Mitsubishi Electric GB-24A Installation Manual download pdf (Page 10)

(A) For level signal

1. When the emergency stop/normal signal is selected, the status will change from normal to

emergency stop when the external input signal contact changes from OFF to ON, and will change

from emergency stop to normal when the contact changes from ON to OFF. Emergency stop signal

will bring the air conditioners to stop, and canceling the emergency stop will not automatically reset

these units. To return to the previous operation status, they must be manually turned back on.

2. When the ON/OFF signal is selected, the status will change from OFF to ON when the external

input signal contact changes from OFF to ON, and will change from ON to OFF when the contact

changes from ON to OFF.

(B) For pulse signal

1. Even if the ON signal is input during ON, the status will remain ON.

2. If the local remote controller is prohibited, the ON/OFF operation mode and temperature setting

operations by the local remote controller will be prohibited.

3. Set the pulse width (contact ON time) to 0.5 to 1 sec.

4-2. External output function

(1) The function of external output

●The “ON” signal is output when one or more air conditioner are in the ON operation.

●The “Malfunction” signal is output when one or more air conditioner malfunctions.

(2) External output specifications

1. “ON” signal and “Malfunction”

signal will both be shown.

CN2 Lead wire Description of each terminal

No. 1 Green Common (External ground)

No. 2 Black ON/OFF

No. 3 Brown Malfunction/normal

1 2 ... 5 6 7 8 9 10 11 12

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Mitsubishi Electric GB-24A Installation Manual Page 10