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IS42J Digital Gauge

SKU: 000-14479-001

This 4.1-inch colour display offers a clear view of engine status and performance for up to two J1939 diesel engines. More than a standalone gauge, the IS42J also bridges the gap between those engines and your boat’s NMEA 2000® network. This enables engine monitoring from other Simrad gauges and displays.

Product details

Dual-Engine Display
The IS42J offers customisable views of engine status and performance data, for up to two J1939 diesel engines. View engine speed, load, pressures, temperatures, alerts (including diagnostic trouble codes), and other key data on one clear graphical display. Designed for use in all conditions, the IS42’s full-colour display panel is optically bonded to its protective glass covering; this eliminates the possibility of condensation or fogging within the display. Simple, waterproof controls make the IS42 easy to use in rough conditions, and reliably responsive to wet or gloved hands.

Built-in J1939 to NMEA 2000® Gateway
More than a standalone gauge, the IS42J also links your J1939 diesel engines to your boat’s NMEA 2000® network. This lets you view engine data on a wide range of other Simrad gauges and multifunction displays vessel-wide, without the need for a separate J1939 gateway or converter.

Easy Installation
The IS42J is simple to install, with one cable to each of your engines and a single connection to your boat’s DC power supply. With a dual-engine J1939 gateway built in, there are no separate “black-box” components to install. Plug-and-play adaptor cables are available to suit a wide range of J1939 diesel engines. Sharing engine data with other Simrad gauges or displays is also simple, with industry-standard NMEA 2000® connectivity.

Key Features

  • Bright, optically bonded 4.1-inch colour display
  • Monitor up to two J1939 connected engines
  • Built-in J1939 to NMEA 2000® gateway
  • Intuitive operation with waterproof silicon keys
  • Easy to install and configure
  • Low-profile glass helm design

What's in the box?

  • N2K-T-RD Network T-Connector
  • N2KEXT-2RD 2ft Network Extension Cable
  • Install kit for Triton² / IS42
  • IS42 Sun Cover


Backlight Color
White, Red, Green, Blue
Display Resolution
320 x 240, 4:3
Compass Safe
300mm (1.0')
Dimensions W x H x D
118 x 115 x 37mm (4.6 x 4.5 x 1.4")
Mounting Type
0.32 kg (0.7 lbs)
Power Consumption max
Power Consumption typical
Recommended Fuse Rating
Supply Voltage
12V DC (10-16V DC)
Up to 95% RH
Operating Temperature Range
-25 to +65ºC (-13ºF to +149ºF)
Storage Temperature Range
-40 to +85ºC (-40ºF to +185ºF)
Receive: 59392,59904,60928,126208,126992,126996,127488,127489,127505,127508,128259,128267,129025,129026,129029,129033,130136 Transmit: 59904, 60928, 126208, 126996, 127258
NMEA 2000 Connectivity
1 x NMEA2000 Micro-C port, 1 LEN
Approvals Compliance
IEC/EN 60945
English, French, Spanish, German, Italian, Swedish, South African, Danish, Finnish, Icelandic, Dutch, Norwegian, Portugues, Greek
Warranty Period
2 Years

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