What is a Cash Drawer Detect Open Smart‑Sensor‑3❓

The Cash Drawer Detect Open Smart‑Sensor‑3 is a precision electronic sensor built to monitor the physical status of a cash drawer. Smart‑Sensor‑3 is engineered to operate in a normal close (NC) configuration.

The trigger uses a cash drawer physical sensor configured as normal close (NC)

Hardware Connection

• The cash drawer connects via RJ12 cable Plug to a USB trigger device RJ12 socket.
• Pin 3 and Pin 6 are typically used for the sensor signal lines (Normal Close).

Open and Closed State

• Open State: When the drawer is open, the sensor outputs a continuous signal (e.g., 00).
• Closed State: Once the drawer is closed, the 00 signal stops.
• POS Integration: The POS system reads this signal in real time to verify drawer status.

POS Integration

• The POS system can read the sensor signal at any time.
• This enables real‑time verification of drawer status, ensuring transaction accuracy and security.

Smart Advantages

• Provides instant detection of drawer status.
• Enhances security by preventing unnoticed open drawers.
• Ensures transaction accuracy by aligning drawer state with POS activity.
• Simple, reliable, and easy to integrate into standard POS setups.

How to check cash drawer pin assignment ? 

1. (Right Meter) Check the Red Pin 2 and Pin 5  , Green Pin 4 wires  common on the solenoid shows a slight variation in readings.

2. (Left Meter) Check with the Pink Pin 3 and Black Pin 6 wire shows a significant difference between cash drawer open and closed.

• This cash drawer routine supports standard Epson and Star POS printer pin configurations, as well as all Acode cash drawer triggers.
• Important: You must verify the your cash drawer’s solenoid voltage and pin assignment before connecting it to your receipt printer or POS terminal or Acode cash drawer triggers.