41
13. Standard Input and Output Interface
13.1.
RS-232C Interface
The balance is a DCE device. Connect the balance to a personal computer (DTE) using a
straight-through cable.
Transmission system : EIA RS-232C
Transmission form
: Asynchronous, bi-directional, half duplex
Transmission rate
: 10 times/second or 5 times/second (same as data refresh rate)
Data format
: Baud rate : 600, 1200, 2400, 4800, 9600, 19200 bps
Data bits : 7 or 8 bits
Parity
: Even, Odd (Data bits 7 bits)
None
(Data bits 8 bits)
Stop bit : 1 bit
Code
:
ASCII
D-Sub 25-pin assignments
Pin No. Signal name Direction
Description
1
-
-
No connection
2 TXD
Output
Transmit
data
3 RXD Input
Receive
data
4
-
- No
connection
5 SG - Signal
ground
6 DSR
Output
Data
set
ready
7 RTS Input
Request
to
send
8 CTS
Output
Clear
to
send
9
-
- No
connection
Signal names of the balance side are the same as
the DTE side with TXD and RXD reversed.
Start bit
Data bits
Parity bit
Stop bit
-5V to -15V
+5V to +15V
RS-232C
#4-40 UNC
Balance side
DCE
Computer side
DTE
Inside of balance
Terminal example
+5V
3.3k
TXD 2
RXD 3
RTS 7
CTS 8
DSR 6
SG 5
RXD
TXD
RTS
CTS
DSR
SG
Summary of Contents for HR-300i
Page 1: ...Analytical Balance HR 300i HR 202i 1WMPD4000912C...
Page 7: ...5...
Page 56: ...54 15 1 External Dimensions Unit mm...
Page 62: ...60 MEMO...