13-3.External Input/Output Function - Mitsubishi Electric City Multi PWFY-P100VM-E-BU Data Book

13. CONTROL
13-3. External input/output function
Preset temperature input (external analog input: 4mA-20mA)
External input
Input through CN421, CN422 on the circuit board.
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.
Method
Input T(A), T(B)
Changeable with
4mA :T(A)
PAR-W21MAA
20mA:T(B)
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
External output terminal
External output terminal (refer to [Fig. 1-7-A]) is ineffective when the circuit is open.
Refer to [Table 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.
(A) PWFY-EP-VM-E-AU
TB141A
OUT1 OUT2 OUT3 OUT4
Contact AC250V
rating
AC125V
voltage
DC30V
MEES19K013
3 2 1
3 2 1
External
analog input
T(B)°C
T(A)°C
(B) PAC-SV01PW-E
TB1
1 2 3
Contact rating current
1A or less
3A or less
3A or less
3
3
2 1
current
direction
+
Current generator
4mA 20mA
[Table 1]
Operation ON/OFF
OUT1
Defrost
OUT2
Compressor
OUT3 *7
Error signal
OUT4
AIR TO WATER
2 1
current
direction
+
S/W default
T(A)=10°C
T(B)=70°C.
*All setting with a controller.
la
[Fig. 1-7-A]
TB141A
OUT1 OUT2 OUT3 OUT4
45