turck BL67-GW-PN-AC, User Manual, Page: 12 / 119

BL67 philosophy
D301239 1013 - BL67 AIDA PROFINET 2-2
2.1 The basic concept
BL67 is a modular I/O system of protection class IP67 for use in industrial automation. It connects the
sensors and actuators in the field with the higher-level master.
BL67 offers modules for practically all applications:
• Digital input and output modules
• Analog input and output modules
• Technology modules (SSI interface, RS232 interface,...)
A complete BL67 station counts as one station on the bus and therefore occupies one fieldbus address
in any given fieldbus structure.
A BL67 station consists of a gateway, power distribution modules and I/O modules.
The connection to the relevant fieldbus is made via the bus-specific gateway, which is responsible for
the communication between the BL67 station and the other fieldbus stations.
The communication within the BL67 station between the gateway and the individual BL67 modules is
regulated via an internal module bus.
Note
The gateway is the only fieldbus-dependent module on a BL67 station. All other BL67
modules are not dependent on the fieldbus used.