Actisense NDC-4 NMEA Multiplexer
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Flexible multiplexing with preconfigured versions for Autoswitching or AIS operation.
The Actisense NDC-4 NMEA Multiplexers is flexible and powerful enough to be the heart of a simple system, or one of many Actisense products in a more complex system. It provides complete access to all NMEA 0183 data sources, configurable filters to remove unwanted data, as well as enabling an on-board PC to read and add the combined data stream.
The Actisense NDC-4 and NDC-4-USB allow up to five OPTO isolated NMEA 0183 sources to be multiplexed into a single stream. Factory preconfigured versions enable the NDC-4 to be used out of the box for AIS operation (NDC-4-AIS) or as an Autoswitch (NDC-4-ASW). Two flexible ISO-Drive outputs allow two different downstream talker baud rates to be created, ensuring maximum system flexibility.
Actisense NDC-4 NMEA Multiplexers Features:
- 5 OPTO-Isolated NMEA 0183 Data Inputs allowing the input to
work correctly with long cable runs, and/or in a noisy
environment
- 2 ISO-Drive Flexible Outputs fully compatible with the RS422
(NMEA 0183), RS485 and RS232 connections on the NMEA listening
device(s) the NDC-4 supplies data to, and offers total galvanic
isolation of up to 1500v between the output and ground
- NMEA and PC (USB/ISO-Drive) Outputs
- Powerful Processor - the ARM 32-bit microcontroller is capable
of 40 million instructions per second, with very large NMEA data
buffers to allow smoothing of short-term peaks in the NMEA data
flow
- Flash Upgradeable
- Combine Mode: Intelligent Software filters the valid data from
all active inputs, using the configured Inclusion lists, and then
combines the remaining data using a simple priority system
- Autoswitch Mode: Intelligent Software determines the highest
priority device with valid data
- Very Low Current Consumption - ideal for small vessels with
small batteries.
- Diagnostic Tri-Colour LED that indicates current operation
mode, volume of data being multiplexed, or if a hardware fault has
been detected
- IP66/IP68 Case and Gland Design - a very robust polycarbonate
case with a high waterproof certification
- High Quality Angled Screw Terminals that make cable installation a simple and quick operation
Actisense NDC-4 NMEA Multiplexers Specifications:
| Parameter | Description | Min. | Max. | Unit |
|---|---|---|---|---|
| Supply voltage | 10 | 35 | V | |
| Supply current | Supply voltage 12v (no load) - 360mWatts | 32 | 34 | mA |
| Supply voltage 24v (no load) | 17 | 18 | mA | |
| Opto-isolated in | ||||
| 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 |
| Input current | - | 2 | mA | |
| Input to ground | Full Galvanic Opto-isloation protection | - | 2500 | V |
| Baud rate | In 0-3: Independant configurable baud rates | 4800 | 57600 | bps |
| Data propagation delay | Time taken from input to output | 1 | 100 | msec |
| ISO-Drive out | NMEA 0183 version 1-3 and PC Serial | |||
| Output current | RS485/RS422/RS232 compatible | - | 22 | mA |
| Diferential output voltage | 100 ohm load | 2.1 | - | V |
| Output to ground | Full Galvanic isolation protection | - | 1500 | V |
| Output to output | Full Galvanic isolation protection | - | 1500 | V |
| Baud rate | Out 0-1; Independant configurable baud rates | 4800 | 115200 | bps |
| USB interface | NDC-4-USB only | |||
| Interface version | USB v1.1 (fully compatible with USB v2.0) | |||
| General | ||||
| Ambient temperature | -20 | +70 | degreesC | |
| Guarantee | Actisense guarantee | - | 3 | Years |
| Gland clamping range | Cable diameters accommodated | 4.5 | 10 | mm |
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