Digital Weighing Indicator
SI 4100
G
TG\WGTG
6-6. Serial Interface (option 04 : RS-232C/422/485)
RS-422/485 serial interface is more stable for electric noise effect compare with other communication method,
using electric current difference.
But, install isolated place from Power cable or other electric cables and wires, and please use shielded cable for
better performance.
Recommendable communication distance is about 1.2km.
If you install additional RS-232C interface, please refer “6-1. Serial Interface” section.
6-6-1. Signal Format
ཛ
. Type : RS-422/485
ཛྷ
. Format : Baud Rate : Refer “F-function 31”.
Data Bit : 7 or 8(No Parity)
Stop : 1
Parity Bit : Even, Odd, No Parity (Selectable)
Code : ASCII (STX 02H, ETX 03H, CR 0DH, LF 0AH)
1
LSB
0
1 2 3 4 5
MSB
6
0
6-6-2. Data Format
Same as RS-232C (Refer “6-1. Serial Interface”)
6-6-3. RS-485 Circuit (In case of RS-485, only Use No6 and 7 pin)
D-SUB 9 pin
In case of RS -232 : “6-1. Refer to Serial Interface ”
In case of RS-485 : only Use No6 and 7 pin
Terminal Block
GG
G
Terminal Block
1
2
3
4
RS-232 TX
RX GND GND
RS-485 RTX+ RTX-
NC
NC
RS-422 RXD+ RXD- TXD+ TXD-
Start 1 Bit
Data Bit
Parity Bit
Stop 1 Bit
1.5V Electric
Potential Difference
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