Coin payout hopper teardown

I got this to take apart for our entertainment. It's a serially controlled coin payout hopper that uses the CCtalk serial protocol used in gaming equipment for simple serial addressing of coin handling equipment.
This particular unit has just three wires connected. 24V, 0V and data.

The CCtalk protocol was originally developed by coin controls to minimise wiring. It has a single line which any device on the network can pull to the zero volt rail with a simple NPN transistor. Each device can have an address set locally by wire links, and when asked on that address will identify itself and allow control of coin acceptance, payout or fault indication. There's also an option for loading new firmware via the serial connection. Speed is typically 9600 baud.

Not having anything that can generate the correct control data locally, I experimentally hot-wired the motor PCB and its associated shunt relay.

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