Hitachi PC-ARF Technical Catalogue page 371

5 Centralised remote controls
PSC-A32MN

External Input/Output Setting
The External Input/Output function of the central station provides the capacity to control 4 inputs and 2 outputs.
Select "External Input/Output Setting" on the "Optional Function Setting" screen to access the setting menu.
Input and Output
Input 1
Input 2
Input 3
Input 4
Output 1
Output 2
External Input Function
1 All Run/Stop (Level)
Performs run/stop operation of all groups simultaneously by means of the external input signal.
2 All Run (Pulse)
Performs run operation of all groups simultaneously by means of the external input signal.
3 All Stop (Pulse)
Performs stop operation of all groups by means of the external pulse signal input.
4 Emergency Stop (Level)
The operation of all groups is stopped simultaneously by means of the external emergency stop signal.
While "Emergency Stop" is being carried out, "Central Control" is displayed in the LCD of the remote control switch,
and operation from the remote control switch becomes disabled.
In case of using other central stations together, "Run/Stop" operation is available from the other central stations even
during the emergency stop.
5 Demand Control Function
The external demand control signal allows to cut a peak demand of electrical consumption. The external demand signal
can only be input through input terminal 1.The operation mode of the selected group is changed by the demand signal as
shown below.
Indoor Unit Operation Stop with RCS Operation Prohib-
Demand Function 1
ited Mode
Cooling or Dry Operation
Demand Function 2 (*3)
Fan Operation with RCS Operation Prohibited Mode
Heating Operation
Demand Function 3 (*4)
Operation Stop with RCS Operation Prohibited Mode
Indoor Unit Operation Stop with RCS Operation
Demand Function 4 (*5)
Prohibited Mode
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TCGB0106 rev.0 - 12/2014
Connection
All Run/Stop (Level)
CN1 Pins 1-2
CN1 Pins 2-3
Emergency Stop (Level)
CN2 Pins 1-2
All Run (Pulse)
Demand (Shift of Run/Stop mode / Outdoor Unit Capacity Control)
CN2 Pins 2-3
All Stop (Pulse)
No Setting (Factory Setting)
All Run
CN3 Pins 1-2
No Setting (Factory Setting)
CN3 Pins 1-3
All Alarm
Demand Signal ON (*1)
Function
Demand Signal OFF (*2)
The operation condition returns to the previ-
ous state.
The setting temperature is set as follows.
Cooling and Dry Operation............28ºC,
Heating Operation..........................20ºC
The operating condition returns to the previ-
ous state, except for setting temperature.
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