AMX specifications NXC-VAI4 Analog Voltage Control Card, Pinouts and Functions

Installation Guide

NXC-VAI4Voltage Output/Analog Input Card

NetLinx Control Cards and NetModules

NetLinx Control Cards can be installed in either the NXF CardFrame, NI-4000, or NetModules. This document provides basic specifications and wiring information for the NetLinx Control cards. For detailed information on the cards, refer to the NetLinx CardFrame, Control Cards, and NetModules Instruction Manual available on-line via www.amx.com.

NXC-VAI4 Analog Voltage Control Card

The NXC-VAI4 Analog Voltage Control Card (FG2025) provides 4 independent analog-to-digital inputs and four independent digital-to-analog outputs, which are controllable over the ICSP network. Each port can be configured for a variety of DC input and output signals. The NXC-VAI4 incorporates the functionality of the AXC-VAI2 and AXC-VRG AXlink cards.

NXC-VAI4 Specifications

Power Requirements:	330 mA @ 12 VDC
Inputs:	Four high-impedance analog DC inputs.
Outputs:	Four analog DC outputs (user-configurable).
D/A, A/D conversion:	0-bit A/D and D/A converters for analog sampling and
	control.
Available input voltages:	0 V to +12 V.
Available output voltages:
-12 V to +12 V:	The output voltage may be software-configured for any min
	and max levels between -12 and +12 VDC.
	•	Maximum output current = 60 mA per output.
	•	Over-voltage protection to +28 VDC.
External reference:	A user supplied external reference voltage can be used to
	set the maximum voltage range for the D/A outputs. The full
	analog output range is scaled to fit the maximum range set
	by the external reference.
	Output voltage may be set to any level between 0-12 VDC,
	referenced to the external reference voltage input and the
	NXC-VAI4 power supply GND.
External reference input:	Maximum external reference input voltage = +12VDC.
(EREF, 1 for each output)	Over-voltage protection to +28 VDC.
Internal reference output:	+5 V reference output, maximum current = 60 mA.
(IREF)	This output is intended to drive a ground-referenced load.
I/O Status LEDs 1-8:	LEDs light to indicate ON status.
(two LEDs per channel)	4 yellow LED's (one per channel) light to indicate input signal
	changes reported to the Master.
	4 red LED's (one per channel) light to indicate output signal
	changes. Output LEDs blink to indicate that the power-up or
	limit levels have not been set.
	•	LED 1: Output #1 (red)
	•	LED 2: Input #1 (yellow)
	•	LED 3: Output #2 (red)
	•	LED 4: Input #2 (yellow)
	•	LED 5: Output #3 (red)
	•	LED 6: Input #3 (yellow)
	•	LED 7: Output #4 (red)
	•	LED 8: Input #4 (yellow)
Wiring:	Captive-wire connectors.
Device ID:	0x010D
Firmware ID:	•	0x0113 (Download)
	•	0x0114 (Boot)

Pinouts and Functions:

NXC-VAI4 Pinouts, Signals, and Functions

Pin	Function	Pin	Function	Pin	Function
1	Output #1 (GND)	9	Input #1 (GND)	17	+5	V Reference output (GND)
2	Output #1	10	Input #1	18	+5	V Reference output
3	Output #2 (GND)	11	Input #2 (GND)	19	External Reference input (GND)
4	Output #2	12	Input #2	20	External Reference input
5	Output #3 (GND)	13	Input #3 (GND)
6	Output #3	14	Input #3
7	Output #4 (GND)	15	Input #4 (GND)
8	Output #4	16	Input #4

Channel Assignments:

Off = 50% voltage, and all channel assignments are mutually exclusive. Note: PU, PN and PX must be set for all eight levels before using the card.

NXC-VAI4 Channel Assignments

Channel	State	Function
Channel 1	ON	While channel 1 is ON, the voltage on Output 1 will ramp up at the
		"CURRENT OUTPUT 1 RAMP UP TIME" rate. The voltage ramp
		stops if the maximum is reached.
	OFF	Stops voltage ramping on Output 1 at current value.
Channel 2	ON	While channel 2 is ON the voltage on Output 2 will ramp up at the
		"CURRENT OUTPUT 2 RAMP UP TIME" rate. The voltage ramp
		stops if the maximum is reached.
	OFF	Stops voltage ramping on Output 2 at current value.
Channel 3	ON	While channel 3 is ON the voltage on Output 3 will ramp up at the
		"CURRENT OUTPUT 3 RAMP UP TIME" rate. The voltage ramp
		stops if the maximum is reached.
	OFF	Stops voltage ramping on Output 3 at current value.
Channel 4	ON	While channel 4 is ON the voltage on Output 4 will ramp up at the
		"CURRENT OUTPUT 4 RAMP UP TIME" rate. The voltage ramp
		stops if the maximum is reached.
	OFF	Stops voltage ramping on Output 4 at current value.
Channel 5	ON	While channel 5 is ON the voltage on Output 1 will ramp down at the
		"CURRENT OUTPUT 1 RAMP DOWN TIME" rate. The voltage
		ramp stops if the minimum is reached.
	OFF	Stops voltage ramping on Output 1 at current value.
Channel 6	ON	While channel 6 is ON the voltage on Output 2 will ramp down at the
		"CURRENT OUTPUT 2 RAMP DOWN TIME" rate. The voltage
		ramp stops if the minimum is reached.
	OFF	Stops voltage ramping on Output 2 at current value.
Channel 7	ON	While channel 7 is ON the voltage on Output 3 will ramp down at the
		"CURRENT OUTPUT 3 RAMP DOWN TIME" rate. The voltage
		ramp stops if the minimum is reached.
	OFF	Stops voltage ramping on Output 3 at current value.
Channel 8	ON	While channel 8 is ON the voltage on Output 4 will ramp down at the
		"CURRENT OUTPUT 4 RAMP DOWN TIME" rate. The voltage
		ramp stops if the minimum is reached.
	OFF	Stops voltage ramping on Output 4 at current value.
Channel 9	ON	Reserved [do not use].
	OFF	Reserved [do not use].
Channel 10	ON	While channel 10 is ON the voltage on Output 1 is set to 100%.
	OFF	Sets Output 1 voltage to 50%.
Channel 11	ON	While channel 11 is ON, the voltage on Output 2 is set to 100%.
	OFF	Sets Output 2 voltage to 50%.
Channel 12	ON	While channel 12 is ON, the voltage on Output 3 is set to 100%.
	OFF	Sets Output 3 voltage to 50%.
Channel 13	ON	While channel 13 is ON, the voltage on Output 4 is set to 100%.
	OFF	Sets Output 4 voltage to 50%.
Channel 14	ON	While channel 14 is ON, the voltage on Output 1 is set to 0%.
	OFF	Sets Output 1 voltage to 50%.
Channel 15	ON	While channel 15 is ON, the voltage on Output 2 is set to 0%.
	OFF	Sets Output 2 voltage to 50%.
Channel 16	ON	While channel 16 is ON, the voltage on Output 3 is set to 0%.
	OFF	Sets Output 3 voltage to 50%.
Channel 17	ON	While channel 17 is ON, the voltage on Output 4 is set to 0%.
	OFF	Sets Output 4 voltage to 50%.
Channel 18	ON	While channel 18 is ON, the voltage on Output 1 is set to 75%.
	OFF	Sets Output 1 voltage to 50%.
Channel 19	ON	While channel 19 is ON, the voltage on Output 2 is set to 75%.
	OFF	Sets Output 2 voltage to 50%.
Channel 20	ON	While channel 20 is ON, the voltage on Output 3 is set to 75%.
	OFF	Sets Output 3 voltage to 50%.
Channel 21	ON	While channel 21 is ON, the voltage on Output 4 is set to 75%.
	OFF	Sets Output 4 voltage to 50%.
Channel 22	ON	While channel 22 is ON, the voltage on Output 1 is set to 25%.
	OFF	Sets Output 1 voltage to 50%.
Channel 23	ON	While channel 23 is ON, the voltage on Output 2 is set to 25%
	OFF	Sets Output 2 voltage to 50%.
Channel 24	ON	While channel 24 is ON, the voltage on Output 3 is set to 25%
	OFF	Sets Output 3 voltage to 50%.
Channel 25	ON	While channel 25 is ON, the voltage on Output 4 is set to 25%
	OFF	Sets Output 4 voltage to 50%.