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Table of Contents
Summary of Contents for DECODE EMU Series
- Page 1 User Manual Electricity Measurement Units...
- Page 2 The use of the product is at sole discretion of the user. Decode cannot be held responsible for any damages arising due to use of this product and makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product.
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Page 3: Table Of Contents
Table of content 1 Preface.........................4 1.1 Symbols............................4 1.2 Safety Instructions........................4 1.3 Document versions........................5 2 Description........................6 3 Installation........................7 4 Functionality.......................8 4.1 Normal mode..........................8 4.2 Setup mode..........................8 5 Modbus communication....................9 5.1 Supported functions........................9 5.1.1 Function 03 - Read Holding Register................9 5.1.2 Function 06 - Preset Single Register................10 5.1.3 Function Error........................11 5.2 Internal Modbus memory map....................12 6 Technical characteristics..................13... -
Page 4: Preface
Do not expose the device to extreme ambient conditions. Protect the device • against dust, moisture and high temperature. www.decode.rs 4/15 EMU_UM_V12_05042020.pdf... -
Page 5: Document Versions
1.3 Document versions Document version Version FW / HW Date Note v1.0 v1.00 / Rev. 141014 09/12/2014 Initial version v1.1 v1.00 / Rev. 060315 26/01/2015 Corrections registry data types v1.2 v1.00 / Rev. 060315 05/04/2020 Formating to new template www.decode.rs 5/15 EMU_UM_V12_05042020.pdf... -
Page 6: Description
Description Description The Decode EMU Series measurement units are AC Voltage or Current Digital Transducers with pure RMS measurement. The digital technology is used to measure voltage, current and frequency in single and three phase designs. Depending of variant, analog measurement of PT100/PT100 temperature sensors and DC currents and voltages may be performed. -
Page 7: Installation
KS1 and KS2 jumpers should be connected only if RS-485 line termination is required. At smaller distances, termination is not required. At distances greater than 100m and in conditions of major interference, termination is required on the slave device that is located at the end of the line. www.decode.rs 7/15 EMU_UM_V12_05042020.pdf... -
Page 8: Functionality
11111 in register 40017. Register 40017 automatically returns the value to 0 after execution command. Exiting the SETUP mode is only possible by powering the unit off and on without holding the SET button. www.decode.rs 8/15 EMU_UM_V12_05042020.pdf... -
Page 9: Modbus Communication
Modbus communication Modbus communication The Decode EMU device supports the Modbus RTU protocol on the RS-485 port. Supported serial speeds are 1200, 2400, 4800, 9600, 19200, 57600 and 115200 bits per second. Supported formats are 8 bit and No Parity, Even Parity or Odd Parity. -
Page 10: Function 06 - Preset Single Register
CRC error check Hi The response consists of 8 bytes: Byte Field name Content Device address Function Register address Hi Register address Low Register number Hi Register number Low CRC error check Lo CRC error check Hi www.decode.rs 10/15 EMU_UM_V12_05042020.pdf... -
Page 11: Function Error
Register number Hi Error code may have folowing values: 1 - Function code not supported 2 - Reading registers out of range (> 40017) 3 - Number of registers out of range (> 17) 4 - Function execution error www.decode.rs 11/15 EMU_UM_V12_05042020.pdf... -
Page 12: Internal Modbus Memory Map
Command for writing registers 40008 - 40016 to non-volatile memory. In SETUP mode, writing 11111 starts the command and returns the register value to 0 after execution. In NORMAL mode, the value does not return to 0 and the command does not execute. www.decode.rs 12/15 EMU_UM_V12_05042020.pdf... -
Page 13: Technical Characteristics
6.3 EMU C3 - Three phase AC current, with CT* Measured parameters AC current CT1, CT2, CT3 Measurement type True RMS Measurement range 0-5A AC rms Resolution Current 1mA rms Frequency 0.01Hz * Must be used with current transformers (CT) with 5A output. www.decode.rs 13/15 EMU_UM_V12_05042020.pdf... -
Page 14: Emu A3-Ttt* - 3 X Analogue Input
Measurement range -50 ºC ~ +150 ºC Resolution 0.01 ºC 6.4.4 Type T = 3 Measured parameters 0-5V DC Measurement range 0-5V DC Resolution 6.4.5 Type T = 4 Measured parameters 0-10V DC Measurement range 0-10V DC Resolution www.decode.rs 14/15 EMU_UM_V12_05042020.pdf... -
Page 15: Product Label
Decode office or return it to Decode. Contact Please contact a Decode office if you have any questions regarding the information contained in this manual or Decode products, or if you have any other inquiries. Decode d.o.o.