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VSI-Pro VIDEO SERIAL INTERFACE
REGCOM / HYDRA COMMUNICATION PROTOCOL
OPERATION
The Regcom receives RS-232 data from a cash register, VSI-Pro, Interface Adapter, or ECR Interface card inside
the cash register. It then stores this data in its buffer before sending it on to the Hydra via the RS-485 network.
The Regom & Hydra use a bi-directional, 2-wire RS-485 databus to communicate with each other. The Hydra is a
“master” device and the Regcom is a “slave” device. One master device can be connected to a maximum of 16
slave devices. Only one master device can exist on a single network.
The master device controls the flow of data by polling each of the slaves in turn. When polled, a slave device will
either respond with a ‘‘No Data’’ code to say it has no data to send, or it will begin sending data from its buffer.
The Hydra can support many manufactures of DVR for direct storage of the transaction data on the DVR as a file
rather than just inserting in the video image for recording. It also supports the VSI-ADD (VSI Addressable) format
which allows multiple VSI-Pros to be mounted in a convenient rack and connected on Hydra for display of cash
register data remotely.
HYDRA COMPATABILITY LIST
DVR
< Norbain Columbus
< GE StoreSafe
< Kalatel StoreSafe
< NOVAR VP
< Dallmeier
< Appro
< Pinetron
Other
< RegCom
< Networker
< Vnetworker
< VSI-ADD
Figure 1C: DS-20-OF VSI-Pro PCB Rack using VSI-ADD protocol
APPENDIX C HYDRA and REGCOM