Technical & Electrical Specifications

Nominal Voltage

12 V DC

Continuous Current Draw

0.4 A

Default Duty Cycle

1

Estimated Daily Use

24

Critical

False

Terminal Pinouts & Hardware Connections

Verify physical terminal sizes, stud threads (M6, M8, M10), and circuit polarity before crimping lugs or running wiring.

Hardware terminal connection details and stud sizes for Cerbo GX MK2 System Monitor
Terminal Label	Polarity / Type	Nominal Voltage	Physical Hardware	Location
V+ power_pos	+ DC Positive	12V	Screw Terminal Clamp	Top Panel
V- power_neg	- DC Negative	12V	Screw Terminal Clamp	Top Panel
VED1 ved1	Data	12V	Screw Terminal Clamp	Bottom Panel
VED2 ved2	Data	12V	Screw Terminal Clamp	Bottom Panel
VED3 ved3	Data	12V	Screw Terminal Clamp	Bottom Panel
VEB1 vebus	Data	12V	Screw Terminal Clamp	Bottom Panel
VEB2 vebus2	Data	12V	Standard Terminal	Bottom Panel
CAN vecan	Data	12V	Screw Terminal Clamp	Bottom Panel
BMS bmscan	Data	12V	Standard Terminal	Bottom Panel
GX gx_touch	Data	12V	Screw Terminal Clamp	Right Panel

Installation Safety Standard: Always size circuit protection (ANL, MIDI, or MEGA fuses) to protect the cable run attached to these terminals against dead shorts and thermal overload, in compliance with AS/NZS 3001, AS/NZS 3004, and ABYC E-11 standards.

Official Product Manual & Wiring Guidelines

Manufacturer technical instructions, safety precautions, and troubleshooting procedures.

1. Safety Instructions

WARNING: POWER THE CERBO FROM THE BATTERY
Always power the Cerbo GX MK2 directly from the system battery, never from the AC-out of an inverter/charger. If the inverter shuts down due to a fault, a Cerbo powered from AC-out will also lose power, preventing it from recovering the system — a deadlock.

WARNING: INLINE FUSE REQUIRED
The supplied DC cable includes an inline 3.15A slow-blow fuse. Always ensure this fuse is intact. Do not bypass it or use a higher-rated fuse.

CAUTION: VE.Can TERMINATION
Both ends of every VE.Can network must be terminated with the supplied blue RJ45 terminators. An un-terminated bus will cause communication errors across all connected devices.

Note: The Cerbo GX MK2 is rated IP20 — indoor use only. Do not expose to rain, condensation, or direct water contact.

Parameter	Value
Model	BPP900450110 (Cerbo GX MK2)
Supply Voltage	8 – 70V DC
Power Consumption	~4W typical
Inline Fuse	3.15A slow-blow (supplied)
VE.Direct Ports	3× (isolated)
VE.Bus Ports	2× RJ45 (parallel)
VE.Can Ports	2× RJ45 (VE.Can 1 is isolated)
USB Host Ports	3× fully functional
Ethernet	1× RJ45 100Mbit
Wi-Fi	2.4GHz 802.11 b/g/n
Bluetooth	4.2 (VictronConnect)
HDMI	1× (GX Touch display)
Relays	2× NO/NC, 6A/30VDC or 1A/70VDC
Digital Inputs	4× (3.3V logic, pulse counting)
Temperature Inputs	2×
Tank Level Inputs	4× (resistive sensor)
Dimensions (HxWxD)	78 × 154 × 48 mm
Weight	0.4 kg
Operating Temp	-20°C to +50°C
IP Rating	IP20 (indoor only)
Firmware	Venus OS (OTA updates via VRM)

Terminal	Connect To	Notes
V+ (red cable)	Battery positive or fused bubar	Inline 3.15A slow-blow fuse included on cable — do not bypass
V- (black cable)	Battery negative / chassis ground	Secure common negative reference

Symptom	Possible Cause	Action
Device not found in VRM	No internet connection	Check Wi-Fi/Ethernet settings. Verify VRM registration via Settings → VRM Online Portal.
VE.Direct device not visible	Wrong port or faulty cable	Swap VE.Direct cable. Try a different port. Check device is powered.
VE.Can devices missing	Missing terminator	Ensure blue RJ45 terminators at both ends of the CAN chain. Check baud rate settings match device.
GX Touch not responding	Loose cable or incompatible firmware	Re-seat the display cable. Update Venus OS via Settings → Firmware.
System stuck (deadlock)	Cerbo powered from AC-out of inverter	Re-wire Cerbo power directly to battery. Add UPS if needed.
Relay not activating	Rule not configured	Check Settings → Relay → Function. Confirm trigger condition is met.

Cerbo GX MK2 System Monitor

Technical & Electrical Specifications

Terminal Pinouts & Hardware Connections

Official Product Manual & Wiring Guidelines

1. Safety Instructions

2. Description

3. Specifications

4. Installation & Wiring

4.1 Power Connection

4.2 VE.Direct Connections

4.3 VE.Bus (Inverter/Charger)

4.4 VE.Can Connections (MK2 Improvement)

4.5 GX Touch Display

4.6 Digital Inputs

5. Troubleshooting

6. Maintenance

Plan Your System with the Cerbo GX MK2 System Monitor

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