25
Optional: PAC-YG10HAA
5.2 External input/output
The main unit of the G-50A is equipped with an external input/output function. This function enables
external input control and output monitoring for each G-50A unit.
This function uses the main unit of the G-50A’s CN2. For use, please purchase the optional external
input/output adapter (PAC-YG10HAA).
5.2.1 External output signal function
(1) External input
Using the external signal indicating contact point voltage (DC 12V or DC 24V) all air conditioning units
managed, can be controlled for emergency stop/regular start/stop and for prohibition/permission for
local remote controller operation.
Switching of each input mode can be set from the main unit of the G-50A or by using the default setting
tool. (Default value: not used)
Table 5-2 External input function table
No.
1
2
3
4
Function of the external input signal
Do not use the external input signal
Emergency stop/regular (level signal)
Start/stop (level signal)
Start/stop and prohibition/permission (pulse signal)
Remarks
None (factory shipping condition)
An emergency stop signal will stop the operation of all air
conditioning units while disabling the prohibition/permission
operation from the local remote controller, the start/stop operation
on the main unit, and the prohibition/permission change operation.
Disables the prohibition/permission operation from the
local remote controller, the start/stop operation on the main
unit, and the prohibition/permission change operation.
Please set the pulse length during contact point ON to 0.5 - 1 second.
Function selection switch
No. 6
OFF
OFF
ON
ON
No. 7
OFF
ON
OFF
ON
(2) Level signal and pulse signal
(A)Level signal
(3) External input interface specifications
The external input interface specifications are outlined in Table 5-3.
In the table below, the color of each lead line signifies the color of the optional external input/output cables.
(B)Pulse signal
Example: During start/stop (similar during prohibition/permission)
Table 5-3 External input interface specifications
CN2
No. 5
No. 6
No. 7
No. 8
No. 9
Lead wire
Orange
Yellow
Blue
Gray
Red
Emergency stop/regular level signal
Emergency stop/regular input
Unused
Unused
Unused
Start/stop (level signal)
Start/stop input
Unused
Unused
Unused
Start/stop prohibition/permission pulse signal
Operation input
Stop input
Local remote controller operation prohibition input
Local remote controller operation permission input
Common (external DC power 12V or +24V)
Contact point ON
Stop
Operation
Stop
Regular
Emergency stop
Regular
Contact point OFF
Contact point ON
Contact point OFF
Contact point ON
Signal 1 (operation)
Stop
Operation
Stop
0.5 - 1 second
0.5 - 1 second
Contact point OFF
Contact point ON
Signal 2 (stop)
Contact point OFF
Summary of Contents for Central Controller G-50A
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