Actisense NDC3 USB

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Actisense NDC-3b-USB NMEA combiner multiplexer
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Actisense MArine Electronics
NDC-3B-USB
NMEA Combiner / Multiplexer

The Actisense™ NMEA Multiplexer / Combiner with USB allows connection of up to four NMEA (National Marine Electronics Association) inputs to be multiplexed / combined in to one NMEA output.

This approach offers these major advantages:

enables the vessel owner complete access to all NMEA data sources, instead of the standard one device,
each NMEA input device is Opto-isolated from all other NMEA device in the system,
significant reductions in installation cost (from reduced cable lengths and requiring only one NMEA cable to be routed around the bridge to supply the multiplexed NMEA data.

Electrical spike protection is provided as standard on all four input channels using opto-isolators. This protects any connected equipment from most system faults; a particularly valuable benefit as equipment requiring the most data, such as a PC or chart plotter, is often the most expensive to repair or replace.

The NDC-3 Data Multiplexer contains intelligent software that manages the multiplexing operation, allowing every input to have a chance of its data reaching the combined NMEA output. Tested up to and beyond a combined 200% loading of the four inputs.

Part No.

Description (Click to view & order)

Price

pysNDC3BUSB

Specifications

Parameter	Description	Min.	Max.	Unit
Supply voltage		8	35	V
Supply current	Supply voltage 12v (no load)	26	30	mA
	Supply voltage 24v (no load)	16	18	mA
NMEA in/out
Input voltage tolerance	Continuous operation	-15	+15	V
	Short term operation (< 1 sec)	-35	+35	V
Differential input voltage	Required level for data to be detected	1.8	-	V
Output current	RS485 / RS422 compatible	-	32	mA
Input to output protection	Full Galvanic Opto-isolation	-	2000	V
Baud rate	Fixed Baud rate	-	4.8	kbit/sec
Data propagation delay		1	100	msec
RS232 in/out
Input voltage tolerance		-15	+15	V
Input voltage threshold	Logical LOW	0.8	1.2	V
	Logical HIGH	1.7	2.8	V
Output resistance	Output voltage swing +/- 2V	300	-	ohms
Baud rate	Fixed Baud rate	-	38.4	kbit/sec
Data propagation delay		1	100	msec
USB interface
Interface version	v1.1 (compatible with v2.0)
General
Ambient temperature		-20	+70	°C

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