7) External Input/Output Function - Mitsubishi Electric PWFY-P200VM-E-AU Data Book

(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)
• 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. V. 1.(7).2) is ineffective when the circuit is open.
Refer to Table V. 1.(7).1 for information about each contact.
The current in the circuit to be connected to the external output terminal must be 0.6A or less.
Table V. 1.(7).1
OUT1
OUT2
OUT3 *7
OUT4
External input terminal
The piping length must be within 100 m.
External input terminal (refer to Fig. V. 1.(7).2 is ineffective when the circuit is open.
Refer to Table V. 1.(7).2 through Table V. 1.(7).4 for information about each contact.
Only the "pump interlock" function is ineffective when the circuit is short-circuited.
Connect a relay circuit to the external output terminal as shown in Fig. IV. 3.(8).1.
The specifi cations of the relay circuit to be connected must meet the following conditions.
Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
[Table V. 1.(7).2] TB142A
IN1
[Table V. 1.(7).3] TB142B
IN3
IN4
*1 PWFY-P100VM-E-BU
PWFY-P100, 200VM-E-AU
*2 Effective when SW 4-3 is set to ON.
*3 Effective when SW 4-4 is set to ON.
*4 PWFY-P100, 200VM-E-AU only
*5 When Heating ECO mode is effective, the outlet water temp. will be changed
based on ambient temp. automatically. (Except for PQHY/PQRY-series)
*6 When Anti-freeze mode is effective, the unit will set the heating temperature range
between 10ºC~45ºC enabling the unit to maintain low water temperature to prevent
water pipes from freezing.
*7 PWFY-P100VM-E-BU only
Note: When setting Heating ECO or Anti-freeze mode, reset all power supply of all units (outdoor/indoor units).
Note: Dip S/W 1-1 OFF: Water Inlet Temp.
Dip S/W 1-1 ON : Water Outlet Temp.
The factory setting for Dip SW 1-1 is OFF.
Signal priority = External input > centralized controller > remote controller
T(B)°C
T(A)°C
4mA
Operation ON/OFF
Defrost
Compressor
Error signal
Pump interlock
Connection demand
Operation ON/OFF
Hot Water
Heating
[Fig. V. 1.(7).1]
3
2 1
3 2 1
S/W default
T(A)=10°C
T(B)=70°C.
*All setting with a controller.
la
20mA
[Fig. V. 1.(7).2]
[Table V. 1.(7).4] TB142C
COM+
IN5 *1
IN6 *2
IN7 *3
IN8 *4
[Fig. V. 1.(7).3]
- 63 -
3
2 1
current
External
direction
analog input
+
Current generator
TB141A
OUT1 OUT2 OUT3 OUT4
Common
Hot Water/Heating
Heating ECO
*5
Anti-freeze *6
Cooling operation
TB142A TB142B
IN1 IN2 IN3 IN4 COM+
3 2 1
current
direction
+
TB142C
IN5IN6 IN7 IN8