Interac Terminal Brownout Diagnostic & Mitigation -... | terminalfaults.org

Technical Background:

Brownouts result from a sustained decrease in AC voltage, typically below 110V in North American systems. This insufficient voltage can disrupt the terminal's power supply unit (PSU), leading to erratic behaviour, data corruption, or complete shutdown. EMV chip readers are highly sensitive to stable voltage, baud-rate drops, and ESD (static electricity).

Symptoms:

Observed Interac terminal exhibiting brownout conditions; specifically, intermittent power loss or voltage dips leading to operational failure during transactions.

Possible Causes:

Overloaded electrical circuit: Excessive current draw on the same circuit as the terminal.
Faulty power adapter: Degradation of the terminal's power adapter, reducing its output voltage.
Loose power connections: Insecure connections at the wall outlet, power strip, or terminal power input.
Aging building infrastructure: Deteriorated wiring within the building causing voltage drops.
External power grid fluctuations: Utility company brownouts or voltage sags.
EMI/RFI interference: Nearby equipment emitting electromagnetic or radio frequency interference.

Solution:

1

Conduct a voltage test at the wall outlet during terminal operation using a multimeter to verify consistent voltage supply.
2

Inspect the terminal's power cable and adapter for any signs of damage, such as frayed wires or loose connections. Replace if necessary.
3

Ensure the terminal is plugged directly into a dedicated wall outlet or a high-quality surge protector.
4

Relocate the terminal to a different electrical circuit to reduce the risk of overloading.
5

Install an Uninterruptible Power Supply (UPS) to provide backup power during brownout conditions. Ensure the UPS is properly rated for the terminal's power requirements.
6

Check the power supply rating of the Interac terminal to ensure it matches the voltage from the outlet.
7

Implement an ESD control policy. Terminals placed near carpets during the winter months are more likely to have issues with brownouts, due to static discharge corrupting a transaction.

Safety Warning:

To prevent electrical shock, always unplug the terminal from the power outlet before inspecting cables or connections. Ensure the terminal is placed on a dry, stable surface. Do not attempt to open the terminal casing as this will void the warranty and may trigger anti-tamper mechanisms. Do not use damaged cables.

Prevention:

Regularly inspect power cables for damage and ensure secure connections. Clean the terminal casing with a dry, anti-static cloth. Avoid placing the terminal near sources of electromagnetic interference. Consider scheduling periodic electrical inspections of the building's wiring.

Expert Tip:

A rapid voltage drop may trigger the terminal's internal safeguards, even if the power source seems stable. Connect a power conditioner or online UPS between the wall outlet and the terminal to filter out voltage fluctuations and provide stable power. A ferrite choke on the power cord may reduce radio frequency interference.

Frequently Asked Questions

•What UPS (Uninterruptible Power Supply) specifications are recommended?

Select a UPS with a capacity exceeding the terminal's power requirements (in Volt-Amps). Consider a pure sine wave output for optimal compatibility and battery backup for at least 15 minutes of runtime.

•How do I identify sources of electromagnetic interference?

Look for nearby devices such as microwave ovens, fluorescent lights, or poorly shielded electronic equipment. Moving the terminal or using shielded cables can mitigate interference.

•What are the signs of a failing power adapter?

A failing power adapter may exhibit symptoms such as overheating, intermittent power output, or a noticeable decrease in voltage. Use a multimeter to verify the adapter's output voltage.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What UPS (Uninterruptible Power Supply) specifications are recommended?

•How do I identify sources of electromagnetic interference?

•What are the signs of a failing power adapter?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: