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MASTER COMMUNICATION PROTOCOL
OPERATION
The RegCom-Pro or Hydra/Regcom/Vnetworker/Networker use a bi-directional, 2-wire RS-485 databus to communicate.
A RegCom-Pro can be a Slave or a Master. A Regcom, Vnetworker or Networker are used to convert the VSI-Pro, ECR
Cards or Adapters to be slaves. The Hydra is a “Master” device and only one unit required for up to 16 Slaves. Only one
master device can exist on a single network. When the RegCom-Pro is used to connect to a register that uses the
emulate mode then it can not be a Master. However the RegCom-Pro can connect to a normal register in tap mode and
still be configurable as a master or slave.
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 or RegCom-Pro 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 or RegCom-Pro to be mounted in a convenient rack and connected to a Master
for display of cash register data remotely. See Figure below.
HYDRA COMPATABILITY LIST
DVR
Norbain Columbus
GE StoreSafe
Kalatel StoreSafe
NOVAR VP
Dallmeier
Appro
Pinetron
Figure 142: DS-20-OF RegCom-Pro PCB Rack using VSI-ADD protocol
MASTER / HYDRA
APPENDIX M
RegCom-Pro POS / Cash Register Interface
Pair 3
1
2
3
4
5
6
7
8
Pair 2
Pair 4 Pair 1
T568B
The Network Port of a RegCom-Pro, Regcom or Hydra use an RJ45 connector. Each unit has two RJ45s and the
Networking signals Pins 4&5 are in parallel. However in the RegCom-Pro all pins are wired in parallel but the Regcom
or Hydra are not. The useage of an RJ45 connector allows the installer to use either RJ11, RJ12 or RJ45 connectors
since all support the center two pins of the connector which are the only pins used.
Figure 141 : RJ45 Network Connector Pin Out