1. Introduction
This manual provides essential instructions for the proper setup, operation, and maintenance of your PAX S300 v2 PIN Pad/Card Reader. The S300 v2 is an integrated retail payment solution designed for secure transaction processing, supporting contactless, e-Signature, magnetic stripe, and EMV Chip & PIN payments. Please read this manual thoroughly before using the device to ensure optimal performance and security.
2. Safety Information
- Do not disassemble, repair, or modify the device. Unauthorized modifications may void the warranty and pose safety risks.
- Use only the power adapter and cables supplied by the manufacturer.
- Avoid exposing the device to extreme temperatures, direct sunlight, dust, or moisture.
- Keep the device away from strong magnetic fields.
- Ensure the device is placed on a stable, flat surface during operation.
- If the device is damaged or malfunctions, discontinue use immediately and contact customer support.
3. Package Contents
Verify that all items are present in the package:
- PAX S300 v2 PIN Pad/Card Reader
- Power Adapter
- Connectivity Cable (e.g., USB, Ethernet, RS232)
- Stylus (for signature capture)
- Quick Start Guide (if applicable)
4. Product Overview
4.1. Key Features
- Secure Payment Processing: PCI PTS 3.x and SRED certified for enhanced security.
- Multiple Payment Options: Supports EMV Chip & PIN, magnetic stripe, and contactless (NFC) transactions.
- Color Touch Screen: Large display for clear transaction prompts and e-Signature capture.
- High Performance: Equipped with a 32-bit ARM11 processor for efficient operation.
- Connectivity: Offers USB, Ethernet (LAN), and RS232 connectivity options.
4.2. Device Components

- Color Touch Screen: Displays transaction information and allows for signature capture.
- Keypad: For PIN entry and menu navigation.
- Magnetic Stripe Reader: Located on the side for swiping cards.
- EMV Chip Card Slot: Located at the bottom for inserting chip cards.
- Contactless Reader: Integrated into the screen area for NFC payments.
- Connectivity Ports: Located at the rear for power, USB, Ethernet, and RS232 connections.
5. Setup
5.1. Connecting the Device
- Connect Power: Plug the power adapter into the power port on the back of the S300 v2, then plug the adapter into a wall outlet.
- Connect to Host System:
- USB: Connect the USB cable from the S300 v2 to an available USB port on your point-of-sale (POS) system or computer.
- Ethernet (LAN): Connect an Ethernet cable from the S300 v2's LAN port to your network router or switch.
- RS232: Connect the RS232 cable from the S300 v2 to the serial port on your POS system or computer.
- Power On: The device should power on automatically once connected to power. If not, press and hold the power button (if available) until the screen illuminates.
- Software Configuration: Follow the instructions provided by your payment processor or POS software vendor to configure the S300 v2 with your system. This typically involves selecting the correct communication port and device type within the POS application.
6. Operating Instructions
The PAX S300 v2 supports various transaction types. Always follow the prompts displayed on the device screen.
6.1. EMV Chip Card Transactions
- When prompted by the POS system, instruct the customer to insert their EMV chip card into the slot at the bottom of the S300 v2.
- Ensure the chip faces upwards and is fully inserted.
- The device will process the transaction. The customer may be prompted to enter their PIN or provide a signature.
- Once the transaction is complete, the device will prompt the customer to remove their card.
6.2. Magnetic Stripe Card Transactions
- When prompted, instruct the customer to swipe their magnetic stripe card through the reader slot on the side of the S300 v2.
- Ensure the magnetic stripe faces the device.
- If the swipe is unsuccessful, try again at a consistent speed.
- The customer may be prompted for a signature.
6.3. Contactless (NFC) Transactions

- When prompted, instruct the customer to tap their contactless card or NFC-enabled device (e.g., smartphone, smartwatch) near the contactless symbol on the S300 v2 screen.
- Hold the card/device steady until the transaction is confirmed.
- A beep or visual confirmation on the screen will indicate a successful read.
6.4. PIN Entry
- When the device prompts for PIN entry, the customer should use the physical keypad to enter their Personal Identification Number.
- After entering the PIN, press the green ENTER key.
- Ensure the customer's privacy during PIN entry.
6.5. Signature Capture

- If a signature is required, the S300 v2 screen will display a signature line.
- Instruct the customer to use the provided stylus or their finger to sign on the touch screen.
- After signing, the customer should tap the ACCEPT or OK button on the screen.
7. Maintenance and Cleaning
- Cleaning: Use a soft, lint-free cloth slightly dampened with water or a mild, non-abrasive cleaner to wipe the device's exterior. Do not use harsh chemicals, solvents, or abrasive materials.
- Screen Care: For the touch screen, use a screen-specific cleaner and a microfiber cloth. Avoid excessive pressure.
- Ports: Keep all ports free of dust and debris. Do not insert foreign objects into any slots or ports.
- Storage: When not in use for extended periods, store the device in a cool, dry place, away from direct sunlight.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | No power connection or faulty power adapter. | Ensure the power adapter is securely connected to the device and a working power outlet. Try a different outlet. |
| Transaction fails. | Incorrect card insertion/swipe, communication error, or card issue. | Ensure the card is inserted/swiped correctly. Check cable connections to the POS system. Contact your payment processor for network or card-specific issues. |
| Screen is unresponsive. | Temporary software glitch. | Restart the device by disconnecting and reconnecting power. If the issue persists, contact support. |
| Stylus not working for signature. | Stylus damage or screen calibration issue. | Ensure the stylus tip is intact. Try using a finger. If the screen is generally unresponsive, refer to the "Screen is unresponsive" solution. |
9. Specifications
- Model: PAX S300 v2
- Processor: 32-bit ARM11
- Security: PCI PTS 3.x, SRED
- Card Readers: EMV Chip Card, Magnetic Stripe, Contactless (NFC)
- Connectivity: RS232, Ethernet (LAN), USB Type A
- Display: Color Touch Screen
- Dimensions: (Refer to product packaging or official PAX documentation for exact dimensions)
- Operating Temperature: (Refer to product packaging or official PAX documentation)
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact your authorized PAX distributor or reseller. Keep your purchase receipt and product serial number handy when seeking support.
You can also visit the official PAX Technology website for general product information and support resources.





