172-65627M-09 (SQ10) 18 Oct 2021
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3. External input/output
The unit is capable of receiving the following inputs:
(1) Operation input (voltage free contact, pulse)
Operation of the unit can be
started/stopped.For signals, use voltage
free contacts that can be operated for 1
to 3 seconds.
In addition, make sure that the
"Operation Start" and "Operation Stop"
contacts are not closed simultaneously,
as doing so can cause the unit to
malfunction.
Terminal block numbers:
Operation Start: +V, 13
Operation Stop: -V, 14
(2) Target value input (analog signal)
The target temperature value can be set
remotely by switching on the Set
Temperature Remote Input button.
The analog signal input should be
between 4 and 20 mA.
When setting the target value via analog signal, the set temperature range
is from 0
C to 100
C.
Therefore, the output range should be: 4 mA
→
0
C, 20 mA
→
100
C.
Terminal block numbers: 07, 08, SE*
* Should be used as ground for shielded cables
NOTE: Discrepancies may occur between the input current value and the set
temperature, depending on the situation (e.g. when the signal is 12 mA,
the temperature is 50.3
C instead of 50
C).
Be sure to carry out thorough adjustments before using.
Furthermore, the following output can be obtained.
(3) Operation output (voltage free contact)
The signal can be obtained as a voltage
free contact external signal during
operation.
Terminal block numbers: Operation
Output: 23, 24
(4) Alarm output (voltage free contact)
Signals for high temperature alarm, low
temperature alarm and system alarms
can be obtained as an external signal of
the voltage free contacts.
NOTE: One signal for all outputs.
Terminal block numbers: Temperature
Alarm Output: 25, 26
(5) Hot water outlet temperature (analog
signal)
The outlet temperature of water can be
obtained from the control panel as a 4
