NDC-4
The Actisense NDC-4 allows up to five NMEA 0183 sources to be multiplexed into a single stream*.
Two flexible ISO-Drive outputs allow two different downstream talker baud rates to be created, ensuring maximum system flexibility.
It provides complete access to all NMEA 0183 data sources, configurable filters to remove unwanted data using NDC Control Centre, as well as enabling an on-board PC to read and add the combined data stream.
Factory preconfigured versions enable the NDC-4 to be used out of the box for AIS operation (NDC-4-AIS). An autoswitch™ option is also available (NDC-4-ASW) to provide redundancy options to your NMEA 0183 network.
*Four inputs on the USB version, as the USB interface acts as the fifth channel, overriding the fifth OPTO input.
Supply (“BATT”) | ||
| Voltage | 8-35 V | |
| Current
|
| 40 mA max @ 12V DC under no load |
Supply (USB) | ||
| Supply voltage | 4.75-5.25 V | |
| Supply current from USB (see note 1) |
| 75 mA max |
Opto-isolated Flexible Input | ||
| Input voltage between +/- | Logical ‘1’/stop bit | -15-0.5 V |
| Logical ‘0’/start bit | 4-15 V | |
| Input current | Maximum is under +35v overload condition, Min @ 2.0v input level | 1.6-9 mA |
| Differential input voltage | Required level for NMEA to be detected | 1.8-2 V |
| Galvanic isolation | Between input & output | 2500 V |
| Overdrive protection | 40 V | |
| Input Baud rate (ports 0 & 1 + USB) | Configurable Baud rate | 4800-115200 bps |
| Input Baud rate (ports 2 & 3) | Configurable Baud rate | 4800-57600 bps |
| Input Baud rate (port 4) | Fixed Baud rate
| 4800 bps |
ISO-Drive Flexible Output | ||
| Output voltage between ISO Out +/A and ISO Out -/B (under no load) | Logical ‘1’ | -4.6 to -5 V |
| Logical ‘0’ | 4.6-5 V | |
| Output current at max load of 100 ohm | At maximum load, differential drive voltage reduces to 2.1v | 21 mA |
| Output short circuit current (note 2) | Due to short circuit protection | 50-55 mA |
| Galvanic isolation | From Opto input and (USB) ground | 1500 V |
| Output Baud rate (ports 0 & 1 + USB) | Configurable Baud rate | 4800-115200 bps |
| Data propagation delay | Under no-overload conditions | 1-100 ms |
General | ||
| Ambient temperature | -20-70 °C | |
| Guarantee | Extended Actisense guarantee | 3 Year |
| Gland clamping range | Cable diameters accommodated | 4.5-10 mm |
| IP Rating | IP66 | |
NDC-4 Vs NDC-5
Feature NDC-4 NDC-5
Inputs (inc. serial port) 5 6
Outputs (inc. serial port) 2 3
Dedicated serial port – Yes
Ethernet port – Yes
Config tool Windows only Any popular web browser on any OS
Basic data filtering Yes Yes
Advanced data routing – Yes
Safe USB connection while powered via a battery – Yes
Pluggable connectors (quicker and easier installation) – Yes
Weather sealed IP66 IP66
