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Communications
7.0
Communications
The balance can be connected to a computer using a compatible third party software program. Connections can be made using
RS-232. Basic specifications include:
• RS-232C full duplex
• Asynchronous communication
• RS-232C: EIA-232-D/E
• Baud Rate: 1200-115200 bps
• Transmission: 1 start bit, non/odd/even number parity, 8 data bit, 1-2 stop bits
7.1 RS-232 Connections
The balance can be equipped with an optional RS-232 feature
for communication with printers and computers.
Figure 7-1. RS-232 Connection
The DB-9 connector can set a tare range or adjust the zero point from an external device by connecting a contact or
a transistor switch between the pin for externally setting a tare range (pin 9) and the signal ground (pin 5).
Allow at least 400 ms for connection (ON) time (Maximum voltage: 15 V when the balance is turned OFF, sink current:
20 mA when it is turned ON).
Pin Number
Signal
Input/Output
Function
1
-
-
-
2
RXD
Input
Receive Data
3
TXD
Output
Transmit Data
4
DTR
Output
High (when the balance is powered on)
5
GND
-
Signal Grounding
6
-
-
-
7
-
-
-
8
-
-
-
9
Ext. Tare
Input
External Tare Range Setting
Table 7-1. Pin Connections
D-SUB9P Male Connector
Cable Fixing Screw: No. 4-40 UNC
Use this example as a guide to
connect the
balance to external
devices using the cable.
Sample connection with a PC/AT
compatible machine.
Note
Содержание TA Plus 124
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