Mitsubishi Electric PURY-WP-YJM-A Data Book page 147

3. System remote controller
2. Wiring Instructions
(1). Connecting the Power and M-NET Transmission Lines
Connect the M-NET transmission line of this device to a power
supply unit (PAC-SC51KUA) for the transmission line or an outdoor
unit (either a centralized control line or indoor control line can be
connected).
* Only the M-NET circuitry of this device receives the power from the
M-NET transmission line. The power consumption factor is "1/4"
(equivalent to one ME Remote Controller).
Field
R
Connections
(example)
AC Power Line
Uninterruptible
power supply
(UPS)
S
• Use a power line and M-NET transmission line that satisfy the specifications described in "1-(2). Parts
Purchased Separately".
• Attach a circuit comprising the following components to the supply primary side of the 24 VDC power supply.
(1) Varistor, (2) Arrester, (3) Noise filter, (4) Fuse
• It is important to pay attention to the polarity when connecting to the 24 VDC power supply terminal block.
Connecting the positive and negative in the reverse order will cause a failure.
CAUTION
• Fix the power line and M-NET transmission line in place on the outside to ensure that the terminal block is not
affected by any external force.
Not securely connecting and fixing the wires in place may cause heat generation and fire.
• Make sure that the copper wiring is not short-circuiting the plates (cover, lower case) or neighboring wires.
Cover the shielded line of the M-NET transmission line with materials such as vinyl tape and prevent
short-circuiting with the plates.
Tightening torque for terminal screws: 1 N·m
M-NET
Fuse
Arrester
Varistor
Varistor
U U
U U
CONTROLLER
CN17
A/B/S
PI controller
24 VDC
24 VDC
Power
Noise
Power
Noise
source
Filter
source
Filter
FG FG
CN16
V+/V-/ FG
* Func ional t
ground
3 - 62