Leuze electronic TMC 66 Quick start guide

TMC 66
Test Monitoring Unit with integrated muting controller
607109 - 2010/08 Subject to change without prior notice
CONNECTING AND OPERATING INSTRUCTIONS
Original Instructions

2 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
Notes on Connecting and Operating Instructions
This connecting and operating instructions manual contains information on the proper use
of the test monitoring unit with integrated muting controller TMC 66 in accordance with its
intended purpose.
All the information contained herein, in particular the safety notes, need to be carefully
observed.
Notes regarding safety and warnings are marked by this symbol .
Notes regarding important pieces of information are marked by the symbol .
This connecting and operating instructions manual must be stored carefully. It must be
available for the entire operating time of the test monitoring unit with integrated muting
controller TMC 66.
The Leuze electronic GmbH + Co. KG is not liable for damages caused by improper
use. Acquaintance with these instructions is an element of the knowledge required
for proper use.
© Reprints and reproduction, in whole or in part, are permitted only with the explicit
permission of
Leuze electronic GmbH + Co. KG
In der Braike 1
D-73277 Owen - Teck / Germany
Telefon[phone] / 573-0
Fax[phone] / 573-199
[email protected]
www.leuze.com

Inhaltsverzeichnis
Leuze electronic TMC 66 3
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
1 General Information...........................................................................................................5
1.1 Certifications ........................................................................................................................5
1.2 General Information ............................................................................................................. 5
1.3 Definition of Terms ............................................................................................................... 5
1.4 Selection of Active Opto-electronic Protective Devices .......................................................6
2 Safety ..................................................................................................................................8
2.1 Approved purpose and foreseeable improper operation...................................................... 8
2.1.1 Proper use............................................................................................................................8
2.1.2 Foreseeable misuse........................................................................................................... 10
2.2 Competent personnel ......................................................................................................... 10
2.3 Responsibility for safety .....................................................................................................10
2.4 Exemption of liability .......................................................................................................... 11
2.5 Fields of Application ........................................................................................................... 11
2.6 Organizing Measures ......................................................................................................... 11
3 Function and Commissioning.........................................................................................12
3.1 Function Characteristics of the Safety System .................................................................. 12
3.2 Display and Operating Instruments....................................................................................13
3.2.1 Overview - Display and Operating Elements .....................................................................13
4 Mounting of the Safety System.......................................................................................15
4.1 Mounting of the Test Monitoring Unit TMC 66 ................................................................... 15
4.2 Mounting of the Single Beam Safety Light Barrier .............................................................15
4.2.1 Multi-axis Installation.......................................................................................................... 17
4.2.2 Muting Basics..................................................................................................................... 19
5 Electrical Installation .......................................................................................................25
5.1 Supply Wiring ..................................................................................................................... 25
5.2 Start Input Wiring ............................................................................................................... 25
5.3 Wiring of Single-beam Single Beam Safety Light Barriers...........................................................27
5.4 Wiring of Single Beam Safety Light Barrier in Series Connection................................................28
5.5 Wiring Control Signals..................................................................................................................29
5.6 Wiring of the muting light signals ....................................................................................... 29
5.7 Wiring of the Muting Signals Start 1 and Start 2 ................................................................30
5.8 Wiring Safety Output ....................................................................................................................32
5.9 Wiring of the Signal Outputs ..............................................................................................33
5.10 Selecting of the Operating Mode..................................................................................................35
5.11 Starting the unit when the single beam safety light barrier is interrupted...........................36
5.12 Operating Conditions without Muting Function ..................................................................37
5.13 TMC 66 without muting function, with start- and restart interlock ......................................38
5.14 Modes with muting function................................................................................................ 40

Inhaltsverzeichnis
4 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
6 Error Messages on the TMC 66 ...................................................................................... 46
7 Technical Data.................................................................................................................. 48
8 Appendix........................................................................................................................... 50
8.1 Wiring diagram with Single Beam Safety Light Barrier and PLC as muting sender........... 50
8.2 Remaining risks (EN ISO 12100-1).................................................................................... 50

General Information
Leuze electronic TMC 66 5
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
1 General Information
1.1 Certifications
The test monitoring unit with integrated muting controller TMC 66 has been manufactured
observing current European directives and international standards.
The manufacturer of the test monitoring unit TMC 66, Leuze electronic GmbH+Co. KG in
D-73277 Owen/Teck, possesses a certified quality assurance system in accordance with
ISO 9001.
1.2 General Information
An active optoelectronic protective device is part of the electrical equipment which has to
be applied to those machines which contain the potential risk of bodily injury. They provide
protection by causing the machine to move into a safe operating state before a person can
get into a dangerous situation (EN 61496-1).
1.3 Definition of Terms
AOPD type 2
The EN 61496 describes two types of active active opto-electronic protective devices
(AOPD) with respect to the requirements concerning safety relevant parts of control units
(ISO 13849-1).
The AOPD type 2 fulfills the requirements of category 2 acc. to ISO 13849-1. A periodic
function test has to detect malfunctions in the safety function. In case of a failure, the next
machine cycle may not be released. A malfunction of the AOPD type 2 between the
testings can cause the loss of the safety function. In normal function, at least one safety
output of the AOPD type 2 has to move into the OFF-position if the sensor reacts or if the
power supply of the AOPD is interrupted.
Safety output (OSSD)
The part of the AOPD which is connected to the machine control and which moves into the
OFF-position as soon as the sensor part reacts during normal operation.
Start interlock
An equipment which disables the automatic machine start if the power supply of the
contactless active protective device is switched on or if it had been interrupted and
switched on again.
Start testing
A manual or automatic test which is performed after the contactless active protective
device has been switched on. It tests the complete safety-relevant control system before
the normal machine operation is induced.

General Information
6 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
Muting
The intentional bypassing of the safety function, e.g. during material transport into the
hazardous area.
Muting sensors
Muting sensors differentiate between persons and transported material. If the muting
sensors are activated simultaneously or in the intended order, the safety function of the
AOPD is bypassed. Material can be brought into the hazardous area without taking the
machine out of operation.
Contactor monitoring
The contactor monitoring checks before every release of the switching outputs if the
succeeding contactors are open. Only then, a new release is possible.
Restart interlock
An equipment which disables the automatic restart of the machine after the sensor part has
reacted during a dangerous part of the machine cycle, a change of the operating mode,
and/or operator mode of the machine.
1.4 Selection of Active Opto-electronic Protective Devices
The following strategy is to be applied (iterative process):
1. Determination of the protected area
2. Determination of the protective function
• Finger or hand protection
• Access protection for persons
• Presence detection
3. Determination of the control category
4. Calculation of the safety distance
Determination of the protected area
Through risk calculation, the following has to be observed:
• the size of the protective field
• the access points
• the hazardous areas
• Bypassing possibilities

General Information
Leuze electronic TMC 66 7
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
Determination of the protective function
Finger and hand protection: The user is close to the hazardous area.
Access protection: Access to the hazardous area is protected.
Presence detection: A hazardous area which is completely surrounded by
permanently installed protective devices is monitored
for presence of objects or access protection and pres-
ence detection are combined.

Safety
8 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
2Safety
Before using the Test Monitoring Unit, a risk evaluation must be performed according to
valid standards (e.g. EN ISO 14121, EN ISO 12100-1, ISO 13849-1, IEC 61508,
EN 62061). The result of the risk assessment determines the required safety level of the
Test Monitoring Unit (see Tabelle 2.1-1). For mounting, operating and testing, document
"TMC 66 Test Monitoring Units with integrated muting controller" as well as all applicable
national and international standards, regulations, rules and directives must be observed.
Relevant and supplied documents must be observed, printed out and handed to the
affected personnel.
Before working with the Test Monitoring Unit, 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 Test Monitoring Units:
• Machinery directive 2006/42/EC
• Low voltage directive 2006/95/EC
• Electromagnetic compatibility directive 2004/108/EC
• Use of Work Equipment Directive 89/655/EEC supplemented by Directive 95/63 EC
• OSHA 1910 Subpart 0
• Safety regulations
• Accident-prevention regulations and safety rules
• Ordinance on Industrial Safety and Health and Labor Protection Act
• Device Safety Act
Notice!
For safety-related information you may also contact the local authorities (e.g., industrial
inspectorate, employer's liability insurance association, labor inspectorate, occupational
safety and health authority).
2.1 Approved purpose and foreseeable improper operation
Warning!
A running machine can cause severe injuries!
Make certain that, during all conversions, maintenance work and inspections, the system is
securely shut down and protected against being restarted again.
2.1.1 Proper use
The Test Monitoring Unit 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 occupational safety, and after it has been installed on the
machine, connected, commissioned, and checked by a competent person.
When selecting the Test Monitoring Unit it must be ensured that its safety-related capability
meets or exceeds the required performance level PLrascertained in the risk assessment.

Safety
Leuze electronic TMC 66 9
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
Listed in the following table are the safety-related characteristic parameters of the TMC 66
Test Monitoring Units with integrated muting controller.
Table 2.1-1: Safety-related characteristic parameters of the TMC 66 Test Monitoring
Units with integrated muting controller.
• The Test Monitoring Unit is used in combination with one or more Multiple Light Beam
Safety Devices or Safety Light Curtains to safeguard danger zones or points of
operation.
• The control of the machine or system that is to be safeguarded must be electrically
influenceable. A switch command initiated by a TMC 66 must result in an immediate
shutdown of the dangerous movement.
• The "Reset" acknowledgment button for unlocking the start/restart interlock must be
mounted in such a way that the entire danger zone can be seen from its mounting
location.
• Message outputs (state outputs) must not be used for switching safety-relevant signals.
• The Test Monitoring Unit is designed for installation in a cabinet or a protective housing
with a protection rating of at least IP 54.
• The 24 V DC ±20% power supply must guarantee safe isolation from the mains voltage
and be able to bridge a power outage period of 20 ms.
Type in accordance with IEC/
EN 61496 Type 2
Performance Level (PL) in ac-
cordance with ISO 13849-1:
2008
PL d
Category in accordance with
ISO 13849-1 Cat. 2
Mean probability of a danger-
ous failure per hour (PFHd) as a
function of the mean number of
annual switching cycles of the
relay nop*
nop = 4,800: 1.4 x 10-8 1/h
nop = 28,800: 3.1 x 10-8 1/h
nop = 86,400: 7.9 x 10-8 1/h
Mean time to dangerous failure
(MTTFd)nop = 4,800: 250 years
nop = 28,800: 100 years
nop = 86,400: 40 years
*nop = mean number of annual actuations, see C.4.2 and C.4.3 of ISO 13849-1: 2008
Use the following formula to calculate the mean number of annual actuations:
In doing so, make the following assumptions with regard to the use of the component:
hop = mean operating time in hours per day
dop = mean operating time in days per year
tcycle = mean time between the start of two successive cycles of the component (e.g switching of a
valve) in seconds per cycle
nop dop hop 3600s/h⋅⋅()tZyklus ÷=

Safety
10 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
• Depending on external wiring, dangerous voltages may be present at the switching
outputs. In addition to the power supply, these must be switched off and safeguarded
against being switched back on prior to all work on the TMC 66.
• These operating instructions must be included with the documentation of the machine on
which the protective device is installed so that they are available to the operator at all
times.
• Manipulating the Test Monitoring Unit also voids all warranty claims against the
manufacturer of the Test Monitoring Unit.
• The Test Monitoring Unit must be tested regularly by competent personnel.
• The safety distance between the AOPD and the point of operation is to be maintained. It
is calculated according to the formulas for machine-specific C standards or given in the
general B1 standard ISO 13855. The reaction time of the Test Monitoring Unit and the
braking time of the machine must be taken into account.
• Two switching contacts must always be looped into the switch-off circuit of the machine.
To prevent welding, relay switching contacts must be fused/protected externally accord-
ing to the technical data.
The Test Monitoring Unit must be exchanged after a maximum of 20 years. Repairs or the
exchange of parts subject to wear and tear do not extend the service life.
2.1.2 Foreseeable misuse
Any use other than that defined under the "intended use" or which goes beyond that use is
considered improper use!
e.g.
• applications in explosive or easily flammable atmospheres
Attention!
Such instances can jeopardize the health and lives of the personnel operating the
machinery and/or may cause damage to property.
2.2 Competent personnel
Prerequisites for competent personnel:
• he has a suitable technical education
• he knows the rules and regulations for occupational safety, safety at work and safety
technology and can assess the safety of the machine
• he knows the instructions for the Test Monitoring Unit and the machine
he has been instructed by the responsible person on the mounting and operation of the
machine and of the Test Monitoring Unit
2.3 Responsibility for safety
Manufacturer and operating company must ensure that the machine and implemented Test
Monitoring Unit 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.

Safety
Leuze electronic TMC 66 11
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
The manufacturer of the machine is responsible for:
• safe machine construction
• safe implementation of the Test Monitoring Unit
• imparting all relevant information to the operating company
• adhering to all regulations and directives for the safe starting-up of the machine
The company operating the machine is responsible for:
• instructing the operating personnel
• maintaining the safe operation of the machine
• adhering to all regulations and directives for occupational safety and safety at work
• regular testing by competent personnel
2.4 Exemption of liability
Leuze electronic GmbH + Co. KG is not liable in the following cases:
• Test Monitoring Unit 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
• changes are made to the Test Monitoring Unit
2.5 Fields of Application
The test monitoring unit TMC 66 may be used as isolating protective device for safeguar-
ding of hazardous areas on power driven machines.
The following areas of application are thus possible (excerpt):
• Edge, frame, star and carcass press in lumber industry acc. to prEN 691 resp. ZH 1/3.19
• Printing and paper processing machines acc. to prEN 1010
• Power driven windows, doors and portals acc. to ZH 1/494
• Storage equipment and devices acc. to ZH 1/482 and DIN 15185 part 2
• Textile machines acc. to VBG and DIN EN ISO 11 111
• Food processing equipment acc. to prEN 1672-1 resp. VBG 77
• Packaging machinery acc. to prEN 415-1 to -7 resp. VBG 76
• Meat processing equipment acc. to prEN 12463 resp. VBG 79
• Machines of the chemical, rubber and plastic industry acc. to VBG 22
2.6 Organizing Measures
Mounting, commissioning and maintenance of the device must only be carried out by
qualified personnel. Electrical work must be carried out by a certified electrician.
Adjustment and change of the protective field for the protection of persons may only be
carried out by an authorized person.

Function and Commissioning
12 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
3 Function and Commissioning
3.1 Function Characteristics of the Safety System
The complete safety system consists of a TMC 66 and accompanying single beam safety
light barriers or light barriers.
After switching on of the TMC 66 via the start input, the function of the connected single
beam safety light barriers or the integrated muting controller is cyclically monitored every 2
sec.
The electrical integration into the control has to be performed acc. to the corresponding
safety category acc. to ISO 13849-1. The voltage free safety relay outputs can be directly
used for shut-down of the dangerous movement.
Inside the test monitoring unit TMC 66, a selectable start- and restart interlock, as well as a
selectable contactor monitoring input are integrated.
Fig. 3.1-1: Architecture of the TMC safety system
Emer
g
shut-
down
Input "contactor monitoring"
Status output "Error"
Status output "Safety on"
Safety output. 1
Safety output. 2
Start 1-active
Start 1-
Start 2-active
Start 2-
Sensor/
PLC
Sensor/
PLC
Light signal 1
Control 2
Control 1
Light signal 2
Single Beam Safety Light Barrier
Transmitter Receiver
active
Start/active
Redun-
dance

Function and Commissioning
Leuze electronic TMC 66 13
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
3.2 Display and Operating Instruments
Inside the test monitoring unit TMC 66, LEDs and a 7-segment display for the system state
are integrated.
The selection switch of the start- and restart interlock as well as the contactor monitoring
are also located on the front panel under the transparent front screen.
The front screen can be removed for commissioning and for adjustment of start- and restart
interlock as well as contactor monitoring (see Figure 3.2-2).
3.2.1 Overview - Display and Operating Elements
LED 1 Status display protective field state
LED 2 Status display start/ activation input
LED 3 Status display start and restart interlock
LED 4 Status display contactor monitoring
LED 5 Status display safety circuit closed
LED 6 Status display safety circuit open
LED 7 Status display muting sensor Start 1
LED 8 Status display muting sensor Start 2
LED 9 Status display muting preparation Control 1
LED 10 Status display muting preparation Control 2
LED 11 Status display muting lamp
Status 1 State of test monitoring unit - SLS
Status 2 State of muting controller
Switch 1 Selection with/without start-/restart interlock
Switch 2 Selection with/without contactor monitoring
Fig. 3.2-1: Display and operating instruments
Switch 1
Switch 2

Function and Commissioning
14 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
Removing and mounting the front screen
The housing has carvings on both sides of the transparent front screen. The front screen
can be lifted by inserting a screw driver size 1 into these carvings.
To remount the front screen, simply press it into the fastening frame. Observe the correct
position of the code snugs.
The reset button can be activated through the hole in the transparent front screen. In case
of a failure, the device can be reset, the self-containing mode activated, and the switch
positions can be programmed by using the reset-button.
Fig. 3.2-2: Removing the front screen
Fig. 3.2-3: Remounting the front screen

Mounting of the Safety System
Leuze electronic TMC 66 15
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
4 Mounting of the Safety System
4.1 Mounting of the Test Monitoring Unit TMC 66
The TMC 66 has been designed for mounting on a standard rail (snap-on) in a suitable
switching cabinet.
Note!
The mounting instructions in this chapter have to be heeded for fault-free functioning of the
whole safety system.
4.2 Mounting of the Single Beam Safety Light Barrier
It is absolutely mandatory that the valid guidelines and standards are observed when
mounting the single beam safety light barriers.
Safety distance
A certain time delay applies between the interruption of the light beam of the single beam
safety light barriers and the stand-still of the machine. The photo electric sensors have to
be installed in such a way that the dangerous area can not be reached within this time
delay. The minimum distance for safeguarding the hazardous area is 850 mm.
Fig. 4.2-1: Safety distance from the hazardous area

Mounting of the Safety System
16 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
Calculation of the safety distance
The safety distance S between photo electric sensor and hazardous area is calculated acc.
to EN 999 using the following formula:
Example for the calculation of the safety distance:
A machine with a system response time of 500 ms has to be equipped with a two-beam
safeguarding. The response time of the two-beam AOPD and the test monitoring unit
TMC 66 is 20 ms.
Application of the formula: S = K * T + C
Assigned is:
Result:
S = (1600 mm/s * (500 ms+20 ms)) + 850 mm
S = 1682 mm
S = K * T + C
S= Safety distance between photoelectric sensor and hazardous area
K= Grip and approach speed
T= Time delay between interruption of the light beam and stand-still of the machine
C= Safety constant
1200 mm with single-axis installation,
850 mm multi-axis installation
S= the minimum distance of the two-beam AOPD from the hazardous area
K= approach speed 1600 mm/s (EN 999)
T= sum out of system response time of the machine and response time of the AOPD
C850 mm multi-axis installation

Mounting of the Safety System
Leuze electronic TMC 66 17
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
4.2.1 Multi-axis Installation
The safeguarding heights and the number of light beams are determined in EN 999 or
through a risk analysis acc. to ISO 13849-1 for safeguarding of hazardous areas.
With multi-axis installation, parallel light beams always have to run in opposite directions.
Otherwise the light beams can cause mutual interference and disturb the safe functioning.
Depending on the number of photo electric sensor pairs, the single systems have to be
mounted in different heights acc. to EN 999. The number of used systems results from the
corresponding type C standard or risk evaluation.
Deflection mirrors
Application of deflection mirrors
A number of important factors has to be observed with application of deflection mirrors:
• With any light beam deflection, a loss of operating range occurs. Per deflection mirror,
the loss is approx. 15%.
• Contamination of the deflection mirrors should be avoided.
• Environmental conditions such as steams and dust-containing air heavily limit the
operating range.
• When installing deflection mirrors it has to be observed that the optical axis of the photo
electric sensor runs centered to the mirror.
Fig. 4.2-2: Multi-axis installation

Mounting of the Safety System
18 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
• A laser alignment aid made by Leuze, e.g. ARH 2 facilitates the alignment over great
distances and if using deflection mirrors.
Reflection bypass
Measures connected to reflection bypass
Surfaces located parallel to the light beam can cause a reflection bypass. An object within
the light path is then no longer detected.
The photo electric sensor has to be mounted with a minimum lateral distance to the
reflecting surface. This distance results from the opening angle (±4°) and the distance
between transmitter and receiver.
Fig. 4.2-3: Deflection mirrors
Fig. 4.2-4: Reflection bypass
reflecting surface
Wrong Correct

Mounting of the Safety System
Leuze electronic TMC 66 19
TNT 35/7-24V DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
4.2.2 Muting Basics
It is necessary to suppress the function of the single beam safety light barrier for a certain
period, if material has to be transported from or into the hazardous area. This suppression
procedure is called muting.
The TMC 66 has two muting preparation signals Control 1 and Control 2, as well as two
muting signals Start 1 and Start 2 for the muting function.
Note!
The TMC 66 is equipped with a direction detection to avoid manipulation. The inputs Start 1
and Start 2 have to be activated in the correct order. During the muting procedure, both
signals have to be permanently present. An interruption causes immediate abortion of the
muting function (drop-off of safety relays).
Minimum distance to the reflecting surface
To transmitter (b) in [m] 2 3 4 5 6 10
To light beam (a)
approx. [m]
0.20 0.30 0.40 0.50 0.60 1.0
Fig. 4.2-5: Muting Basics

Mounting of the Safety System
20 TMC 66 Leuze electronic
DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS
The diagram illustrates the signal flows during the muting cycle.
First, the two control signals on the TMC 66 are activated by the control unit. Note that the
control signals must originate from different signal sources. In the example above, the
Control 1 signal comes from the PLC, the Control 2 signal has to be deduced from the
pallet transport (contactor or NC drive).
For the function of the TMC 66, the connection order of the control signals is without
meaning. The time period between connection of the first and second control signal can be
between 0 ms and an infinitely long time period. Only after both signals have been
activated, the internal test of the TMC 66 starts. The control signals have to be permanently
active during the whole muting procedure.
The internal circuit and the connected muting light signals are tested during a time period of
5ms.
After a successful internal test, the connected muting sensors are tested. The TMC 66
takes over the control function. The TMC 66 "expects" a reaction on the issued signal
changes from the signals of "Start 1" and "Start 2".
At every change of a pulse edge the sensors have to respond within 240 ms. After
successful test completion of "Start 1" and "Start 2", the muting function is prepared - the
TMC 66 hands over the controlling function to the sensors.
As soon as the first muting sensor is darkened, that means signal "Start 1" switches off,
the single beam safety light barrier output signal is suppressed (muted). After a minimum
time period of 5 ms, the second photo electric muting sensor can be interrupted, that
means "Start 2" can be switched off. A maximum time period for this signal change is not
Fig. 4.2-6: Signal flows during muting
Test Start 1 and Start2
internal test
app.
5 ms
Muting
test
TMC
internal
Time dep. on resp. time of the
muting sensors, max. 960 ms selectable time
period min. 5 ms
selectable time
period
End of muting
Muting test
of the sensors
Muting
prepared Muting
active
Muting
off
selectable time pe-
riod min. 10 ms
Muting
prepa-
ration Motor
contactor
* maximum response time 240 ms