External Input/Output; External Input Signal Function - Mitsubishi Electric G-50A Technical Manual

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)
No. Function of the external input signal
1 Do not use the external input signal
2 Emergency stop/regular (level signal)
3 Start/stop (level signal)
4 Start/stop and prohibition/permission (pulse signal)
(2) Level signal and pulse signal
(A)Level signal
Contact point ON
Contact point OFF
Stop
Contact point ON
Contact point OFF
Regular
(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.
CN2 Lead wire Emergency stop/regular level signal
No. 5 Orange Emergency stop/regular input
No. 6 Yellow
No. 7 Blue
No. 8 Gray
No. 9 Red
Table 5-2 External input function table
Function selection switch
(B)Pulse signal
Example: During start/stop (similar during prohibition/permission)
Operation Stop
Signal 1 (operation)
Signal 2 (stop)
Emergency stop Regular
Table 5-3 External input interface specifications
Unused
Unused
Unused
Common (external DC power supply +12V or +24V)
Optional: PAC-YG10HAA
No. 6 No. 7
OFF OFF None (factory shipping condition)
OFF ON 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.
ON OFF Disables the prohibition/permission operation from the
local remote controller, the start/stop operation on the main
unit, and the prohibition/permission change operation.
ON ON Please set the pulse length during contact point ON to 0.5 - 1 second.
Contact point ON
Contact point OFF
Contact point ON
Contact point OFF
Start/stop (level signal)
Start/stop input
Unused
Unused
Unused
Remarks
0.5 - 1 second
0.5 - 1 second
Stop Operation Stop
Start/stop prohibition/permission pulse signal
Operation input
Stop input
Local remote controller operation prohibition input
Local remote controller operation permission input
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