Machine and controller ID
Record the machine model, controller label, firmware or MDB version if visible, and cabinet type.
Guides
MDB wiring and sample
What should you check before an MDB vending sample?
Before an MDB vending sample, capture the machine model, controller label, MDB harness and connector photos, current reader, target vend action, and failure rules. Confirm the pinout and voltage from the controller documentation and qualified personnel; do not guess. MDB 4.2/4.3 is the target profile, and older versions or custom behavior require review and sample validation.
MDB harness photosVend testFailure casesSample validation
Part of MDB Vending Machine API Gateway
Before the sample
Four things to capture first.
A useful sample starts with the machine, controller, harness, and target action. Do not guess the wiring from a generic MDB diagram.
MDB harness and connector
Photograph the connector, pin positions, locking tab, cable routing, and any labels before disconnecting anything.
Payment module and reader
Document the current reader, cashless module, power source, and how it is connected to the controller.
Target action and data
Define the vend action, product or slot, result needed, and what should happen on timeout or failure.
Wiring checks
What to verify without guessing the pinout.
Use controller documentation
Get the pinout and voltage requirements from the controller or machine manual. Do not infer a pinout from wire color or a similar model.
Check connector and power
Inspect for damaged pins, loose locking tabs, correct supply voltage, ground, and a stable harness route. Electrical work should be done by qualified personnel.
Confirm the cashless path
Verify that the controller exposes the MDB cashless path expected by the project and that the current reader or module is understood.
Define failure behavior
Decide what happens on authorization timeout, vend failure, disconnect, or controller fault before the sample.
Sample test
From authorization to failure behavior.
Capture the baseline
Photograph the machine, controller, harness, reader, and model labels before changing anything.
Confirm the interface
Review the MDB path, connector, power, and target vend action with the machine documentation.
Run one authorization
Test one known product or slot and record the vend result or timeout.
Test failure and reconnect
Verify what happens when the vend fails, the link drops, or the controller returns an unexpected state.
Where QuLink fits
Machine-side MDB integration, not a wiring guarantee.
What QuLink can do
- Help identify the likely MDB, serial, or controller path from clear photos.
- Map a server command or payment approval to the MDB cashless action.
- Return vend result, timeout, fault, and device status when available.
- Prepare a repeatable sample profile for the rollout.
What it does not replace
- The controller manufacturer's pinout, wiring diagram, or voltage specification.
- Qualified electrical installation or machine safety certification.
- A repair service for a damaged controller, harness, or reader.
- A guarantee that every MDB version or controller will behave the same.
Not the right fit if
- There is no controller label, harness photo, or machine model to review.
- You need a pinout invented without the controller documentation.
- The work requires mains voltage or safety-certified installation beyond low-voltage control.
Sample record
What the sample should capture.
- Machine interface
- MDB cashless path, vending controller, harness, optional relay or serial
- Sample inputs
- machine model, controller label, connector photos, reader, target action
- Data returned
- authorization result, vend result, timeout, fault, online status
- Project mode
- sample preparation, MDB retrofit, API integration, rollout profile
FAQ
MDB sample questions.
Can you provide the MDB pinout?
The pinout must come from the controller or machine documentation. We can help identify the connector and likely path from clear photos, but we do not guess pinouts.
Do we need a full wiring diagram?
It helps, but a machine model, controller label, connector photos, and a real test can start the review. Missing documentation is a reason to slow down, not to guess.
What if the machine uses MDB 4.0 or an older version?
That requires a firmware and controller review. MDB 4.2/4.3 is the target profile, and older versions are not assumed to behave the same.
What should one sample test include?
Test authorization, dispense, vend result or timeout, a failure case, and reconnect behavior. Record the product or slot and the payment reference.
Can we keep the existing controller?
Often yes when the MDB cashless path is compatible. The sample confirms the harness, authorization, vend behavior, and result reporting.
Project RFQ
Send a machine photo. We help identify the board, interface, and next test step.
Send the machine model, controller label, MDB harness and connector photos, current reader, target action, and failure rules before the sample.
A good first message
If you are unsure about the exact interface, send what you have. Photos often answer more than a long spec.
- Machine type and target country
- Machine photo, board photo, or wiring photo
- Action after payment or API command
- Need data upload? expected quantity?
Fastest first step
- Send a machine photo
- Describe the action after API or payment
- Tell us if data upload is needed
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