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| Overview

HyperStat Split is the best-in-class thermostat that can measure parameters in the zone and controls equipment at zone and system levels (RTUs & FCUs) by connecting seamlessly over two wires reducing the cost of additional cabling. For more information on the device refer to HyperStat Split Overview & Installation

With the vision towards platform play and greater interoperability in the building management space, the HyperStat Split is built and developed in such a way that it can either, work in a 75F BMS environment connected to 75F's CCU configured for system and terminal level profiles, or can support an external Modbus network as a Modbus server, or it can also work as an independent or standalone device which can work as per profiles which can be configured in the HyperStat Split itself.

The HyperStat Split when used in a BACnet network provides the capability to the customer, to configure a HyperStat Split in a BACnet MSTP-based (Master-Slave Token Passing) protocol using the RS 485 bus, and it can work both as master or salve and read and write the data in a certain format in the BMS. With its powerful onboard sensors. HyperStat Split can be an excellent asset to the BACnet-supported BMS.

| Wiring

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The wiring that is used to connect a Modbus device to a HyperStat Split is called the RS485 communication protocol. The RS485 connector uses a three-wire protocol as shown below:

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It comprises an earthing sheath and a twisted pair of wires. Every Modbus device has an 'A' and 'B' indication in them, for aiding the wiring.

The earthing or the ground wire is usually earthed only at one point. Normally, this connection is made at one end of the main cable, in this case, it is connected to the ground point of the COnnect Module.

For the Twisted pair of wires, there are no specific color criteria that are followed, it can be of any color. The wire that is connected to the 'A' indication point in the Modbus device is connected to the 'A' indication point in the Connect Module, and the wire that is connected to the 'B' indication point in the Modbus device is connected to the 'B' indication point in the COnnect Module.

For other factors to be considered while wiring an RS485 cable kindly refer to Modbus/BACnet Wiring and General Guidelines

| Wiring Harness

The 75F supports a type of wiring harness to meet the need for Daisy Chain HyperStat Split in a Modbus network.

3 Wire to 6 Wire Screw Connector

 

This uses a 4-pin Molex connector at one end and a 6-wire, screw connector at the other end, you can simply twist the four wires and insert them into the screw slots provided for connection. 

| Example Daisy Chaining

| Configuration

From the home screen of the UI 

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  • Press the + & - buttons together to navigate to the other screens of the HyperStat Spilt

The Inputs screen is displayed initially

  • Press the next button to navigate to the Communication options screen

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The communications options screen is displayed.

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  • Press the down arrow up_arrow.png to navigate to the options available under the screen.

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Setting Baud Rate:

  • Press the up_arrow.png to navigate to the option Baud rate

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  • Press the select option to modify the configuration parameter Baud rate.

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  • Use the up Down_arrow.png or down up_arrow.png buttons to modify the Baud rate, it is usually 38400

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  • Press Deselect to confirm the selection.

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Setting Parity:

  • Press the up_arrow.png to navigate to the parameter Parity

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  • Press the select option to modify the configuration parameter Parity.

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  • Use the up Down_arrow.png or down up_arrow.png to modify the parity.

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  • Press Deselect to confirm the selection.

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Setting Stop Bits:

  • Press the up_arrow.png to navigate to the options parameter Stop bits.

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  • Press the select option to modify the configuration parameter Stop bits.

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  • Use the up Down_arrow.png or down up_arrow.png to modify the stop bits.

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  • Press Deselect to confirm the selection.

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Setting Address:

  • Press the Down_arrow.png to navigate to the parameter Address

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  • Press the select option to modify the configuration parameter Address.

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  • Use the up Down_arrow.png or down up_arrow.png to modify the address.

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  • Press Deselect to confirm the selection.

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Setting Protocol:

  • Press the Down_arrow.png to navigate to the protocol option.

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  • Press the select option to change the protocol.

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  • Press the up Down_arrow.png arrow twice to change the protocol to 

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  • Press Deselect.

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  • Press Confirm to confirm the protocol selection.

The HyperStat Split is configured as a BACnet server, and it restarts.

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  • Refer to HyperStat Split Points Exposed for BACnet, for Information on the points exposed by HyperStat Split for BACnet.
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