AD-4407A Weighing Indicator
Page 59
15.
Relay Output and Control Input (OP-05)
Replacing the RS-232C interface with this option, 3-relay outputs and 3-control
inputs can be used with the RS-232C interface of this option.
RS-232C functions are the same as the RS-232C interface described in “13.
RS-232C Interface”.
The solid state relays output the result of comparison.
The control inputs can control the indicator from an external terminal just like the
front panel key operations.
Set the external control functions at
f13
-
f15
of the F-Functions.
When connecting each function pin to the common pin, the indicator makes the action.
Keep a signal width of more than 100 ms for the On-time and Off-time.
ON (Make)
OFF (Break)
Pin connections and Circuits
Function Pin No. Signal name Direction Description
RS-232C
1
TXD
Output
Transmit data
2
RXD
Input
Received data
3
DSR
Output
Data set ready
4
SG
-
Signal ground
Relay
output
5
HI
Output
Relay output HI
6
OK
Output
Relay output OK
7
LO
Output
Relay output LO
8
COM(out)
-
Relay output common
Control
input
9
EXT1
Input
Control input 1 (
f13
)
10
EXT2
Input
Control input 2 (
f14
)
11
EXT3
Input
Control input 3 (
f15
)
12
COM(in)
-
Control input common
FG
13
FG
-
Frame ground (case)
15. Relay Output & Control Input (OP-05)
TXD RXD DSR SG HI OK LO COMo EXT1
HI
OK
LO
Relay output
RS-232C
J
20
1
2
3
4
5
6
7
8
9
EXT2 EXT3 COMi FG
10 11 12
13
Control input
Case
RXD
TXD
i
EXT3
EXT2
EXT1
+7
~
9V
680
Ω
Relay specifications
Maximum voltage
50V DC
Maximum current
100mA DC
Maximum resistance
8
Ω
More than 100ms
More than 100ms
Summary of Contents for OP-03
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