3500/60-01-00 Contact type is very different
To make the mechanical switch with locking function fully play its function, you must first understand the contact of the mechanical switch. Have you found that mechanical switches with locking functions generally provide two kinds of contacts? One is the contact associated with the status of the switch latch (Interlock status), which acts when the latch is inserted into the switch. The other is the guard lock status, which is associated with the lock state of the switch. The lock coil can only be activated when the latch is inserted into the switch.
So what kind of contacts are usually used in the design of safety circuits?
The guard lock status contact must be used in most cases, because the closed and l3500/60-01-00 ocked state of the security door is the security state in most scenarios. Do not use 1 pair of Interlock status contacts +1 pair of guard lock status contacts; otherwise, the security input loop is likely to be out of sync.
The equipment usually has a variety of working modes, some of which are specifically for equipment debugging and parameter adjustment, such as manual mode, electric mode, low speed mode, etc. In these modes, the operation speed of the equipment is relatively slow, and the corresponding mechanical safety protection measures will be reduced.
Taking a welding robot working unit as an example, in the debugging mode, the robot is operated manually at a low speed. At this time, in order to facilitate the debugging personnel to adjust the position and Angle of the workpiece and fixture, and to protect the personnel, the safety door must be closed but not locked. At this time, we need to use the characteristics of the Interlock status contact to monitor whether the security door is closed, and of course, the running speed of the device in this mode is also to be monitored for security. In automatic mode, the operation speed of the equip3500/60-01-00 ment is fast, and the safety door must be closed and locked before the equipment can run. At this time, we need to use the guard lock status contact to monitor the status of the safety door.
