Nilfisk-ALTO MAC 2.2, MAC 2.3, MAC 2.4 user manual Installation & Connection, 4.1Mains Connection

In this mode, CHA input signal will be output from the bridge output connector, detail wiring diagram you can refer to chapter 5.

13. Fan 13

This fan release the heating from the unit by accelerating the air circulation (air flowing from front to back), and the speed is continuously variable.

4.INSTALLATION & CONNECTION

4.1Mains Connection

Do not insert the power cord into this unit until voltage has been correctly set. Do not plug the power cord into the mains until the voltage has been correctly set. Please ensure that the MAC 2.2/2.3/2.4 Professional Stereo Amplifier is supplied with the correct voltage before turning on this unit. If you can't power up this unit while turning on the Mains Switch (1), please check the Breaker (6) on the rear panel first, maybe it is pressed to reset. Otherwise, contact the technician or qualified personnel for any service.

Caution: To reduce the risk of electric shock, do not perform any servicing other than contained in this manual unless you are qualified to do so. Please turn off this unit before any installation and connection, esp. when you connect your unit into the sound system. This is important to prevent damage to the unit itself as well as other consequent speaker system. The mains connection of the MAC 2.2/2.3/2.4 Professional Stereo Amplifier is made by using the enclosed power cord and a standard IEC receptacle, and it meets all of the international safety certification requirements.

4.2Rack Mounting

The most secure mounting is on a universal rack shelf available from various rack manufactures or your music dealer. The MAC 2.2/2.3/2.4 Professional Stereo Amplifier fits into one standard 19" rack unit of space.Be sure that there is enough air space around the unit for sufficient ventilation. If heat release is inadequate, this unit will retain heat inside, which may cause the protection, or even a fire.

4.3Audio Connection

The LTO MAC 2.2/2.3/2.4 Professional High Power Amplifier presents with balanced XLR connectors and 1/4" TRS phone jack and it can be interfaced by several ways to support a variety of applications without any signal loss.

a.Wiring Configuration

Either the 1/4" TRS (Tip-Ring-Sleeve) phone jack or the XLR servo connector can be wired in balanced and unbal- anced modes, which will be determined by the actual application status, Please wire your systems as the following examples:

For 1/4" Phone jack

+		+		+
		-
Tip	Ring	Tip	Ring	Tip
Sleeve		Sleeve		Sleeve
TS Type Unbalanced	TRS Type Balanced		TRS Type Unbalanced

For XLR connector

Pin2 (+)		Pin2 (+)
	Pin3 (-)
Pin3 (-)
(Linked to Pin1 manually,	)
Pin1 ( )		Pin1 ( )
XLR Type Unbalanced		XLR Type Balanced

b. In Line Connection

For these applications, the MAC 2.2/2.3/2.4 stereo power amplifier provides XLR connectors and 1/4" TRS phone jack to

6