Serial Redundancy Switch

It can enable 2 SCADA Masters to talk to a common RTU or a single SCADA master to talk to Redundant RTU’s on the field. It can also be connected through PLCC modems. During Power On, whichever Master sends a query, is connected to the Output (Slave). In case your Master Port fails or Cable from your Primary Master to our Port has failed then SAM senses “No Communication” between the Primary Master & the Slave & seamlessly switches communication to your Secondary Master. Time Out is selectable from 1 Sec. to 1 min. This timeout is factory set. SAM will wait up to the Time Out in order to establish other connection. Manual selection of the Primary & Secondary Master is also provided for easy diagnostics. It is expected that during the failure of Primary Master connection, your Secondary master will start sending the queries. Alternatively, the Switch can also be used for communication between 2 Slaves & 1 Master. The query from a Master can be broadcasted to both the Slaves but only 1 Slave need to respond at a time. This is in cases where the Slaves are Redundant.

• Item Code: SAM-201I

Offering communication Redundancy has taken roots. There is a felt need to communicate SCADA PC / HMI / DCS etc with Redundant Controllers / PLC / RTU’s / IED devices etc. SRS has been designed to cater to this requirement of the industry. It is Protocol independent & all the 3 Ports are RS232 / RS485 / RS422 configurable.

Applications:
It can enable 2 SCADA Masters to talk to a common RTU or a single SCADA master to talk to Redundant RTU’s on the field. It can also be connected through a PLCC modems etc During Power On, whichever Master sends a query, is connected to the Output ( Slave ). In case your Master Port fails or Cable from your Primary Master to our Port has failed then SRS senses “No Communication” between the Primary Master & the Slave & switches communication to your Secondary Master. Time Out is selectable from 1 Sec. to 9 Sec. SRS will wait up to the Time Out in order to establish other connection. Manual selection of the ports is provided for easy diagnostics. It is expected that during this time your Auto Redundancy logic will also start sending queries from the Secondary master.

Alternatively, the Switch can also be used :

• For communication between 2 Slaves & 1 Master. The query from a Master can be broadcasted to both the Slaves but only 1 Slave need to respond at a time. This is in cases where the Slaves cannot be multi-dropped
• To create cable level redundancy for devices having only a Single Serial port

• Item Code: SRS-201