A 2+6 to XT90 battery adapter cable cannot be specified by connector names alone. The 2+6 interface includes two power contacts and six signal contacts, while the XT90-side connection is normally used for the positive and negative power conductors. Before production, the customer must define where all six signal wires go, the power polarity, cable gauge, length, current requirement and environmental protection.
Quick Answer: How Should a 2+6 to XT90 Cable Be Wired?
The two power contacts on the 2+6 connector can be routed to the positive and negative XT90 power terminals according to the approved polarity drawing. The six signal contacts must be routed to a separate auxiliary connector, terminated as labeled flying leads, or intentionally left unused only when the approved design permits it. Every conductor must be defined in a pin-to-pin wiring table before sampling.
| 2+6 Circuit | Typical Destination | Required Confirmation |
|---|---|---|
| Power positive | XT90 positive terminal | Polarity conductor size fuse and current requirement |
| Power negative | XT90 negative terminal | Polarity conductor size and return path |
| Signal 1 to 6 | Auxiliary plug labeled leads PCB or unused positions | Function voltage wire color terminal and pin number |
| Shield or drain if required | Specified grounding point | EMC design and termination method |
What Is a 2+6 EV Battery Connector?
A 2+6 battery connector combines two larger power contacts with six smaller signal contacts in one interface. The power contacts carry the main battery circuit. The signal contacts may be assigned to temperature sensing, communication, identification, interlock, wake-up or other low-current functions according to the approved system design.
CONNIXTECH offers a catalogue-backed 50A 300V 2+6 pin IP67 EV battery connector for electric two-wheelers. The final cable assembly rating depends on the complete connector, conductor, termination and installation conditions.
Three Practical Adapter Structures
1. XT90 Power Plus Separate Signal Connector
The two power conductors terminate at the XT90-side connector, while the six signal wires terminate in a separate multi-pin plug. This is usually the clearest architecture when the controller or test equipment requires both power and signal functions.
2. XT90 Power Plus Labeled Signal Leads
The power conductors terminate at XT90, and the signal conductors remain as labeled flying leads with specified terminals or stripped ends. This structure can support prototypes and test fixtures, but wire labels, lengths and termination details must be controlled carefully.
3. Power-Only Adapter With Unused Signal Positions
Some projects may use only the two power contacts. In that case, the unused signal positions must be documented on the drawing, and the design team must verify that the equipment does not rely on communication, temperature, identification or interlock circuits.
Ten Details Required for a Quotation
- Battery and equipment application
- Continuous and peak current
- System voltage
- Power polarity viewed from the mating face
- Function of signal pins 1 through 6
- Power and signal conductor sizes
- Overall length and branch lengths
- Wire colors labels terminals and auxiliary connector
- Required IP protection and operating temperature
- Sample quantity mass-production quantity and delivery target
Cable Gauge and Current Rating
Do not determine cable gauge from connector current alone. Conductor size should be reviewed against continuous current, peak duration, cable length, bundling, ambient temperature, allowable voltage drop and temperature rise. The lower-rated element in the complete assembly determines the practical system limit.
Waterproofing and Overmolding
An IP67 connector does not automatically make the entire adapter cable IP67. The connector mating condition, cable entry, branch point, auxiliary signal termination and opposite-side connector must all be evaluated. Overmolding and strain relief can improve cable-entry sealing and mechanical support when designed for the specified cable diameter.
Common Design Mistakes
- Failing to define the six signal-wire destinations
- Providing polarity without stating the viewing direction
- Selecting cable gauge from peak current only
- Assuming every connection point is waterproof
- Changing wire colors or pin numbers after sample approval
- Starting production without an approved continuity table
2+6 to XT90 Adapter Cable FAQ
Can all eight circuits connect directly to XT90?
No. The XT90-side interface normally carries the two main power conductors. The six signal circuits need a separately defined destination or must be marked unused on the approved drawing.
Can the cable length and wire colors be customized?
Yes. CONNIXTECH can customize cable length, branch length, conductor size, wire color, labels, signal terminals, auxiliary connectors, overmolding and packaging according to the approved specification.
Is a sample recommended before mass production?
Yes. A sample allows the customer to verify polarity, continuity, mating, cable routing, branch length and equipment compatibility before mass production.
Request a Pin-to-Pin Review
Send your wiring diagram, current, voltage, cable specification, signal definitions, dimensions and quantity for review. Explore additional battery and EV connector solutions or request a custom cable assembly quotation.