PT1-LA4-USA MDB Platinum from Pyramid: Bus-Powered Validator, 150-Note Locking Box

The PT1-LA4-USA is Pyramid's MDB build (power code 4) paired with the locking 150-note cash box (codes L and A). Power and data both come from the vending machine controller over the Multi-Drop Bus, so there is no separate supply to wire. BillAcceptors.us lists it as the PT1-LB4-USA with a 150-note box swapped in for the 500-note box, which makes it the choice for snack, drink and combo machines whose door is set up for the smaller box. US notes run through a 67 mm path, and the MDB harness, P/N 05AA0038, arrives installed.

Mount the acceptor, then plug the factory 05AA0038 lead into the machine's MDB bus. Pyramid's pinout puts +24 VDC on pin 1, DC return on pin 2, Master Receive on pin 4, Master Transmit on pin 5 and communications common on pin 6, with pin 3 left open.

A 150-note box fills sooner than the 500-note version, so look at how many bills the machine takes between visits before you set a route schedule. The rear LED flashes green for a full box and purple when the box is missing.

Same bus with more room: PT1-LB4-USA (500-note box). Machines without MDB: PT1-LA1-USA for 12 V or PT1-LA3-USA for 120 V AC.

Pyramid's install order applies here too: disconnect all power, mount the unit, connect the cable, secure the wiring, close the door and power up. Then feed each denomination to confirm the machine credits it correctly.

What does the A in PT1-LA4-USA stand for?

150-note cash box capacity. The L before it means a locking-type box, 4 is Pyramid's MDB power option and USA is the currency. The PT1-LB4-USA has a B in that spot, which is the 500-note box.

Does it need its own power supply?

No. The MDB build draws +24 VDC from pin 1 of the bus connector, so the vending controller's bus powers it along with the coin changer and other MDB devices.

Which LED codes relate to the cash box?

Pyramid's table lists a green flash for a full box, a purple flash for a missing box, and a red flash for an acceptor or stacker jam or punch failure. A solid green means no error.

How often should the cash box be serviced?

Pyramid's maintenance table calls for checking cash box belt tension and cleaning the belts once a year. The validation, wheel and OAS sensors get canned air every 3 months.