Pull Cord Switches for Industrial Overhead Doors
An emergency stop that always has to be within reach
At an overhead door, a roller shutter or a conveyor system in a warehouse, there's always a moment when someone needs to be able to stop or activate the movement immediately, regardless of exactly where they're standing along the door. A single fixed push button doesn't cut it: someone standing at the far end of a wide door, hands full or manoeuvring a pallet truck, doesn't have time to walk to the button.
The story of a warehouse with too many near misses
Picture an operations manager at a distribution centre where overhead doors open and close all day for trucks and internal transport flows. During the latest safety review, it becomes clear that staff have repeatedly struggled to reach the stop button in time during a malfunction, simply because the button sits in one fixed spot and the incident happened elsewhere along the door. None of the cases resulted in an accident, but the safety officer doesn't want this pattern to continue until one does.
The solution needed here has to be reachable across the full width of the door, without requiring an expensive change to the control system. That's exactly where a pull cord switch proves its value: a cord running the full length of the door or conveyor line, where a pull at any point activates the function.
CI-WPS1 and CI-SCP1: two mounting variants for the same principle
Secumatic CI-WPS1 and CI-SCP1 are industrial pull cord switches built specifically for overhead doors, roller shutters and conveyor systems. The principle is simple, and reliable because of it: a pull cord under light tension, connected to a switching mechanism that responds as soon as the cord is pulled or broken, which also makes it suitable as an emergency stop for conveyor belts. The two variants differ in mounting style, so the choice depends on the physical layout: a freely hanging cord along a door opening, or a mount that fits better with a fixed conveyor line.
Why simplicity is an advantage here, not a limitation
In an industrial environment with dust, vibration and temperature swings, a mechanically simple system is often more reliable than an electronic solution with more moving parts that can fail. A pull cord switch needs no calibration, has no sensor that can get contaminated, and is visually obvious to anyone on the floor as a safety device. For installers, that means a component with low failure sensitivity and an installation process well suited to repetition across multiple identical doors within the same warehouse.
What this means for installation
Mounting calls for a careful assessment of cord length and tension, so the system responds sensitively enough without triggering unintentionally from normal vibration of the door itself. For installers fitting the same safety device to multiple overhead doors within one facility, that process becomes quickly repeatable after the first installation: the same configuration, adjusted to each door's specific width.
Part of a broader safety plan
A pull cord switch rarely stands alone in an industrial environment. Combined with control stations for everyday operation and vandal-resistant push buttons in areas with heavier use, it forms a complete set of operating and safety provisions around an overhead door, tailored to both daily use and emergency situations.
Secumatic supplies the CI-WPS1 and CI-SCP1 pull cord switches as Camden's European distributor, with support on specification and project advice for installers and technical service providers. View the CI-WPS1 and CI-SCP1 industrial pull cord switches, or get in touch for advice on the right configuration for your project.
