External Input/Output; External Signal Input/Output Function - Mitsubishi Electric EW-50A Installation And Instruction Manual

9. External input/output

9-1. External signal input/output function

To reduce the risk of injury, do not touch the burrs of the knockout holes.
To use external input/output, a separately-sold external input/output adapter (PAC-YG10HA-E) is required.
When connecting an external input/output adapter (PAC-YG10HA-E), cut out the CN5 knockout hole. (Refer to
section 2-1 "Part names" for the location of CN5.)
Note
● Connect the external input/output adapter to each AE-200/AE-50/EW-50. (External input signal to AE-200 cannot perform the
collective operations (e.g., emergency stop) for AE-50/EW-50 systems.)
● Use caution not to damage the circuit board with tools when cutting out the knockout hole.
● Set the [External Input Setting] setting for each EW-50 on the [Basic System] screen on the Web browser for Initial Settings.
9-1-1. External signal input function
Using external contact signals (12 or 24 VDC), the following collective operations for all connected air conditioning
units can be controlled: Demand level, Emergency stop, ON/OFF operation, and Prohibit/Permit local remote
controller operation.
(1) Recommended circuit
(A) Level signal
CN5
EW-50
(B) Pulse signal
CN5
Red
9
Gray
8
Blue
7
Yellow
6
Orange
5
1
Max.
100 m (328 ft)
EW-50
Note
● The relays, DC power supply, and extension cables are not supplied.
● The total length of the lead wire and extension cable should not exceed 100 m (328 ft). (Use an extension cable of 0.3 mm
or thicker.)
● Cut the excess cable near the connector, and insulate the end of the unused cable with tape.
WT07936X05
External power supply
Red
9
Y2
Gray
8
Y1
Blue
7
X2
Yellow
6
X1
Orange
5
1
Max.
100 m (328 ft) *2
External power supply *1 (12 or 24 VDC)
Y2
Y1
X1 X2 Y1 Y2
X2
X1
ON Prohibit
OFF
*2
Use relays X1, X2, Y1, and Y2 that meet the
(12 or 24 VDC)
*1
following specifications.
Demand level 4
Y2
Demand level 3
Y1
Contact rating
Demand level 2
X2
ON/OFF or Emergency
X1
stop
Demand level 1
*1 Select an external power supply suitable for the
*2 Take sufficient precautions against noise when the
Important
● Be sure to use an external power supply (12
Permit
● Connect the external power supply in the
27
Rated voltage: 12 or 24 VDC
Rated current: 10 mA or above
Minimum applied load: DC 1 mA
relays used. (12 or 24 VDC)
Connect the external power supply in the correct
polarity to input and output the signals.
Connect ⑤–⑧ (see the figure at left) to the negative
side.
cable length is long.
or 24 VDC) to avoid malfunctions.
correct polarity to avoid malfunctions.
2