CET PMC-512-D User manual

PMC-512-D
DC Multi-Circuit Power Monitor
User Manual
Version: V1.0
December 6, 2018

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CET Inc.
This manual may not be reproduced in whole or in part by any means without the express
written permission from CET.
The information contained in this Manual is believed to be accurate at the time of
publication; however, CET assumes no responsibility for any errors which may appear here
and reserves the right to make changes without notice. Please consult CET or your local
representative for latest product specifications.
Standards Compliance
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 personal injury or equipment damage if proper
precautions are not taken during the installation, operation or maintenance of the device.

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DANGER
Failure to observe the following instructions may result in severe injury or
death and/or equipment damage.
Installation, operation and maintenance of the meter should only be
performed by 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.
Ensure that all incoming AC power and other power sources are turned OFF
before performing any work on the meter.
Before connecting the meter to the power source, check the label on top of
the meter to ensure that it is equipped with the appropriate power supply,
and the correct voltage and current input specifications for your application.
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 fuses, shorting CT secondaries, …etc).
Do not use the meter for primary protection functions where failure of the
device can cause fire, injury or death. The meter should only be used for
shadow protection if needed.
Under no circumstances should the meter be connected to a power source if
it is damaged.
To prevent potential fire or shock hazard, do not expose the meter to rain or
moisture.
Setup procedures must be performed only by qualified personnel familiar
with the instrument and its associated electrical equipment.

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Limited warranty
CET offers the customer a minimum of 12-month functional warranty on the
meter for faulty parts or workmanship from the date of dispatch from the
distributor. This warranty is on a return to factory for repair basis.
CET does not accept 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. Failure to do so may
damage the electronic components and will void the warranty.

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Table of Contents
Chapter 1 Introduction............................................................................................................................. 8
1.1 Overview.................................................................................................................................... 8
1.2 Features .....................................................................................................................................8
1.3 PMC-512-D’ application in Monitoring Management Systems ...............................................10
1.4 Getting more information........................................................................................................10
2.1 Appearance..............................................................................................................................11
2.1.1 Main Unit ..................................................................................................................... 11
2.1.2 CTs................................................................................................................................12
2.1.3 Switching Power Supplies ............................................................................................12
2.2 Unit Dimensions.......................................................................................................................12
2.3 Overall Setup ........................................................................................................................... 13
2.4 Mounting .................................................................................................................................13
2.4.1 Mounting PMC-512-D with 35mm DIN Rail .................................................................13
2.4.2 CTs Dimensions and Terminal Definitions....................................................................14
2.4.3 Switching Power Supply...............................................................................................17
2.5 Wiring Connections..................................................................................................................17
2.5.1 PMC-512-D Wiring ....................................................................................................... 17
2.5.2 Mains Hall Effect CT Wiring..........................................................................................19
2.5.3 Residual Current Hall Effect CT Wiring.........................................................................20
2.5.4 Branch Circuits Hall Effect CT Wiring ........................................................................... 20
2.5.5 Mains & Branch Circuits Hall Effect CT wiring (sharing the same PMC-DP).................21
2.5.6 Communications Wiring...............................................................................................21
2.5.7 Digital Input Wiring ......................................................................................................22
2.5.8 Analog Input Wiring .....................................................................................................22
2.5.9 Digital Output Wiring ...................................................................................................22
2.5.10 Power Supply Wiring.................................................................................................. 22
Chapter 3 User Interface ........................................................................................................................ 23
3.1 Front Panel LED Indicators....................................................................................................... 23
3.2 Front Panel Buttons ................................................................................................................. 24
3.2.1 PMC-512-D Transducer Version...................................................................................24
3.2.2 Buttons on LCD PMC-512-D (Future) ........................................................................... 24
3.3 Data Display (Optional with the Future LCD Version).............................................................. 25
3.3.1 Auto-Scroll....................................................................................................................25
3.3.2 Metering ......................................................................................................................25
3.3.3 Alarm Status.................................................................................................................25
3.3.4 DI/DO Status ................................................................................................................ 26
3.3.5 SOE Log ........................................................................................................................26
3.3.6 Information ..................................................................................................................26
3.4 Setup and Maintenance via the Front Panel ...........................................................................26
3.4.1 Making Setup Changes................................................................................................. 26
3.4.2 Setup Menu..................................................................................................................28

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3.4.3 Configuration ............................................................................................................... 29
3.4.4 Maintenance ................................................................................................................31
Chapter 4 Applications ........................................................................................................................... 32
4.1 Inputs and Outputs..................................................................................................................32
4.1.1 Digital Inputs ................................................................................................................32
4.1.2 Analog Input.................................................................................................................32
4.1.3 Energy Pulse Outputs...................................................................................................32
4.2 Power, Energy and Demand ....................................................................................................33
4.2.1 Basic Measurements....................................................................................................33
4.2.2 Energy Measurements .................................................................................................33
4.2.3 Demands ......................................................................................................................33
4.3 Alarm Setpoints .......................................................................................................................34
4.3.1 Alarm Status.................................................................................................................34
4.3.2 Universal Hysteresis and Current ON/OFF Status........................................................34
4.3.3 Voltage Alarms and ON/OFF Status .............................................................................35
4.3.4 Mains Current Alarms ..................................................................................................37
4.3.5 DC Residual Current Alarm ..........................................................................................38
4.3.6 SM Current Alarm ........................................................................................................39
4.3.7 AI Alarm ....................................................................................................................... 41
4.3.8 DI Alarm .......................................................................................................................42
4.4 Data Logging ............................................................................................................................43
4.4.1 Peak Demand Log.........................................................................................................43
4.4.2 Monthly Energy Log .....................................................................................................43
4.4.3 SOE Recorder ............................................................................................................... 43
4.4.4 Data Recorder Log........................................................................................................ 43
Chapter 5 Modbus Register Map ........................................................................................................... 45
5.1 Status Register .........................................................................................................................45
5.1.1 General Status..............................................................................................................45
5.1.2 Instantaneous Alarm.................................................................................................... 46
5.1.3 Latched Alarm ..............................................................................................................47
5.2 Basic Measurements................................................................................................................48
5.3 Energy Measurements.............................................................................................................48
5.4 Monthly Energy Log................................................................................................................. 48
5.5 Demands..................................................................................................................................49
5.5.1 Present Demands .........................................................................................................49
5.5.2 Peak Demand Log of This Month (Since Last Reset) ....................................................50
5.5.3 Peak Demand Log of Last Month (Before Last Reset)..................................................50
5.6 Log Register .............................................................................................................................50
5.6.1 SOE Log ........................................................................................................................50
5.6.2 Data Recorder Log........................................................................................................51
5.7 Device Setup ............................................................................................................................51
5.7.1 Basic Setup Parameters ...............................................................................................51
5.7.2 AI Setup........................................................................................................................ 52
5.7.3 DI Setup........................................................................................................................ 52

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5.7.4 Communication Setup Parameters ..............................................................................52
5.7.5 Alarm Setup .................................................................................................................53
5.7.6 SM Setup Parameters .................................................................................................. 54
5.7.7 Data Recorder Setup ....................................................................................................55
5.8 Time Registers.......................................................................................................................... 55
5.9 Clear/Reset Control .................................................................................................................55
5.10 Remote Control......................................................................................................................56
5.11 Meter Information .................................................................................................................56
Appendix A - SOE Event Classification .................................................................................................... 58
Appendix B - Data Recorder Parameters................................................................................................ 60
Appendix C - Technical Specifications .................................................................................................... 61
Appendix D - Accuracy Specifications..................................................................................................... 62
Appendix E - Standards Compliance....................................................................................................... 63
Appendix F - Ordering Guide .................................................................................................................. 64
Contact us............................................................................................................................................... 65

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Glossary
CET = CET Electric Technology
AI = Analog Input
DI = Digital Input
DMD = Demand
DO = Digital Output
FIFO = First In First Out
LED = Light Emitting Diode
MB = Mega Byte
PDU = Power Distribution Unit
RTC = Real Time Clock
SM = Sub Meter
SOE = Sequence of Events

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Chapter 1 Introduction
This manual explains how to use the PMC-512-D DC Multi-Circuit Power Monitor.
This chapter provides an overview of the PMC-512-D and summarizes many of its key features.
1.1 Overview
The PMC-512-D Multi-Circuit Power Monitor is CET’s latest offer for Data Center, Telecom Base Station,
Renewable Energy, Commercial Building and Industrial Automation applications that require Direct
Current (DC) multi-circuit monitoring. Housed in compact DIN Rail Mountable enclosure, the PMC-512-
D is perfectly suited for applications that have high density metering requirements. The PMC-512-D
features quality construction with multifunction and high-accuracy measurements, one Mains Input and
up to 12 Branch Circuit Inputs. The PMC-512-D comes standard with 13 Digital Inputs for status
monitoring, one Relay Output for control or alarming as well as one Analogue Input for temperature
measurement or other analogue input applications. The standard SOE Log records all setup changes,
alarms and DI/DO operations in 1ms resolution. With dual RS-485 as standard feature supporting
Modbus RTU, the PMC-512-D can easily be deployed in a centralized monitoring and control system such
as CET’s PecStar® iEMS, for a DC Power Distribution Network.
Typical Applications
Data Center DC Power Monitoring
Photovoltaic DC Distribution Boards
Telecom Base Station DC PDUs
Other DC Power Distribution Applications
The above are just a few of the many applications. Contact CET Technical Support should you require
further assistance with your application.
1.2 Features
Ease of use
Status LEDs - Run, Pulse and Comm. Activities
Self-Diagnostic function
Password-protected setup via the Front Panel (Future)
Compact, DIN Rail Mount for easy installation
Measurements
Mains Measurements
Option A (Mains Current Type = Incomer Current):
•Voltage
•Current, %Loading, Power and Energy
•Present Demand, Peak Demand for This Month and Last Month,
Option B (Mains Current Type = Residual Current):
•Voltage
•Residual Current

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SM 1-12 Measurements (12 Branch Circuits Inputs)
Current, %Loading, Power, and Energy
Present Demand, Peak Demand for This Month and Last Month
Logs
Data Recording
4MB Log Memory
Up to 60 parameters @ min. 1-min recording interval for a max. 5,000 logs with timestamps
24 Monthly Energy Logs – kWh for Mains and each SM
SOE Log
512 FIFO events time-stamped to ±1ms resolution
DI/DO changes, Alarms, Setup changes, Self-Diagnosis
Alarming
4 Alarm Levels for Current and AI
2 Alarm Levels for Voltage and Residual Current
Status Input Alarm
Programmable Digital Output Trigger
Facilitate the comprehensive monitoring and alarming for Mains & 12 Sub-Meters.
Inputs and Outputs
13xDI, external excitation @ 48VDC or 240VDC
1xDO, mechanical relay output @ 250VAC/5A or 30VDC/5A
1xAI (0-20mA or 4-20mA)
LED Energy Pulse Output
Communications
2xRS-485, Modbus RTU protocol
Baud rate @ 1,200 to 57,600bps