Guard master MINOTAUR MSR22LM User manual

LIGHT CURTAIN RELAY, MUTE and PSDI MODULE
MINOTAUR
MSR22LM
Approvals and marking
Typical Applications
Indicators
Block diagram
Terminal Identification
ATTENTION
X44
S12 S14
galvanic separation
S41 S42S44S43
monitoring
logic 1
monitoring
logic 2
galvanic
separation
galvanic
separation
48 58
K1 K1 K2K2Run1 Run2
K1
K2
PTC
A2A1+ M2M1 13 23
31
14 24 32
S31S32S34 S33S21S22S24 S23
118mm (4.6in) 45mm (1.8in)
86mm
(3.4in)
ET
M1 X44
A1+
S23S24S221
13S21S14S1248
58A2-
3123
2414S41
S33S31M2
S34S32
S44S42 S43
32
Lower green LEDs K1, K2
Upper yellow LED Run1
OSSD output 48:
upper yellow LED run 2:
OSSD output 58:
- on, when K1 and K2 are energised
- permanent on, when relay K1 and K2 are energised
- flashes with 1 Hz when the unit waits for the start signal after
fault free operation (power up of the unit)
- flashes fast with approx. 3 Hz when the start button is
pressed and all conditions for an override are fulfilled during
muting
- flashes fast with approx. 3 Hz when at stepping operation the
unit waits for interruption of the light curtain
- flashes with failure code to indicate normal indication states
that disable the energisation of the output relays (e.g. after
not allowed interruption of the light curtain) until the start
button is pressed
- flashes with failure code to indicate special failures (e.g.
undervoltage)
- off, when unit is on special failure mode -normally off when
relays K1 and K2 are energised -continuously on, when unit
in muting mode -shows the same failure codes as LED run 1
(except on special failures)
-permanent on, when unit operates correctly -flashes with
failure code to indicate special operation failures (e.g.
undervoltage)
-off, when unit is on special failure mode
-off, when relays K1 and K2 are energised -symmetric
flashing, when a normal functional state is active that disables
the energisation of the output relays (e.g. not allowed
interruption of a light curtain)
-permanent on, when waiting for start
1. Installation, setup, and checkout must be carried out by qualified personnel.
2. Before removing the front plate the person must be discharged to
ground.
3. The muting lamp must conform to IEC/EN61496-1 section A.7.4.
4. Performance checks should be performed at least every 6 months and
should include verifying lock outs under single fault conditions.
1
Features
Dimensions
According to EU-directive for machines 98/37/EG
According to IEC/EN60204-1, DIN VDE0113-1, EN954-1, IEC/EN61946-1,
IEC60947-5-1
Safety Category 4 according to EN954-1
Operations (switch selectable)
- Guard Only
- Muting
- Presence Sensing Device Initiation (PSDI)
- Protective operation with muting, e.g. conveyors
- override function via start button
- Stepping operation, e.g. on presses
- 1, 2 or 3 steps possible
- setting of number of steps possible via selector switch
Maximum Connections
- 3 light curtains 2-channel or
- 2 light curtains 2-channel, and 2 muting sensors, 1-channel or
- 1 light curtain 2-channel and 4 muting sensors, 1-channel or
-2 light curtains and key switch for PSDI operations
Outputs
- 2 NO safety, voltage free
- 1 NC auxiliary, voltage free
Response Time: 30ms
Suitable to connect light curtains of type 4 or self-testing light curtains of type 2,
according to IEC/EN61496-1, Crossfault monitoring must be performed by the
light curtain.
Robot cells
Mechanical power presses
Hydraulic presses
Press brakes
Material handling
Conveyors
Packaging machines
Moulding machines
ATTENTION - Not all MSR22LM
functions apply to all applications.
Check applicable standards.

Technical Data
Front plate
03
6
03
6
03
6
03
6
CH1 CH2
10
1
Inside view
Switch 1
Switch 10
The function setting is made by 4 rotational switches behind the front plate
(see figure above). The switches on the left make the setting for processor 1
(LED run 1) and the switches on the right for processor (LED run 2). The
same functions must be set for both processors. On the upper switches (1)
the main function is adjusted. On the lower switches (10) the setting of the
muting time (Protective operation) or the number of breaks (PSDI
operation) is adjusted.
On muting or stepping function the light curtains LC 2 and LC 3 are
always in protective operation with manual start.
9
99
9
2
Input
Rated operational voltage Ue: 24 VDC
Voltage range: 0,85 ... 1,15 Ue
( at max. 5 % residual ripple)
Nominal consumption: max. 170 mA
(no load on semiconductor outputs)
Control voltage on
S21, S23, S31, S33, S41,
S43, S48, S58: 23 VDC at Ue
Control current on
S12, S14, S22, S24,
S32, S34, S42, S44: each 4,5 mA at UN
Min. voltage on terminals
S12, S14, S22, S24, S32,
S34, S42, S44: 16 VDC
Short circuit protection: internal with PTC
Min. current on M1, M2: 25 mA with active lamp
Max. current on M1, M2: 100 mA with active lamp
Output
Contacts: 2 NO Safety, 1 NC Auxiliary
Contact type: Relay, positive guided
Delay at powerup
Manual start max. 50 ms
Automatic start max. 1.5 s
Automatic restart max. 55 ms
Response time: max. 30 ms
(max. 50 ms when failure on LC and
only one input channel de-energises)
Output voltage: AC 250 V
DC: see Arc limit curve
Switching of low loads: >100 mV
Thermal current Ith: 5A
Switching capacity
AC 3 A / 230 V IEC/EN60947-5-1
for NO contact
AC 2 A / 230 V IEC/EN60947-5-1
for NC contact
Electrical life
to AC 15 at 2 A, AC 230 V: 105switching cycles IEC/EN60947-5-1
Max. switching frequency: 1 200 switching cycles / h
Short circuit strength
max. fuse rating: 6 A gL IEC/EN60947-5-1
line circuit breaker: C 8 A
Mechanical life: 10 x 106switching cycles
Semiconductor outputs
Output (terminal 48 and 58): Transistors, PNP outputs
Output Voltage: 24VDC
100mA max. continuous current,
400mA max. for 0.5s internal short circuit
overtemperature, and overload
protection
Arc limit curve under resistive load
safe breaking, no continuous arcing under the curve, max.1 switching cycle/s
Switching current I [Amps]
Switching voltage U [Volts]
0
50
100
200
250
150
12345678
General data
Temperature range: 0˚C (+32˚F) to + 50˚C (122˚F)
Degree of Protection: Must be installed in IP54 housing
Housing: IP40
Terminals: IP20
Housing Material: Thermoplastic UL94VO rated
Vibration: 0.35mm, 10-55Hz
Shock: 10g, 16ms, 1000 per axis, 3 axis
Wire Connections: 1 x 2,5mm2stranded ferruled (14AWG)
1 x 4mm2solid (12AWG)
2 x 1,5mm2stranded ferruled (16AWG)
Mounting: 35mm DIN rail
Weight: 320g (0.71lbs)
•Automatic start
On automatic start the contacts K1 and K2 are energised when the light
curtain that is set for auto start is free after interruption. It is necessary
that the other light curtains with manual start are not interruped.
•Manual start
On manual start the contacts K1 and K2 are energised when the light
barrier that is set for manual start is free after interruption and the start
button is pressed. (3) .
The start button must be activated in 2 conditions:
- after return of the supply voltage (1)
(when minimum 1 light curtain is programmed for manual start)
- when 1 light curtain with manual start was interrupted (3)
1
2
3
Power supply
(A1/A2)
Start/Restart
button (S43/S44)
LC1 (S12/S14)
LC2 (S22/S24) or
LC3 (S32/S34)
K1, K2
(13-14, 23-24, 33-34)
Start/Restart Required (58)
:on: flashing: dark
Operation modes

3
When a failure is detected the relays K1, K2 are de-energised. The
different failures are indicated by different flashing codes on the LEDs
run 1 and run 2. The failures are split into 2 groups.
Failure group 1:
System failure
On occurrence of such a failure the unit locks out and shows the failure
code, the module can only be reset by switching the unit off and on
again. These failures are only indicated on LEDs run 1 and/or run 2. At
the same time 2 different codes can be indicated on the 2 LEDs. The
outputs (48 and 58) are always off in this state.
Failure group 2:
Function failure
These failure codes are only displayed on LED run 1 and output 48 while
LED run 2 remains on permanently. The relays K1, K2 are de-energised
in this state, the module is still active and the relays can be activated by
pressing the start button after the failure has been removed.
No. of
Flashes Description Measures and hints
0 Internal fault (LEDs off) If both LEDs are off the relay is
defective and has to be sent back for
examination.
5 Faulty setting 1) The switches on both channels are
not identical.
2) The selected setting is not allowed.
6 Undervoltage detection 1) The left LED is flashing when the
voltage drops under the allowed
level of < approx 0,85 UN. After
every display cycle the voltage is
measured again. Has it returned to
normal a reset is made (similar to
power up of the unit).
Overvoltage detection 2) The right LED is flashing when the
voltage rises over the allowed
level of >approx. 1,15 Ue+5%
residual ripple.
7 Input fault 1) A short circuit occurred on the
start button or machine contact.
2) Both signals of one LC are not
identical (short circuit, broken
wire or non-functioning LC).
8 Fault on output contacts Check the output circuit and
K1, K2 contact current.
9 Internal fault Try to evaluate the circumstances that
10 led to this fault.
11
12 Internal fault Replace unit.
13
Diagnostics
No. of
Flashes Description Measures and hints
1 LC failure 1) One LC has been interrupted.
2) All LC inputs that are not used
must be bridged: LC 2: S21-S22,
S23-S24 LC 3: S31-S32, S33-S34
2 Failure on start button 1) During start up of the unit and
initialising the start button must not
be pressed.
2) The start button must not be
pressed longer than 3 s.
3 Protective operation 1) An operating mode with feed back
failure in feed back circuit is selected and the circuit
circuit. connected to S41-S42 is not
closed before activation of K1, K2.
3 Stepping operation 1) The machine contact is not closed
contact failure in initial position (waiting for start).
2) With contact type 1 the machine
contact was not closed at the end of
the required first interruption of the
light curtain.
4 Muting failure 1) The selected max. muting time had
(blocked LC) been exceeded (muting lamp on).
4 Muting failure (lamp) 2) The muting lamp is not connected
between terminals 48 and M1 and M2.
3) The necessary bridge is not
connected between terminal S41-
S42.
4) The muting lamp is defective.
5) The measuring circuit for the
muting lamp is defective, the unit
has to be repaired.
5 Stepping operation key failure 1) Both contacts of the key switch to
select the number of steps are open
Run 1 and output 48 are flashing fast with 3 Hz
Muting operation: Minimum one muting sensor is
Override possible active, LC 1 is interrupted
and the start button is pressed.
After 3 s with activated start
button the override is started
for max. 12 s.
Stepping operation: The unit is waiting for the
Wait for access required number of interruptions of
the LC so that the
safety relays can be activated.
System failure: (indicated only on LED's run 1 and/or run2)
Function failure: (indication on LED run 1 and output 48)
Status Indication

4
Guard Only Mode
LC1
+
-
S21 S22
S12 S14 S31 S32 S34 S33S24 S23
Transmitter
Typical Application
Unused inputs linked
MSR22LM
Automatic Restart LC1
Schematic 1 shows a typical guard only mode application using three light
curtains with automatic restart of LC1 selected.
1. After powerup, the Start/Restart Required lamp will turn on. Press and
release the Start/Restart button. Upon release, K1 and K2 energize if all
three light curtains are clear.
2. Interrupting LC1 causes K1 and K2 to de-energize and Start/Restart lamp
flashes.
3. Clearing LC1 automatically causes K1 and K2 to energize as long as LC2
and LC3 are clear.
4. Interrupting LC2 or LC3 causes K1 and K2 to de -energize and the
Start/Restart lamp flashes.
5. After clearing LC2 or LC3, press the Start/Restart button to energize K1
and K2.
Manual Start/Restart
Schematic 2 shows a typical guard only mode application using three light
curtains with manual start/restart selected.
1. After powerup, the Start/Restart Required lamp will turn on. Press and
release the Start/Restart button. Upon release, K1 and K2 energize if all
three light curtains are clear. The Start/Restart lamp turns off.
2. Interrupting LC1, LC2 or LC3 causes K1 and K2 to de-energize and the
Start/Restart lamp flashes.
3. The Start/Restart Required lamp turns on when the light curtains are
cleared.
4. Press and release the Start/Restart button to energize K1 and K2. The
Start/Restart Lamp turns off.
LC1
+
-
S21 S22
S12 S14 S31 S32 S34 S33S24 S23
Transmitter
MSR22LM
Interlock or e-stop inputs
ATTENTION:The MSR22LM
does not detect crossfaults.
Unused Inputs
Unused inputs must be linked or can be used as dual channel, normally
closed, direct opening gate interlocks or e-stops, if allowed by a risk
assessment. Crossfaults (shorts between S22 & S24 and S32 & S34) are
not detected.
Protective operation
e.g. light curtains to secure dangerous areas
•Connection up to 3 light curtains
•Manual or automatic start possible for each light curtain
•With or without feedback input for external contactors
1
3
5
Power supply
(A1/A2)
Start/Restart
button (S43/S44)
LC1 (S12/S14)
LC2 (S22/S24) or
LC3 (S32/S34)
K1, K2
(13-14, 23-24, 33-34)
Start/Restart Required (58)
:on: flashing: dark
1
2
4
Power supply
(A1/A2)
Start/Restart
button (S43/S44)
LC1 (S12/S14)
LC2 (S22/S24) or
LC3 (S32/S34)
K1, K2
(13-14, 23-24, 33-34)
Start/Restart Required (58)
:on: flashing: dark
0
LC1
LC2
LC3
Auto
Manu
Manu
Manu
Manu
Manu
Manu Manu
Manu
Auto
Auto
Auto
Manu
Auto
not
allowed
(fault 5)
without feedback
input
with feedback
input
Auto
Auto
Auto
Auto
Auto
Manu
Manu
Manu
Manu
Manu
Manu Manu
Manu
Auto
Auto
Auto
Manu
Auto
Auto
Auto
Auto
Auto
LC1
LC2
LC3
1
Switch 1
Switch 10: Start mode and feedback input
10324 657 98
Protective operation without muting
3
2
4

5
Schematic 1: Typical guard only mode with 3 LCs and Auto Restart LC1
Schematic 2: Typical guard only mode with 3 LCs and Manual Start/Restart, setting with feedback input
Auxiliary Circuit
(Alarm Or Indication)
Power
Maintained
Push Button
A1 3113 23
A2 M1 M2 48 58 S41 S42 S43 S44
S12 S14 S21 S22 S23
X44
S24 S31 S32 S33 S34
3214 24
K3 K4
MSR22LM
Auto Restart LC1
with Feedback
24V DC
24V Ground
SENDER
OSSD 1
OSSD 2
RECEIVER
SENDER
RECEIVER
SENDER
RECEIVER
Light Curtain LC3
Start/
Restart
Momentary
Push Button
OSSD 1
OSSD 2
K3(Aux)
K4(Aux)
Machine
Start
Momentary
Push Button
Machine
Stop
Momentary
Push Button
K1
K2
00
7
7
Light Curtain LC2
OSSD 1
OSSD 2
Light Curtain LC1
Start/Restart
Required
Start/Restart
Required
M
K3
K4
L1 L2 L3
Contact
Protection
e.g. Thermal
Cut Out
Fuses
Safety Contactors
or Safety Control Relays
Auxiliary Circuit
(Alarm Or Indication)
Power
Maintained
Push Button
A1 3113 23
A2 M1 M2 48 58 S41 S42 S43 S44
S12 S14 S21 S22 S23
X44
S24 S31 S32 S33 S34
3214 24
M
K3
K4
L1 L2 L3
Contact
Protection
e.g. Thermal
Cut Out
Fuses
K3 K4
MSR22LM
Manual Start/Restart
with Feedback
24V DC
24V Ground
SENDER
OSSD 1
OSSD 2
RECEIVER
SENDER
RECEIVER
SENDER
RECEIVER
Light Curtain LC3
Start/
Restart
Momentary
Push Button
OSSD 1
OSSD 2
K3(Aux)
K4(Aux)
Machine
Start
Momentary
Push Button
Machine
Stop
Momentary
Push Button
K1
K2
11
5
5
Light Curtain LC2
OSSD 1
OSSD 2
Light Curtain LC1
Safety Contactors
or Safety Control Relays

6
Muting Mode, 2-Sensor
Internal Switch Settings
Sequence: MS1⇓ MS2⇓ muted LC1⇓⇑ MS2⇑MS1⇑
⇓= signal interrupted ⇑= signal present
Machine
muted LC1
MS1 MS2
Material Conveyor
Muting lamp
LC2
Muting
Muting is the temporary, automatic disabling of the protective function of a
light curtain. This function is used to transport material through a light
curtain without stopping the machine. The differentiation between material
and persons is done by muting sensors, which have to create a certain
switching together with the light curtain when material passes through the
light curtain.
The muting cycle is indicated by a muting lamp that is controlled and
monitored by the MSR22LM. The maximum muting time can be set in 10 steps
between 10s and infinite. The muting lamp current range is 25 Ma to 100 Ma.
If the light curtain is still interrupted after the max. permitted muting time e.g.
by blocked material the contacts K1, K2 open and the muting lamp as well as
the LED run 1 show failure code 4.
2-Sensor Muting
Light curtain LC1 and the muting sensors must be arranged according to
the Setup diagram. Setup must take into account material size, shape and
speed.
Schematics 3 and 4 show typical applications for 2 light curtains with 2-
sensor muting. For both applications, LC1 is the only light curtain muted.
LC2 functions in guard only mode in both schematics. For both
applications, the Start/Restart button must be pressed and released to
energize K1 and K2 after power is applied. If LC2 is not needed, then
links, e-stops, or interlocks are needed on terminals S21/S22 and S23/S24
(see Unused Inputs on page 4).
Schematic 3 shows the setup for automatic restart of LC1. If LC1 is
interrupted during a non-muting sequence, the MSR22LM de-energizes K1
and K2. When LC1 is cleared, K1 and K2 are automatically energized (if
LC2 is also clear). Interrupting LC2 de-energizes K1 and K2. After
clearing LC2, the Start/Restart button must be pressed and released to
energize K1 and K2.
Schematic 4 shows the setup for manual start/restart. If LC1 or LC2 are
interrupted and then cleared, the Start/Restart must be pressed and
released to energize K1 and K2.
Setup
ATTENTION: The muting sensors must be arranged so a
person cannot activate the muting sensors in the same switching sequence
as the material and enter the area when the hazardous condition exists. To
help accomplish this, the user can select either 2-sensor or 4-sensor
muting. Additional guarding may also be necessary. 1. After powerup, the Start/Restart lamp turns on. Press and release the
Start/Restart button. Upon release, K1 and K2 energize if both light
curtains and the muting sensors are clear.
2. The muting sequence starts by blocking sensor 1, then sensor 2. After
sensor 2 is blocked, the muting lamp turns on.
3. LC1 is muted and the material must break LC1 within 3.05s.
4. As the material passes LC1, it must clear sensor 2 and then sensor 1.
If the muting cycle is not completed in the proper sequence or within the
set time limits, the MSR22LM will go in to a lockout state with K1 and K2
de-energized and the amber RUN LED's flashing. See the Diagnostics
section on page 4 for troubleshooting hints.
2-sensor muting allows the material to move through LC1 in both the
forward and reverse directions.
Timing Diagram
If the monitored area is blocked by transported material and the outputs
K1, K2 are switched off, this is indicated by fast flashing (approx. 3 Hz) of the
muting lamp. The operator can activate the outputs K1, K2 by pressing the
start button for more than 3 s for a maximum time of 12 s until the muting
sensor are again inactive or the start button is released again.
Override
LC, muted
Muting sensor 1
Muting sensor 2
Muting lamp
Muting lamp monitoring
t < 50ms
2
t < 50ms
2
t < 30ms
1
t< 30ms
1
t < muting time (a)
30ms ≤t
t < synchronization
time (b)
30ms ≤t
t<
(b)
synchronization
time
muted LC1
muting sensor 1
muting sensor 2
muting lamp
safety relay K1/K2
start button
unmuted LC2
: on : flashing : fast flashing (3Hz)
error code 12
t=3 S override
t< 12S
a= maximum muting time
b= m axim um synchronising time
0 1 2 3 4 5 6 7 8 9
2LC 1 Autostart,
muting 2 sensors
3LC 1 manual start,
muting 2 sensors
4LC 1 Autostart,
muting 4 sensors
Switch 1
5LC 1 manual start,
muting 4 sensors
s01:a
s3:b
s02:a
s3:b
s03:a
s3
:b
min.
1
:a
s6:b
5 min.:a
s
0
3
:
b
5 min.1:a
s
09
:b
min.03:a
3 min.:b 1 h:a
min.3:b
h8
:a
min.3:b
no muting time
monitoring
Sw it ch 10
Protective operation with muting

7
Schematic 3: Typical 2 light curtains with 2-sensor muting and Auto Restart LC1
Schematic 4: Typical 2 light curtains with 2-sensor muting and Manual Start/Restart
Auxiliary Circuit
(Alarm Or Indication)
Power
Maintained
Push Button
A1 3113 23
A2 M1 M2 48 58 S41 S42
S43 S44
S12 S14 S21 S22 S23
X44
S24 S31 S32 S33 S34
3214 24
M
K3
K4
L1 L2 L3
Contact
Protection
e.g. Thermal
Cut Out
Fuses
K3 K4
MSR22LM
Manual Start
2-Sensor Mute
30sec Mute
24V DC
Safety Contactors
or Safety Control Relays
24V Ground
SENDERSENDER
OSSD 1
OSSD 2
RECEIVERRECEIVER
Light Curtain
LC2 - not muted
Light Curtain
LC1 - muted Muting
Lamp
Start/Restart
Required
Start/
Restart
Momentary
Pushbutton
Muting
Sensors
SENDER
OSSD 1
OSSD 2
RECEIVER
K3(Aux)
K4(Aux)
Machine
Start
Momentary
Push Button
Machine
Stop
Momentary
Push Button
K1
K2
33
2
2
MS1
MS2
•
Auxiliary Circuit
(Alarm Or Indication)
Power
Maintained
Push Button
A1 3113 23
A2 M1 M2 48 58 S41 S42
S43 S44
S12 S14 S21 S22 S23
X44
S24 S31 S32 S33 S34
3214 24
K3 K4
MSR22LM
Auto Restart LC1
2 Sensor Mute
30sec Mute
24V DC
Safety Contactors
or Safety Control Relays
24V Ground
SENDERSENDER
OSSD 1
OSSD 2
RECEIVERRECEIVER
Light Curtain
LC2 - not muted
Light Curtain
LC1 - muted Muting
Lamp
Start/Restart
Required
Start/
Restart
Momentary
Pushbutton
Muting
Sensors
OSSD 1
OSSD 2
K3(Aux)
K4(Aux)
Machine
Start
Momentary
Push Button
Machine
Stop
Momentary
Push Button
K1
K2
22
2
2
MS1
MS2
M
K3
K4
L1 L2 L3
Contact
Protection
e.g. Thermal
Cut Out
Fuses

8
Muting Mode, 4-Sensor
Internal Switch Settings
Sequence:MS1⇓MS2⇓LC1⇓MS3⇓MS4⇓MS1⇑MS2⇑LC1⇑MS3⇑MS4⇑
⇓= signal interrupted, ⇑= signal present
Muting
Muting is the temporary, automatic disabling of the protective function of a
light curtain. This function is used to transport material through a light curtain
without stopping the machine. The differentiation between material and
persons is done by muting sensors. The muting sensors create a certain
switching sequence together with the light curtain when material passes
through the light curtain.
The muting cycle is indicated by a muting lamp that is controlled and
monitored by the MSR22LM. The maximum muting time can be set in 10 steps
between 10s and infinite. The Muting lamp current range is 25 Ma to 100 Ma.
If the light curtain is still interrupted after the max. permitted muting time e.g.
by blocked material the contacts K1, K2 open and the muting lamp as well as
the LED run 1 show failure code 4.
4-Sensor Muting
Light curtain LC1 and the muting sensors must be arranged according to
the Setup diagram. Setup must take into account material size, shape and
speed.
Schematics 5 and 6 show typical applications for one light curtains with 4-
sensor muting. For both applications, the Start/Restart button must be
pressed and released after power is applied.
Schematic 5 shows a typical application for automatic restart of LC1. If
LC1 is interrupted during a non-muting sequence, the MSR22LM de-
energizes K1 and K2. When LC1 is cleared, K1 and K2 are automatically
energized.
Schematic 6 shows a typical application for manual start/restart. If LC1 is
interrupted, the Start/Restart must be pressed and released to energize
K1 and K2.
Timing Diagram
ATTENTION: The muting sensors must be arranged so a
person cannot activate the muting sensors in the same switching sequence
as the material and enter the area when the hazardous condition exists. To
help accomplish this, the user can select either 2-sensor or 4-sensor
muting. Additional guarding may also be necessary.
1. After powerup, the Start/Restart lamp turns on. Press and release the
Start/Restart button. Upon release, K1 and K2 energize if the light curtain
and the muting sensors are clear.
2. The muting sequence starts by blocking sensor 1, then sensor 2, after
which the muting lamp turns on.
3. The material must break LC1 within 3.05s.
4. The material must then block sensors 3 and 4 before clearing sensors 1
and 2.
5. After clearing sensor 3, the muting lamp turns off.
6. The material clears sensor 4 to complete the muting cycle.
LC
Machine Material Conveyor
MS3MS4 MS2 MS1
Muting lamp
muted LC
Material can only move in one direction with 4-sensor muting.
Setup
If the monitored area is blocked by transported material and the outputs
K1, K2 are switched off, this is indicated by fast flashing (approx. 3 Hz) of the
muting lamp. The operator can activate the outputs K1, K2 by pressing the
start button for more than 3 s for a maximum time of 12 s until the muting
sensor are again inactive or the start button is released again.
Override
muted LC1
muting sensor 1
muting sensor 2
muting lamp
safety relay K1/K2
start button
unmuted LC2
: on : flashing : fast flashing(3Hz)
error code 12
t=3 S override
t< 12S
LC, muted
Muting sensor 1
Muting sensor 3
Muting sensor 2
Muting sensor 4
Muting lamp
Muting lamp monitoring
t< 50ms
t>30ms
t<5 0ms
t< 30ms
t<3 0ms
t < muting time (a)
30ms ≤t
t < synchronization
time (b)
30ms ≤t
t < synchronization
tme (b)
a= maximum muting time
b= m axim um synchronising time
0 1 2 3 4 5 6 7 8 9
2LC 1 Autostart,
muting 2 sensors
3LC 1 manual start,
muting 2 sensors
4LC 1 Autostart,
muting 4 sensors
Switch 1
5LC 1 manual start,
muting 4 sensors
s01:a
s3:b
s02:a
s3:b
s03:a
s3
:b
min.
1
:a
s6:b
5 min.:a
s
0
3
:
b
5 min.1:a
s
09
:b
min.03:a
3 min.:b 1 h:a
min.3:b
h8
:a
min.3:b
no muting time
monitoring
Sw it ch 10
Protective operation with muting

9
Schematic 5: Typical 1 light curtain with 4-sensor muting and Auto Restart LC1
Schematic 6: Typical 1 light curtain with 4-sensor muting and Manual Start/Restart
Auxiliary Circuit
(Alarm Or Indication)
Power
Maintained
Push Button
A1 3113 23
A2 M1 M2 48 58 S41 S42
S43 S44
S12 S14 S21 S22 S23
X44
S24 S31 S32 S33 S34
3214 24
M
K3
K4
L1 L2 L3
Contact
Protection
e.g. Thermal
Cut Out
Fuses
MSR22LM
Auto Restart
4-Sensor Mute
1hr Mute
24V DC
24V Ground
SENDER
OSSD 1
OSSD 2
RECEIVER
Light Curtain
LC1
Muting
Indicator
Start/Restart
Required
Start/
Restart
Momentary
Pushbutton
Muting
Sensors K3(Aux)
K4(Aux)
Machine
Start
Momentary
Push Button
Machine
Stop
Momentary
Push Button
K1
K2
44
5
5
K3 K4 Safety Contactors
or Safety Control Relays
MS3
MS4
MS1
MS2
Auxiliary Circuit
(Alarm Or Indication)
Power
Maintained
Push Button
A1 3113 23
A2 M1 M2 48 58 S41 S42
S43 S44
S12 S14 S21 S22 S23
X44
S24 S31 S32 S33 S34
3214 24
M
K3
K4
L1 L2 L3
Contact
Protection
e.g. Thermal
Cut Out
Fuses
MSR22LM
Manual Start
4-Sensor Mute
1min Mute
24V DC
24V Ground
SENDER
OSSD 1
OSSD 2
RECEIVER
Light Curtain
LC1
Muting
Lamp
Start/
Restart
Momentary
Pushbutton
Muting
Sensors K3(Aux)
K4(Aux)
Machine
Start
Momentary
Push Button
Machine
Stop
Momentary
Push Button
K1
K2
55
3
3
K3 K4 Safety Contactors
or Safety Control Relays
MS3
MS4
MS1
MS2
Start/Restart
Required

10
To enable the machine at start-up on PSDI operation, one of the following
two different start sequences can be chosen.
1. Press and release the Start/Restart button and then break LC1 the
required number of times, or
2. Break LC1 the required number of times and then press and release
the Start/Restart button.
Typical Application Start Sequence
Presence Sensing Device Initiation (PSDI ) Mode
Internal Switch Settings
Switch 10: Number of steps
Stepping operation 0 1 2 3 4 - 9
6Stepping operation, contact type 1,
Start-sequence: stepping and start
Stepping operation, contact type 2,
Start-sequence: stepping and start
Stepping operation, contact type 1,
Start-sequence: start and stepping
Stepping operation, contact type 2,
Start-sequence: start and stepping
selec-
71
step
2
steps
3
steps
not
by key
all-
8switch
owed
(fault
5)
9
Switch 1
Start Before Break Timing Diagram
Break Before Start Timing Diagram
table
PSDI operation (also known as Stepping) enables automatic restart of a
machine after a certain number of accesses into the protected area through
a light curtain. This operation requires a two step process: 1) a start
sequence followed by 2) a normal sequence.
Schematics 7 and 8 show typical applications for PSDI operation. In both
applications, only LC1 performs the PSDI operation; light curtains LC2 and
LC3 operate in Guard Only mode. If either LC2 or LC3 are broken, K1 and
K2 will turn off. After the light curtain(s) is cleared, the Start/Restart button
must be pressed and released to turn K1 and K2 back on. The MSR22LM
returns to the normal sequence.
Schematic 8 shows a typical application with a 3-way maintanined key
switch, which can be used to set and change the number of breaks without
cycling power. The switch must only be turned when K1 and K2 are de-
energized. A new number of breaks is signaled by the PSDI lamp being on.
Press the Start/Restart button to restart the unit
Power supply
(A1/A2)
Start button (S43/S44)
LC 1 (S12/S14)
LC 2 (S22/S24) and/or
LC 3 (S32/S34)
K1, K2
(13-14, 23-24, 33-34)
wait for access (48)
wait for start (58)
:on
: flashing 1Hz
:dark : flashing 3Hz
Power supply
(A1/A2)
Start button (S43/S44)
LC 1 (S12/S14)
LC 2 (S22/S24) and/or
LC 3 (S32/S34)
K1, K2
(13-14, 23-24, 33-34)
wait for access (48)
wait for start (58)
:on
: flashing 1Hz
: dark : flashing 3Hz

11
Presence Sensing Device Initiation (PSDI ) Mode
Break Before Start
Short Duration Machine Cycle Contact
Long Duration Machine Cycle Contact
Short Duration Machine Cycle Contact
Normal sequence
A correct starting sequence is necessary to run the normal operating
sequence. In the normal operating sequence the machine movement is
signaled to the MSR22LM by opening and closing of the machine
contact. The output contacts of the MSR22LM are opened when the
machine contact opens. After that the operator must interrupt the LC
for the required number of times to restart the machine operation.
All necessary breaks must be completed within 30s. The demand to
access is indicated on fast flashing (3 Hz) output 48. When the
required number of interruptions on the LC is completed the lamp
goes off and the contacts K1 and K2 close.
A normally closed machine contact must be connected to the terminals
S41 and S42 of the MSR22LM. The opening and closing of this contact
depends on the machine setup and must be either short or long duration.
Internal selector Switch 1 must be set to correspond to the cycle duration
(see Internal Switch Settings on page 10).
In this mode, interruptions of LC1 must only be done when the machine
contact has been opened and closed again. An exception is when an
interruption is started while the contact is open and still is going on while
the contact closes (the hashed area in the timing diagram below).
In this mode, interruptions are accepted while the machine contact is
open. The machine is only enabled when the interruptions are completed
and the machine cycle contact is closed again.
Schematic 8 shows a typical application where the number of breaks is
changed by a key-operated switch. To enable the change, K1 and K2 must
be de-energized. This can be accomplished by breaking one of the light
curtain inputs, which maintains the machine cycle contact in the closed
position. After changing the key switch setting, the start sequence must be
performed followed by the normal sequence. The timing diagram shows an
example of a change to single break for Break Before Start and Short
Duration Cycle Contact setting.
Changing Breaks with Key Switch
Single break example
Key Switch
(S32/S34)
Machine Contact
(S41/S42)
LC1 (S12/S14)
LC2 (S22/S24)
K1 (13/14) and
K2 (23/24)
PSDI Mode (48)
Start/Restart
Required (58)
Start/Restart
button (S43/S44)
onflashing
dark
Key Switch
Change
Start
Sequence
Normal
Sequence
LC1 (S12/S14)
Machinecontact
(S41/S42)
K1,K2
(13-14, 23-24, 33-34)
wait for access(48)
wait for start (58)
:on: dark : flashing3Hz
LC 1 (S12/S14)
Machine contact
(S41/S42)
K1, K2
(13-14, 23-24, 33-34)
wait for access (48)
wait for start (58)
:o n:dark : flashing 3Hz
Forbidden access into the light curtain
Start button (S43/S44)
LC 1 (S12/S14),LC 2
(S22/S24) o. LC 3 (S32/S34)
Machine contact
(S41/S42)
K1, K2
(13-14, 23-24, 33-34)
wait for access (48)
wait for start (58)
:on
: flashing 1Hz : error code
:off
On forbidden access the lamp (on terminal 58) shows symmetric flashing.
The lamp on terminal 48 flashes with code 1. After finishing the access the
lamp on terminal 58 returns to permanent light and signalises, that the
machine can be started with the start button.

12
Schematic 7: Typical PSDI Mode, LC1
Schematic 8: Typical PSDI Mode, LC1 - with Key Switch Setting
Auxiliary Circuit
(Alarm Or Indication)
Power
Maintained
Push Button
A1 3113 23
A2 M1 M2 48 58 S41 S42 S43 S44
S12 S14 S21 S22 S23
X44
S24 S31 S32 S33 S34
3214 24
Fuse
K3 K4
MSR22LM
PSDI
Break/Start, Short
Key switch set
24V DC
24V Ground
Start/Restart
Required
Start/
Restart
Momentary
Push Button
SENDER
SENDER
OSSD 1
OSSD 2
RECEIVER
RECEIVER
K1
K2
66
0
0
Light Curtain 2
Guard Only
OSSD 1
OSSD 2
Light Curtain 1
PSDI
PSDI
Machine
Cycle M
K3
K4
L1 L2 L3
Contact
Protection
e.g. Thermal
Cut Out
Fuses
Safety Contactors
or Safety Control
Relays
Auxiliary Circuit
(Alarm Or Indication)
Power
Maintained
Push Button
A1 3113 23
A2 M1 M2 48 58 S41 S42 S43 S44
S12 S14 S21 S22 S23
X44
S24 S31 S32 S33 S34
3214 24
Fuse
K3 K4
MSR22LM
PSDI
Break/Start, Short
Doublebreak
24V DC
24V Ground
OSSD 1
OSSD 2
Light Curtain 3
Guard Only
Start/Restart
Required
Start/
Restart
Momentary
Push Button
OSSD 1
OSSD 2
K1
K2
6
6
2
2
Light Curtain 2
Guard Only
SENDER SENDER SENDER
OSSD 1
OSSD 2
RECEIVER RECEIVER RECEIVER
Light Curtain 1
PSDI
PSDI
Machine
Cycle M
K3
K4
L1 L2 L3
Contact
Protection
e.g. Thermal
Cut Out
Fuses
Safety Contactors
or Safety Control Relays
Key
Switch
No. of
Breaks
1
2
3

13

14 Drg No: 23992 / Issue No: 3
EO: 23992
R