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• External analog input
Use the supplied connector.
If no temperature settings are made via the MA remote controller,
the temperature changes with the current of generator.
External output terminal
External output terminal (refer to Fig. V. 1.(7).3) is ineffective when the circuit is open.
Refer to Table V. 1.(7).1 for information about each contact.
The current and voltage in the circuit to be connected to external output terminal (TB141A OUT1) must meet the following
conditions.
When a solenoid valve kit is connected
• Connect the "1" and "2" on solenoid valve kit TB1 to the OUT1 on PWFY external output terminal.
• Run the external signal input cable through the access hole for external wiring output wire on the PWFY unit.
If the hole is already used to run other wires from the existing PWFY units, use any other wire access holes except
the control wire access hole.
Contact rating current
Contact
rating
voltage
AC250V
1A or less
AC125V
3A or less
DC30V
3A or less
(7) External input/output function
Preset temperature input (external analog input: 4mA-20mA)
• External input
Input through CN421, CN422 on the circuit board. (Fig. V. 1.(7).1)
OUT1
OUT2
OUT3
*7
OUT4
Operation ON/OFF
Defrost
Compressor
Error signal
[Fig. V. 1.(7).1]
[Fig. V. 1.(7).3]
OUT4
OUT3
OUT2
TB141A
OUT1
CN421
(BK)
(BU)
CN422
3
2
2
1
1
3
CN421
(BK)
(BU)
CN422
3
2
+
2
1
1
3
current
direction
Current generator
External
analog input
+
current
direction
Method
Input T(A), T(B)
4mA :T(A)
20mA:T(B)
S/W default
T(A)=10°C
T(B)=70°C.
*All setting with a controller.
T(B)°C
T(A)°C
4mA
20mA
la
Conversion equation:To=[{T(B) - T(A)}/16] × Ia + [ T(A) - {T(B) - T(A)}/4]
To: set temperature, Ia: analogue input value (mA)
Calculation example: T(A)=30°C, T(B)=70°C, Ia=10mA
Conversion equation: To=2.5 × Ia+20 To=45°C
Changeable with
PAR-W21MAA
[Table. V. 1.(7).1]
TB141A
(A)
(B)
OUT2
OUT1
OUT3 OUT4
TB1
1 2 3
(A) PWFY-P-VM-E-AU
(B) PAC-SV01PW-E
[Fig. V. 1.(7).2]
