................................................................................................. 61
7.3 Single-phase settings ............................................................................................................................................ 62
7.4 Restoring to factory settings................................................................................................................................. 63
7.5 Standby ................................................................................................................................................................. 63
8Function description ............................................................................................................................................... 64
8.1 Auto(matic) mode................................................................................................................................................. 64
8.2 Settings menu ....................................................................................................................................................... 64
8.3 Manual mode........................................................................................................................................................ 64
8.4 Warning ................................................................................................................................................................ 65
8.5 Error...................................................................................................................................................................... 66
8.6 Acknowledgement of messages............................................................................................................................ 67
8.7 Interruption .......................................................................................................................................................... 67
9Technical data ........................................................................................................................................................ 68

OMUS® user manual
Revision 8, March 2017
1 Design variants
OMUS®30Compact
Type
Pack Size
Weight
kg/100
Part No.
OMUS®30Compact, IEC
1
45.2
36 152
OMUS®30Compact, UL and IEC
1
45.2
36 157
OMUS®60Classic
Type
Pack Size
Weight
kg/100
Part No.
OMUS®60Classic, IEC
1
45.8
36 153
OMUS®60Classic, UL and IEC
1
45.8
36 158
OMUS®CrossBoard
Type
Pack Size
Weight
kg/100
Part No.
OMUS®Crossboard, IEC
1
35.7
36 154
OMUS®Crossboard, UL and IEC
1
35.7
36 159

OMUS® user manual
Revision 8, March 2017
2 OMUS®Overview
OMUS®
Electronic hybrid switch for resistive loads.
The OMUS®electronic hybrid switch is a compact switching device with a width of 36 mm. The
hybrid switch is composed of a combination of relay contacts and power semi-conductors,
integrated short-circuit protection as well as electronic current and temperature monitoring for
operational switching of resistive loads (IEC up to 25 A / 400V AC; UL up to 20A / 480V AC).
The universal CrossLink-interface at the connection side enables fast electrical and
mechanical connection with various busbar systems.
Busbar adapter
(*version 30Compact)
Load plug
Esc / Reset button
Control plug
Hinged cover
Lead sealing

OMUS® user manual
Revision 8, March 2017
2.1 Application
The OMUS®hybrid switch has been developed for areas of application in which contactors,
overload relays, solid state relays and mechanical switches have previously been used.
This device was designed for the frequent switching of:
•single-pole resistive loads (phase-neutral) and
•three-pole resistive loads
This is a product for environment A (industry) regarding EMC. In environment B (household)
this device may cause undesirable interference; in this case the user has to find appropriate
counteraction to reduce electromagnetic interference. No powerful electrostatic charges may
be transferred to the OMUS®from the load side. An external switching element is required for
galvanic isolation. This could be a contactor or circuit breaker, for example. In a non-
operational status, the OMUS®error relay will issue a signal. In order to interrupt an
unintentional continuous current flow in case of an error, an external switchgear must ensure
the interruption of the load circuit. The short-circuit protection is implemented via integrated
fuses.
The combination of the functions
•Hybrid switch
•Feed
•Fuse
•Monitoring
enables a maximum space advantage in comparison to a group composition of three discrete
devices with comparable properties.

OMUS® user manual
Revision 8, March 2017
2.2 Incorporation of OMUS®into process control
OMUS®can be actuated with the help of a programmable logic controller (PLC). The precise
specification for the input signals of OMUS®is described in detail, in chapter 9 Technical data,
as well as in 2.5 Switching processes in the hybrid switch. The defined limit values such as a
maximum switching frequency of 1Hz and minimum on and off duration of 100ms must be
strictly adhered to in order to guarantee proper operation.
OMUS®possesses numerous self-diagnostic and safety monitoring mechanisms. Warnings
and errors are routed to the analysis unit via the signal relays.
The incorporation and active processing of the warning or error messages into the
corresponding control of the system is necessary in order to achieve the maximum
system dependability.
If the limit values are exceeded, e.g. the minimum switch on time, OMUS®has a software-
based self-diagnostic system, and will ignore unreliable control commands. The incorrect
actuation will not be issued by a signal.
2.3 Galvanic isolation & short-circuit protection
The device does not have an internal galvanic isolation. In the event of an error, OMUS®
switches off as normal without being fully galvanically isolated. An external switching
element is required for galvanic isolation. The galvanic isolation can be realized on the part
of the feed.
Galvanic isolation on the part of the feed:
load
load
load
load

OMUS® user manual
Revision 8, March 2017
The galvanic isolation can also be realized between OMUS®and corresponding load.
Galvanic isolation on the part of the load:
Common devices for the implementation of a galvanic isolation are contactors or circuit
breakers. In a non-operational status, the OMUS®error relay will issue a signal. In order to
interrupt an unintentional continuous current flow in case of an error, an external switchgear
must ensure the interruption of the load circuit.
The short-circuit protection is implemented via integrated fuses. An upstream short-circuit
protection module is only required from an uninfluenced short-circuit current ICP above 30kA.
For the UL design (with internal fuse Class CC 30A according to UL), an SCCR value of 30kA
was verified. The electronic hybrid switch OMUS®complies with coordination type 1.
load

OMUS® user manual
2.4 Line protection
The line protection of the connected line is realized by setting the correct current limit (16A,
20A or 25A). In order to ensure line protection with OMUS®depending on the configured
current, at least the following wire cross-sections at the load plug have to be adhered to. The
following values comply with the single installation of OMUS®. The specified wire cross-
sections are additionally depending on the deratings for side-by-side installation (see chapter
9 Technical data) and if necessary installation type!
Connected
wire cross-
section
Permitted
adjustable current
limits
Permitted load current
(load plug with screw
terminals
Art.-Nr. 36918)
**Permitted load current
(load plug with spring
terminals
Art.-Nr. 36916)
2,5mm²
16A, 20A
20A
16A
4mm²
16A, 20A, 25A
25A
20A
*6mm²
16A, 20A, 25A
25A
20A
*higher wire cross-section enables better heat dissipation
**spare component
If a wire cross-section below 2,5mm² is used, the line protection has to be realized either by
using smaller fuses within OMUS®or adapting the pre-fuse.
2.5 Switching processes in the hybrid switch
OMUS®combines the advantages of power semi-conductor and relay technology. The
interplay of both technologies is referred as hybrid switch.WhenOMUSswitches on, the semi-
conductor carries the current so that the relay can be switched on with low wear. The
continuous current thenflows through the relay, which generates significantly lower power loss
in comparison to the semi-conductor. When OMUS switches off, the semi-conductor once
again carries the current in the hybrid switch in order to open the relay contact with minimal
current arcing. In comparison to apurely relay solution, this functionality allows for a
significantly longer lifetime. Compared to apure semi-conductor solution, the hybrid switch
operates with much greater efficiency. The high degree of efficiency translates to lower power
loss in the device.
2.6 Adhering to limit values in switching processes
The electronics switch the load on and off at the zero crossing of the load voltage. The switch
on and off commands are carried out after a delay (max. 80ms). The minimum duration of the
switch on impulse has to be 100ms. The maximum switching frequency may not exceed 1Hz.
The minimum load current is 2A. The proper functionality of the device cannot be guaranteed
if the limit parameters are not adhered to. The electronics continuously monitor the
correct
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OMUS® user manual
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performance of the control commands and the power consumption in all phases. Switching
processes must be conducted in line with the following rules in order to achieve a high switch
rate, long lifetime and low power loss:
•Maximum switching frequency f1 Hz
•Minimum switch on duration tON 100ms
•Minimum switch off duration tOFF 100ms
•Minimum load current Inc min 2A
•Usage only with connected functional ground PE
(Input 2 control plug)
Note: Please complete commissioning in conjunction with working through the checklist in
subsection 5.6!
Example: Switch on and off process with minimum switching duration of 100ms:
Designation
Limit value
In example
tswitch on delay
max. 80ms
approx. 13ms
tswitch off delay
max. 80ms
approx. 17ms
tswitching signal(duration of the switch on impulse)
min. 100ms
approx. 100ms
tON: (Switch on duration of load)
min. 100ms
approx. 100ms
Power output 3-phase at 25A load current:
•20W power loss in continuous operation (all relays permanently on, tRelay ON >> 1s)
•temporary 3-fold power loss during switch on or switch off (tTriac ON)
tswitch on delay
tSwitching signal
tswitch off delay
tON

OMUS® user manual
Revision 8, March 2017
Exemplary switch on and off process with hybrid switches in detail (current flow)
Designation
Limit value
In example
tTriac ON (Switch on duration of Triac)
max. 20ms
approx. 8ms switch on
approx. 12ms switch off
tRelay ON (Switch on duration of relay)
min. 80ms
approx. 80ms
tON (Switch on duration of load)
min. 100ms
approx. 100ms
Example: Switching cycle with max. switching frequency 1Hz and min. switch on duration 100ms
Incorrect actuation (in this case: 2Hz) is ignored!
Designation
Limit value
In example
tPeriod min (Minimal period duration between
impulses)
min. 1000ms
approx. 1000ms
tOFF (Switch on duration of load)
min. 100ms
approx. 900ms
tTriac ON
tTriac ON
tRelay ON
tON
tON
tON
2Hz actuation
tPeriod min
tOFF

OMUS® user manual
Revision 8, March 2017
2.7 Adjustability of the power output
The adjustability of the power output of OMUS®occurs depending on the actuation. In
continuous operation, the consumer is continuously actuated. The output can be switched in
a timed manner to reduce the power output. The duty cycle Dis characterized by the
relationship between duration of the actuation impulse and period duration of the timing:
  

The actuation limit parameters must be adhered to for the timing of the output. The prescribed
minimum switching duration for the load of 100 ms results in a duty cycle of 10% for the
maximum switching frequency of 1 Hz.
   

  
 
The max. duty cycle in timed operation at a maximum switching frequency of 1 Hz is 90%:
   

  
 
The max. control accuracy is determined by supply frequency and switching frequency. At
50Hz-supply frequency and 1Hz-switching frequency the max. control accuracy Acc is:
   
     
The limits of the duty cycle are depending on determined min. switch on and off times (100ms)
and the variable switching frequency. At 1Hz-switching frequency the lower limit is 10%, the
upper limit is 90%. In order to achieve a finer duty cycle, the switching frequency must be
reduced. Example for 1% duty cycle:
Switching frequency to 0.1 Hz (10s period duration)
   

  
 
Example for 99% duty cycle: Switching frequency to 0.1 Hz (10s period duration)
   

  
 
The duty cycle at a switching frequency of 0.1 Hz is adjustable between 1% and 99% in 0.2%
steps.
Duty cycle
Switching frequency
tON
tOFF
Control accuracy
1%
0,1Hz
100ms
9900ms
0,2%
10%
1Hz
100ms
900ms
2%
54%
1Hz
540ms
460ms
2%
90%
1Hz
900ms
100ms
2%
99%
0,1Hz
9900ms
100ms
0,2%

OMUS® user manual
Revision 8, March 2017
2.8 Suitability of the application
The basis for the use of OMUS®in the planned application is operation within the following
limit parameters.
Electrical parameters OMUS®
Specification
Type of load
resistive loads
Max. load current Inc max
25A (IEC)
20A (UL)
Min. load current Inc min
2A (IEC)
2A (UL)
Max. operating voltage Ue
400V AC (IEC)
480V AC (UL)
Max. switching frequency f
1Hz
Min. switch on duration tON
100ms
Min. switch off duration tOFF
100ms
Max. switch on delay
80ms
Max. switch off delay
80ms
Actuation parameters (e.g. PLC)
Specification
Max. actuation impulse switching frequency fImpulse
1Hz
Min. duration of actuation impulse tSwitch on signal
100ms
Min. timeout duration tSwitch off signal
100ms
Parameter periphery
Specification
Evaluating the warning message
Detection and rectification of the
warning’s cause
Evaluating the error message
Using the error message contacts to
switch off the load
Switch off the load during an error
galvanic isolation via external
switchgear
The limit values of Electrical parameters OMUS®must be adhered to by the Actuation
Parameters in order to guarantee orderly operation. The parameters listed only constitute the
basis for possible use. Additional parameters must be observed for a successful application
(see chapter 9 Technical Data and 2.5 Switching processes in the hybrid switch).

OMUS® user manual
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3 Safety instructions / Installation instructions
Obey all national safety, accident prevention and industrial safety regulations when carrying
out work on the device. Failure to obey safety instructions may result in a good deal of property
damage, severe health damage or even danger to life and limb. The device may only be
commissioned, installed, modified and retrofitted by a trained electrician. Disconnect the
(busbar) system from the power supply before starting work on the device or the loads.
If the semi-conductor elements break down or the relays are stuck, the
electronics alone cannot turn off the load. In an irregular state, the error
relay issues a signal. The layout of the semi-conductor elements means
that there is no complete electrical isolation of the load from the main
supply. In order to interrupt an unintentional continuous current flow in
case of an error, an external switchgear must ensure the interruption of
the load circuit.
The safety regulations set out in DGUV V3 (BGV A3) areto be used for work. During operation,
parts of the electrical switchgear can carry dangerous voltage! Safety covers must not be
removed from electrical switchgear during operation. Keep the user manual in a safe place!
The device must not be installed in potentially explosive atmospheres. Obey the safety
regulations which apply to the installation and operation of related equipment. The device must
not be exposed to mechanical or thermal stresses which exceed the limits described in the
user manual.If necessary, the device may be installed in an appropriatehousing with a suitable
protection type (for example IP54) to IEC 60529 / EN 60529 to protect it from mechanical or
electrical damage. If the device is used in dusty environment, it must be installed in a suitable
housing (at least IP64) to EN 61241. Access to the circuits inside the device is not permitted
during operation. The equipment cannot be repaired by the user and must be replaced by an
equivalent device. Repair work may onlybe carried out by the device manufacturer. The device
conducts function self-diagnostics continuously during operation. A warning or error may be
signaled depending on the level of discrepancy between actual and nominal value. Only use
power supplies with safe isolation using PELV voltage to EN 50178 / VDE 0160 (PELV). This
prevents a short-circuit between the primary and secondary sides.

OMUS® user manual
Revision 8, March 2017
4 Product table
Type
Pack
Size
Weight kg/100
Part No.
OMUS®30Compact
Electronic hybrid switch IEC, 3-pole, complete with busbar adapter,
control and load plug and fuse links 32A gG, 10 x 38
1
45.2
36 152
Electronic hybrid switch UL and IEC, 3-pole, complete with busbar
adapter, control and load plug and fuse links Class CC 30A time
delay
1
45.2
36 157
OMUS®60Classic
Electronic hybrid switch IEC, 3-pole, complete with busbar adapter,
control and load plug and fuse links 32A gG, 10 x 38
1
45.8
36 153
Electronic hybrid switch UL and IEC, 3-pole, complete with busbar
adapter, control and load plug and fuse links Class CC 30A time
delay
1
45.8
36 158
OMUS®CrossBoard
Electronic hybrid switch IEC, 3-pole, complete with control and load
plug and fuse links 32A gG, 10 x 38
1
35.7
36 154
Electronic hybrid switch UL and IEC, 3-pole, control and load plug
and fuse links Class CC 30A time delay
1
35.7
36 159
Spare components
Busbar adapter 30Compact
1
7.2
36 155
Busbar adapter 60Classic
1
7.8
36 156
Load plug, 3-pole, spring terminals
1
1.5
36 916
Load plug, 3-pole, screw terminals
1
1.5
36 918
Control plug, 12-pole, spring terminals 0.2 – 1.5mm²
1
0.8
36 917
Fuse 32A gG, 10 x 38
10
0.6
31 189
Fuse Class CC, 30A, UL listed
10
0.8
31 252

OMUS® user manual
Revision 8, March 2017
5 Commissioning
Refer to the safety instructions and area of use.
5.1 Connections
Terminal assignment control cable
Connection
Designation
Function
1
Ui+24V DC
+24 V DC design control supply voltage
2
PE
Functional ground
3
E L2
Control input for L2
4
E (L1 + L2 + L3)
Control input for L1 + L2 + L3
5
Warning
Warning message output
6
(95) error
Error message output („on“)
7
Uimass
Ground control supply voltage
8
E L1
Control input for L1
9
E L3
Control input for L3
10
Mass inputs
Ground control inputs L1 + L2 + L3
11
(96) Warning + Error
Voltage input for message outputs
12
(97) error
Error message output („off“)
L2
L3
L1
Signal relay:
1) Warning off 2) Warning on 3) Error on 4) Error off

OMUS® user manual
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5.2 Installing and connecting the main circuits
Mounting on the busbar system:
Lock the complete module including the busbar
adapter to the rails. The electrical connection to
the three-phase conductors is made through
the adapter.
If necessary, adjust the busbar adapter's
feet for 10mm busbars beforehand.
CAUTION: Never carry out work when
the voltage is connected! Danger to life!
Connection plug:
Load plug:
Connect the load side conductors to the load
plug and lock it into the device.
Control plug:
Connect signal and control cables to the
control plug and lock it into the device.
Applying the operating voltage:
•Apply 24V DC operating voltage to the OMUS®!
•Apply voltage to the busbar system!

OMUS® user manual
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5.3 Meaning of the LED indicators
•Auto(matic) mode: LEDs permanently green (compare chapter 6.2 Overview of display
functions)
•Warning: LEDs orange
•Error: LEDs red + OMUS®switched off
5.4 Disassembly and replacing devices
Disconnect power to the busbar system, obey safety instructions!
Remove the control plug:
Remove the load plug
Remove the OMUS®from the adapter
Remove the busbar adapter from the system:

OMUS® user manual
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5.5 Replacing a fuse
Disconnect power to the busbar system, obey safety instructions!
Remove the OMUS® from the adapter: Open fuse cover:
Exchange fuse: Do not exchange the fuse before dismantling!
Snap the OMUS®onto the adapter: Snap the OMUS®onto the CrossBoard®:
Pay attention to the right position of the lock slide (compare assembly stage 5) and the reverse
polarity protection!
6.

OMUS® user manual
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5.6 Checklist
Work through the following checklist at the end of commissioning and check all corresponding
points to guarantee the safe operation of the device.
Parameter
Description
Status
Fuse
Fuses in place and functional

Busbar adapter
Correct locking with the system

Load plug
Correct locking and cabling of the load plug

Control plug
Correct locking and cabling of the control plug

Control voltage
Operating voltage applied, power supply adequately designed

Functional ground
PE is connected to input 2 of the control plug

Voltage load
Supply voltage is applied

Switching variant
Suitable application (compare chapter 6.4)

LED status
Main LED and parameter LEDs show permanent green light

Warning
Warning signal relay wired and inactive

Error
Error signal relay wired and inactive

Actuation
Actuation within the prescribed parameters

Operating mode
Auto(matic) for using the control inputs or Hand (manual mode)

Current limit
Current limits set according to outlet cable

Min. load current
The load current is at least 2A in rated operation


OMUS® user manual
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6 User interface
6.1 Front view
•Normal operation: LEDs permanently green (compare chapter 6.2 Overview of display
functions)
•Warning: LEDs orange
•Error: LEDs red + OMUS®switched off
Change button
Manual LED
L1
Auto(matic) LED L1
Main LED L1
Current limits 16A, 20A, 25A
Hand ON button L1
Enter button
Select button
Esc / Reset button