Mitsubishi Electronics PAC-YG63MCA Connecting the Power and M-NET Transmission Lines, Net

7-2. Connecting the Power and M-NET Transmission Lines

		Tightening torque for terminal screws: 1 N·m
Connect the M-NET transmission line of this device to a power
supply unit (PAC-SC50KUA) for the M-NET transmission line
or an outdoor unit (either a centralized control line or indoor
control line can be connected).							CN02
* Only the M-NET circuitry of this device receives the power from the								A/B/S
M-NET transmission line. The power consumption factor is "1/4"
(equivalent to one ME Remote Controller).
				/ A	(M1)
					(M2)
				B/
			M-NET
				S
Field
Connections	R
(example)			Fuse			Arrester
AC power Line			Varistor			Varistor	Noise
			U				Filter
					U
	S

AI controller

24VDC

Power source

FG

V+/V-/FG

*Functional ground

Figure 7-1 Example of Connecting the Power Line and M-NET Transmission Line

Caution:

•Use a power line and M-NET transmission line that satisfy the specifications described in "6-1. 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.

•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.

Note:

•If the M-NET transmission line of this device is connected to an M-NET indoor control line and the outdoor unit is down because, for example, the power supply is interrupted for servicing or there is a failure, the AI controller cannot be set and monitored from the system controller.

•Be sure to ground this device, PAC-SC50KUA and 24 VDC Power source. Measurement accuracy may be affected if devices are not grounded.

7