Interfaces; Connection Of Several Load Cells To A Pc Via Rs - HBM FIT7A Bedienungsanleitung

Interfaces

6 Interfaces
Line termination
+5 V
500 Ω
500 Ω
+5 V
500 Ω
500 Ω
TB
T
TxD on/off RxD
PC = Master
18
The load cell can be provided with an RS‐485 interface, a
CANopen interface, or a DeviceNet interface, as
required. The reference potential of all the interface
signals is GND (supply ground) of device socket 1.
6.1 Connection of several load cells to a
PC via RS-485
TB
TA
RB
RA
TA RB RA TB
T
R
TxD on/off RxD
FIT7A_1 = Slave 01
Fig. 6.1
Up to 89 load cells can be connected via the RS‐485
interface to a common bus line, the total length of which
A3924-1.1 HBM: public
TA RB RA
...
R
Bus connection via RS‐485
Line termination
500 Ω
500 Ω
500 Ω
500 Ω
TB TA RB RA
T
R
TxD on/off RxD
FIT7A_89 = Slave 89
+5 V
+5 V
®
FIT 7A