FT-111(D) Panel Weighing Indicator, Technical Manual, Rev.1.0.0, May 2019
Page
22
of
146
RS232C Serial Port
FT-111 weighing indicator has RS232C serial port which is galvanically isolated from other circuitry to increase
the EMC immunity. The usage of this serial port and its specifications are described in the Table 4-3 and its pin
configuration is shown in Table 4-4.
Usage
Interfacing with printer, PC, PLC, remote display etc.
Data formats
Continuous, Fast Continuous, Printer, BSI Protocol or Modbus RTU
Baud rate
1200 / 2400 / 4800 / 9600 (Default) / 19200 / 38400 / 57600 bps
Length
7 or 8 (default) bits
Parity
Even, Odd or No (default)
Start / Stop bits
1 start bit and 1 stop bit
Table 4-3 - RS 232C Serial Interface Specifications
Definition
RS232C
Pin number
TXD
1
RXD
2
GND
3
Under the terminal
Table 4-4
– Pin configuration of RS232C terminals
2 wire connection to peripherals:
RS 232C serial connection is done with two wires as indicated below in
Figure 4.7. if there is no data entry to the weighing indicator. Printer, remote display etc. connections can be
done with 2 wire.
Figure 4.7
– 2 wire RS 232C connection with a printer or PC
3 wire connection to the peripherals:
RS232C serial connection is done with three wires as indicated below
in Figure 4.8 for bidirectional interfacing. Typical application is bidirectional BSI format interfacing with PC or
PLC.
Figure 4.8
– 3 wire RS232C connection with a PC or PLC
1
9
