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CET Electric Technology

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D: DI Status and kWh Imp/Exp indicators. DO Status and kWh Net/Total indicators are reserved.

Figure 3-3 LCD Display

The following table shows the special LCD display symbols:

NO.

Label

Description

A

Voltage

Current

Reserved

C

Measurement Units of Power (kW) and Energy (kWh).

Reserved

D

DI Open

DI Close

Import

Export

Reserved

Table 3-1 LCD Display Symbols

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12
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16
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Содержание PMC-D721MD

Страница 1: ...PMC D721MD Digital Multifunction Meter User Manual Version V1 0 June 25 2018 ...

Страница 2: ... right to make changes without notice Please consult CET or your local representative for the latest product specifications DANGER This symbol indicates the presence of danger that may result in severe injury or death and permanent equipment damage if proper precautions are not taken during the installation operation or maintenance of the device CAUTION This symbol indicates the potential of perso...

Страница 3: ...n During normal operation of the meter hazardous voltages are present on its terminal strips and throughout the connected potential transformers PT and current transformers CT PT and CT secondary circuits are capable of generating lethal voltages and currents with their primary circuits energized Follow standard safety precautions while performing any installation or service work i e removing PT f...

Страница 4: ... liability for any damage caused by meter malfunctions CET accepts no responsibility for the suitability of the meter to the application for which it was purchased Failure to install set up or operate the meter according to the instructions herein will void the warranty Only CET s duly authorized representative may open your meter The unit should only be opened in a fully anti static environment F...

Страница 5: ...ng the Front Panel Buttons 15 3 3 LED Pulse Outputs 15 3 4 Display Screen Types 15 3 5 Setup Configuration via the Front Panel 15 3 5 1 Making Setup Changes 16 3 5 2 Setup Menu 16 3 5 3 Configuration 17 Chapter 4 Applications 18 4 1 Digital Inputs 18 4 2 Pulse Outputs 18 4 3 Basic Measurement 18 4 4 SOE 18 Chapter 5 Modbus Register Map 19 5 1 Basic Measurements 19 5 2 SOE Log 19 5 3 Device Setup 2...

Страница 6: ...CET Electric Technology 6 Appendix B Standards Compliance 25 Appendix C Ordering Guide 26 Contact us 27 ...

Страница 7: ...ing applications The standard SOE Log records meter events such as power off setup changes and DI operations in 1ms resolution With the standard RS485 port and Modbus protocol support the PMC D721MD becomes a vital component of an intelligent multifunction monitoring solution for any DC Power and Energy Management systems You can setup the meter through its front panel or via our free PMC Setup so...

Страница 8: ...munications Standard RS 485 port with Modbus RTU support at 1200 to 19 200 bps equipped System Integration Supported by CET s PecStar iEMS and PMC Setup Easy integration into other Automation SCADA or BMS systems via Modbus RTU 1 3 Getting more information Additional information is available from CET via the following sources Visit www cet global com Contact your local representative Contact CET d...

Страница 9: ...qualified competent personnel that have the appropriate training and experience with high voltage and current devices The meter must be installed in accordance with all local and national electrical codes During the operation of the meter hazardous voltages are present at the input terminals Failure to observe precautions can result in serious or even fatal injury and equipment damage ...

Страница 10: ...vironment with no dust and kept away from heat radiation and electrical noise source Installation steps Remove the installation clips from the meter Fit the meter through a 68mmx68mm cutout as shown in Figure 2 4 Re install the installation clips and push the clips tightly against the panel to secure the meter Figure 2 4 Panel Cutout ...

Страница 11: ...6 Communications Connections The PMC D721MD provides one RS485 port and supports the Modbus RTU protocol Up to 32 devices can be connected on a RS485 bus The overall length of the RS485 cable connecting all devices should not exceed 1200m If the master station does not have a RS485 communications port a RS232 RS485 or USB RS485 converter with optically isolated output and surge protection should b...

Страница 12: ...ions on the PMC D721MD Figure 2 8 Pulse Output Connections 2 8 Power Supply Wiring For AC supply connect the live wire to the L terminal and the neutral wire to the N terminal For DC supply connect the positive wire to the L terminal and the negative wire to the N terminal Figure 2 9 Power Supply Connections ...

Страница 13: ...lluminated during testing The LCD will return to its normal display mode when any button is pressed Figure 3 2 Full LED LCD Display 3 1 2 LCD Display Areas This section provides a description of the LCD display areas The PMC D721MD with LCD display can generally be divided into 4 areas A Measurement symbols for Voltage and Current Other symbols such as THD Unbalance PF Voltage Phase Angle Current ...

Страница 14: ...t Total indicators are reserved Figure 3 3 LCD Display The following table shows the special LCD display symbols NO Label Description A Voltage Current Reserved C Measurement Units of Power kW and Energy kWh Reserved D DI Open DI Close Import Export Reserved Table 3 1 LCD Display Symbols ...

Страница 15: ...a Display mode and Setup Configuration mode Once inside the Setup Configuration mode and at the main menu pressing this button selects a sub menu or a parameter for modification After changing the parameter pressing this button again saves the new setting into memory Table 3 2 Buttons Description 3 3 LED Pulse Outputs The PMC D721MD comes standard with one LED indicator for Energy Pulse Output whi...

Страница 16: ...sword 2 Selecting a parameter to change Use the Power and Energy button to scroll to the desired parameter Press the Setup button to select the parameter Once selected the parameter value will blink 3 Changing and saving a parameter Use the U I Power and Energy buttons to make modification to the selected parameter After modification press the Setup button to save the new value into memory If nece...

Страница 17: ... PULS Energy Pulsing Enable Energy Pulsing YES NO YES ENGY CNST Pulse Constant Pulse Constant 25 100 400 1000 3200 imp kWh 100 kWh Import kWh Import Preset kWh Import 0 to 99 999 999 9 0 kWh Export kWh Export Preset kWh Export 0 to 99 999 999 9 0 IO SET1 Specifies the minimum duration the DI must remain in the Active or Inactive state before a state change is considered to be valid DI1 DI1 Debounc...

Страница 18: ...re DO Energy Pulse Outputs are typically used for accuracy testing Energy pulsing can be enabled from the front panel through the ENGY PULS setup parameter The pulse constant can be configured as 25 100 400 1000 3200 imp kWh through the ENGY CNST setup parameter 4 3 Basic Measurement The PMC D721MD provides following basic measurements which are available through the LCD display or communication V...

Страница 19: ...ble 5 1 Basic Measurements Notes 1 For the DI Status register the bit values of B0 and B1 represent the states of DI1 and DI2 respectively with 1 meaning active closed and 0 meaning inactive open 2 The range of the SOE Pointer is between 0 and 0xFFFFFFFF and it is incremented by one for every new log generated and will roll over to 0 if its current value is 0xFFFFFFFF A value of zero indicates tha...

Страница 20: ...Structure 2 SOE Event Classification Table 5 4 SOE Event Classification Event Classification Sub Classification Status Event Value Description 1 DI Change 1 1 0 1 0 DI1 Inactive DI1 Active 2 1 0 1 0 DI2 Inactive DI2 Active 4 Self diagnosis 1 None None System Parameter Fault 2 Interval Parameter Fault 5 Operations 1 None None Reserved 2 Power Off 3 Set Clock via Front Panel 4 System Parameter Chang...

Страница 21: ...6 0 8N2 1 8O1 2 8E1 3 8N1 4 8O2 5 8E2 Table 5 8 Communication Setup 5 4 Time There are two sets of Time registers supported by the PMC D721MD Year Month Day Hour Minute Second Register 60000 to 60002 and UNIX Time Register 60004 When sending time to the PMC D721MD over Modbus communications care should be taken to only write one of the two Time register sets All registers within a Time register se...

Страница 22: ...0200 60219 RO Meter model1 UINT16 See Note 1 9820 60220 RO Firmware Version UINT16 e g 10000 shows the version is V1 00 00 9821 60221 RO Protocol Version UINT16 e g 10 means V1 0 9822 60222 RO Firmware Update Date Year 2000 UINT16 e g 140110 means January 10 2014 9823 60223 RO Firmware Update Date Month UINT16 9824 60224 RO Firmware Update Date Day UINT16 9825 60225 RO Serial Number UINT32 e g 170...

Страница 23: ...CET Electric Technology 23 9807 0x31 1 9808 0x4D M 9809 0x44 D 9810 9819 0x20 Null Table 5 12 ASCII Encoding of PMC D721MD ...

Страница 24: ...s Dry contact 24VDC internally wetted 20ms minimum Energy Pulse Output Type Pulse Constant Pulse Width LED Solid State Relay 25 100 400 1000 3200 Imp kWh 80ms 20ms Communications RS 485 Baudrate Modbus RTU 1200 2400 4800 9600 19200bps Environmental Conditions Operating Temp Storage Temp Humidity Atmospheric Pressure 25 C to 70 C 40 C to 85 C 5 to 95 non condensing 70 kPa to 106 kPa Mechanical Char...

Страница 25: ...cs of industrial scientific and medical ISM radio frequency equipment EN 55011 2009 A1 2010 CISPR 11 Limits and methods of measurement of radio disturbance characteristics of information technology equipment EN 55022 2010 CISPR 22 Limits for harmonic current emissions for equipment with rated current 16 A EN 61000 3 2 2006 A1 2009 A2 2009 Limitation of voltage fluctuations and flicker in low volta...

Страница 26: ...CET Electric Technology 26 Appendix C Ordering Guide ...

Страница 27: ...gy 27 Contact us CET Inc 8 F Westside Building 201 Terra Industrial Trade park Che Gong Miao Shenzhen Guangdong P R China 518040 Tel 86 755 8341 5187 Fax 86 755 8341 0291 Email support cet global com Web www cet global com ...

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