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18. Glossary
• BB bus
The BB bus is an interface which enables Bender devices to communicate with each other (Bender-internal device bus).
The BB bus can be used with an ISOMETER® and one or more EDS44…-S.
• BCOM
Protocol for communication between Bender devices via an IP-based network.
• BS bus
The Bender sensor bus is an interface which enables Bender devices to communicate with each other (RS-485 interface).
• DHCP
Dynamic Host Configuration Protocol. It is used to assign the network configuration to Clients via a server.
• EDS
Insulation fault locator for fault location in an IT system.
• EDS button
The shortcut button "EDS" manually starts the insulation fault location, which runs continuously until the button is pressed again, which stops the
process immediately.
(refer also to
“Display elements and device buttons” on page 18
• EDS mode
The insulation fault location can be carried out in three different modes. Depending on the mode, the insulation fault location starts and stops due
to different conditions (see also
• ISOnet
Only one ISOMETER® may exist in an isolated system. If several networks monitored by an ISOMETER® are coupled, this function ensures via an
Ethernet connection that only one ISOMETER® is actively measuring.
• Modbus TCP
Modbus is an international widely spread protocol for data transfer.
• PGH
PGH stands for locating current injector. The locating current injector generates a periodic locating current for insulation fault location. This locat-
ing current is detected by the measuring current transformers connected to the EDS and evaluated by the EDS.
• "PGH ON" LED
The "PGH ON" LED flashes during insulation fault location. It indicates that the locating current for the insulation fault location is generated.
• System (BCOM)
The system is the entire installation that is visible for the customer and defined by the customer. The BCOM communication takes place within this
system. Naturally, different systems can exist independently in one network.
• Subsystem (BCOM)
The subsystem structures parts of the system as units defined by the customer, e.g. all PQ devices. A typical subsystem are also "non BCOM-capa-
ble" devices that are hidden behind a proxy.
• Web server
A web server presents the device functions graphically. The web server can be used for reading out measured values and for parameter setting.