48
6-2
Connector terminal numbers, their functions and specifications
6-2-1
D-SUB9P Connector for RS232C I/O
Terminal No.
Signal name
Input/output
Function
1
-
-
-
2
RXD
Input
Receiving data
3
TXD
Output
Transmitting data
4
DTR
Output
HIGH
(When the scale
is powered ON)
5
GND
-
Signal grounding
6
-
-
-
7
-
-
-
8
-
-
-
9
EXT. TARE
Input
External contact
input for tare
subtraction
Items
Description
Transmission system
Serial transmission, Start-stop synchronisation, Bidirectional
Equivalent to EIA RS-232C
Signal level
High level (data logic 0) +5 to +15 V
Low level (data logic 1) -5 to -15 V
Baud rate
1200/2400/4800/9600/
19200/38400/57600/115200 bps
Transmission code
Composition
Start bit
1 bit
Parity bit
None/Odd number/Even number
Data bit
8 bit
Stop bit
1 bit/2 bit
Use shielded crossover serial cable up to 15 m length.
- Use the following examples as a guide to connect the
scale to external devices using the cable.
- Tare subtraction can be executed from an external
device by connecting a contact or a transistor switch
between the pin 1 (EXT.TARE) and pin 5 (GND).
When doing so, allow at least 400 ms for connection
(ON) time (Maximum voltage: 15 V when the scale is
turned OFF, sink current: 20 mA when it is turned ON).