New gateways and expansion modules for the MBS system
Integrate command devices into Industrial Ethernet
For its modular bus system (MBS), which Georg Schlegel uses to connect its control and signaling devices to industrial communication systems, the company is presenting four gateways and two expansion modules whose RFID interface can be used to control access rights for machines, for example.
The MBS is a proprietary bus system for operating devices with several control and signaling devices. It can be used independently of the higher-level communication system used and can be integrated into various communication systems such as fieldbuses and industrial Ethernet systems. New for the MBS are four gateways and two extension modules that combine several functions in one device. The gateways for Profinet (PN_GW_HS_01), EtherNet/IP (EN_GW_HS_01), EtherCAT (EC_GW_HS_01) or Powerlink (PL_GW_HS_01) have an interface to the MBS system, which enables easy integration of command devices into the network and their control. Other control devices such as a potentiometer or an RFID reader can be operated via the integrated A/D converter or the integrated RFID controller.
The two MBS extension modules E_BTK8IO_STCA_HS and E_BTK8IO_TTCA_HS also have an RFID controller, connections for an RFID reader and the matching illuminated transponder holder. The two modules differ in the type of RFID control. With the TMS system (TTCA), which is also installed in the gateways, the transponders are programmed via the TMS software on the PC. Users can therefore design the content of the transponders according to their own wishes. The SKS system (STCA), on the other hand, has predefined transponders. It is therefore not as flexible, but is quicker and easier to install.
In addition to an integrated signal transmitter with a volume of 105 dB, the expansion modules also offer six power outputs (24 V / 1 A) for operating powerful devices such as industrial lamps. Two further PNP outputs can be used to control a status display, for example.
A practical example to illustrate this: Six production stages are implemented on a machine, which must be operated independently of each other. Each stage must only be accessible to authorized personnel. In this example, the command devices are integrated into the network via the MBS with the Profinet base module and the extension module with RFID interface. Data processing takes place via Profinet.
Thanks to the network technology, the base module can be used to control up to eight control devices on the machine. Machine access is controlled via the expansion module's RFID technology, as access rights can be assigned for each individual step by programming the transponders. Access remains blocked until the authorized employee authenticates himself with his transponder. To do this, it is sufficient to snap the tag into the holder of the RFID reader. If authentication is correct, the machine is released for operation; when the transponder is removed, the machine is locked again. A signal lamp connected to the power outputs of the extension module indicates the status of the machine.
In terms of predictive maintenance, Schlegel has also included an IO-Link gateway in the range. The gateway can be connected directly to a free port of the IO master. The basic features and functions are identical to those of the Ethernet gateways, but the additional error byte ensures active monitoring of the process data. For example, it is possible to detect whether an LED has failed or the switching cycle has been exceeded. This information is stored bit-coded in the error byte and sent to the higher-level controller for evaluation.
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