How to Use Bill Acceptor TP70: Examples, Pinouts, and Specs

The Bill Acceptor TP70 is a reliable and efficient device designed for accepting and validating paper currency in automated systems. It is commonly used in vending machines, kiosks, arcade machines, and other self-service payment systems. Equipped with advanced sensors, the TP70 ensures accurate detection of counterfeit bills and supports multiple currency types. Its robust design and ease of integration make it a popular choice for businesses requiring secure and automated cash handling.

The following table outlines the key technical details of the Bill Acceptor TP70:

The TP70 features a standard connector for power and communication. Below is the pinout for the RS232 interface:

1. Power Connection: Connect the VCC pin to a regulated 12V DC power supply and the GND pin to the ground of your system.
2. Communication Setup: Use the RS232 interface to connect the TXD and RXD pins to the corresponding pins on your microcontroller or host device.
3. Bill Validation:
   • Ensure the device is properly configured for the currency and denominations you wish to accept.
   • Insert bills into the acceptance slot. The TP70 will validate the bill and send a signal to the host device indicating acceptance or rejection.
4. Inhibit Function: Use the INHIBIT pin to disable or enable bill acceptance as needed. Pulling this pin low will disable the device.

• Power Supply: Use a stable and regulated 12V DC power source to avoid malfunctions.
• Mounting: Securely mount the TP70 in your system to prevent vibrations or misalignment.
• Firmware Updates: Check for firmware updates from the manufacturer to ensure compatibility with new currency designs.
• Cleaning: Periodically clean the bill path and sensors to maintain optimal performance.

Below is an example of how to interface the TP70 with an Arduino UNO using the RS232 interface:

• Connect the TP70's TXD pin to Arduino's RX (pin 0).
• Connect the TP70's RXD pin to Arduino's TX (pin 1) through a level shifter (if required).
• Connect the VCC and GND pins to a 12V power supply and ground, respectively.

#include <SoftwareSerial.h>

// Define RX and TX pins for communication with TP70
SoftwareSerial tp70Serial(10, 11); // RX = pin 10, TX = pin 11

void setup() {
  Serial.begin(9600); // Initialize serial monitor
  tp70Serial.begin(9600); // Initialize TP70 communication

  Serial.println("Bill Acceptor TP70 Initialized");
}

void loop() {
  // Check if data is available from the TP70
  if (tp70Serial.available()) {
    String data = "";
    while (tp70Serial.available()) {
      char c = tp70Serial.read();
      data += c;
    }
    Serial.print("Received from TP70: ");
    Serial.println(data); // Print received data to serial monitor
  }

  // Example: Send a command to TP70 (replace with actual command)
  if (Serial.available()) {
    char command = Serial.read();
    tp70Serial.write(command); // Send command to TP70
  }
}

1. The TP70 does not power on:

   • Verify that the power supply is providing 12V DC.
   • Check the wiring for loose or incorrect connections.

2. Bills are not being accepted:

   • Ensure the INHIBIT pin is not pulled low.
   • Confirm that the device is configured for the correct currency and denominations.
   • Clean the bill path and sensors to remove dust or debris.

3. Communication issues with the host device:

   • Verify the baud rate and communication settings (default is 9600 baud for RS232).
   • Check the TXD and RXD connections for proper wiring.

4. Frequent rejection of valid bills:

   • Update the firmware to the latest version.
   • Inspect the bill path for obstructions or misalignment.

Q: Can the TP70 accept multiple currencies simultaneously?
A: Yes, the TP70 can be configured to accept multiple currencies, but this depends on the firmware and regional settings.

Q: How do I update the firmware?
A: Firmware updates can be performed using the manufacturer's software and a compatible programming cable. Refer to the manufacturer's documentation for detailed instructions.

Q: What is the maximum bill length the TP70 can handle?
A: The TP70 is designed to accept bills with a width of 62mm to 72mm. The length is typically not a limiting factor as long as the bill fits within the acceptance slot.

Q: Is the TP70 compatible with MDB protocol?
A: Yes, the TP70 supports MDB protocol, making it suitable for integration with vending machines and other MDB-compliant systems.