> For the complete documentation index, see [llms.txt](https://commanderhelp.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://commanderhelp.verifone.com/customer-documentation/petro-and-c-store/pin-pads/implementation-guides/m425a/hardware-installation.md).

# Hardware Installation

## Hardware Installation

Use this guide to install the M425A safely. Complete all connections before applying power.

### Choose a location

Place the terminal where both the merchant and cardholder can reach it. Keep cables clear of walkways.

* Keep the device away from heat, moisture, dust, oils, and direct sunlight.
* Do not use the terminal outdoors or near water.
* Avoid electrical noise from motors, neon signs, and similar equipment.
* Disconnect the terminal from the POS before cleaning.

{% hint style="warning" %}
Do not use the terminal near water. Do not connect power until peripherals are attached.
{% endhint %}

### Protect customer PINs

Position the terminal to prevent observation during PIN entry. An adjustable stand or approved privacy shield can reduce shoulder surfing.

Keep security cameras away from the keypad. Instruct cardholders to shield their PIN.

### Inspect the shipment

1. Inspect the carton for damage or tampering.
2. Validate the sender using the shipping documents and tracking number.
3. Remove the device, screw, and ordered accessories.
4. Remove plastic wrapping and the display film.
5. Inspect the terminal and tamper-evident labels.
6. Keep the carton and packing materials for future returns.

{% hint style="warning" %}
Do not use a damaged or tampered terminal. Notify the carrier and your Verifone service provider.
{% endhint %}

### Connect the multiport cable

The M425A supports integrated kits and orange-cable dongle connectivity.

1. Remove the rear cover.
2. Route the multiport cable through the rear cover.
3. Connect the cable to the rear multiport.
4. Replace the cover and tighten the screw.

The powered multiport cable supports USB and power connections.

### Install MSAM cards

The M425A supports up to three MSAM cards.

1. Power off the terminal.
2. Place it face down on a clean, soft surface.
3. Remove the rear cover.
4. Insert each MSAM with its gold contacts facing downward.
5. Replace the rear cover.

{% hint style="warning" %}
Use standard electrostatic-discharge precautions. A grounded anti-static wrist strap is recommended.
{% endhint %}

### Install a Micro SD card

1. Power off the terminal.
2. Place it face down on a clean, soft surface.
3. Remove the rear cover.
4. Insert the Micro SD card fully into its slot.
5. Replace the rear cover.

### Apply power

The terminal can use an external power pack, USB power, or Ethernet power. Use a dedicated circuit or UPS.

1. Connect the multiport cable to the rear of the terminal.
2. Close the rear cover.
3. Connect the approved power supply to the base module.
4. Connect the power cord to a wall outlet or surge protector.

{% hint style="warning" %}
Use only a Verifone-supplied power supply. Disconnecting power during a transaction can lose unsaved data.
{% endhint %}

### Optional accessories

#### Privacy shield

Clean the keypad surface. Remove the adhesive film, align the shield, and press it firmly into place.

#### Stand

Align the stand screws with the terminal’s rear keyholes. Place the terminal on the base and slide it down to lock it. Slide it upward to remove it.

The stand can be adjusted during transactions for privacy and convenience.

#### External devices

Supported peripheral configurations include ECRs, cash drawers, barcode scanners, keyboards, scales, printers, speakers, and USB devices.

{% hint style="warning" %}
Remove power from the multiport cable before connecting peripherals. Reconnect it only after completing all connections.
{% endhint %}


---

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