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12. D/A Converter (TD-260T AC(D/A) / TD-260T DC(D/A) )
The D/A output circuit is isolated from the TD-260T internal
circuit.
The analog output ranges are 0 to ± 10 V in voltage and 4 to
20 mA in current.
Using the D/A zero and D/A full-scale functions, you can
respectively obtain analog output zero (0 V, 4 mA) and full
scale (±10 V, 20 mA) for any digital value you set.
Notice that the output current for the output voltage 0 V is 4
mA and the output current for the output voltage 10 V is 20
mA.
You cannot set a value for the output current and output
voltage separately when you change the zero point or full
scale setting.
Resolution is ±1 per 10000 for 0 to ±10 V, and the conversion
rate is 100 times per second.
The D/A converter has an overrange capability of about ±10 %
on the output.
12-1. Panel
1
2
3
4
1
Voltage output V +
2
Voltage output V -
3
Current output I +
4
Current output I -
12-2. Connections
Connect an external device with a load resistance of 2 kΩ or
more to the voltage outputs V + and V -.
Connect an external device with a load resistance of 350 Ω or
less, including a cable resistance, to the current outputs I + and
I -.
+
–
+
–
+
–
TD-260T
2kΩ or more
of load
resistance
External
device
I
V
–
+
GND
GND
shield
shield
External
device
350Ω or less
of load
resistance
12-2-1. Connecting to screwless terminal block
To connect wires to the terminal block, use the provided
flathead micro screwdriver or equivalent.
1. Strip off about 10-12 mm of the insulation from an
end of each wire you connect, and then gently twist
each bare end.
Use wires 0.4-1.2 mm² in cross-sectional area.
2. Press the button next to the corresponding wire
insertion hole by using the screwdriver.
3. While keeping each wire end twisted, insert it into
the corresponding wire insertion hole.
4. Release each button.
5. Lightly pull each wire and make sure that they are
securely clamped.
NOTE
To reduce the unnecessary radio frequency emission, be
sure to install the provided ferrite core on the output cable
(voltage or current).