Rs-232 Interface Hardware - Gram FD Serie Manual De Utilización

RS-232 INTERFACE hARDwARE

This balance adopts the transmit and receive lines of standard RS-232.
The data format is:
1 start bit.
8 data bits include parity.
1 stop bit.
The instruction to connect the balance to external device is as follows:
Pin description
2 – TXD - - - scale transmits data
3 – RXD - - - scale receives data
5 – GRD - - - signal ground
Note: "handshake" signals, such as "clear to send" (CTS) are not used. The
peripheral must have a mínimum buffer (15 characters).
It is suggested that the máximum recommended cable lenght is 15 meters,
the load impedance of the device connected should be between 3000 and
7000 ohms with no more than 2500 pf shunt capacitance.
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