General Ports

Universal Input port

The universal Input of the NSA-004A, NSA-006A and NSA-007A combines an analog and a digital input. In auto mode it recognizes whether a digital or an analog signal is connected and switches the configuration accordingly.

Pin	Signal
1	GND
2	Hot (+)
3	Cold (-)

• The analog pre-amp with high dynamic range can handle low sensitivity dynamic microphones as well as high line levels.

• In Auto mode, phantom power (48 VDC, 10 mA) is automatically activated when a condenser microphone is detected.

• The analog input for line level works with an input level of max. +24 dBu.

• The user can select between various common reference levels.

• A limiter protects the input once the input voltage reaches a level of 2.7 Vpp.

• In digital mode a Sample Rate Converter is integrated for AES3 Signals.

Univeral Output port

The universal output of the NSA-005A, NSA-006A and NSA-007A combines an analog and a digital output which is user selectable. The operating mode must be set via the Audio I/O web interface.

Pin	Signal
	balanced	unbalanced
1	GND	GND / Cold (-)
2	Hot (+)	Hot (+)
3	Cold (-)	GND / Cold (-)

• The analog output is trafo-symmetrical and supports balanced and unbalanced connections.

• The output is short circuit protected.

• User can select between various common reference levels that changes output analog gain for the best possible signal to noise ratio at all settings.

• The analog output has an output level of max. +24.1 dBu.

• For the trafo-isolated AES3 output the sample rate corresponds to the system clock.

• For unbalanced connections, either the + or the - can be connected to GND.

GPI port

The GPI port of the NSA-003A, NSA-006A and NSA-007A provides 3 individual isolated general purpose inputs and a current limited auxiliary output voltage on a robust D-Sub connector.

Pin	Signal	Pin	Signal
1	GP-IN1-P	6	GP-IN1-N
2	GP-IN2-P	7	GP-IN2-N
3	GP-IN3-P	8	GP-IN3-N
4	GPIO +5V	9	GND
5	not connected	Chassis	Chassis

• The input voltage range of the GPI inputs is +5 to +48 VDC (~5 mA constant current limit).

• The input voltage must not exceed 51 VDC.

• The polarity of the inputs is important. The higher potential must be connected to “P”.

• The inputs are galvanically isolated.

• The switching thresholds are 2.5 VDC max. for the OFF state and 3.5 VDC min. for the ON state.

• The maximum current of the two "GPIO +5V" auxiliary output voltages (GPI and GPO port) together is 50 mA (protected by self-resetting fuse).

GPO port

The GPO port of the NSA-003A, NSA-006A and NSA-007A provides 3 individual isolated multi-purpose outputs and a current limited auxiliary output voltage on a robust D-Sub connector.

Pin	Signal	Pin	Signal
1	GP-OUT1-P	6	GP-OUT1-N
2	GP-OUT2-P	7	GP-OUT2-N
3	GP-OUT3-P	8	GP-OUT3-N
4	GPIO +5V	9	GND
5	not connected	Chassis	Chassis

The maximum GPO output contact rating is 300 mA, 48 VDC (protected by self-resetting fuse).

• The polarity of the output has no preference.

• The outputs are galvanically isolated.

• The maximum current of the two "GPIO +5V" auxiliary output voltages (GPI and GPO port) together is 50 mA (protected by self-resetting fuse).

USB Type-C port

The USB-C port (USB 2.0) of the NSA-003A, NSA-004A, NSA-005A, NSA-006A and NSA-007A functions as device mode (future option: host mode). The device is compatible with the USB audio specification with two input and two output channels.

Ethernet Management port

All NSA types allow the user to set up out-of-band control via the 10/100/1000Base-T management port (MGNT), e.g. if a separate network is required for control.

Pin	Signal	Standard color
1	TxRx A +	orange/white
2	TxRx A -	orange
3	TxRx B +	green/white
4	TxRx C +	blue
5	TxRx C -	blue/white
6	TxRx B -	green
7	TxRx D +	brown/white
8	TxRx D -	brown

Ethernet Media / PoE ports

All NSA types offer two Gigabit media ports on rugged Neutrik etherCON connections, which are also used to supply the device via PoE+. The media ports can be configured individually or as a daisy chain.

Pin	Signal	PoE	Standard color
1	TxRx A +	DC +	orange/white
2	TxRx A -	DC +	orange
3	TxRx B +	DC -	green/white
4	TxRx C +	--	blue
5	TxRx C -	--	blue/white
6	TxRx B -	DC -	green
7	TxRx D +	--	brown/white
8	TxRx D -	--	brown