MSI-TRMB
Safety relays
EN 2019/03/19 - 50128273
We reserve the right to make
technical changes
SAFE IMPLEMENTATION AND OPERATION
Original operating instructions
© 2019
Leuze electronic GmbH + Co. KG
In der Braike 1
D-73277 Owen / Germany
Phone: +49 7021 573-0
Fax: +49 7021 573-199
http://www.leuze.com
info@leuze.de
Leuze electronic MSI-TRMB 2
1 About this document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Used symbols and signal words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Intended use and foreseeable misuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.2 Foreseeable misuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Competent persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Responsibility for safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Exemption of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Device connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Display elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Error display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Operating mode 1 AOPD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Operating mode 2 AOPD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Operating mode ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Operating mode SG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5 Testing with operating mode 1 AOPD and 2 AOPDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6 Testing with operating mode ES and SG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.7 Start/restart interlock and contactor monitoring (EDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.8 Error state FAIL SAFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.8.1 Software reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Access guarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Arrangement of the protective device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1.1 Calculating the safety distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1.2 Multi-axis arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.3 Minimum distance to reflective surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.4 Checklist – mounting the protective sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1 Terminal assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8 Starting up the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.1 Switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 Start/restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2.1 Unlocking start/restart interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.1 Before the initial start-up and following modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.1.1 Checklist – initial start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.2 To be performed periodically by a competent person . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9.3 To be performed daily by the operating personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9.3.1 Check list – daily or at change of shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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10 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
11.1 What to do in case of failure? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
12 Disposing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
13 Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
14 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
14.1 General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
14.2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
15 Order guide and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
16 Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
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1 About this document
1.1 Used symbols and signal words
Table 1.1: Warning symbols and signal words
Symbol indicating dangers to persons
NOTE Signal word for property damage
Indicates dangers that may result in property damage if the measures for danger
avoidance are not followed.
CAUTION Signal word for minor injuries
Indicates dangers that may result in minor injury if the measures for danger avoidance are not followed.
WARNING Signal word for serious injury
Indicates dangers that may result in severe or fatal injury if the measures for danger
avoidance are not followed.
DANGER Signal word for life-threatening danger
Indicates dangers with which serious or fatal injury is imminent if the measures for
danger avoidance are not followed.
About this document
Table 1.2: Other symbols
Symbol for tips
Text passages with this symbol provide you with further information.
ª
Table 1.3: Terms and abbreviations
AOPD Active Optoelectronic Protective Device
EDM External Device Monitoring
OSSD Output Signal Switching Device
SSD Secondary Switching Device
RES Start/REStart interlock
PFH Probability of a dangerous failure per hour
MTTF Mean time to dangerous failure
Symbol for action steps
Text passages with this symbol instruct you to perform actions.
Active Optoelectronic Protective Device
Probability of dangerous Failure per Hour
Mean Time To Failure
PL Performance Level
ES Emergency Stop
SG Safety Gate
Optical short-circuit
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Short-circuit of one or more series-connected photoelectric sensors caused by optical signals
1.2 Checklists
The checklists (see chapter 9 "Testing") serve as a reference for the machine manufacturer or supplier.
They replace neither testing of the complete machine or system prior to the initial start-up nor their periodic
testing by a competent person. The checklists contain minimum testing requirements. Depending on the
application, other tests may be necessary.
About this document
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2 Safety
Before using the safety relay, a risk assessment must be performed according to valid standards (e.g.
ISO 14121, ISO 12100-1, ISO 13849-1, IEC 61508, IEC 62061). The result of the risk assessment determines the required safety level of the safety relay (see table 14.1). For mounting, operating and testing,
this document as well as all applicable national and international standards, regulations, rules and directives must be observed. Relevant and supplied documents must be observed and handed to the affected
personnel.
ª Before working with the safety relay, completely read and understand the documents applicable to your
task.
In particular, the following national and international legal regulations apply for the start-up, technical
inspections and work with safety relays:
• Machinery directive 2006/42/EC
• Low voltage directive 2014/35/EU
• Electromagnetic compatibility 2014/30/EU
• Use of work equipment directive 2009/104/EC
• OSHA 1910 Subpart 0
• Safety regulations
• Accident-prevention regulations and safety rules
• Ordinance on Industrial Safety and Health and employment protection act
• Device Safety Act
Safety
For safety-related information you may also contact local authorities (e.g., industrial inspector-
ate, employer's liability insurance association, labor inspectorate, occupational safety and health
authority).
2.1 Intended use and foreseeable misuse
DANGER
Electrically live systems pose a risk of electric shock!
ª During all conversions, maintenance work and inspections, make certain that the voltage supply is
interrupted and protected against being restarted again.
ª Only have work on the electrical system and electronics performed by a competent person.
ª Make certain that the safety relay is installed in a switch cabinet or housing (IP54 or higher).
2.1.1 Intended use
WARNING
A running machine may result in serious injury!
ª Make certain that the safety relay is correctly connected and that the protective function of the protec-
tive device is ensured.
ª Make certain that, during all conversions, maintenance work and inspections, the system is securely
shut down and protected against being restarted.
Only if the safety relay is correctly connected and correctly started up is the protective function of the
protective device ensured. To prevent misuse and resulting dangers, the following must be observed:
• These operating instructions are included in the documentation of the system on which the protective
device is mounted and are available to the operating personnel at all times.
• The safety relay is used as follows:
• as a safety monitoring device in combination with one or more protective sensors for safeguarding
danger zones or points of operation on machines and systems.
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Safety
• as a safety sequential device for 2-channel E-Stop and safety door monitoring.
• The safety relay must only be used after it has been selected in accordance with the respectively
applicable instructions and relevant standards, rules and regulations regarding labor protection and
safety at work, and after it has been installed, connected, checked and commissioned by a competent person.
• The safety relay must only be connected and commissioned in accordance with its specifications
(technical data, environmental conditions, etc.).
• The “Reset” acknowledgment button for unlocking the start/restart interlock must be located outside
of the danger zone.
• The entire danger zone must be visible from the installation site of the acknowledgment button.
• The safety relay must be selected so that its safety-related capability meets or exceeds the required
Performance Level PL ascertained in the risk assessment (see table 14.1).
• The machine or system control must be electrically influenceable so that a switch command sent by
the safety relay results in the immediate shutdown of the dangerous movement.
• The construction of the safety relay must not be altered. When manipulating the safety relay, the protective function is no longer guaranteed. Manipulating the safety relay also voids all warranty claims
against the manufacturer of the safety relay.
• The safety relay must be tested by a qualified person at regular intervals, i.e. at least every 6 months
or during regular maintenance of the machine.
• The safety relay must be exchanged after a maximum of 20 years. Repairs or the exchange of wear
parts do not extend the mission time.
2.1.2 Foreseeable misuse
Any use other than that defined under the “Approved purpose” or which goes beyond that use is considered improper use.
Alone, the safety relay is not a complete protective device. It is not suitable for use in the following cases:
• in explosive or easily flammable atmospheres.
• on machines or systems with long stopping times.
2.2 Competent persons
Prerequisites for competent persons:
• They have a suitable technical education.
• They know the rules and regulations for labor protection, safety at work and safety technology and
can assess the safety of the machine.
• They know the instructions for the safety relay and the machine.
• They have been instructed by the responsible person on the mounting and operation of the machine
and of the safety relay.
2.3 Responsibility for safety
Manufacturer and operating company must ensure that the machine and implemented safety relay function properly and that all affected persons are adequately informed and trained.
The type and content of all imparted information must not lead to unsafe actions by users.
The manufacturer of the machine is responsible for:
• Safe machine construction.
• Safe implementation of the safety relay.
• Imparting all relevant information to the operating company.
• Adhering to all regulations and directives for the safe starting-up of the machine.
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The operator of the machine is responsible for:
• Instructing the operating personnel.
• Maintaining the safe operation of the machine.
• Adhering to all regulations and directives for labor protection and safety at work.
• Regular testing by competent persons.
2.4 Exemption of liability
Leuze electronic GmbH + Co. KG is not liable in the following cases:
• Safety relay is not used as intended.
• Safety notices are not adhered to.
• Reasonably foreseeable misuse is not taken into account.
• Mounting and electrical connection are not properly performed.
• Proper function is not tested (see chapter 9 "Testing").
• Changes (e.g., constructional) are made to the safety relay.
Safety
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3 Device description
The MSI-TRMB safety relays can be used as follows:
• Safety monitoring devices for electro-sensitive protective equipment (ESPE) on machines which
pose a risk of injury (according to IEC 61496-1),
• Safety sequential device for 2-channel E-Stop monitoring, safety sequential device for 2-channel
safety door monitoring.
As part of the electrical equipment, they enable machines or systems to achieve a safe state before
persons can be endangered.
The safety relay is intended for DIN rail mounting and is wired via 16 terminals. It must be installed in a
housing or switch cabinet (IP54 or higher).
The complete safety system consists of a safety relay and safety sensors connected to it.
Device description
+ 24V
b
-A1
Transmitter
0V
PE
active
-A2
1
+24V
0V
3
44
1 A1
Receiver
dc
0V + 24V
3
-A3
a Reset / device reset (if software reset using start button as described under 4.8 is not desired)
b Active
c Transmitter
d Receiver
e Start application see chapter 4.1 "Operating mode 1 AOPD", (here: operation with start/restart inter-
lock)
f Operating mode: safety monitoring device with one or more protective sensors connected in series
g EDM (contactor monitoring / external device monitoring circuit)
h OSSD safety switching output (cross-circuit protection of both outputs by means of polarity reversal
to i)
i OSSD safety switching output (cross-circuit protection of both outputs by means of polarity reversal
to h)
j “Error”
Figure 3.1: Structure of the complete safety system
a
Reset
S11 S22 S12
MSI-TRMB
0V
6
Var . A
+24V
-K2-K1
f e
Betriebsart
Start
Var . B
-K1
-K2
-K1
-K2
S36
S35
StartApplikation:
Überwachter
Start
St at e
S31 14 24
j
-K1
L- L+
1
2
g i
13 23S21
Er ro r
i
A1
A2
L+ L-
-K2
+24V
1
2
h
h
A1
A2
0V
PE
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3.1 Device connection
S11 S12 S21 S22
S31 S32 S33 S34
A1 S35 S36 A2
13 14 23 24
OUT1 IN1 PWR
OUT2 IN2 Fault
13
14 23
24
MSI-TRMB
LED 1, 3, 5
LED 2, 4, 6
S11 S12 S21 S22
S31 S32 S33 S34
A1 S35 S36 A2
13 14 23 24
OUT1 IN1 PWR
OUT2 IN2 Fault
13
14 23
24
MSI-TRMB
Figure 3.2: MSI-TRMB
3.2 Display elements
The display elements of the safety relay simplify start-up and fault analysis.
Device description
1“OUT1”
2“OUT2”
3“IN1”
4“IN2”
5“PWR”
6“Fault”
Figure 3.3: Display elements of the MSI-TRMB
Table 3.1: Meaning of the LEDs
LED Color Description
OUT1 Green Channel 1 relay actuated
OUT2 Green Channel 2 relay actuated
OUT1 and OUT2 Green, flashing Optical short-circuit in the case of ESPE applica-
tions
IN1 Yellow Input 1 active
IN2 Yellow Input 2 active
IN1 and IN2 Yellow flashing Single-channel switch-off – waiting for second
channel (in the case of E-Stop/safety door application)
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LED Color Description
PWR Green Power on
PWR Green, flashing Supply voltage not correct (see chapter 14.1 "Gen-
Fault Red Internal or external fault (see chapter 3.3 "Error
3.3 Error display
Table 3.2: Error display via LEDs
LED indicator Errors and possible causes Remedial measures
Fault IN1, IN2 OUT1, OUT2
Device description
eral specifications")
display")
On Flashing Off Start button / bridge is (with
automatic, non-monitored
start) not connected to S21
Change of start condition
during operation
On Off Flashing
alternately
Output S11/S21 short-circuit
to GND
Output S11/S21 short-circuit
to VCC
Incorrect input signals, incorrect operating mode
Reaction time of ESPE is
longer than 8.5 ms
Cross-circuit between S11
and S21 or S12 and S22
Short-circuit of triggering elements in the case of ESPE
applications
On Off Flashing Error during relay test –
internal relay defective /
fused together
Disconnect device from
power supply, check for wiring faults, replace device if
defective
Disconnect device from
power supply, check wiring,
replace device if defective or
check connected ESPE
Disconnect device from
power supply, check connections at relay contacts,
check max. output capability
(see chapter 14.1 "General
specifications"), replace
device if defective
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Device description
LED indicator Errors and possible causes Remedial measures
Fault IN1, IN2 OUT1, OUT2
On Flashing
alternately
On Flashing
alternately
Off With E-Stop/protective door
application: When switching
on power supply, signals at
S12 and S22 have different
values
Problems with detection of
operating mode:
Signal at S32 cannot be
clearly allocated
Problems with detection of
operating mode:
Bridge / signal at S12 cannot
be clearly allocated
Application - connection of
ESPE: Bridge S21-S12 was
removed during operation
Wiring at S32 was changed
during operation or S32 has
short-circuited to VCC/GND
during operation
Flashing
alternately
Optical short-circuit existed
during teach-in and was
removed later
Disconnect device from
power supply, check for wiring faults, replace device if
defective or check connected ESPE
Disconnect device from
power supply, check wiring
and connected ESPE
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4 Functions
AOPD
S11
S12
S21 S22 S32
AOPD AOPD
S11 S12 S21 S22 S32
ES
S11
S12 S21 S22
S32
ES
After the safety relay is switched on, the device performs a self test. During this test, the operating mode
in which the safety relay is to function is determined on the basis of the wiring. The basic wiring configurations of the individual operating modes are given below.
4.1 Operating mode 1 AOPD
Safety monitoring device with one or more protective sensors connected in series used for safeguarding
danger zones or points of operation on machines and systems.
AOPD = one or more protective sensors connected in series
Figure 4.1: Basic wiring for operating mode 1 AOPD (one protective sensor)
If protective sensors are linked together in the way shown in the connection examples (see
figure 7.3 and see figure 7.4), the total delay time (0.5 ms to 8.5 ms) should be noted.
Functions
4.2 Operating mode 2 AOPD
Safety monitoring device with two protective sensors or two series connections consisting of multiple
protective sensors used for safeguarding danger zones or points of operation on machines and systems.
AOPD = one or more protective sensors connected in series
Figure 4.2: Basic wiring for operating mode 2 AOPDs (two protective sensors)
If protective sensors are linked together in the way shown in the connection examples (see
figure 7.7 and see figure 7.8), the total delay time (0.5 ms to 8.5 ms) should be noted.
4.3 Operating mode ES
Safety sequential device for 2-channel E-Stop monitoring with NC contacts.
ES = mechanical E-Stop switch (2-channel)
Figure 4.3: Basic wiring of operating mode ES (E-Stop)
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Automatic start is not approved for E-Stop applications.
4.4 Operating mode SG
SG
S11
S12 S21 S22
S32
SG
a
1 ms
200 ms
Safety sequential device for 2-channel safety door monitoring.
SG = mechanical safety door switch (2-channel)
Figure 4.4: Basic wiring for operating mode SG (safety door)
The safety door monitoring switches must be closed so that the safety switching outputs (OSSD)
can close.
4.5 Testing with operating mode 1 AOPD and 2 AOPDs
The protective sensors (AOPDs) are monitored for
• Short-circuit with operating voltage (Vcc or GND)
• Electrical cross-circuit
• Optical cross-circuit or short-circuit
For this purpose, control outputs S11 and (after a delay) S21 are clocked.
Functions
The total delay time for a linked series of photoelectric sensors must be in the range from 0.5 ms
to 6.5 ms.
4.6 Testing with operating mode ES and SG
The E-Stop and safety door switch is monitored for
• Short-circuit with operating voltage (Vcc or GND)
• Electrical cross-circuit
For this purpose, control outputs S11 and (after a delay) S21 are clocked as shown in the diagram below:
a Test signal of MSI-TRMB at S11 and S21
Figure 4.5: Diagram showing clocking of control outputs S11 and S21
4.7 Start/restart interlock and contactor monitoring (EDM)
The start/restart interlock prevents automatic start-up of the system (e.g. if the protective field is again clear
or if an interruption in the voltage supply is restored). The operating personnel must make certain that no
people are present in the danger zone before the system is manually re-enabled.
The restart interlock is configured via the wiring.
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Figure 4.6: Start/restart interlock and contactor monitoring (EDM)
Start
S36 S35
K
ext
Start
S33 S34
K
ext
Figure 4.7: Automatic start with EDM
Functions
A feedback contact of an external contact extension (K
Changing between the two start configurations is not allowed during operation. If a change is detected, the
device enters the error state and indicates this via the LEDs (see chapter 3.3 "Error display"). The specific
wiring of the external relays is shown in the application examples (see figure 7.1 – see figure 7.11). With
a monitored start, the device reacts to the falling edge of the start button; with a non-monitored start, it
reacts to the rising edge or the static signal.
NOTICE
Operation of the device in the E-Stop application with automatic start (without restart interlock) is not
allowed.
NOTICE
With monitored start, K
4.8 Error state FAIL SAFE
If the device is in an error state (FAIL SAFE), this is indicated by the LEDs (see chapter 3.3 "Error display").
In the error state, the OSSD safety switching outputs (relay outputs) and control outputs S11 and S21 are
switched off. The device no longer reacts to input actuation, e.g. pressing of the start button.
The error state can be reset by means of a software reset (see chapter 4.8.1 "Software reset") or by briefly
switching off the voltage supply at A1, e.g. using a reset button connected in series to the supply voltage
at A1.
4.8.1 Software reset
) can be connected in series with the start button.
ext
must be connected between the start button and S35.
ext.
If the safety relay indicates a fault, it can be reset as follows:
• With monitored start: press the start button for at least 4 s.
• Between S35 and S36: press a button connected for the reset, for at least 4 s.
Leuze electronic MSI-TRMB 16
5 Applications
5.1 Access guarding
Safety relays are used together with single- or multiple light beam safety devices, e.g. as access guarding
for danger zones. Because protective sensors only detect persons upon entry into the danger zone, and
not whether a person is present in the danger zone, the safety relay only triggers the switch command
upon entry of a person into a danger zone. Access guarding may therefore only be operated with activated
start/restart interlock or additional safety measures must be taken.
Applications
Figure 5.1: Intervention control on packaging machinery
Leuze electronic MSI-TRMB 17
Applications
Figure 5.2: Access guarding / intervention control on sawing machines
Figure 5.3: Foot-space protection on side-tracking shelves
Leuze electronic MSI-TRMB 18
6 Mounting
SKTC+=
WARNING
Improper mounting may result in serious injury!
The protective function of the safety relay is only ensured if appropriately and professionally mounted for
the respective, intended area of application.
ª Only allow competent persons to install the safety relay.
ª Observe the relevant standards, regulations and these instructions.
The safety relay is intended for mounting on a DIN rail in the switch cabinet.
Prerequisites for mounting:
• Switch cabinet with appropriate degree of protection (at least IP54).
• Sufficient space on the DIN rail.
• Arrangement of the protective device acc. to ISO 13855 see chapter 6.1 "Arrangement of the protective device".
ª Snap the safety relay onto the DIN rail.
The safety relay can be connected to the protective sensor.
Mounting
6.1 Arrangement of the protective device
Optical protective devices can only perform their protective function if they are mounted with adequate
safety distance. When mounting, all delay times must be taken into account, e.g. the response times of
the protective sensor and control elements as well as the stopping time of the machine.
The following standards specify calculation formulas:
• ISO 13855, "The positioning of protective devices in respect of approach speeds of parts of the
human body": mounting situation and safety distances.
• IEC 61496-2, "Active optoelectronic protective devices": distance of the reflecting surfaces/deflecting
mirrors.
Table 6.1: Beam heights and distances
Number of beams/beam distance [mm] Beam heights in accordance with ISO 13855 [mm]
2 / 500 400, 900
3 / 400 300, 700, 1100
4 / 300 300, 600, 900, 1200
6.1.1 Calculating the safety distance
General formula for calculating the safety distance S of an Optoelectronic Protective Device acc. to
ISO 13855:
S [mm] = Safety distance
K [mm/s] = 1600 mm/s (approach speed for access guarding)
T [s] = Total time of the delay
C [mm] = 850 mm (default value for arm length)
ª Calculate safety distance S for access guarding using the formula acc. to ISO 13855:
Leuze electronic MSI-TRMB 19
S [mm] = Safety distance
S 1600 mm tatit
m
++850 mm+=
a
a
a
b
b
b
a
b
4°
4°
c
[s] = Response time of the protective device
t
a
t
[s] = Response time of the safety relay
i
t
[s] = Machine stopping time
m
If longer stopping times are determined during regular inspections, an appropriate additional time
must be added to t
6.1.2 Multi-axis arrangement
With multi-axis installation, the light beams must run parallel to the reference plane (e.g. floor) and must
be aligned mutually parallel.
When mounting multiple protective sensors, no transmitter may be directed any receiver within the series
connection other than that which is intended. Note that the operating ranges of photoelectric sensors may
be larger than the specified maximum ranges. Correct mounting of the protective sensors must be checked
by means of tests and secured against misalignment.
Mounting
.
m
a Transmitter
b Receiver
Figure 6.1: Multi-axis arrangement
6.1.3 Minimum distance to reflective surfaces
WARNING
Failure to maintain minimum distances to reflective surfaces may result in serious injury!
Reflective surfaces can indirectly deflect the transmitter beams to the receiver. In this case, interruption
of the protective field is not detected.
ª Make certain that all reflective surfaces are the necessary minimum distance away from the protective
field.
a Required minimum distance to reflective surfaces [mm]
b Protective field width [m]
c Reflective surface
Figure 6.2: Minimum distance to reflective surfaces depending on protective field width
Leuze electronic MSI-TRMB 20
Mounting
a
900
200
800
300
400
600
500
700
3
510
b
131
a
500
3500
1000
1500
2500
2000
3000
3
20 40
60
70
b
131
10
30
50
a Required minimum distance to reflective surfaces [mm]
b Protective field width [m]
Figure 6.3: Minimum distance to reflective surfaces as a function of the protective field width up to 10 m
a Required minimum distance to reflective surfaces [mm]
b Protective field width [m]
Figure 6.4: Minimum distance to reflective surfaces as a function of the protective field width up to 70 m
ª Calculate the minimum distance to reflective surfaces depending on the installation situation and
according to the following formula:
Table 6.2: Calculating the minimum distance
Distance (b) transmitter-
Calculation of the minimum distance (a) to reflective surfaces
receiver
3 m a [mm] = 131
b
b > 3 m a [mm] = tan(2.5°)
1000 b [m] = 43.66 b [m]
Deflecting mirrors
When using deflecting mirrors, the following must be observed:
• Range loss per deflecting mirror of approx. 15 %.
• Deflecting mirrors must not be soiled.
• Environmental conditions (vapors or dust-laden air considerably limit the range).
• Arrange the deflecting mirror so that the optical axis is aligned with the center of the mirror see
figure 6.5.
Leuze electronic MSI-TRMB 21
Figure 6.5: Arrangement of the deflecting mirrors
6.1.4 Checklist – mounting the protective sensor
Interval: once prior to establishing the electrical connection
Tester: competent person
Mounting
Table 6.3: Checklist – mounting the protective sensor
Items on the check list Yes No
Do the beam heights satisfy the requirements acc. to ISO 13855 (see table 6.1)?
Is the safety distance to the point of operation maintained (see chapter 6.1.1 "Calculating the safety distance")?
Is the minimum distance to reflective surfaces maintained (see chapter 6.1.3 "Minimum
distance to reflective surfaces")?
Is it ensured that protective sensors cannot mutually influence one another?
Can the point of operation or the danger zone only be accessed through the protective
field?
Is it ensured that the protective field cannot be circumvented?
Do the transmitter and receiver connections point in the same direction?
Is the protective sensor mounted acc. to the corresponding instructions provided by the
manufacturer?
Is the protective sensor accessible for testing and replacing?
Is it ensured that the start/restart button cannot be activated from within the danger
zone?
Can the entire danger zone be seen from the installation site of the start/restart button?
Leuze electronic MSI-TRMB 22
7 Electrical connection
DANGER
Risk of death by electric shock!
Depending on external wiring, dangerous voltages may be present at the switching outputs.
ª During all work at the electrical system or electronics, make certain that each voltage supply has been
interrupted and protected against being restarted.
The following must be observed for the current supply of the safety relay:
• Supply voltage 24 V DC +25 % / -20 %.
• Safe mains separation acc. to IEC 60742 possible.
• A corresponding power supply unit handles interruptions of the supply voltage up to 10 ms in duration acc. to IEC 61496-1.
WARNING
Improper electrical connection may result in serious injury!
ª Only allow competent persons to perform the electrical connection.
ª Make certain that supply and signal lines are laid separately from power lines.
ª Use appropriate spark extinction for contactors in the cabinet.
ª Observe the installation notices and operating instructions of the products that are to be connected via
the safety relay (drive motors, brakes, etc.).
Electrical connection
The following conditions apply for the electrical connection:
• The safety relay is to be integrated in the control acc. to ISO 13849-1.
• No safety-relevant signal is connected via signal output S31.
• There are always two switching contacts integrated in the system switch-off circuit.
• Relay switching contacts are fused/protected externally according to their specifications (see
table 14.3).
NOTICE
Laying cables!
ª Lay all connection cables and signal lines within the electrical installation space or permanently in
cable ducts.
ª Lay the cables and lines so that they are protected against external damages.
ª For further information: see ISO 13849-2, Table D.4.
7.1 Terminal assignments
WARNING
Selecting the wrong functions may result in serious accidents!
ª Always connect protective sensors to an external safety relay and activate the restart interlock.
ª For access guarding, make certain that the restart interlock cannot be unlocked from within the danger
zone but that the danger zone can be viewed from the start button.
ª Select the functions so that the safety relay is used as intended (see chapter 2.1 "Intended use and
foreseeable misuse").
Connected to the safety relay are 16 numbered terminals to which the cables for the various functions are
connected.
Leuze electronic MSI-TRMB 23
Table 7.1: Terminal assignments
Electrical connection
Terminal Function “1 AOPD”:
one or more protective sensors connected in series
S11 Control output /
transmitter connection
S12 Function identifier:
Function “2 AOPD”:
Two rows each with at least
one protective sensor
Control output /
transmitter connection 1
Safety input / transmitter 1 Safety input /
Bridge S12 to S21
S21 Control output /
transmitter connection 2
S22 Safety input /
receiver
S31 Semiconductor output
ERROR
S32 Function identifier:
not connected
Safety input /
receiver 2
Semiconductor output
ERROR
Function identifier:
not connected
ES/E-Stop function or SG/
safety door function
Control output /
connection of E-Stop or
safety door channel 1
connection of E-Stop or
safety door channel 1
Control output /
connection of E-Stop or
safety door channel 2
Safety input /
connection of E-Stop or
safety door channel 2
Semiconductor output
ERROR
Function identifier:
Bridge to S11
S33 Start application: automatic
and non-monitored start
S34
(restart interlock)
Start application: automatic
and non-monitored start
(restart interlock)
Start application: automatic
and non-monitored start
(restart interlock)
A1 +24 V +24 V +24 V
S35 Start application: monitored
start (restart interlock)
Start application: monitored
start (restart interlock)
Start application: monitored
start (restart interlock)
S36
A2 GND GND GND
13 OSSD-1 OSSD-1 OSSD-1
14
23 OSSD-2 OSSD-2 OSSD-2
24
Configuration of start application
Further information see chapter 4.7.
Table 7.2: Configuration of start application
Function Terminals
Operation with start/restart interlock (monitored
Start button between terminal S35 and S36
start)
Non-monitored start / automatic start Start button / bridge between terminal S33 and S34
ª Trigger a reset (software reset via the start button if the device is in the error state, or b y b r i e f l y s w itching
off the voltage supply to A1).
The new settings are accepted.
Leuze electronic MSI-TRMB 24
Electrical connection
0V
Var . B
Var . A
+24V
St at e
Er ro r
MSI-TRMB
active
Receiver
0V + 24V
1 AOPD
St ar t
-K1
-K2
S11
-A3
A2
S22 S12 S3 6 S3 5
S31 14 24
S21 13 23
-K2-K1
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
2
1
2
44
3
-A2
1 A1
0V
+24V
PE
L- L+
+ 24V
0V
PE
L+ L-
3
1
Transmitter
-A1
+24V
0V
EDM configuration
Further information see chapter 4.7.
Table 7.3: EDM configuration
Function Terminals
EDM selected Monitored start: External device monitoring circuit (EDM) is connected to the start
button and terminal S35 in series relative to the starter button
Non-monitored start: External device monitoring circuit (EDM) is connected to the
start button and terminal S34 in series relative to the starter button
Automatic start: External device monitoring circuit (EDM) is connected to terminals
S33 and S34 in place of the bridge for automatic start
ª Trigger a reset (software reset via the start button if the device is in the error state, or b y b r i e f l y s w itching
off the voltage supply at A1 / using reset button connected in series to the supply voltage at A1).
The new settings are accepted.
Connection examples
Figure 7.1: Safety monitoring device with one protective sensor with monitored start (restart interlock)
Leuze electronic MSI-TRMB 25
Electrical connection
0V
Var . B
Var . A
+24V
St at e
Er ro r
MSI-TRMB
active
Receiver
0V + 24V
1 AOPD
-K1
-K2
S11
-A3
A2
S22 S12 S3 3 S3 4
S31 14 24
S21 13 23
-K2-K1
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
2
1
2
44
3
-A2
1 A1
0V
+24V
PE
L- L+
+ 24V
0V
PE
L+ L-
3
1
Transmitter
-A1
+24V
0V
+24V
Receiver
0V
Transmitter
MSI-TRMB
+24V
0V
active
State
Error
0V
+24V
Transmitter
0V
+24V
Receiver
0V
+24V
0V
Transmitter
+24V
0V
Receiver
active
active
Var. A
Var. B
S22
3
-A7
A2
-A1
S11 A1 S12 S36 S35
S31 14 24
13 23
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
-A3
4
1
S21
4
3
-A5
1 4 3
-A2
1 4 3
1 4 3
-A4
1 4 3
-A6
-K2
-K1
-K2-K1
0V
+24V
0V
PE
+24V
PE
L- L+
L+ L-
Start
Figure 7.2: Safety monitoring device with one protective sensor with automatic start and non-monitored
start
Figure 7.3: Safety monitoring device with series connection consisting of multiple protective sensors
with monitored start (restart interlock)
Note the total delay time of the photoelectric sensors (0.5 ms to 8.5 ms)
Leuze electronic MSI-TRMB 26
Electrical connection
+24V
Receiver
0V
Transmitter
MSI-TRMB
+24V
0V
active
State
Error
0V
+24V
Transmitter
0V
+24V
Receiver
0V
+24V
0V
Transmitter
+24V
0V
Receiver
active
active
Var. A
Var. B
S22
3
-A7
A2
-A1
S11 A1 S12 S33 S34
S31 14 24
13 23
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
-A3
4
1
S21
4
3
-A5
1 4 3
-A2
1 4 3
1 4 3
-A4
1 4 3
-A6
-K2
-K1
-K2-K1
0V
+24V
0V
PE
+24V
PE
L- L+
L+ L-
Betriebsart
Figure 7.4: Safety monitoring device with series connection consisting of multiple protective sensors
with automatic start
Note the total delay time of the photoelectric sensors (0.5 ms to 8.5 ms)
Leuze electronic MSI-TRMB 27
Electrical connection
0V
Var . B
Var . A
+24V
MSI-TRMBReceiver
0V
+ 24V
-K1
-K2
S22
-A3
A2
S21 S12 S11 S36 S35
S31 14 24
A1 13 23
-K2-K1
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
2
1
2
44
3
-A2
1
0V
+24V
PE
L- L+
+ 24V
0V
PE
L+ L-
3
1
Transmitter
-A1
St ar t
active
+ 24V
0V
Receiver
0V
+ 24V
44
3
-A5
1
3
1
Transmitter
-A4
active
+ 24V
0V
St at e
Error
Figure 7.5: Safety monitoring device with two protective sensors with monitored start (restart interlock)
Leuze electronic MSI-TRMB 28
Electrical connection
0V
Var . B
Var . A
+24V
MSI-TRMBReceiver
0V
+ 24V
-K1
-K2
S22
-A3
A2
S21 S12 S11 S33 S34
S31 14 24
A1 13 23
-K2-K1
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
2
1
2
44
3
-A2
1
0V
+24V
PE
L- L+
+ 24V
0V
PE
L+ L-
3
1
Transmitter
-A1
active
+ 24V
0V
Receiver
0V
+ 24V
44
3
-A5
1
3
1
Transmitter
-A4
active
+ 24V
0V
St at e
Error
Figure 7.6: Safety monitoring device with two protective sensors with automatic start
Leuze electronic MSI-TRMB 29
Electrical connection
+24V
-A1
-A3
-A5
1
+24V
Transmitter
1 4 3
+24V
Receiver
1 4 3
+24V
Transmitter
4
active
active
+24V
-K1
3
0V
-A2
-A4
0V
-A6
0V
1 4 3
+24V
Receiver
1 4 3
+24V
Transmitter
1 4 3
+24V
Receiver
active
0V
Start
L- L+
-K2
-A7
S12
S11 A1 S36 S35
0V
0V
MSI-TRMB
S21
S22
0V
A2
13 23
State
Error
S31 14 24
A1
-K1
A2
L+ L-
-K2
A1
A2
Var. B
3
1
0V
PE
-A8
-A11
-A13
+24V
Transmitter
1 4 3
+24V
Receiver
1 4 3
+24V
Transmitter
4
active
active
-A9
0V
-A12
0V
-A14
0V
1 4 3
+24V
Receiver
1 4 3
+24V
Transmitter
1 4 3
+24V
Receiver
active
0V
-K1
Var. A
-K2-K1
-K2
0V
0V
0V
PE
Figure 7.7: Safety monitoring device with two series connections consisting of multiple protective sen-
sors with monitored start (restart interlock)
Note the total delay time of the photoelectric sensors (0.5 ms to 8.5 ms)
Leuze electronic MSI-TRMB 30
Electrical connection
+24V
Receiver
0V
Transmitter
MSI-TRMB
+24V
0V
active
State
Error
0V
+24V
Transmitter
0V
+24V
Receiver
0V
+24V
0V
Transmitter
+24V
0V
Receiver
active
active
Var. A
Var. B
S12
3
-A7
S21
-A1
S11 A1 S33 S34
S31 14 24
13 23
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
-A3
4
1 4 3
-A5
1 4 3
-A2
1 4 3
1 4 3
-A4
1 4 3
-A6
-K2
-K1
-K2-K1
0V
+24V
0V
PE
+24V
PE
L- L+
L+ L-
+24V
Receiver
Transmitter
+24V
0V
active
0V
+24V
Transmitter
0V
+24V
Receiver
0V
+24V
0V
Transmitter
+24V
0V
Receiver
active
active
3
-A8
1
-A11
4
1 4 3
-A13
1 4 3
-A9
1 4 3
1 4 3
-A12
1 4 3
-A14
S22
A2
Figure 7.8: Safety monitoring device with two series connections consisting of multiple protective sen-
sors with automatic start
Note the total delay time of the photoelectric sensors (0.5 ms to 8.5 ms)
Leuze electronic MSI-TRMB 31
Electrical connection
0V
Var . B
Var . A
+24V
St at e
Er ro r
MSI-TRMB
-K1
-K2
A2
S11 S36 S35
S31 14 24
S32 13 23
-K2-K1
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
2
1
2
S11 S12 A1
0V
+24V
PE
L- L+
+ 24V
0V
PE
L+ L-
-A1
S22 S21
0V
Var . B
Var . A
+24V
St at e
Er ro r
MSI-TRMB
-K1
-K2
A2
S11 S36 S35
S31 14 24
S32 13 23
-K2-K1
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
2
1
2
S11 S12 A1
0V
+24V
PE
L- L+
+ 24V
0V
PE
L+ L-
-A1
S22 S21
Start
S1 S2
Figure 7.9: Safety sequential device for 2-channel E-Stop monitoring with monitored start (restart inter-
lock)
Figure 7.10: Safety sequential device for 2-channel safety door monitoring with monitored start (restart
interlock)
Leuze electronic MSI-TRMB 32
Electrical connection
0V
Var . B
Var . A
+24V
St at e
Er ro r
MSI-TRMB
-K1
-K2
A2
S11 S33 S34
S31 14 24
S32 13 23
-K2-K1
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
2
1
2
S11 S12 A1
0V
+24V
PE
L- L+
+ 24V
0V
PE
L+ L-
-A1
S22 S21
S1 S2
Figure 7.11: Safety sequential device for 2-channel safety door monitoring with automatic start and non-
monitored start (restart interlock)
Leuze electronic MSI-TRMB 33
8 Starting up the device
WARNING
Improper use of the safety relay may result in serious injury!
ª Make certain that the entire device and the integration of the optoelectronic protective device or the
E-Stop switch or safety door switch was inspected by competent and instructed persons.
ª Make certain that a dangerous process can only be started while the safety sensor is switched on.
Prerequisites:
• The protective sensor, E-Stop switch or safety door switch and safety relay were mounted and connected in accordance with the respective instructions.
• Operating personnel were instructed on proper use.
• The dangerous process has been switched off, the outputs of the protective sensor in the case of
photoelectric sensor applications have been disconnected and measures have been taken to prevent the system from being switched on again.
ª During start-up, test the function of the safety relay (see chapter 9 "Testing").
8.1 Switching on
Starting up the device
Requirements for the supply voltage (power supply unit):
• Safe mains separation is ensured (acc. to IEC 60742).
• Changes and interruptions of the supply voltage are handled (acc. to IEC 61496-1).
• The start/restart interlock function is connected and activated.
ª Switch on the current supply.
ª Check whether the “PWR” LED on the safety relay lights up.
The safety relay is ready for use.
8.2 Start/restart
The start/restart button can be used to unlock the start/restart interlock. In this way, the responsible person
can restore normal operation of the system following process interruptions (triggering of the protective
function, failure of the voltage supply) (see chapter 8.2.1 "Unlocking start/restart interlock").
With automatic start, it remains unlocked for as long as connection terminals S33 and S34 are bridged.
8.2.1 Unlocking start/restart interlock
WARNING
Premature unlocking of the start/restart interlock may result in serious injury!
If the start/restart interlock is unlocked, the system can start up automatically.
ª Before unlocking the start/restart interlock, make certain that no people are in the danger zone.
The red and yellow LEDs illuminate as long as the restart is disabled.
ª Make certain that the active protective field is clear.
ª If the active protective field is not clear, select a different procedure.
ª Make certain that there are no people in the danger zone.
ª Press the start/restart button and release it again (after 0.06 … 4 s).
The safety relay switches back to the “ON” state.
Leuze electronic MSI-TRMB 34
9 Testing
WARNING
A running machine may result in serious injury!
ª Make certain that, during all conversions, maintenance work and inspections, the system is securely
shut down and protected against being restarted.
The safety relays must be exchanged after a maximum of 20 years.
ª Always exchange the entire safety relay.
ª For the tests, observe nationally applicable regulations.
ª Document all tests in a comprehensible manner.
9.1 Before the initial start-up and following modifications
Acc. to IEC 62046 and national regulations, tests are to be performed by competent persons in the
following situations:
• Prior to the initial start-up
• Following modifications to the machine
• After longer machine downtime
• After retrofitting or reconfiguring the safety device (safety relay and/or protective sensor)
Testing
WARNING
Unpredictable machine behavior during initial start-up may result in serious injury!
ª Make certain that there are no people in the danger zone.
ª Test the effectiveness of the shutdown function in all operating modes of the machine acc. to the corre-
sponding checklist see chapter 9.1.1 "Checklist – initial start-up".
ª Document all tests in a comprehensible manner and include the configuration of the safety relay along
with the data for the safety and minimum distances in the documentation.
ª Before they begin work, train the operating personnel on their respective tasks. The training is the
responsibility of the operating company.
ª Check whether the safety relay was correctly selected acc. to the locally applicable regulations and
directives.
ª Check whether the safety relay is operated acc. to the specified environmental conditions (see
chapter 14 "Technical data").
ª Make certain that the safety relay is protected against overcurrent.
ª Perform a visual inspection for damage and test the electrical function see chapter 9.2 "To be performed
periodically by a competent person".
Minimum requirements for the power supply unit:
• Safe mains separation.
• Power-failure bridging for at least 10 ms.
Not until proper function of the optoelectronic safety device or the E-Stop switch or safety door switch and
safety relay is ascertained may they be integrated in the control circuit of the system.
As a safety inspection, Leuze electronic offers testing by a competent person prior to commis-
sioning (see chapter 13 "Service and support").
9.1.1 Checklist – initial start-up
Interval: once, prior to the initial start-up and following modification
Tester: competent person
Leuze electronic MSI-TRMB 35
Table 9.1: Checklist – initial start-up
Items on the check list Yes No
Were all safety directives and standards relevant to this machine type observed?
Does the declaration of conformity of the machine include a listing of these documents?
Does the safety relay satisfy the safety-related capability (PL, SIL, category) as
required by the risk assessment?
Circuit diagram: Are the safety-related switching outputs (OSSDs) integrated in the
downstream machine control acc. to the required safety category?
Are the switching elements (e.g. contactors) with positive-guided contacts that are controlled by the safety relay monitored by an external device monitoring circuit (EDM)?
Does the electrical wiring match the circuit diagrams?
Have the required protective measures against electrical shock been effectively implemented?
Has the maximum stopping time of the machine been remeasured and recorded in the
machine documents?
Testing
Is the required safety distance (protective field to the next point of operation) maintained? (With optoelectronic applications only)
Are all points of operation of the machine accessible only through the protective field?
Are all additional protective devices (e.g. safety guards) correctly mounted and protected against tampering?
Is the command device for triggering the start/restart interlock of the safety relay or the
machine mounted in accordance with specifications? (Not in applications with automatic start)
Are safety relay, connecting cable, plug, protection caps and command devices
undamaged and free of any signs of manipulation?
Has the effectiveness of the protective function been ensured for all operating modes of
the machine by means of a function test?
Is the start/restart button for resetting the safety relay mounted outside of the danger
zone in accordance with specifications in such a way that it cannot be reached from
within the danger zone? Can the entire danger zone be seen from the place at which
the start/restart button is installed? (not in applications with automatic start)
Does the interruption of any given beam cause the dangerous movement to stop?
(With optoelectronic applications only)
When the AOPD is separated from its supply voltage, does the dangerous movement
stop, and, after the supply voltage has been restored, is it necessary to actuate the
start/restart button to reset the machine? (Only with optoelectronic applications with or
without monitored start)
Is the safety relay/protective sensor effective during the entire dangerous movement of
the machine?
Are the notices for daily testing of the safety sensor legible to the operating personnel
and are they located in a highly visible location?
ª Store this checklist with the machine documents.
Leuze electronic MSI-TRMB 36
9.2 To be performed periodically by a competent person
The reliable interaction of safety sensor, safety relay and machine must be periodically tested in order to
detect changes to the machine or impermissible tampering with the safety sensor. Testing intervals are
determined by nationally applicable regulations (recommendation acc. to IEC 62046: 12 months).
ª Have all tests performed by competent persons.
ª Observe the nationally applicable regulations and the time periods specified therein.
As a safety inspection, Leuze electronic offers periodic testing by a competent person (see
chapter 13 "Service and support").
9.3 To be performed daily by the operating personnel
The function of the safety relay must be checked daily or at change of shifts, and at each change of
machine operating mode as specified in the corresponding checklist (see chapter 9.3.1 "Check list – daily
or at change of shift") so that damages or unauthorized manipulations can be detected.
WARNING
Unpredictable machine behavior during the test may result in serious injury!
ª Make certain that there are no people in the danger zone.
Testing
WARNING
Faults during the daily inspection may result in serious injury!
If you answer one of the items on the check list with “no”, the machine must no longer be operated (see
table 9.2).
ª Have the entire machine inspected by a competent person see chapter 9.1 "Before the initial start-up
and following modifications".
ª For configurations without automatic start:
Stop the dangerous state.
ª Check the safety relay, E-Stop or safety door switch, transmitter, receiver of the AOPDs and, if applica-
ble, deflecting mirrors for damage or tampering.
ª Operation as downstream device for ESPE: Interrupt the light beam of the protective sensor using a test
rod from a position outside the danger zone and ensure that the machine cannot be started when the
light beam is interrupted. Operation as downstream device for E-Stop / safety door: Press the E-Stop
switch or open the safety door and make sure that the machine cannot be started with the E-Stop switch
pressed or the safety door open.
ª Start the machine.
For all configurations:
ª Make sure that the dangerous state is stopped as soon as a light beam is interrupted with a test rod, the
E-Stop switch is pressed or the safety door is opened.
9.3.1 Check list – daily or at change of shift
Interval: daily or at shift change
Tester: authorized operating personnel or instructed person
Leuze electronic MSI-TRMB 37
Table 9.2: Check list – daily or at change of shift
Items on the check list Yes No
Are safety relay, protective sensor and E-Stop switch or safety door switch, connecting
cables, connectors and command devices undamaged and free of any signs of manipulation?
Are all points of operation at the machine accessible only through one or more protective fields of protective sensors?
Are all additional protective devices mounted correctly (e.g., safety guard)?
Are all E-Stop switches freely accessible?
Does the start/restart interlock prevent the automatic start-up of the machine after the
protective sensor/safety relay has been switched on or activated?
ª Interrupt a light beam of the protective sensor with a test object during operation.
Is the dangerous movement shut down immediately?
Testing
Leuze electronic MSI-TRMB 38
10 Maintenance
The safety relay is maintenance-free.
Maintenance
Leuze electronic MSI-TRMB 39
11 Troubleshooting
11.1 What to do in case of failure?
After switching the safety relay on, the display elements (LEDs, see chapter 3.2 "Display elements", see
chapter 3.3 "Error display") assist in checking the correct functionality and in troubleshooting.
In case of error, you can determine the error from the LED displays. With the error message you can determine the cause of the error and initiate measures to rectify it.
NOTICE
If the safety relay indicates a fault, it may be defective.
ª Switch off the machine and leave it switched off.
ª Analyze and eliminate the cause of the fault, see chapter 3.3 "Error display".
ª If you are unable to rectify the fault, contact the Leuze branch responsible for you or call the Leuze
electronic hotline.
Troubleshooting
Leuze electronic MSI-TRMB 40
12 Disposing
ª For disposal observe the applicable national regulations regarding electronic components.
Disposing
Leuze electronic MSI-TRMB 41
13 Service and support
24-hour on-call service at:
+49 7021 573-0
Service hotline:
+49 7021 573-123
E-mail:
service.protect@leuze.de
Return address for repairs:
Service center
Leuze electronic GmbH + Co. KG
In der Braike 1
D-73277 Owen / Germany
Service and support
Leuze electronic MSI-TRMB 42
14 Technical data
14.1 General specifications
Table 14.1: Safety-relevant technical data
Type in accordance with IEC 61496 Type 4
SILCL in accordance with IEC 62061 SILCL 3
Performance Level (PL) in accordance with ISO 13849-1 Up to PL e
Category in accordance with ISO 13849-1 Category 4
Technical data
Probability of a dangerous failure per hour (PFH
Mean time to dangerous failure (MTTF
Mission time (T
) 20 years
M
) > 100 years
d
) 2.15x10-9 1/h
d
Table 14.2: Electrical data, degree of protection, environment, cable data
Operating voltage U
b
+24 V DC 20 % (SELV)
Voltage range 80 - 125 %
Residual ripple < 15 %
Power consumption at UB without load < 3 W
Current consumption Approx. 200 mA
Response time 130 ms
Sensor response time on test request 0.5 … 8.5 ms
Protection class III
Degree of protection of housing and terminals IP20 (only suitable for use in operating rooms/cabi-
nets with minimum protection degree of IP54)
Ambient temperature, operation –25 … +55 °C
Ambient temperature, storage –25 … +75 °C
Relative humidity (non-condensing) < 75 %
Impact resistance 10 g
Dimensions see chapter 14.2 "Dimensions"
Weight Max. 155 g
Conductor connection (wire) 0.2 mm² … 1.5 mm²
Tightening torque for connection terminals 0.5 … 0.6 Nm
Max. cable lengths (reset circuit) 250 m
Example for max. cable length, for:
Conductor cross section 1.5 mm²
Capacity 150 nF/km
Leuze electronic MSI-TRMB 43
Technical data
Resistance 11.7 Ohm/km
Max. cable lengths (reset circuit) 250 m
Max. cable lengths (input circuit) 250 m
Table 14.3: Inputs/outputs
Max. load of control outputs S11, S21 IMax ≤ 50 mA / 24 V DC, short-circuit proof
Transmitter activation PNP (high active)
Receiver input Input current approx. 5 mA
Start inputs S34, S35 (depending on application) Typ. input current 8 mA / 24 V DC
Safety inputs S12, S22 Typ. input current 8 mA / 24 V DC
Reset input Input current approx. 5 mA
Contactor monitoring (EDM) Typ. input current 8 mA / 24 V DC
S31 signal output PNP transistor output, ≤ 50 mA / 24 V DC, short-
circuit proof
"Error" signal output PNP transistor output, 100 mA, short-circuit and
Safety output 2 potential-free NO contacts
Fuse External with max. 3 A F or 3 A T
Overvoltage category 3 for rating voltage 300 V AC acc. to EN 50178
14.2 Dimensions
S11 S12 S21 S22
S31 S32 S33 S34
MSI-TRMB
OUT1 IN1 PWR
OUT2 IN2 Fault
14 23
13
24
A1 S35 S36 A2
13 14 23 24
polarity reversal protection
5 … 250 V AC/DC, 5 mA … 3 A
111. 5
99.0
22.5
114.1
Figure 14.1: MSI-TRMB-01 dimensions
Leuze electronic MSI-TRMB 44
Technical data
22.5
111
114.1
111. 5
S11 S12 S21 S22
S31 S32 S33 S34
A1 S35 S36 A2
13 14 23 24
OUT1 IN1 PWR
OUT2 IN2 Fault
13
14 23
24
MSI-TRMB
Figure 14.2: MSI-TRMB-02 dimensions
Leuze electronic MSI-TRMB 45
15 Order guide and accessories
Table 15.1: MSI-TRMB safety relay
Part no. Article Description
547931 MSI-TRMB-01 Safety relay for type 4 protective sensors, screw terminals
547932 MSI-TRMB-02 Safety relay for type 4 protective sensors, spring-cage terminals
Order guide and accessories
Leuze electronic MSI-TRMB 46
16 Declaration of Conformity
Declaration of Conformity
Leuze electronic MSI-TRMB 47
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