External I/O Specifications - Mitsubishi Electric PFD-P250VM-E Installation Manual

7.5. External I/O Specifications

I/O Specifications
Input
Function Application
Start/Stop Turning ON/
OFF the indoor
unit
Dehumidifica- Sending a com-
tion signal mand to perform
dehumidification
with priority
* 1 Use minute-current contact (DC12V 1mA)
Caution:
1. Wiring should be covered by insulation tube with supplementary insu-
lation.
2. Use relays or switches with IEC or equivalent standard.
3. The electric strength between accessible parts and control circuit should
have 2750 V or more.
Output
Function Application
External output of operation
Operation
status signal for each coolant
status
circuit of indoor unit.
External output of fault signal
Fault for each coolant circuit of
indoor unit.
[Fig. 7.5.1] (P.6)
<A> Model 250
<B> Model 500
A With-voltage input
C Start/Stop
E Common
G Relay contact output
I Operation status
K External I/O board
M Connector connection
A With-voltage input
Pulse input of start or stop
External power DC12 - 24 V
supply Input current (per contact)
Approximately 10 mA (DC12 V)
Remote Start/Stop switch
SW12
* Toggles ON/OFF each time switch is pressed (pulse input).
D No-voltage input
Remote Start/Stop switch
SW11
* Toggles ON/OFF each time switch is pressed (pulse input).
Contact: Minimum applicable load DC 12 V 1 mA
Contact rating DC 12 V 0.1 A and over
G Relay contact output
Display power DC30 V 1 A or less
supply AC220 - 240 V 1 A
L1, L3 Operation status
L2, L4 Fault status
XA ~ XE Relay (allowable current 10 mA - 1 A)
14
Signal specifications
Pulse [Factory setting: Dip SW1-9 ON]
(a-contact with voltage/without voltage)*1
<With voltage>
Power Source: DC12~24V
Electrical Current:
Approximately 10mA (DC12V)
<Standard Pulse>
over 200ms over 200ms
(Pulse powering time) (Pulse interval)
Level [Dip SW1-9 OFF]
Short: operate
Open: stop
Level
Refer to the wiring diagram <Dehumidifi-
cation command>.
Signal specifications
Relay "a" contact output
DC30 V or AC220 - 240 V
Contact rated current: 1 A
Contact minimum load: 10 mA
B External power supply
D No-voltage input
F Start/Stop
H Display power supply
J Fault
L Terminal block connection
N Wiring distance 100 m or less.
• Settings for indoor unit
Check that the following settings have been entered when using external input.
1) Control board DIP SW3 - 8 ON
(Set to ON prior to shipment from factory. External input disabled when set to
OFF.)
2) Address board DIP SW1 - 10 OFF
(Set to OFF prior to shipment from factory. External input disabled when set
to ON.)
3) Normal/Local switch inside unit control box set to Normal.
(Set to Normal prior to shipment from factory. External input disabled when
set to Local.)
Wiring Method
1. Check the indoor unit settings (Refer to 7. Electrical Wiring Diagram).
2. When using the external output function, connect the signal lines to the ex-
ternal output terminal (TB22) of the unit as appropriate for the application.
Peel the cover of wires and connect to the terminals.
3. When using the external input function, connect the signal lines to the exter-
nal input terminal (TB21 or TB23) of the unit as appropriate for the applica-
tion. Peel the cover of wires and connect to the terminals.
Caution:
1. TB21 is a dedicated terminal for no-voltage contact input. Connection
to a voltage may result in a fault in the indoor control board.
2. TB23 is a dedicated terminal for voltage contact input. Connect only
after checking polarity. Failure to do so may result in a fault.
3. When using AC220 - 240 V, ensure that input wiring and communication
cables are installed separately from output wiring.
4. External signal lines may be extended up to 100 m.
[Fig. 7.5.2] (P.6)
A Site wiring
B Fix low-voltage system (DC30 V or less) wiring with clamps and pass to unit via
transmission line wiring holes.*1
C Fix high-voltage system (AC220 - 240 V) wiring with clamps and pass to unit via
power supply wiring holes.*2
D To CN51 on control board (air-conditioner internal wiring).
E model 500 only
*1 Installation together with AC220 - 240 V high-voltage system wiring may re-
sult in mis-operation of the unit due to noise.
*2 Installation together with DC30 V (or less) low-voltage system wiring may
result in mis-operation of the unit due to noise.
<Arrangement parts on site>
External output functions
Product name
Use plastic-sheathed cord or cable.
External output Wiring type: CV, CVS, or equivalent.
signal lines Wiring size: Twisted 0.5 mm
Single wire: ø0.65 mm - ø1.2 mm
Display lamps No-voltage "a" contacts
etc.
External input functions
Product name
Use plastic-sheathed cord or cable.
External input Wiring type: CV, CVS, or equivalent.
signal lines Wiring size: Twisted 0.5 mm
Single wire: ø0.65 mm - ø1.2 mm
Switches No-voltage contacts
Model and specifications
- 1.25 mm
2 2
DC30 V 1 A or less
AC220 - 240 V 1 A or less
Model and specifications
- 1.25 mm
2 2