Interfaces; Connecting A Pw20I Load Cell To A Computer Via An Rs-232 Interface - HBM PW20i Kurzanleitung

PW20i
5

Interfaces

PW20i load cells are delivered as required with an RS-232, RS-485,
CANopen or DeviceNet interface. The ground reference for all interface
signals is based on the power supply ground of the PW20i load cell (GND1).
5.1 Connecting a PW20i load cell to a computer via an
RS-232 interface
Pin assignment
for PC (RS-232)
Device socket 25 pin Device socket 9 pin
(solder side) (solder side)
1
14
2
TxD
6
3
RxD
9
7 GND
Ground/
Housing
25
13
The RS-232 interface is suitable for a point to point connection (one PW20i
load cell to one interface). Only the signals RxD (Receive Data), TxD
(Transmit Data) and GND1 are required.
For communication with an external device, the TxD line must be connected
to the RxD of the PW20i and vice versa.
A1243-2.0 en/de/fr/es
Power pack
Ground/
−
Enc.
1
RxD
2
TxD
3
GND
5
Shielding
+
red
blue
gray
white
7
PW20i
RS 232
+12...+30V
TxD
RxD
GND
HBM