
14
3-4. Connecting to control I/O terminals
3-4-1. Connecting external input
An input signal is generated from an external input circuit
when a control terminal and COM terminal on the external
input circuit are short-circuited and then opened.
Terminals can be short-circuited through contact or
noncontact technologies (transistor, TTL open collector).
When contact signal is used:
ON when IN is high
When TTL open collector is used:
IN
Approx.
10mA
TD-260T
PUSH Switch
Vcc
A9 COM
+12V
When transistor is used:
<
The current draw is about 10 mA when the external contact
is in ON state. Use a contact device with a withstand voltage
of 20 V or more and about 20 mA capacity in ON state.
<
The common terminal for control input/output terminals A5
(CLEAR), A6 (JUDGE), A7 (HOLD), and A8 (D/Z) is A9 (COM).
<
Do not apply external voltages.
3-4-2. Connecting decision outputs
N/O
TD-260T
COM
Load
Spark Killer
DC
Power Supply
Diode
<
Relays are used for decision outputs. The relay contact
rating is 1 A and 30 V DC. Be sure to use relays within the
specified current and voltage ratings.
<
Install a spark killer for noise reduction as close to the load
circuit, such as relay coil, you use as possible.
<
Use a rectifying diode.
<
The common terminal for control output terminals B5 (HH)
and B6 (HI) is B7 (COM).
<
The common terminal for control output terminals B2 (LL)
and B3 (LO) is B4 (COM).
3-4-3. Connecting voltage output (V-OUT)
The output voltage is proportionate to the sensor input and
approximately 2 V for a sensor input of 1 mV/V.
The above output voltage is produced after the zero point
of the sensor has been calibrated during the calibration
procedure.
With the digital zero function (D/Z), the output voltage cannot
be reduced to zero.
B1
A1
–
+
Load
resistance
2kΩ or more
External Device
–
+
Voltage Output
TD-260T
GND
shield
<
This output is not isolated from the internal circuit. Be
sure to install an external device as close to this output as
possible by using 2-core shielded cables or equivalent.
3. Connections