Open, modular and extremely flexible:
BL20 is a panel-mounted bus I/O system where the user decides
the bus system interface, the I/O layout, type and quantity of
inputs and outputs to suit their specific requirements. Interface
gateways are also available to communicate with Profibus-DP, DeviceNet,
and CAN open. Diagnostic
data is transferred to the higher level control-system.
Signal I/O in any order:
I/O modules can be combined in any order to suit your
application, whether analogue or digital, irrespective of the
fieldbus used. So the I/O layout suits your preference. You can have
your I/O on a machine-by-machine basis mixing the I/O the way you
want, or say keeping digital signal together etc., whatever you
like. You only have to buy the exact number of channels you want,
making BL a really cost- effective solution.
Power Supply Modules can also be laid
out in any order.
Gateways are the link between the fieldbus system and the I/O
modules. They control the entire data communication. The BL20 I/O
system provides gateways for all major field-buses.
The modules communicate with the gateway via an internal bus.
Based on this concept, the system is open to future bus
Each BL20 station consists of a gateway and set of base-terminal
modules. The base modules are simply clipped onto DIN rail and the
I/O etc modules are clipped onto the base modules without the use of
tools. Base and electronics modules are mechanically coded and so
are simple and safe to allocate. The system is designed for mounting
within a control panel. For field-mounted I/O systems see
BL67 I/O System.