Use this module to program the VMA439 through USB.
Features:

1. single chip USB to asynchronous serial data transfer interface
2. data transfer rates from 300 baud to 3 Mbaud (RS422, RS485, RS232) at TTL levels
3. transmit and receive LED drive signals
4. USB 2.0 Full Speed compatible
5. switchable 3.3 VDC and 5 VDC operation
6. comptaible with the VMA439

Specifications:

1. power supply: 5 VDC by USB cable (included)
2. : micro USB connector
3. dimensions: 43 x 17 x 12 mm
4. weight: 5 g

ft232r_datasheet.pdf

vma440-schematic.pdf

wpi440a4v01.pdf

ce_rohs_open.pdf