AMX nxc manual NXC-VOL4 Connections/Wiring, NXC-VOL4 Pinouts, Signals, and Functions

NXC-VOL4 Volume Control Card

Pinouts, Signals, and Functions

NXC-VOL4 Pinouts, Signals, and Functions

Pin	Signal	Balanced Function	Unbalanced Function
Channel	1
1	GND	Audio GND	Audio GND
2	Input 1+	Audio IN	Audio IN
3	Input 1-	Audio IN	Audio GND
4	Output 1+	Audio OUT	Audio OUT
5	Output 1-	Audio OUT	no connection
Channel	2
6	GND	Audio GND	Audio GND
7	Input 2+	Audio IN	Audio IN
8	Input 2-	Audio IN	Audio GND
9	Output 2+	Audio OUT	Audio OUT
10	Output 2-	Audio OUT	no connection
Channel	3
11	GND	Audio GND	Audio GND
12	Input 3+	Audio IN	Audio IN
13	Input 3-	Audio IN	Audio GND
14	Output 3+	Audio OUT	Audio OUT
15	Output 3-	Audio OUT	no connection
Channel	4
16	GND	Audio GND	Audio GND
17	Input 4+	Audio IN	Audio IN
18	Input 4-	Audio IN	Audio GND
19	Output 4+	Audio OUT	Audio OUT
20	Output 4-	Audio OUT	no connection

NXC-VOL4 Connections/Wiring

The NXC-VOL4 card contains four audio volume control channels.

Each line-level channel is isolated from system ground and can be configured for balanced or unbalanced line operation. It supports programmable audio levels, audio mute, variable ramp speeds, and preset levels.

Each audio channel's input to output gain ratio is adjustable via the on-board jumpers shown in FIG. 8 on page 35.

Audio Channel Gain Ratio Jumper Settings

Unity	jumper not installed
Gain	-10 dB Input level/+4 dB Output level setting on pins 1 and 2
Attenuate	+4 dB Input level/-10 dB Output level setting on pins 3 and 4

36 NetLinx Cardframe, Control Cards, and NetModules - Operation Reference Guide