Mackie SP2400 instruction manual Internal Settings, Connecting the RS485 Serial Port, Bus Assign

The REMOTE connector is wired as follows: Pin 1 = Ground (Shield)

Pin 2 = Data + (with +24V DC power) Pin 3 = Data – (with +24V DC power)

Note: See the instructions with the remote control for more information.

Connecting the RS485 Serial Port

This is a 3-pin Phoenix-type connector that follows standard RS485 protocol. Select either a data-grade shielded twisted pair cable or a standard 3-conductor microphone cable for this connection.

The RS485 port is wired as follows: Pin 1 = A (non-inverting I/O)

Pin 2 = G (Ground)

Pin 3 = B (inverting I/O)

The SPLinker Sound Palette Control PC application uses the RS485 serial port to connect between a computer and the SP2400. Connect the PC RS485 port to the first SP2400, and then inter- connect up to 16 SP2400s in the system using their RS485 connections.

Note: It may be necessary to install an RS485 interface card in the PC, or to use an RS232 to RS485 converter.

Since the two RS485 ports are internally connected in the SP2400, one can be used as an input from the previous SP2400, and the other as an output to the next SP2400.

Up to 16 SP2400s can be connected together with 32 independent zones (each zone assigned a unique AMP ADDRESS), or up to 32 SP2400s in stereo operation (each SP2400 assigned the same AMP ADDRESS on both sides, with one side assigned Master and the other side Slave).

To Next SP2400

RS485 RS485

RS485 RS485

Laptop with
SPLinker PC Application	RS485
RS485

Internal Settings

Note: There are several settings that can be changed inside the SP2400. These settings should be made prior to installing the SP2400.

CAUTION: These servicing instructions are for use by qualified personnel only. To

avoid electric shock, do not perform any servicing other than that contained in the Operating Instructions unless you are qualified to do so. Refer all servicing to qualified service personnel. Make sure the power is off and the power cord disconnected before removing the top cover to gain access to the inside of the SP2400.

Bus Assign

There are two 8-position DIP switches on the Input Board that allow you to assign a Program Input source to the balanced expansion bus. Each Program Input Source has four corresponding switches: Left (+), Left (–), Right (+), and Right (–). Typically, you would move all four switches either down (off) or up (assign to expansion bus).

CAUTION: Never assign more than one program source to the same channel on

the Expansion Bus. Assigning sources from more than one SP2400 onto the same bus may damage the unit.

	SP2400 INPUT BOARD
		S1		S2
		8		8
		7		7
		6		6
		5		5
		4		4
S3	S4	3		3	J8	J9	J10	J11	J12
		2		2
	ON	1	ON	1

REAR PANEL

Signal		Switch No.	Signal		Switch No.
Input 1 Left (+)		S1-1	Input 3 Left (+)		S2-1
Input 1 Left (–)		S1-2	Input 3 Left (–)		S2-2
Input 1 Right (+)		S1-3	Input 3 Right (+)		S2-3
Input 1 Right (–)		S1-4	Input 3 Right (–)		S2-4
Input 2 Left (+)		S1-5	Input 4 Left (+)		S2-5
Input 2	Left (–)	S1-6	Input 4	Left (–)	S2-6
Input 2	Right (+)	S1-7	Input 4	Right (+)	S2-7
Input 2	Right (–)	S1-8	Input 4	Right (–)	S2-8

Bus Assign Switch Chart

SP2400 – 13