Euchner ZSA 系列 IP67 安全启动开关 070736, 3 位置, 2 常开/1 常闭 触点

Enabling Switch

Enabling switches are hand-operated control mechanisms designed for use in hazardous areas of machines and equipment.
In "manual" operating mode, the protective functions of moveable protective devices are overridden under certain conditions. The enabling switch allows authorised personnel to enter danger areas in order to perform programming, set-up, monitoring, maintenance, test and service work.
The patented cables of the enabling switch have shielded single cores, permitting cross-circuit monitoring. The shields are to be connected with the safety earth conductor system of the machine or installation. This enables cross circuits to be identified, for example, during pinching of cables and the controller is immediately turned off through activation of the short-circuit protection. This dispenses with the need for an additional evaluation device for cable monitoring.

Outstanding ergonomics
Low weight
Problem-free gripping during manual changes
Lighter and more stabile pressure point
Secure cable monitoring during cross circuit
Difficult to tamper with

Three-step enabling switches have the following function sequence

Step 1: OFF function (operating element not pressed)
Step 2: Enabling function (operating element pushed to middle setting)
Step 3: O function with forced opening (operating element pushed completely past the middle
setting)