Combination Output Interface (COI) With Connectors | 80-911-0119-00

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Combination Output Interface (COI) with connectors

 The Complete czone system in a simple box designed for manufacturers, installers, special purpose vehiclesand also those of you like to DIY, 

No more complicated cables to switch and fuse panels, the COI will replace all of it via it's innovative interface and light weight NMEA 2K network cabling. It is the perfect solution for users wanting automation and complete control of their electrical system and gives them the ability to pin point any issues found on today's on board systems. 

The Combination Output Interface (COI) incorporates multiple input and output devices in to one module, offering a compact and intelligent replacement for traditional DC fuse boxes and circuit breaker panels with digital switching technology.

Mastervolt is a pioneer in digital switching, a proven CANbus technology where a single data cable is used to operate clusters of switches. Provides a high density 30 channel module which minimizes installation, interconnections and footprint, while delivering best value per circuit.

Easy installation

The COI features the same proven, rugged CZone design including IPX5 water ingress protection and complete mechanical fuse plus bypass on all circuits as required by ABYC/CE. Industry standard Deutsch connectors provide "plug and play" installation.

The COI is essentially a complete CZone® system in a single, rugged housing, making it a cost effective solution where space and budgets are limited. By using fewer connection points along with industry-standard ‘plug & play’ Deutsch connectors, the COI is very easy to install.

A USB port has been added to improve remote serviceability and allow for easy upgrades, whilst a high power 150-amp unit fields enough energy for modern domestic appliances that may run through the electrical system.

Quick access and overview

A CZone touchscreen is used to operate the system centrally, and as the ABYC and CE safety authorities require every circuit to have both a fuse and a bypass, this is provided within the COI. Each ATC fuse can be simply withdrawn to isolate a circuit, and pushed into a different position to create a bypass. To aid identification of the individual fuses, an adhesive circuit label is available, which is printed to a customer’s exact requirements. A clear plastic cover protects the fuses, although a large clipping system provides fast access. Red and green LEDs indicate a circuit’s status at a glance.

Partnered with either a dedicated CZone display, or with a multi functional display from one of our industry leading integration partners (B&G, Furuno, Garmin, Lowrance, Simrad), the COI heralds a new era in providing simple, intuitive control over the increasingly complex systems found on today’s applications.

Multiple protection

The Combination Output Interface has multiple layers of protection provided by software, hardware and mechanical means for ultimate reliability. The casing is built to the IPX5 water ingress standard. An optional cable cover is available to hide the cable glands.

Other features include high power pump channels to allow manual control, plus ‘pump running’ feedback, from a single channel without the need for additional wiring. In addition, the COI provides six digital switch inputs (wiper, horn, etc.), eight analogue inputs (starter battery, fuel gauge sender, etc.) twelve low current (10 A) outputs (courtesy lights, anchor light, etc.) and four high current (25 A) outputs (bilge and water pumps). 


There is also a Combination Output Interface without connectors available for refit or service purposes.


General specifications
Communication protocol NMEA 2000
Channels 30
Output channels (high) 4 x 25 A
Output channels (low) 12 x 10 A (dimmable)
Analogue inputs 8 (positive or negative switching, 0-32 V), 0-1000 Ohm resistance, 4-20 mA current
Additional monitoring 2 voltage sensors (on main positive stud and NMEA 2000 power)
Circuit current monitoring all 16 output channels
Circuit protection configurable electronic fuse + mechanical fuse and bypass
Digital switch inputs 6 digital input switches with backlight via digital breakout
Max. continuous current 150 A at 40 °C (derating > 40 °C)
NMEA 2000 power consumption 250 mA at 12 V, 180 mA at 12 V standby
Connectors Deutsch
Power supply M8 (5/16”) stud positive, M6 (1/4”) stud negative
Voltage 9-32 V (with power available LED and voltage monitoring)
Bilge pump circuits 4 high current channels: integrated manual control and 'pump running' detection
Protection degree IPx5 (mounted at 0° +/- 90°)
Dimensions (incl. optional cable cover), hxwxd 338 x 235 x 62 mm
13.3 x 9.3 x 2.4 inch
Weight 1.9 kg
4.2 lb
Approvals CE, ABYC, NMEA

Click the links below

Drawings (installation)
Installation manuals