Data Multiplexer

DM44

4 in · 4 out · RJ45 Network

The DM44 is a 4-input, 4-output data multiplexer with a network interface. It is designed to assist with the total integration of electronic equipment in the wheelhouse. With the increase in numbers and types of equipment generating serial data within a vessel, the need to combine and filter this data is necessary. The DM44 is fully isolated, providing full DC isolation between input supply, ground, and outputs.

Features

Furuno CIF conversion
Filtering of NMEA sentences by Talker or Formatter for each input and output
Flexible multiplexing from one port to any other
NMEA 0183 In or Out talker modification
NMEA / CIF depth sentences from trigger and bottom or JRC trigger/clock/data
AD10 data from NMEA: VTG, VHW, HDG, HDM, HDT, etc.
100, 200, 400 or 800 PPNM to and from VTG/VHW
Alarm outputs (2) when defined inputs received — depth, waypoint, DGPS, etc.
User-selectable baud rate, stop bits, parity, data bits, start/stop characters
Baud rates up to 115200 enabling fast data transfer
Automatic prioritised dual / tri input switching (GPS, sounder, heading)
NMEA sentence rate control (increase / decrease)
Many other conversions available on customer request

Configuration

Device configuration is done using the DMxxConfig program supplied, running on a Windows PC connected to the DM44 via the Ethernet port.

DM44 front panel

Specifications

Input requirements

Serial: Current loop, RS422, RS232
Digital: 0/5 V for Trig / Bottom / Selector

Output capabilities

Current loop, RS422, RS232 — each port
4 × 100 mA current sink for PPNM / AD10 / Alarms

Power requirements

11–35 VDC @ 50–150 mA
Full DC isolation between supply & outputs

Configurable parameters

Format type (NMEA etc.)
Modify talker IN and OUT (GP, LC, II)
Port to port transfer
Filtering, etc.

Physical parameters

Enclosure	Plastic with RFI shield, polished stainless top
LED indicators	Power ON, Data In and Data Out each port
Mounting	Bulkhead or desktop
Weight	300 grams
Dimensions	85 × 112 × 37 mm
Connectors	4 × DB9 (In/Out) · 1 × RJ45 (Network) · 1 × 2-pin power cord in-line

Download manual (PDF) Download flyer (PDF)

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