ABB RSI32 remote control unit Sample unit in Like new condition

Sample unit in Like new condition ABB remote control unit RSI32

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The RSI32 unit serves the function of collecting switch signals and converting them to digital signals for data exchange with MODBUS communication interface. It is used as the hardware unit of Remote Status Indication of ESD2000 Substation Supervisory & Control System. It is also applicable for other intelligent systems in which Remote Status Indication is required.

The RSI32 unit allows the simultaneous collection of 32 passive switch signals. The unit is connected to upper computer with an RS485 interface and utilizes Polling for data exchange to reflect the switch status on a real-time basis. This unit can store the sequence of 32 events (SOE information), and therefore can accurately indicate the time of the switch status changes.
2.1 Photoelectric Isolating Input 
The input takes place through photoelectric isolation, which guards the internal circuit against damage caused by possible external high voltage.
2.2 Switching Status Resolution
The Switching Status Resolution represents the ability of the RSI32 to differentiate the successive dislocations of multiple contacts. The module is capable of differentiating the dislocation of any two contacts occurring less than 2ms apart, and indicating it in the SOE information.
2.3 Communication
The bus is in the two-wire half-duplex RS485 mode, capable of supporting up to 32 RSI32 units. The Shielded Twisted Pair (STP) is used for connection between units. The communication interface is based on high-reliability lightning-proof port chips, which are capable of suppressing the transient overvoltage on the circuit resulting from lightning and other causes, thereby preventing damage to
the interface and improving communication reliability. The data transmission is based on the CRC circulating redundancy calibration which greatly improves the data reliability and enhances its anti-interference capability