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Connection of Power cables/Earth wires/
2
Signal wires
I/O Port Connection
The I/O Port is used to control air conditioners by interlocking them with electric lock signals and fire alarm
signals, and to transmit air conditioner failures to other devices.
I/O Port
Pin No.
Signal name
1
2
3
4
5
6
7
8
9
10
Input/Output specifications
Input
Output
(1) The example of input circuit is shown below.
It is electrically insulated by the photo-coupler.
10 k ohm
(continued)
10
↓ Front (LCD side)
Input plus common
PI_PCOM
PI(0)
Input 0
Input 1
PI(1)
PI(2)
Input 2
P_PO(0)
Output 0+
N_PO(0)
Output 0-
P_PO(1)
Output 1+
N_PO(1)
Output 1-
P_PO(2)
Output 2+
N_PO(2)
Output 2-
Input type
Number of input
Input resistance
Output type
Number of output
Output current
Output voltage
PI_PCOM
3 k ohm
1/2 W
Input c
PI(0) - PI(2)
ontact
Input/Output
connector
1
Remarks
Photo-coupler insulation
3
3k ohm
Open collector
3
Max. 100mA (per 1 output)
Less than 30V DC
(2) The example of output circuit is shown below.
It is electrically insulated by the photo-coupler.
330 ohm
External power supply
(12 V - 24 V DC)
6
(External circuit)
load
P_PO(0) - P_PO(2)
PC357
2SD780A
4.7 k ohm
N_PO(0) - N_PO(2)
Input/Output
connector
External power
supply
(Max. 30 V DC)
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