EUCHNER RPS - Manual (Page 2)

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 “RESET”
by the operator
Triggering/
latching
“STOP” triggering
by operator/
automatic latching
Rope tear “STOP” triggering
automatic
latching automatic
2
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.