Modular system
PCD0
26/766 E2
(HB_PCD0 26 766_E2.DOC)
SAIA-Burgess Controls Ltd.
Page 27
3
Modular system
Bus couplers for PROFIBUS-DP
The RIO module system uses bus couplers to establish the connection between the I/O modules of a
bus node and the field bus.
EC economy bus coupler
Economy version of the BC bus coupler
BC bus coupler
EC
BC
Diagnosis LEDs
+
++
Diagnosis functions
+
++
Keyboard / display
for on-site service and diagnosis
++
Field bus port
+
+
Features of the EC economy bus coupler and the BC bus coupler.
The EC economy bus coupler (EC=Economy) is the base version of
the RIO bus coupler. The bus coupler provides ports for the field bus
cable, the power supply and LED displays for diagnosing the
operating status of the bus node.
In addition to these features the BC bus coupler provides extended
service and diagnosis capabilities which can be used on-site via the
integrated keypad and the four-digit display.
The BC bus coupler provides the operator with valuable help when
diagnosing and commissioning plant parts and machine assemblies
before they are connected to the field bus and the PLC.
The bus coupler are interchangeable. Only if bus couplers are used
for PROFIBUS-DP the master project must be changed using the
respective device root file (GSD).
