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Functions
3.6 Digital Input and Output Interface

SICAM P20 P21 P22, 3-phase Current Power Meter, User Manual

E50417-H8940-C558-

4

, Release Date 

06.2018

14

3.6

Digital Input and Output Interface

Binary Input Interface

This product is provided with 2-digit binary inputs interface based on passive dry contact. Terminals are identi-
fied as DI1, DI2 and COM. COM is the common terminal. 

Figure 3-1

Circuit Diagram of Binary Input Interface

Relay Output Interface 

This product is provided with one relay output interfaces for alarm indication or protection control output in many 
conditions. Electric parameter of internal relay: AC 250 V/DC30 V, 3 A.

Figure 3-2

Circuit Diagram of Relay Output Interface

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Summary of Contents for SICAM P20

Page 1: ...ICAM P22 3 phase Current Power Meter V1 40 Manual E50417 H8940 C558 4 Preface Content Overview 1 Technical Data 2 Functions 3 Operation and Display 4 Installation and Wiring 5 Communication 6 Maintenance 7 Ordering Number 8 ...

Page 2: ...tent does not form part of a contract or of business relations nor does it change these All obligations of Siemens AG are stated in the relevant contractual agreements Siemens AG reserves the right to revise this document from time to time Document Version V01 10 01 Release date 06 2018 Copyright Copyright Siemens AG 2015 All rights reserved The disclosure duplication distribution and editing of t...

Page 3: ...d or should particular problems arise which are not covered sufficiently for the purchaser s purpose the matter should be referred to the local Siemens represen tative Our Customer Support Center provides a 24 hour service Phone 49 180 524 7000 Fax 49 180 524 2471 E mail support energy siemens com Notes on Safety This document is not a complete index of all safety measures required for operation o...

Page 4: ... to the standards of safety engineering Proper Use The equipment device module may be used only for such applications as set out in the catalogs and the technical description and only in combination with third party equipment recommended and approved by Siemens Problem free and safe operation of the product depends on the following Proper transport Proper storage setup and installation Proper oper...

Page 5: ... Digital Input and Output Interface 14 4 Operation and Display 15 4 1 Full screen Display 16 4 2 Cyclic Display 16 4 3 Key Definition 17 5 Installation and Wiring 23 5 1 Overall Dimension 24 5 2 Precautions of Installation 24 5 3 Terminals and Wiring Diagram 25 6 Communication 27 6 1 Use of Communication 28 6 2 Introduction of MODBUS RTU Communication Protocol 29 6 2 1 Overview 29 6 2 2 Function o...

Page 6: ...Contents SICAM P20 P21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 6 ...

Page 7: ...SICAM P20 P21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 7 Overview 1 1 1 Introduction 8 1 2 Features 8 ...

Page 8: ...etc This 3 phase electronic multi function power meter meets following standards IEC 62052 11 2003 Electricity metering equipment a c General requirements tests and test conditions Part 11 Metering equipment standard Modbus RTU 1 2 Features This project uses high precision sampling and metering unit and high speed MCU data processing unit sup porting high precision wide range and accurate measurem...

Page 9: ...SICAM P20 P21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 9 Technical Data 2 2 1 Technical Data 10 ...

Page 10: ...gnal Binary output optional 1 electromagnetic relay output Normal Open Contact Contact capacity AC 250 V 3 A DC 30 V 3 A Binary input optional 2 dry contact inputs Opto coupler isolation 4 000 VRMS Communication RS 485 port Interface type Twisted Pair Half Duplex Transmission Communication rate 600 bps 38 400 bps Protocol Modbus RTU Environment Operating temp 25 60 Operating temp limit 35 70 Relat...

Page 11: ...User Manual E50417 H8940 C558 4 Release Date 06 2018 11 Functions 3 3 1 Measurements 12 3 2 Limit violation Alarm 12 3 3 Display and Buttons 13 3 4 Communication 13 3 5 Permission and Security Management 13 3 6 Digital Input and Output Interface 14 ...

Page 12: ...ct type of detected data set threshold of detected data set judg ment condition select output relay for alarm signal Code of various detected data hexadecimal number for Modbus RTU code When code of detected data is FF Limit violation alarm function of such group is off Threshold of detected data threshold judging whether detected value is out of limit different units for dif ferent types of data ...

Page 13: ...and L4 passwords L4 password used for parameter setting and modifying L4 password not for meter reset clearing extreme values and PT CT ratio setting All level default PASSWORD is 000000 2 Parameter setting is available only when this product is in programmable state Steps for entering programming state press and at the same time to enter PASS screen input correct password and press to enter SET s...

Page 14: ...2 digit binary inputs interface based on passive dry contact Terminals are identi fied as DI1 DI2 and COM COM is the common terminal Figure 3 1 Circuit Diagram of Binary Input Interface Relay Output Interface This product is provided with one relay output interfaces for alarm indication or protection control output in many conditions Electric parameter of internal relay AC 250 V DC30 V 3 A Figure ...

Page 15: ...SICAM P20 P21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 15 Operation and Display 4 4 1 Full screen Display 16 4 2 Cyclic Display 16 4 3 Key Definition 17 ...

Page 16: ...9 sec configurable Number of items to be defined with one byte 4 high 4 bits are number of items in display area A while 4 low 4 bits are number of items in display area B 16 items are acceptable to each area At any time display area A and display area B should have at least one cyclic display item Cyclic Display State Cyclic display data in areas A and B can be defined by user User may develop cy...

Page 17: ...t menu 1 Switch between A multi line and B single line display areas 2 Return to previous menu No Display content 1st level Display content 2nd level 1 Current Extreme value 2 Neutral current Extreme value 3 CT ratio 4 Version 5 Device ID 6 Error code Example 1 This screen shows current items At cyclic display mode press or to enter key display mode Press or again to switch to current items In the...

Page 18: ...e decimals part of ratio are not displayed Example 5 This screen shows display items of software version number At cyclic display mode press or to enter key display mode Press or again to switch to display items of software version number In the figure Soft means software version 13 means product specification 121121 means software version date and 00 means serial number of software production Exa...

Page 19: ... parameters Pressing immediately after Sure appears will cancel current alteration NO 1st level menu 2nd level menu Symbol Definition Symbol Definition Range Remarks 1 Communi cation setting Baud rate 600 38400 Default setting 2400 Parity 8E1 8o1 8n1 8n 2 Default setting 8E1 Modbus address 0 247 Default setting 0 Modbus sending delay 0 2999 Default setting 10 DL T645 high 6 address 0 999999 Defaul...

Page 20: ...ng extreme value and PT CT ratio are configurable All default password is 000000 Note The meter should be reset after altering conversion ratio to ensure reasonable correspondence between communication reading and displayed metering data 4 Clearing extreme value Meter reset 5 Display setting Time of returning to cyclic display state when no operation 1 99 Unit min Default setting 10 Time of backli...

Page 21: ...o confirm FAIL will appear if password level and password are wrong To re enter password press To quit and return to cyclic display state enter if specified error count is reached parameter setting function will be locked for certain period which is configurable in advance If the password is validated you may enter the first level menu The figure shows the read write items under Conn menu baud rat...

Page 22: ...Operation and Display 4 3 Key Definition SICAM P20 P21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 22 ...

Page 23: ...21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 23 Installation and Wiring 5 5 1 Overall Dimension 24 5 2 Precautions of Installation 24 5 3 Terminals and Wiring Diagram 25 ...

Page 24: ... mounted to avoid accident arising from vibration 4 For the reason of convenient installation maintenance and operation and safety enough space around this product should be reserved during installation especially when one panel for multiple meters 5 Requirement for electric wiring Stranded fire retarded copper wire over 2 5 mm2 should be used for current circuit 1 5 mm2 stranded fire retarded cop...

Page 25: ...als Note Main terminals are barrier terminals which can be connected using fork or ring type lug no more than 6 5 mm wide For cables to be connected to upper and lower main terminals cold pressed UT2 5 3 terminal is recommended before connection The diagram of connection is below Figure 5 2 Connection Diagram of Main Terminal V V NC NC NC NC Power supply Reserved Reserved Reserved Reserved I11 I12...

Page 26: ...ggable Wiring Diagram Wiring diagram of main terminal is showed below V and V are power supply terminals This product sup ports DC AC input with input voltage 40 V to 420 V Figure 5 3 Wiring Diagram of 3 phase 4 wire W O PT 3 Middle auxiliary terminal common P P DI1 DI2 COM A B NC R11 R12 Reserved Binary input 1 Binary input 2 Common binary input terminal RS485 RS485 Reserved Relay output ...

Page 27: ...SICAM P20 P21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 27 Communication 6 6 1 Use of Communication 28 6 2 Introduction of MODBUS RTU Communication Protocol 29 ...

Page 28: ...s 19 200 bps and 38 400 bps RS485 port of this product should be connected using Shield Twisted Pair When wiring layout of the entire network should be considered length and orientation of communication cable position of upper computer matched resistance at network end point communication converter network scalability network coverage EMI etc Note 1 Wiring should be conducted strictly in accordanc...

Page 29: ... data packet will receive and check the data If no error slave will execute the request in data packet and send the responsive date packet to the master The data packet sent back by slave contains slave Address Function executed Data generated from function execution and CRC Address Address is at the beginning of data packet and consists of an 8 bit data which means slave address specified by the ...

Page 30: ...ation address 0 247 Function code 03 H Number of bytes of data length Content of data Content of data Content of data Low byte of CRC High byte of CRC Device address 03 H 10 H 00 H 00 H 03 H Low check High check Device address 03 H 06 H Data 1 Data 2 Low check High check Device address 0 247 Func tion code 10 H Highbyte of start address of vari able Low byte of start address of vari able Highbyte ...

Page 31: ...lating CRC Preset 16 bit register to hexadecimal FFFF namely all to 1 and this register is called CRC register Execute exclusive OR of low bytes of 1st 8 bit data and 16 bit CRC register and put the result in CRC register Shift the content of register rightwards by one bit towards lower bit and fill the highest bit with 0 Check the lowest bit If the lowest bit is 0 repeat step 3 shift again if it ...

Page 32: ...05 H Clearingextreme value 0006 H unsigned int 2 bytes W Arbitrary value Parity 0020 H unsigned int 2 bytes R W 0 3 0 8E1 1 8o1 2 8n1 3 8n2 Parameter Address Data Type Length R W Data Range Remark Relay output 1 0100 H unsigned int 2 bytes R W 0 1 Write operation is valid when alarm manner control byte is 0 or 2 Binary inputs 0102 H unsigned int 2 bytes R High byte binary input status note Low byt...

Page 33: ...3 H unsigned int 2 bytes R W 0 1 0 over 1 below Alarm port 0114 H unsigned int 2 bytes R W 0 1 0 off 1 alarm output to relay output 1 Alarm 2 0115 H 0119 H 10 bytes R W See Alarm 1 Alarm 3 011A H 011E H 10 bytes R W See Alarm 1 Alarm 4 011F H 0123 H 10 bytes R W See Alarm 1 Alarm 5 0124 H 0128 H 10 bytes R W See Alarm 1 Alarm 6 0129 H 012D H 10 bytes R W See Alarm 1 Parameter Address Data Type Len...

Page 34: ...th R W Data Range Unit Phase A current 1008 H unsigned int 2 bytes R 0 65535 0 001 A Phase B current 1009 H unsigned int 2 bytes R 0 65535 0 001 A Phase C current 100A H unsigned int 2 bytes R 0 65535 0 001 A Average current 100B H unsigned int 2 bytes R 0 65535 0 001 A Neutral current 100C H unsigned int 2 bytes R 0 65535 0 001 A Name Address Data Type Length R W Data Range Unit Phase A current 4...

Page 35: ...SICAM P20 P21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 35 Maintenance 7 7 1 Maintenance 36 ...

Page 36: ... vibration free during installation Upward view of the meter provides the best display effect so it should be installed verti cally The meter should be stored in environment free of condensation at 35 to 70 and 95 humidity in original package At most 5 layers are allowable for stacking The meter is inappropriate for storing after un packing The meter should be stored in clean location free of haza...

Page 37: ...SICAM P20 P21 P22 3 phase Current Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 37 Ordering Number 8 8 1 Ordering Number 38 ...

Page 38: ... Power Meter User Manual E50417 H8940 C558 4 Release Date 06 2018 38 8 1 Ordering Number Model SICAM Function 3I w o communication port P 2 0 3I 1 RS485 P 2 1 3I 2BI 1BO 1 RS485 P 2 2 Model Order No SICAM P20 7KG7321 0AA00 SICAM P21 7KG7321 0AA01 SICAM P22 7KG7321 0AA21 ...

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