Mitsubishi PAC-SF44SRA, Instruction Book

Page: 30 / 206

9. Using the external input/output
9-1. External signal input function
• In order to use external signal input, use the 5-wire cable for external input that comes with the unit.
(1) External input
By using an external no voltage contact signal, it is possible to send Emergency stop/Normal,
ON/OFF or Prohibit/Permit local remote controller operation commands to all units being
controlled. (This is selected by the SW3 setting. SW3 is mounted on the main unit board.)
(2) Level signal and pulse signal
1. Only emergency stop can be used when SW3-4 "operation prohibit setting
changeover" is set to "OFF (disabled)".
2. If the level input emergency stop and ON/OFF are set, operation of the other system
controllers will be prohibited even if SW3-5 "operation prohibit range changeover" is
set to "OFF (only local remote control)".
(3) External input specifications
30
No.
OFF
3
ON
OFF
ON
OFF
2
SW3
OFF
ON
ON
1
2
3
External input signal functions
Do not use external input.
Change between emergency stop/normal.
During an emergency stop, all units will be stopped, and all operations using this
controller, other system controllers and the local remote control will be prohibited.
Set ON/OFF.
All units will turn ON/OFF according to the input state.
Set ON/OFF and prohibit/permit .
All units will turn ON/OFF and all local remote controller ON/OFF operations will be
prohibited according to the input state. Operation with this controller will be enabled.
When prohibit is input, the local remote control’s ON/OFF, operation mode, set
temperature and filter reset operation will be prohibited. This controller can be operated.
Input state
_
Level input
Level input
Pulse input
(0.5sec or
more)
4
Contact ON
Contact OFF
Contact ON
Contact OFF
Contact ON
Contact OFF
Contact ON
Contact OFF
OFF OFF ON
Normal Normal
Emergency
stop
OFF OFF ON
(A) Level signal
(B) Pulse signal
0.5sec or more
0.5sec or more
(Example) Case of ON/OFF signal
Signal 1 ON
Signal 2 OFF
*Prohibit/Permit is same.
CN2
No. 1
No. 2
No. 3
No. 4
No. 5
Lead wires (5-wires)
Green
Yellow
Orange
Red
Brown
Level signal for Emergency
stop/Normal
Emergency stop/Normal input
Not used
Not used
Not used
Level signal for ON/OFF
ON/OFF input
Not used
Not used
Not used
Pulse signal for ON/OFF,
Prohibit/Permit
ON input
OFF input
Prohibit local remote controller
operation input
Permit local remote controller
operation input
Common 0V