7.1 Terminal Numbers and Functions
Terminal Number
Signal
Input/output
Function & remarks
1
EXT.TARE
Input
External tare subtraction
※
2
DTR
Output
HIGH (when balance is powered-up)
3
RXD
Input
Receiving data
4
TXD
Output
Transmitting data
5
GND
—
Signal ground
Compatible plug: TCP 0556-01-0201 (Hoshiden - supplied with balance)
RS232C connector (DIN 5-pin): Rear panel
※
Tare subtraction (zero adjustment) is possible by connecting an external tare subtraction input and a
signal ground, through contacts or a transistor switch. When following this procedure, secure a
connection time of at least 400 milliseconds. (When the switch is off, the voltage maximum is 15 V;
when the switch is on, the sink current is 20 mA or less.)
Caution:
Before plugging in the connectors, unplug the AC adaptor.
19
7.2 Connection between Balances and Personal Computers
Sample connection with an IBM-PC/AT compatible
1
4
2
5
3