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4
CONNECTION
Wiring diagram
12 to 24V DC 10%
+
+V
0V (Note)
-
OUT-1
OUT-2
Load
ALM. (Self-diagnosis output)
Load
Load
+
-
0V (Note)
30V DC or less
IN-0
IN-1
IN-2
*1
*1
*1
0V (Note)
I/O circuit diagram
+ V
+
D
0V (Note)
-
OUT-1, OUT-2
ALM., Answer-back
Output
Tr
Z
D
0V (Note)
Input
IN-0, IN-1, IN-2
RUN / SET, SET-1, SET-2
Internal circuit
Users' circuit
Note: 0V of power supply is isolated from 0V of input / output circuitry. To share the
power supply with a load, both the 0V terminals should be short-circuited.
Symbols ... D
: Reverse supply polarity protection diode
Z
: Surge absorption zener diode
D
T
: NPN output transistor
r
RS-232C wiring diagram (GD-C2 only)
Connector pin No.
TXD (3)
TXD
RXD (2)
RXD
RS (7)
CS (8)
SG (5)
SG
5
SENSITIVITY SETTING
Teaching through operation panel
Procedure
Turn the power on.
Check that the power indicator lights up.
Open the panel cover.
Select 'PANEL' by pressing 'CH-SELECT key'.
This enables the keys on the panel.
Select one of eight channels by pressing the 'channel shift key'.
To modify a previously stored date, choose the particular channel.
Otherwise, choose any channel from 1 to 8.
If the selected channel does not have data stored in it, the self-diag-
nosis indicator lights up.
Enter into the SET mode from RUN mode by pressing the 'SET-
MODE key'. (Note 5)
The self-diagnosis indicator lights up.
The designated channel number blinks.
Press the '0-ADJ. key' while no object exists between
the sensor heads.
(Note 1)
After the sensing level indicators light up one after the
(Note 2)
other for about four cycles, both OUT-1 and OUT-2
blink twice at the same time.
Place one sheet between the sensor heads, and then
press the 'SET-1 key'.
The sensing level indicators blink one after the other
(Note 1)
for about four cycles. After that, OUT-1 blinks twice.
Hold the object steadily between the sensor heads while
the sensing level indicators are lighting up in rotation.
Place two sheets between the sensor heads, and then
press the 'SET-2 key'.
The sensing level indicators light up one after the oth-
(Note 1)
er for about four cycles. After that, OUT-2 blinks twice.
Hold the object ssteadily between the sensor heads while
the sensing level indicators are lighting up in rotation.
If the teaching fails, all the sensing indicators blink at the
*
same time. In this case, repeat the sensitivity setting af-
ter changing the setting of the sender and the receiver.
Return to the 'RUN mode' from SET mode by pressing the 'SET-MODE key'.
The self-diagnosis indicator turns off. [If it does not turn off, an error may be in-
herent. Refer to '
6
EXPLANATION OF FUNCTIONS', ' Self-diagnosis (Alarm)
function'.]
The indicated channel number changes from blinking into continuous lighting.
During the RUN mode, the '0-ADJ. key', 'SET-1 key', and 'SET-2 key' are ineffective.
Sender Receiver
Color code
1
White
11
2
Shield
12
3
White
13
4
Black
14
5
Shield
15
6
RUN / SET
16
7
SET-1
17
8
SET-2
18
9
ANS. OUT (Answer-back output)
19
10
0V (Note)
20
Load
+
30V DC
or less
-
12 to 24V DC
10%
Load
+
-
100mA max.
*1
TXD
: Transmit date, command
RXD
: Receive date, command
RS
: Request-to-send
CS
: Clear-to-send
SG
: Signal ground
RS
CS
Operation
No sheet
One sheet
Two sheets
Blink
*1
Non-voltage contact or NPN open-collector transistor
Low: 0 to 1V, High: 4.5 to 30V, or open
*1
*1
*1
Note: The terminal
output circuitry for noise immunity. However, if you except to share
the power supply with the output loads, connect terminals
terminals
External channel select truth table
Channel No.
1
30V DC
2
or less
3
4
5
6
7
8
L: Low (0 to 1V), H: High (4.5 to 30V, or open)
Pin arrangement
Notes: 1)
The order of the above procedure at
The 'SET-1 key' searches the one-sheet level, and the 'SET-2 key' the
two-sheet level. After having selected the SET mode, only by pressing
either one once, the one-sheet or two-sheet levels are not undated. Af-
ter having pressed the 'SET-1' and 'SET-2' keys once in SET mode, as
PANEL
long as it is in SET mode, the one-sheet or the two-sheet level is updat-
LOCK
ed by pressing either SET keys. The moment the RUN mode is set, the
EXT.
data is confirmed. (Setting complete)
2)
The zero-sheet level is common for all eight channels. Once the zero-
sheet level is set for one channel after the sensor heads are installed,
there is no need to set it again for the other channels.
However, set the one-sheet level and the two-sheet level on each
CH
channel, once again, when 0-ADJ. key is pressed since this resets
the zero-sheet level as per the prevailing conditions.
3)
The set data is not erased even if turns the power off.
4)
If the setting of the sender and receiver is changed after teaching, de-
RUN
tection may become unstable. In this case, perform the teaching once
SET
again.
Teaching by external input
The teaching can also be performed by external input signals.
<Time chart>
RUN / SET
RUN
selected input
SET-1 input
Answer-back
output
1ms or less
(ANS. OUT)
SET-2 input
Answer-back
output
(ANS. OUT)
Notes: 5) In case the set indicator blinking, double-feed teaching can-
not be conducted.
The error release method is pressing down SET-1 and SET-
2 together more than 5 seconds or making SET-1 or SET-2
input wire Lo side more than 5 seconds.
Conduct the teaching after the set indicator (red) is changed
to blinking.
or
, 0V of power supply, is isolated from 0V of input /
and
, or terminals
and
Input
IN-0
IN-1
L
H
H
L
L
L
H
H
L
H
H
L
L
L
H
H
TXD
Not connected
SG
5
9
Not connected
CS
9-pin connector (female)
,
and
SET
50ms or more
50ms or more
CPU processing
Teaching successful
time (a few seconds)
50ms or more
50ms or more
CPU processing
1ms or less
time (a few seconds)
and
,
to make 0V common.
IN-2
H
H
H
L
L
L
L
H
RXD
Not connected
3
2
4
1
8
7
6
Not connected
RS
is arbitrary.
High
Low
High
Low
High
Low
High
Low
Teaching not successful
High
Low
Teaching successful
RUN
SET
RUN
SET
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