NSW-1 NMEA AUTOSWITCH

The NSW-1 is no longer in production. Please see the NDC-4 which can be used as an Autoswitch.

The Actisense NMEA Autoswitch (NSW-1) from Active Research, allows the data from up to four NMEA (National Marine Electronics Association) input devices to be switched to a single NMEA output, by determining the highest priority device with good data.

The Actisense NMEA Autoswitch (NSW-1) from Active Research, allows the data from up to four NMEA (National Marine Electronics Association) input devices to be switched to a single NMEA output, by determining the highest priority device with good data.

Replace your mechanical changeover switch with the NSW-1 automatic changeover system from Actisense. The intelligent Autoswitch (NSW-1) will guarantee that the best input device is always selected to supply the NMEA data output, automatically choosing the next highest if the current highest priority input device should fail for any reason.

The NSW-1 Autoswitch contains intelligent software that determines the highest priority device based on one of three reasons:

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.

  • A complete failure to send any NMEA data
  • Corrupted NMEA data detected (with checksum calculation)
  • If the validity flag(s) contained within the NMEA data indicate that this data is not valid and should only be used with caution
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

Short term operation (<1 sec)

-15

-35

+15

+35

V

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 protection 2000 V
Baud rate Fixed Baud rate 4800 bps
Data propagation delay

 

 

 

1

 

100

 

msec

 

RS232 in/out
Input voltage tolerance -15 +15 V
Input voltage threshold Logical LOW

Logical HIGH

0.8

1.7

1.2

2.8

V

V

Output resistance Output voltage swing +/-2V 300 ohms
Baud rate Configurable Baud rate 4800 115200 bps
Data propagation delay

 

 

 

1

 

100

 

msec

 

General
Ambient temperature -20 +70 °C

The Actisense NMEA Autoswitch (NSW-1) from Active Research, allows the data from up to four NMEA (National Marine Electronics Association) input devices to be switched to a single NMEA output, by determining the highest priority device with good data.

Replace your mechanical changeover switch with the NSW-1 automatic changeover system from Actisense. The intelligent Autoswitch (NSW-1) will guarantee that the best input device is always selected to supply the NMEA data output, automatically choosing the next highest if the current highest priority input device should fail for any reason.

The NSW-1 Autoswitch contains intelligent software that determines the highest priority device based on one of three reasons:

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.

  • A complete failure to send any NMEA data
  • Corrupted NMEA data detected (with checksum calculation)
  • If the validity flag(s) contained within the NMEA data indicate that this data is not valid and should only be used with caution
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

Short term operation (<1 sec)

-15

-35

+15

+35

V

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 protection 2000 V
Baud rate Fixed Baud rate 4800 bps
Data propagation delay

 

 

 

1

 

100

 

msec

 

RS232 in/out
Input voltage tolerance -15 +15 V
Input voltage threshold Logical LOW

Logical HIGH

0.8

1.7

1.2

2.8

V

V

Output resistance Output voltage swing +/-2V 300 ohms
Baud rate Configurable Baud rate 4800 115200 bps
Data propagation delay

 

 

 

1

 

100

 

msec

 

General
Ambient temperature -20 +70 °C