POS Software for Restaurant, Retail, Pizza, Liquor Store, Grocery and Delivery
Plexis Point of Sale Software
Call 1-302-727-0333

12:00pm to 8:00pm Weekdays Eastern Time

Plexis POS Software Free Offer
Use your own Credit Card Company
Non-Cloud Based Software


Plexis POS fully integrates Credit Card, Debit Card, EBT / SNAP Food Stamps and EBT Cash Benefits.
Obtain a compatible PAX Pin Pad Terminal from any Payment Processor
or Merchant Services provider of your choice.

* We recommend that you use a PAX S300 Pin Pad Terminal running PAX Base v1.47 firmware.

PAX Base v1.47 Settings on a PAX Pin Pad Terminal   Diagnostic Example in Plexis POS
Main Communication LAN
Backup Communication Dial
Maximum Tries 1
Connect Timeout 300
Lan Type Static
IP Address ex:
Subnet Mask ex:
Gateway IP ex:
DNS IP ex:
ECR CommType Ethernet
Communications Port 10009
Communication Protocol HTTP GET
Duplicate Checking ON (enable)

Enter the setup mode for PAX S300 terminals by holding the FUNC key down and press the "1" key, SP30 terminals Press and release the "F" key.
Enter the password which is todays date (MMDDYYYY) and press the Green Arrow Key.
You may be prompted to enter the password multiple times throughout the setup process.

  Currently Plexis POS Supports PAX Base v1.47 and PAX ECR
Interface v1.60 that was released by PAX on 05-23-2022.

Perform an Initialize Terminal command in the Plexis POS Diagnostic
utility and under the Full Response window you should see the
Pax Base Version in cell 2::

This example shows the older Pax Base v1.44:
Pax S300 or SP30 Pin Pad Terminal Supported Base Version

* Customers have reported using different PAX Terminal models that work in Plexis POS but we have only tested PAX S300 and SP30 terminals using PAX Base version 1.47. According to the PAX factory they indicated that all of their pin pad terminals use the same internal base software so other PAX models may work as well.

** Warning: Using unsupported PAX Base firmware may result in undesirable operation.

If you get this error when processing a card and you are certain all other settings are correct there is a good chance your router is blocking the Terminal IP address and port. Configure your router to allow access to the terminal as described below.

Router / Firewall Settings :
If you are connecting your PAX terminal through a router you will need to set Port Forwarding up for EACH terminal IP and Port connected to the router.
Port Forwarding Example :
Port forwarding example for a router
Click image for details

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Restaurant POS Software | Pizza POS Software | Coffee Shop POS Software
Grocery Store POS Software | Convenience Store POS Software
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Cafe and Deli POS Software | EBT / Snap and Food Stamp POS Software

Plexis Point of Sale Software
Call 1-302-727-0333

12:00pm to 8:00pm Weekdays Eastern Time

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