The repair and maintenance of industrial field equipment is inevitable, and the most embarrassing thing for field personnel is that the equipment is started while the person is still in the danger area. In this scenario, personnel are highly vulnerable to serious injuries from moving parts, harmful gases, harmful rays, and high temperatures. The tagout lockout mechanism can effectively prevent this embarrassment, but the traditional mechanical locks are usually larger and heavier, and it is a burden for the on-site personnel to carry around, and the selection of the appropriate mechanical door switch for the tagout lockout mechanism also requires a lot of additional workload and component costs.
There is also an extreme situation where the danger zone is large and the on-site personnel could have left the danger zone through the nearest security door, but had to go back the way they came, due to the implementation of the tagout lockout......
How to break the game? Is there a technology or product that can achieve the premise of ensuring safety requirements, which can not only make the size of the key/lock smaller but also have no special requirements for the selection of safety door switches, and the on-site personnel can choose the optimal departure path according to the actual situation.
The answer is yes! Key in Pocket technology from PILZ makes it all possible.
Demystifying the "Key in Pocket" technology
The implementation of Key in Pocket technology requires two parts: hardware and software. The hardware consists of a PITreader access reader and a security controller – PNOZ m B1 or PSS 4000; The software section consists of the "Key-in-Pocket", "Blind Spot" and "Delete Sign in List" software blocks in the PNOZmulti Configurator or PAS4000 software tools.
As shown in the figure, the PITgate Box unit with integrated PITreader and operation buttons can be selected as the safety door operation box, and the two custom buttons on the PITgate Box are used to lock/unlock the safety gate switch and the personnel to check in and out, respectively. The PITreader on the PITgate Box is responsible for reading the rights and IDs of the electronic keys, which are transmitted to PNOZ m B1 or PSS 4000 via the Ethernet interface. By calling up the relevant software function blocks in the PNOZmulti Configurator or PAS4000 in the PNOZ m B1 or PSS 4000 software tool, it is possible to determine whether the current electronic key can lock/unlock the safety door and to check in and out the personnel information. Devices in the danger zone can only be restarted when all check-in personnel in the registration form have checked out.
The simple check-in process is as follows:
The simple checkout process is as follows:
If there are multiple safety doors in the field environment, personnel can check in from different safety doors to enter the hazardous area for work, and then check out from the nearest safety door to leave the hazardous area, so as to improve the efficiency of the work path of the field personnel. Several PITgate Boxes on site can be connected to the same PNOZ m B1 or PSS 4000 and share a single personnel registration form. If the blind spot check operation needs to be performed on site, then a separate PITreader permission reading device can be installed at a special location on the site, and the last 1 person who leaves the danger zone can operate this PITreader to confirm that there is no person at the blind spot position, and then leave the danger zone, and the equipment can be restarted.
Measuring 42mm*15.1mm*8mm and weighing 10 grams, the PITreader's electronic key is designed to be compact and compact, and its passive RFID technology ensures that the information stored on the key can be read by the PITreader device without the need for battery power.
Written in the last words
The technology of Key in Pocket can not only improve the safety of work, but also optimize the work process, improve work efficiency, and bring convenience to the work of on-site personnel.
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