McIntosh C45 owner manual Important Information, Connector Information

Black (RF)

Data Signal N/C

Ground

Data Signal N/C

Data Ground

IR Input Port Connector

Data Port Connector

Pin 2

Pin 1

Pin 3

Important Information

1.It is recommended that a qualified professional assist you in the choice and installation of a McIntosh Audio System for your home.

2.Before making any connections to the C45, make sure that the Main POWER Switch is in the Off position. When the C45 and other McIntosh Components are in their Standby Mode the Microprocessor’s Circuitry inside each component is active and communication is occurring between them. Failure to do so could result in malfunctioning of some or all of the system’s normal operations.

3.The optional McIntosh TM1 AM/FM Tuner Module can be added to the C45 Audio Control Center. The TM1 is available from your McIntosh Dealer and can be installed at any time, usually while you wait. Refer to page 27 for additional information on the TM1.

4.The following Connecting Cable is available from the McIntosh Parts Department:

Data and Power Control Cable Part No. 170-202

Six foot, 2 conductor shielded, with two 1/8 inch stereo mini phone plugs.

5.For additional connection information, refer to the owner’s manual(s) for any component(s) connected to the C45.

6.Up to four McIntosh Sensors or Keypads can be wired in parallel for remote operation.

7.When a McIntosh WK-2 Keypad or a R649 Sensor is to be connected to the McIntosh C45 Audio Control Center that uses a RJ-45 Connector Plug instead of the “F” Coax Connector, connect the Center Conductor to Pin 1 and the Shield Conductor to Pin 2. Refer to the illustration below.

Shielded Cable Data Signal		Pin 1	Pin 8
	(to Pin 1)
“F” Connector	Data Ground	RJ-45
	(to Pin 2)	Plug

8.The Power Control Signal present at the ACC(B) Jack is controllable by either using the ACC ON or ACC OFF Push-buttons on the Remote Control or by assignment when in the Setup Mode. For additional information refer to page 19 “Power Control Triggers” in this manual.

9.Balanced and Unbalanced Inputs and Outputs can be mixed. For example, you may connect signal sources to Unbalanced Inputs and send signals from the Balanced Outputs. You can also use Balanced and Unbalanced Outputs simultaneously, connected to different Power Amplifiers.

10.Sound Intensity is measured in units called Decibels and “dB” is the abbreviation.

Connector Information

XLR Connectors

Below is the Pin configuration for the XLR Balanced Input and Output Connectors on the C45. Refer to the diagram for connection:

PIN 1: Shield/Ground

PIN 2: + Signal

PIN 3: - Signal

Power Control and Trigger Connectors

The C45’s Power Control Outputs provide a 5 volt signal. Use a 1/8 inch stereo mini phone plug to

connect to the Power Control Input on	Positive
other McIntosh Components.	N/C
	Ground

Data and IR Port Connectors

The C45’s Data Port Output provides Remote Control Sig- nals and the IR Input

Port allows for the con- nection of other brands IR Sensors. Use a 1/8 inch stereo mini phone plug to connect to the Data Port Inputs on McIntosh Source Units.

Keypad Terminal Connector

To use a WK-3 or WK-4 Keypad with the C45, connect the shield and four leads of a shielded 4 conductor cable to a RJ-45 Connector Plug, according to the numbers listed be- low. There is a numbered connector built-in to each Keypad, which has a different pin out.

C45 RJ-45	WK-3 and WK-4 Keypad
1. Signal Data	1. Supply Voltage Positive
2. Signal Data Gnd.	2. Supply Voltage Negative
and Cable Shield	3. Cable Shield
3. N/C	4. Signal Data
4. Supply Voltage Negative	5. Signal Data Gnd

5.Supply Voltage Positive

6.N/C C45

7. N/C	Keypad
8. N/C	Socket

RAA1 Connector

Connect the shield and two leads of a shielded 2 conductor cable to the supplied 5 Pin Termi-

nal Connector Plug. Refer to the Red (TV) Green (GND) connection information on the top

cover of the RAA1.

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