Schmersal rope pull switches from Germany are safety components designed for long-distance conveyor systems and large production lines, complying with emergency stop standards EN 60947-5-5 and EN ISO 13850. The portfolio includes general signal-type TQ series and latching emergency-stop ZQ / RS series. Internal contacts are actuated by tension on wire ropes. Operators can trigger emergency shutdown anywhere along the rope. Once activated, the switch stays latched and requires manual reset before equipment restart. Premium models integrate rope break monitoring, which sends alarm signals automatically if the wire rope snaps, eliminating hidden safety risks. These switches are widely adopted for personnel protection along extended production lines.
Schmersal rope pull switches cover compact, standard, heavy-duty metal-housing and explosion-proof variants. Below are 20 commonly used models:
RS655-Z22-G
RS655-Z22-DS
RS656-Z22-G024
EX-RS655-Z22-DN (Explosion-proof)
TQ900-02
TQ700-02
TQ700S-01
TQ215-02
TQ315-11
ZQ215-02
ZQ315-11
ZQ700-02
TQ441-01
RS655-Z11-G
TQ900-11
ZQ215-11-ST
EX-I-RS655-Z22
TQ215-12ZK
RS656-Z11-G
ZQ315-02-M20
Rope pull switches are ideal for linear equipment across multiple industries: mining belt conveyor systems, port bulk material handling equipment, metallurgical raw material transport lines, coal conveying systems in thermal power plants, waste recycling production lines, large packaging lines, wood processing conveyor equipment, cement manufacturing lines, automated logistics conveying systems, chemical material conveyors, auxiliary conveying equipment for tunnelling machines, paper production lines, continuous rubber & plastic extrusion lines, grain transportation machinery and construction machinery conveying systems. When inspectors encounter hazards anywhere along the route, pulling the wire rope triggers immediate machine stop, overcoming the limitation of fixed-position emergency stop buttons.
Compared with conventional emergency stop pushbuttons and ordinary limit switches, Schmersal rope pull switches feature five core advantages:
First, full-range protection over extended distances. Single-side installation supports up to 50 m rope length, while bidirectional versions reach 2 × 100 m. Emergency stop can be activated anywhere along the entire route, eliminating blind spots for long-distance belt conveyors.
Second, built-in latching mechanism meeting safety standards. Emergency-stop ZQ and RS models lock automatically after triggering and cannot reset without manual intervention, fully compliant with machinery safety regulations. Premium versions provide rope break detection to raise alarms if the wire rope becomes slack or fractured, preventing undetected safety circuit failures.
Third, diversified housing options and excellent environmental resistance. Compact variants use high-performance thermoplastic housings, while heavy-duty versions adopt die-cast metal construction. Standard units achieve IP66/IP67 protection class with wide operating temperature ranges. ATEX-certified explosion-proof switches are available for hazardous zones with dust and flammable media, resisting dust, mud, rainwater and mechanical impact.
Fourth, interference-free passive mechanical structure with stable performance. Contact operation relies purely on mechanical movement and remains unaffected by electromagnetic interference, suitable for environments with inverters and high-power machinery. Multiple contact combinations (NO+NC) are available to connect safety circuits and fault alarm signals simultaneously. Screw terminals and M20 cable entries simplify wiring work.
Fifth, standardized design and convenient maintenance. Visible status indicators enable quick on-site diagnosis of activation status. Anti-twist pull lugs prevent mechanical jamming during long-term operation. Full-range CE, cULus certifications support machinery export. A complete accessory portfolio including wire ropes, tensioners and support rings is available for matching installation.
For belt conveyors and long production lines, fixed-point emergency stop buttons cannot cover the entire route and create significant safety risks. Thanks to continuous line-side triggering, rope break monitoring and mandatory latching reset, Schmersal rope pull switches become standard safety components for long-distance conveying equipment. From light automated production lines to heavy-duty mining and port conveying systems, the TQ, ZQ and RS series deliver reliable emergency stop protection and build comprehensive human-machine safety barriers worldwide.
Related Pull Wire / Rope Switches
Browse the complete Schmersal Pull Wire / Rope Switches range. Representative models available through Glorient:
Rope-pull e-stop switches feed safety circuits at up to PL e. For the framework behind these levels, read SIL vs PL Explained: Performance Levels, Safety Categories and Component Selection.
Frequently Asked Questions
When should I use a rope pull switch instead of an emergency-stop button?
Rope pull switches protect long conveyor lines, material-handling systems and other long-distance machinery where operators cannot reach a fixed e-stop button. The rope spans the entire length, so an emergency stop can be triggered from any point along the machine.
What is the difference between the RS and TQ/ZQ series?
The RS series are the classic heavy-duty rope pull switches; the TQ and ZQ series are compact and standard variants with different actuation mechanisms and housing options to suit different installation requirements.
How does rope tension affect the switch operation?
The switch trips on both rope pull and rope slack or breakage, so it continuously monitors rope integrity. Correct tensioning and the use of tensioning springs are essential for reliable operation and to avoid nuisance trips.