nVent RS485 Commonly Known User Guide
- June 27, 2024
- nVent
Table of Contents
nVent RS485 Commonly Known
Specifications
- Product Name: DTX RS485
- Standard: EIA/TIA-485 (RS-485)
- Connector Type: JST style connector
- Data Output: Serial
Product Usage Instructions
Connection Setup
- The DTX product family uses a JST style connector. You can refer to the JST connector datasheet for more details.
- To connect to the DTX port, use the recommended female part number SHR-04V-S. Custom connectors can also be created using this female part.
Datastream Information
- The datastream output includes various parameters such as Surge Count, TOV Count, Carrier Count, Module Status, Power System, and Line Status.
- An example data stream follows a specific format with hexadecimal values and ranges for different parameters.
Data Transmission
DTX products output data without requiring a handshake or receiving
incoming data. They provide a continuous stream of information.
Module and Power System Information
- The table provides details on the number of modules in a single carrier based on the power system.
- Module types are specified for each power system configuration.
General
EIA/TIA-485, commonly known as the RS-485 standard, specifies the electrical characteristics of transmitters and receivers for use in balanced digital multipoint systems. The protocol allows for simultaneous transmission of multiple devices at once. While there is no set methodology of how the data is packaged and transmitted, this document aims to be a quick-start guide for custom implementations of RS-485 with the DTX product family.
Connection Recommendations
The DTX utilizes a JST style connector. JST connectors are electrical
connectors manufactured to the design specifications by the company Japan
Solderless Terminal (JST) Manufacturing Company. The specific male connector
part number used is:
SM04B-SRSS-TB
The datasheet for the JST part can be found at:https://www.jst- mfg.com/product/pdf/eng/eSH.pdf
To utilize this port the following female part number is recommended: SHR- 04V-S For example a modified version of A04SR04SR30K51B will fit the SM04B- SRSS-TB. Custom connectors can be used and created using the female part to connect into the JST-port on the circuit board.
Datastream
The datastream is a serial data output as follows:
| S | T | C | M(1-28) | P | L |
|---|---|---|---|---|---|
| 0-9999 | 0-9999 | 1-4 | HEX | 1-8 | 0-1 |
The character predecessors indicate the following meanings:
| S | Surge Count |
|---|---|
| T | TOV Count |
| C | Carrier Count |
| M | Module Status |
| P | Power System |
| L | Line Status |
| Value (P) | Power System |
| --- | --- |
| 1 | 120/208 |
| 2 | 240SP |
| 3 | 120240HD |
| 4 | 240D |
| 5 | 277/480 |
| 6 | 230/400TT |
| 7 | 230/400TTS |
| 8 | 480D |
A sample datastream may look like this:
Sample datastream (note 9600baud,8,n,1):
While the RS-485 standard allows for simultaneous transmit and receive data on cables, the DTX product line only produces an output stream and requires no handshake or incoming data.
Modules / Power System / Carrier
The following table indicates how many modules are in a single carrier by power system.
| Power System | Module Types |
|---|---|
| 120/208 | DT2150DTXM |
| 240SP | DT2180DTXM |
| 120240HD | DT2180DTXM |
| 240D | DT2275DTXM |
| 277/480 | DT2350M |
| 230/400TT | DT1300M |
| 230/400TTS | EDT2300M |
| 480D | DT2510DTXM |
Schematic
Revision History
| Rev | Prepared by | Date | Detailed Description of Changes |
|---|---|---|---|
| C | GM | 21NOV23 | UPDATED MATING CONNECTOR |
| D | GM | 06DEC23 | UPDATED DATASTREAM EXAMPLES |
FAQ
Q: Can custom connectors be used with the DTX RS485?
A: Yes, custom connectors can be created using the recommended female part
number SHR-04V-S to connect to the JST port on the circuit board.
Q: What type of data output does the DTX RS485 provide?
A: The DTX RS485 provides a serial data output with specific parameters
including Surge Count, TOV Count, Carrier Count, Module Status, Power System,
and Line Status.
Q: Does the DTX RS485 require a handshake for data transmission?
A: No, the DTX RS485 product line only produces an output stream and does not
require handshake or incoming data for operation.
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>