5/12/2017
TECH-538/D.W.O. 23160
Page 32 of 189
It’s possible to connect a power supply (9V to 32 V) directly in these two pins for local
calibration purposes; HOWEVER, the communication WILL NOT work. To enable the
communications, the user will need to install an impedance coupler between the power
supply and the network.
Make sure that the electrical installation of the remaining parts of the network also
complies with FF specifications. For more information refer to
•
FOUNDATION Fieldbus: Application Guide AG-140: “31.25 Kbit/s Wiring and
Installation”
Figure 4-3 – Example of ICoT 6400 Foundation Fieldbus network topology
Power
Supply
Impedance
Coupler
Comm.
Interface
Junction Box
/Spur
Junction Box
/Spur
Junction Box
/Spur
Bus Terminator
Additional
FF Device