System Description RIO / microLine

RIO Bus Couplers
The bus coupler connects the expansion modules to
Profibus-DP, Interbus, DeviceNet and CANopen field buses.
• 8 RIO I/O modules can be connected in any combination
(digital, analog, function modules)
• Up to 128 digital or 56 analog I/Os can be connected
locally
• Field bus diagnosis via LEDs
• BC series (figure left) with display, keypad and integrated
commissioning and diagnosis functions
• EC series (figure right) as low-cost economy version
without the special BC features
The bus coupler has an internal 5 V power packs to supply
voltage to the connected expansion modules up to total
output of 5 W. Voltage and internal bus are connected by
slide contacts on the modules.
Parameterizing and Diagnosis Functions
The PLC can initiate diagnosis functions in the bus coupler.
A function code – with parameters if required – is transmitted
to the bus coupler. The bus coupler executes the functions,
compounds the diagnostic data (if required) and provides
the data to the PLC. There the data can be evaluated and
processed in the user program.
Service Functions
BC bus couplers give you the option to carry out service
functions via the integrated keypad and the display. For
example setting the data transmission rate, displaying the
process data width of outputs and setting/deleting the user
lockout, with password if required.
During operation you can use the cursor keys to select any
channel. The bus coupler display then shows the current
high/low state (of a digital channel) or the current voltage
or current value (of an analog channel).
Error messages are output as digital code on the BC bus
coupler display and flashing code on the RUN LED of the
EC bus coupler.
System Description RIO / microLine 19