Rockwell Automation 440R MSR41 Safety Module User Manual - Manual (Page 6)

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MSR41 Safety Module User Manual
Original instructions
Explanation of the terminology
The maximum response time for the MSR41 base module t(C) are given
in chapter 14.
Installation
For the professional installation and connection, please consult the
relevant laws and regulations. The safety officer of the manufacturing
facilities, the local authorities (OSHA in USA, HSE in GB).
The requirements of the safety regulations of electrical engineering, the
local employer’s liability insurance association and the international
standard IEC 60204 are to be taken into full consideration.
Mounting location
The MSR41 modules must be mounted in a control cabinet which is
sealed to at least IP54. The units must be snapped onto a 35 mm
mounting rail, which is grounded. If it is used outside of a control cabinet
a housing with a protection category of IP54 and a mounting rail
capability is recommend.
Cable and wires
The wires from the MSR41 base module must be securely separated and
guided away from the wires of the relay section (MSR45E expansion
modules).
Supply voltage
To safeguard the controller, the +24 V terminal should be protected with
an external 5 A fuse. The controller and the machine should be offline
before beginning the installation.
The supply voltage must conform to the requirements of EN 60204-1, it
must bridge a 20 ms interruption of the supply network. When
considering the supply voltage, it must be one of the following: SELV
(Safety-Extra-Low-Voltage) or PELV (Protective-Extra-Low-Voltage) in
accordance with IEC 364-4-41.
Earth connection
The earth of each MSR4x module is realized through the connection to
the mounting rail. Consequently it is important to ensure, that the
mounting rail has a good earth connection.
Micro400 light curtain
The two RJ45 sockets on the lower portion of the base module are for
the connection of Allen-Bradley GuardShield Micro400 (white = E =
emitter; blue = R = receiver). To protect the RJ45 connectors the cables
have to be snapped into the provided cable holders.
Start mode
The following start modes are supported by the MSR41:
• automatic start or
• manual start
Manual start
Depressing the start button will cause the two safety OSSD outputs to
change from low to high and if connected the MSR45E relay expander
modules will close (= manual start).
Automatic start
If the MSR41 is connected for “automatic start”, then, after the activation
and the deactivation of the GuardShield Micro 400, the two OSSD
outputs will change automatically from low to high again and if
connected the MSR45E expander relay contacts will automatically
reclose.
Output monitoring
Often a MSR41 module is connected to external relays. Reasons to do
this might be: The relays of the extension modules do not have enough
contacts or if the required switching capacity is more than the specified
capacity. These external relays can be connected:
a) to the two safety PNP outputs (OSSD) of the base module (e.g.
Figure 4)
and / or
b) to the contacts of an expander module, e.g. if the power of the two
OSSD outputs is not adequate.
In any case when using external relays the function of these external relays
must be monitored. For category 4 application, two external contactors,
each with force guided contacts must be inserted. For monitoring the
Symbol Meaning
t(C) Response time for the MSR41 base module (evaluation time)
t(LC) Response time of the light curtain on the label of the light curtain)
t(em) Response time for the MSR45E expander module
t(totLCOSSD) Maximum OSSD response time triggered by the light curtain
t(totLCEXT) Maximum relay extension module response time for the light curtain
The start function is not monitored (no
edge detection). Further additional
measures must be done to fulfill the
requirements of a manual monitored
reset according to the saftey standards
(e.g. use of an additional MSR127 safety
relay).
It is fundamental that the start button be
mounted so that the danger area is clearly
visible. That is, when pressing the start
button it must be guaranteed that no one
is detained within the danger area.
According to EN 60204 article 9.2.4.4.2 a
system may not automatically restart,
even after the cause of the shutdown has
been eliminated and thereby another
danger may still exist to the operator. If
the MSR41 base module is configured
with an “automatic start”, this
requirement must be fulfilled by further
measures.