65
16. I/O UNIT SPECIFICATIONS
(Standard interface)
16-1 RS-232C/Comparator Contact Output/External Contact Input
D-Sub 25 pin numbers
D-Sub 25 pin assignments
Pin No. Signal name
Interface type
Direction
Description
1
FG
-
Frame ground
2
RXD
RS-232C
Input
Receive data
3
TXD
RS-232C
Output
Transmit data
4
RTS
RS-232C
Input
Ready to send
5
CTS
RS-232C
Output
Clear to send
6
DSR
RS-232C
Output
Data set ready
7
SG
RS-232C/external contact input
-
Signal ground
9
LL
Comparator
Output
Output LL (Only when five-level
comparison is selected)
*
12
HH
Comparator
Output
Output HH (Only when five-level
comparison is selected)
*
16
LO
Comparator
Output
Output LO
18
External contact input
Input
Same as the PRINT key
19
RE-ZERO
External contact input
Input
Same as the RE-ZERO key
21
COM
Comparator
-
Common
23
HI
Comparator
Output
Output HI
25
OK
Comparator
Output
Output OK
Others
-
-
-
No connection
*
AD-4212B: standard, AD-4212A: when OP-04 is installed
RS-232C
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, 19200bps
Data bits
: 7 or 8 bits
Parity
: Even, Odd (Data bits 7 bits)
None
(Data bits 8 bits)
Stop bit
: 1 bit
(When sending, 2 bits; receiving, 1 bit.
A personal computer will function with either
setting.)
Code
: ASCII
Summary of Contents for AD-4212A
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