EUCHNER RPS User Manual
Operating Instructions for Rope Pull Switches
RPS...
Safety rope pull switch RPS
Correct use
In accordance with EN 60947-5-5, EN ISO 13850, it must be ensured that parts of or complete industrial
machines or installations can be stopped as quickly as possible by generation of an emergency stop signal.
The purpose of these regulations is to prevent any danger for persons or damage to machines.
The following applicable standards must be taken into account for this purpose:
Regulations on installation and operation: EN ISO 13849-1 Safety of machinery. Safety related parts of
control systems
Risk assessment on the machine: EN ISO 12100, Safety of machinery – Basic concepts –
General principles for design – Risk assessment and risk
reduction.
The safety rope pull switches of the series RPS have been designed and tested in accordance with the
standards EN 60947-5-5 and EN ISO 13850. They must be used only in control circuits.
Safety rope pull switches are used on the accessible sides of conveyor systems or machines. In contrast to
emergency stop switches (e.g. mushroom-head pushbuttons) located at certain intervals that allow the
emergency stop signal to be generated only at the devices themselves, rope pull switches allow signal
generation at any point along the rope length.
The safety rope pull switches of the type RPS are intended for use only in closed areas.
Design
The safety rope pull switches of the type RPS consist of a polyamide housing, those of the type RPS-M of a
die-cast aluminum housing. They achieve the specified degree of protection IP67 if the cover is properly closed
and if a cable gland is used that offers at least equivalent protection. The RPS has three cable entries M20x1.5.
The switches comply with the international requirements according to EN 60947-5-5 and EN ISO 13850, i.e.
after actuation or a rope tear, the emergency stop switch latches automatically, and the switch can then be
reset to its initial state only by means of the resetting device on the switch.
Depending on the switch version, it is possible to achieve a rope length of 75 m. It must be taken into account
here that the friction in the overall system can become so high due to the rope guides that this makes it difficult
or impossible to reset the system (see section Installation).
This can be avoided by choosing different system components.
The user is responsible for ensuring that the system functions properly.
Operating Instructions for Rope Pull Switches
RPS...
Function
The system consists of the switching device, a red pull rope, supports and a counterspring.
The pull device of the rope pull switch is connected with a pull rope. The emergency stop function can be
tripped by pulling this rope. Since the rope pull system is pretensioned by an integrated spring, switch latching
and the emergency stop function are tripped immediately if the rope tears. The safety contacts remain latched
after tripping. After the hazardous situation has been remedied and after examination of the entire pull rope
length, the system may be reset to operationally ready state again by manual operation of the reset button.
System operating
position
Triggering/
latching
Rope tear
“RESET”
by the operator
“STOP” triggering
by operator/
automatic latching
“STOP” triggering
automatic
latching automatic
RPS...S
The RPS...SC... switch types have an integrated red emergency stop slam button that
can be actuated by pressing it if a hazardous situation occurs. Analogously to operation
of the pull rope, the safety contacts are then opened and the switch is latched. After
rectification of the hazardous situation, the system can be reset manually to operationally
ready state by turning the actuating cylinder 90° in clockwise direction.
Please also refer to item 3 of the section Installation sequence!
RPS...P
After remedying the dangerous situation and with the rope system tensioned, the rope pull switch
can be unlocked and so made operational again by turning the Reset knob.
Pre-failure monitoring (optional)
The safety rope pull switches of the type RPS-M-E-…have a remote display for monitoring the rope tension. It
uses an integrated sensor unit to monitor the permissible rope tension for being exceeded and impending
triggering of the safety rope pull switch.
Required maintenance/adjustment is signaled via an electronic output in good time before unintentional
machine standstills occur. Optionally available signal lamps can also be connected to this output; refer to the
section “Accessories”. This meets the requirements for “preventive maintenance”.
Safety precautions
All system components must be mounted on surfaces that can reliably withstand all the forces that may
occur.
Routing of the rope as straight as possible results in low frictional forces in the system. From a rope length
of 25 m, only rope pulley blocks may be used as rope supports.
Rope pulley blocks and other accessories are optionally available.
Positioning of the support points at irregular intervals prevents rope oscillations that might cause false
tripping.
The red pull rope must have sufficient space between the support points to ensure that secure gripping and
tripping are possible. To improve visibility, marking flags can be attached to the pull rope along its length;
however, these must not interfere with tripping of the emergency stop function!
When a pull rope section is being set up and planned, it is necessary to take into account and comply with
the applicable regulations, as well as the maximum permitted actuating travel of S= 400 mm and maximum
tripping force of F=200 N applied perpendicularly to the rope.
Suitable guide rollers must be used for rope routing at angles.
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Operating Instructions for Rope Pull
Switches RPS...
Improper installation or manipulation of the rope pull switch will lead to loss of the personal protection
function and can cause serious or fatal injuries.
Safety rope pull switches must not be bypassed (bridging of contacts), turned away, removed or otherwise
rendered ineffective.
The switching procedure may be triggered only by a pretensioned rope system when it is pulled or the rope
is severed.
If damage or wear is found, the complete switch must be replaced. Replacement of individual parts or
assemblies is not permitted!
Identification of the safety pull rope switch
Identification by designation
RPS-M-E-3131-SC-300M...
RPS safety rope pull switch (switch series)
- without
E pre-failure monitoring
- plastic housing
M metal housing
3131 switching function depends on the type used (standard 3131); see section
Switching elements
R with ring
C quick fastener and fast-action tensioning device
P without emergency stop pushbutton, reset by pull knob
S emergency stop pushbutton, reset by rotary actuating cylinder
e.g. 300 N max. spring force to tension the rope
Identification by item number
The item number of the switch is located beneath the switch designation on the switch label. Please state this
number in correspondence and orders to EUCHNER GmbH & Co. KG.
RPS3131SC300M
088884
...
...
...
3
Operating Instructions for Rope Pull Switches
RPS...
Dimensions
RPS...PR... RPS...PC...
RPS...SC... RPS-M...SC...
All dimensions in millimeters
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Operating Instructions for Rope Pull
Switches RPS...
Mounting
Note
Under ideal installation conditions it is possible to achieve a maximum rope tension length of 75 m.
Depending on the actual situation, there may be increased friction in the system. This friction may be so high
that automatic resetting is no longer possible as described above. However, tripping in the event of a rope tear
must be guaranteed in all cases.
The amount of friction depends on:
- Number of eyebolts used
- Number of contact angles and deflections
- Number and size of guide rollers
- Alignment of rollers and eyebolts with respect to each other.
The friction can be reduced by using guide rollers with a larger diameter. The system should be divided up if
there is too much friction. The user is responsible for component selection and correct functioning of the
system.
Example of proper installation
Example of improper installation
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