16
PW20i
HBM
A1269-2.0 en/de/fr
CANopen and DeviceNet interface
Terminal / color code
CANopen /
DeviceNet
1 red
Voltage
+12...30 V
2 white
Ground
GND
3 blue
CAN_Bus_Out
CAN_H_Out
4 green
CAN_Bus_In
CAN_H_IN
5 black
CAN_Bus_Out
CAN_L_Out
6 gray
CAN_Bus_Out
CAN_H_Out
7 yellow
Control input
TRG
8 unassigned
−−
−−
RS-485 interface
Terminal / color code
RS-485
1 red
Voltage
+12...30 V
2 white
Ground
GND
3 blue
Transmitter
TA
4 green
Receiver
RA
5 black
Transmitter
TB
6 gray
Receiver
RB
7 yellow
Control input
TRG
8 unassigned
−−
−−
NOTE:
•
The PW20i-load cell enclosure is connected to the cable shield. To obtain
an EMC-compliant connection (EMC = electromagnetic compatibility), the
shield at the cable end must be connected to the enclosure of the connected
device or the earth potential. The shield must be connected directly and with
low impedance (e.g. with EMC-compliant PG bushings).
•
Use shielded, low-capacitance cables only for all connections (interfaces,
power supply and additional devices) − (the HBM measurement cables
meet these requirements).
•
Electrical and magnetic fields often induce interference voltages in the
measurement electronics. Do not route the measurement cables parallel to
power lines and control circuits. If this is not possible, protect the
measurement cable (with steel conduit for example). Avoid stray fields from
transformers, motors and contact switches.
•
Should it be necessary, a separate cable can be used to establish potential
equalization between the PW20i and the (PC/PLC) master (earthing
concept). Cable shielding must not be used for this potential equalization.
