Mitsubishi Electric EW-50A, Installation And Instruction Manual

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WT07936X05
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
X1
X2
Y1
Y2
9
8
7
6
5
1
X1
X2
Y1
Y2
Use relays X1, X2, Y1, and Y2 that meet the
following specifications.
Contact rating
Rated voltage: 12 or 24 VDC
Rated current: 10 mA or above
Minimum applied load: DC 1 mA
*1 Select an external power supply suitable for the
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.
*2 Take sufficient precautions against noise when the
cable length is long.
Important
● Be sure to use an external power supply (12
or 24 VDC) to avoid malfunctions.
● Connect the external power supply in the
correct polarity to avoid malfunctions.
(B) Pulse signal
CN5
X1
X2
Y1
Y2
X1 X2 Y1 Y2
9
8
7
6
5
1
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
2
or thicker.)
● Cut the excess cable near the connector, and insulate the end of the unused cable with tape.
ON/OFF or Emergency
stop
Demand level 1
Red
Orange
Max.
100 m (328 ft) *2
EW-50
Yellow
Blue
Gray
External power supply *1 (12 or 24 VDC)
Demand level 2
Demand level 3
Demand level 4
Permit
Prohibit
OFF
ON
External power supply *1 (12 or 24 VDC)
Red
Gray
Blue
Yellow
Orange
Max.
100 m (328 ft)
*2
EW-50