CARLO GAVAZZI EM50 User manual

EM50
Energy analyzer for single, two and three-
phase systems
INSTRUCTION MANUAL

CONTENTS
CONTENTS 2
EM50 5
Introduction 5
Components description 5
UCS (Universal Configuration Software) 6
EM50 USE 7
Interface 7
Measurement pages 7
Setting pages 7
Information pages 8
Information and warnings 8
Working with EM50 9
Navigating the menus 9
Basic menu navigation 9
Full menu navigation 9
Settings menu navigation 10
Menu description 10
Basic menu – measurement pages 10
Full menu – information and measurement
pages 11
Settings menu 14
CONFIGURE EM50 17
Configuration mode 17
Configuration via UCS 17
Configuration via keypad 17
Frequently used procedures 18
Set electrical system, CT ratio and VT ratio 18
Set the Modbus parameters 18
Set the BacNET parameters 19
ESSENTIAL INFORMATION 20
Alarm settings 20
Up alarm (higher than) 20
Down alarm (less than) 21
Equal-to-a-value alarm 21
Alarm setpoint 22
Alarm setpoint resolution and hysteresis 23
Outputs configuration 24
Static output 24
Relay output 24
Demand variables (DMD) 25
Calculation 25
Calculation methods 25
Synchronization 28
Metering 29
Measurement side 29
Power factor convention 29
Reactive power calculation 30
Energy resolution 30
Absolute and net energy 30
Database 31
Introduction 31
Event Database 31
Max DMD database 32
Monthly energy database 33
Date and time 35
Date and time settings 35
Daylight savings time 36
Tariff management 37
Tariff management mode 37
Display and keypad 38
Page filter 38
Screensaver 38
Programming lock cap 38
Wiring check 39
Voltage connection check 39
Current connection check 39
MAINTENANCE AND DISPOSAL 40
Cleaning 40
Responsibility for disposal 40
DOWNLOAD 41

EM50
EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 3
Information property
Copyright © 2020, CARLO GAVAZZI Controls SpA
All rights reserved in all countries.
CARLO GAVAZZI Controls SpA reserves the right to apply modifications or make improvements to
the relative documentation without the obligation of advance notice.
Safety messages
The following section describes the warnings related to user and device safety included in this
document:
NOTICE: indicates obligations that if not observed may lead to damage to the
device.
CAUTION! Indicates a risky situation which, if not avoided, may cause data
loss.
IMPORTANT: provides essential information on completing the task that
should not be neglected.
General warnings
This manual is an integral part of the product and accompanies it for its
entire working life. It should be consulted for all situations tied to
configuration, use and maintenance. For this reason, it should always be
accessible to operators.
NOTICE: no one is authorized to open the analyzer. This operation is reserved
exclusively for CARLO GAVAZZI technical service personnel. Protection may be
impaired if the instrument is used in a manner not specified by the
manufacturer.
Service and warranty
In the event of malfunction, fault, requests for information or to purchase accessory modules,
contact the CARLO GAVAZZI branch or distributor in your country.
Installation and use of analyzers other than those indicated in the provided instructions void the
warranty.

EM50
EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 4
Download
This manual www.productselection.net/MANUALS/UK/EM50_im_use.pdf
Installation instruction www.productselection.net/MANUALS/UK/EM50_im_inst.pdf
UCS desktop www.productselection.net/Download/UK/ucs.zip

EM50
EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 5
EM50
Introduction
EM50 is an energy analyzer for single, two and three-phase systems. Depending on the model,
using 5A current transformers, 333mV or 80 mA current sensors or Rogowski coil, it can be
installed in systems with rated voltage up to 600 V L-L.
Equipped with a static output (for pulse transmission) and a relay output (for alarm status or
remote control), It can be easily configured by means of UCS software via RS485 and offers
Modbus RTU communication for data retrieving by any Modbus master (e.g. PLC or SCADA) or by
UWP3.0 by Carlo Gavazzi.
The Measurement Canada version (80 mA or 5 A current inputs) can be used for fiscal purposes
in Canada.
Components description
Part
Description
A
LCD display
B
Terminal protection covers
C
RS485 connections
D
Power supply LED
E
Current connections
F
Push button for page scrolling
G
Sealable locking cap
H
Power supply and voltage connections
I
Static output and relay connections
J
Push button for programming
K
DIN rail mounting springs

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 6
UCS (Universal Configuration Software)
It can connect to EM50 via RS485. The following is possible with UCS:
•configure EM50
•view system status for diagnostics and configuration checks
•download data log and event log (xls format)

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 7
EM50 USE
Interface
EM50 is organized in three menus:
•basic menu: pages used to display energy meters and other electrical variables; the
available pages can be changed setting the page filter (via UCS software or settings
menu)
•settings menu: pages used to change settings (password required)
•full menu: pages that display device info and current settings (password not required)
and all measurement pages without considering the page filter
Measurement pages
Area Description
A Phase or variable reference.
B Variable or energy meter value
C Warnings, information and units of measure
Setting pages
Area Description
A Page number
B Page title and current value/option

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 8
Information pages
Area Description
A Page title and current value/option
Information and warnings
Symbol Description
RS485 communication
Energy value shown is imported
Energy value shown is exported
Inductive load
Capacitive load
Load Size (percentage of the load based on the rated current)

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 9
Working with EM50
Navigating the menus
Section Function
A Basic menu
B Full menu
C Settings menu
(password
required)
Basic menu navigation
Button Function
Go to next page
Go to Full menu
Go to Setting menu
Full menu navigation
Button Function
Go to next page

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 10
Button Function
Go to Basic menu
Go to Setting menu
Settings menu navigation
Button Function
•View mode-> next page
•Editing mode (blinking)->increase value
•View mode -> enter editing mode
•Editing mode (blinking)->->confirm value
•Exit and go to Basic menu
Menu description
Basic menu – measurement pages
Note: the available measurements depend on the type of system set and on the settings of the page filter.
Displayed measurements Descrizione
P (-> kWh) Imported active energy
L1 P (-> kWh) Imported active energy phase 1
L2 P (-> kWh) Imported active energy phase 2
L3 P (-> kWh) Imported active energy phase 3
L1 U (V) Voltage L1-N
L2 U (V) Voltage L2-N
L3 U (V) Voltage L3-N
L1 I (A) Current L1

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Displayed measurements Descrizione
L2 I (A) Current L2
L3 I (A) Current L3
L I (A) Neutral current
P (kW) System active power
L1 P (kW) Active power phase 1
L2 P (kW) Active power phase 2
L3 P (kW) Active power phase 3
F (Hz) Frequency
t Temperature
T1 Device operating time
T2 Load operating time
Full menu – information and measurement pages
Page title Information displayed Type
Uxxxxxx Voltage check wiring
Note: see Wiring check for
further information
Info
Ixxxxxx Current check wiring
Note: see Wiring check for
further information
Info
Addr (*) Modbus address Info
Bd (*) Baud rate Info
Pr (*) Parity Info
Addr (**) MAC Address Info
bd (**) Baudrate Info
InF (**)
Maximum information frame
number
Info

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 12
Page title Information displayed Type
Hu Hardware version Info
Su Firmware version Info
EM50 Model Info
P (-> kWh) Imported active energy Measurement
L1 P (-> kWh) Imported active energy phase 1 Measurement
L2 P (-> kWh) Imported active energy phase 2 Measurement
L3 P (-> kWh) Imported active energy phase 3 Measurement
L1 U (V) Voltage L1-N Measurement
L2 U (V) Voltage L2-N Measurement
L3 U (V) Voltage L3-N Measurement
L1 I (A) Current L1 Measurement
L2 I (A) Current L2 Measurement
L3 I (A) Current L3 Measurement
L I (A) Neutral current Measurement
P (kW) System active power Measurement
L1 P (kW) Active power phase 1 Measurement
L2 P (kW) Active power phase 2 Measurement
L3 P (kW) Active power phase 3 Measurement
F (Hz) Frequency Measurement
t Temperature (internal) Measurement
T1 Device operating time Measurement
T2 Load operating time Measurement
L T1 P (-> kWh)*** Imported active energy, tariff 1
Previous month
Measurement
L T2 P (-> kWh)*** Imported active energy, tariff 2
Previous month
Measurement

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 13
Page title Information displayed Type
L T3 P (-> kWh)*** Imported active energy, tariff 3
Previous month
Measurement
L T4 P (-> kWh)*** Imported active energy, tariff 4
Previous month
Measurement
L T1 P (<- kWh)*** Exported active energy, tariff 1
Previous month
Measurement
L T2 P (<- kWh)*** Exported active energy, tariff 2
Previous month
Measurement
L T3 P (<- kWh)*** Exported active energy, tariff 3
Previous month
Measurement
L T4 P (<- kWh)*** Exported active energy, tariff 4
Previous month
Measurement
M T1 P (-> kWh)*** Imported active energy, tariff 1
Current month
Measurement
M T2 P (-> kWh) *** Imported active energy, tariff 2
Current month
Measurement
M T3 P (-> kWh) *** Imported active energy, tariff 3
Current month
Measurement
M T4 P (-> kWh) *** Imported active energy, tariff 4
Current month
Measurement
M T1 P (<- kWh) *** Exported active energy, tariff 1
Current month
Measurement
M T2 P (<- kWh) *** Exported active energy, tariff 2
Current month
Measurement
M T3 P (<- kWh) *** Exported active energy, tariff 3
Current month
Measurement
M T4 P (<- kWh) *** Exported active energy, tariff 4
Current month
Measurement
--- Exit

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 14
*** not available in Measurement Canada models.
Settings menu
Page title Description Values Default
Pd Enter current password Current password 0000
PrOtC Protocol 0: Modbus RTU
1: BacNET MS/TP
0
Addr (*) Modbus address From 1 to 247 1
bd (*) Baud rate 1200= 1.2 kbps
2400= 2.4 kbps
4600= 4.6 kbps
9600= 9.6 kbps
19200= 19.2 kbps
38400= 38.4 kbps
11520= 115.2 kbps
9600
Pr(*) Parity EvEn: even
odd: odd
non1: no parity, 1 stop bit
non2: no parity, 2 stop bit
non1
Addr (**) MAC Address From 0 to 127 1
bd (**) Baudrate 9600/19200/38400/76800
bps
9600 bps
InF (**)
Maximum information
frame number
From 10 to 255 10
[no title](**) Device instance number From 1 to 4194302 9999
rst(**)
Reset device and apply
BacNET settings
0: no action
1: reset command
0
Pulse Pulse output energy P: active energy
Q: reactive energy
P

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 15
Page title Description Values Default
qCal Reactive power calculation 0: True
1: Generalized
0
Pd Password setting From 0000 to 9999 0000
CAL Measurement side 1: Primary
2: Secondary
1
Lt System 3Ln: 3-phase with neutral
2LL: 3-phase without neutral
1LL: 2-phase
1Ln: 1-phase
3Ln
CT
Current transformer
secondary
AV5 version:
5: 5 A
1: 1 A
MA5 version:
200: 200 mA
100: 100 mA
80: 80 mA
RG5 version:
100: 100 mV @50 Hz
MV5 version:
333: 333 mV
AV5: 5
MA5: 100
RG5: 100
MV5: 60
- Current transformer primary From 1 to 50000 A AV5: 5
MA5: 10
RG5: 1000
MV5: 10
PT
Voltage transformer
secondary
From 50 to 400 V 400 V
- Voltage transformer primary From 50 to 1000000 V 400 V
Pn Pulse weight (pulses/kWh or
pulses/kvarh, referred to
secondary output)
From 1 to 60000 1000
PH Pulse width From 20 to 100 ms 30 ms

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Page title Description Values Default
Fn Energy resolution 0: 1 kWh/kvarh/kVAh
1: 0.1 kWh/kvarh/kVAh
2: 0.01 kWh/kvarh/kVAh
3: 0.001 kWh/kvarh/kVAh
1
uAdd Page filter (add page) From 1 to 25 -
Udel Page filter (remove page) From 1 to 25 -
Ch Wiring check enabling On/off On
dirA Phase 1 current direction 0: Positive
1: Negative
0
dirB Phase 1 current direction 0: Positive
1: Negative
0
dirC Phase 1 current direction 0: Positive
1: Negative
0
(*) Setting available if PrOtC=0 (Modbus RTU)
(**) Setting available if PrOtC=1 (BacNET MS/TP)

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 17
CONFIGURE EM50
Configuration mode
You can configure EM50
•via UCS desktop (PC connected to EM50 via RS485)
•using the keypad
Configuration via UCS
To configure EM50 with UCS:
1. install UCS on your PC:
Application Compatibility Where to find it
UCS desktop
PC Windows 7
or later
www.productselection.net/Download/
UK/ucs.zip
2. Connect the PC to EM50 via RS485 (using a USB to RS485 converter if needed)
3. Power on EM50
4. Start UCS and connect to EM50 via automatic scan or by manually setting correct
communication parameters (default: address 1, baudrate 9600 bps, parity none).
5. Open the settings section, set parameters and save changes.
6. Check correct system operations using the data display and reading tools included in
UCS.
Configuration via keypad
To configure EM50 by keypad:
1. Remove terminal protection covers
2. Power on EM50
3. Enter Settings menu pressing SET
4. Enter correct password (change digit value with SCROLL and confirm with SET)
5. Press SCROLL until you reach the parameter you want to change
6. Enter edit mode with SET
7. Change value with SCROLL
8. Confirm with SET
9. Exit setting menu (long press SCROLL)

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 18
Frequently used procedures
Set electrical system, CT ratio and VT ratio
1. Power on EM50
2. Press SET to enter SETTINGS menu
3. Enter the correct password (press SET to confirm a digit, press SCROLL to change the
value)
4. Press SCROLL until you reach “Lt”
5. Press SET to enter editing mode and SCROLL to select the system (see Settings menu),
SET to confirm.
6. Press SCROLL, set primary current and confirm.
7. Press SCROLL, set secondary current and confirm.
8. Press SCROLL, set primary voltage and confirm.
9. Press SCROLL, set secondary voltage and confirm.
10. Exit menu pressing SCROLL for more than 2 seconds (long press)
Note: As alternative, connect to EM50 via UCS software and change the parameters from the
Settings.
Set the Modbus parameters
11. Power on EM50
12. Press SET to enter SETTINGS menu
13. Enter the correct password (press SET to confirm a digit, press SCROLL to change the
value)
14. If the parameter PrOtC=0, press SCROLL to go to next page, otherwise press SET to enter
editin mode, change it to 0 (SCROLL) and confirm (SET)
15. Press SCROLL to go the next parameter, the Modbus address. If needed, change it (SET
to enter editing mode, SCROLL to change value and SET again to confirm)
16. Repeat the previous step for the following parameters (baudrate and parity)
17. Exit menu pressing SCROLL for more than 2 seconds (long press)
Note: As alternative, connect to EM50 via UCS software and change the parameters from the
Settings.

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Set the BacNET parameters
1. Power on EM50
2. Press SET to enter SETTINGS menu
3. Enter the correct password (press SET to confirm a digit, press SCROLL to change the
value)
4. If the parameter PrOtC=1, press SCROLL to go to next page, otherwise press SET to enter
editin mode, change it to 1 (SCROLL) and confirm (SET)
5. Press SCROLL to go the next parameter, the MAC address. If needed, change it (SET to
enter editing mode, SCROLL to change value and SET again to confirm)
6. Repeat the previous step for the following parameters (baudrate, max information frame
number and Device instance number)
7. Press SCROLL to go the page RST. Press SET, SCROLL, and SET again to confirm 1 (apply
reset)
8. Exit menu pressing SCROLL for more than 2 seconds (long press)

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EM50 - Instruction manual | 2020-05 | © 2020 | CARLO GAVAZZI Controls SpA 20
ESSENTIAL INFORMATION
Alarm settings
EM50 is able to manage 12 alarms linked to the measured variables.
For each variable you have to define
•Controlled variable (Variable to be linked), selectable among the measured variables
•Alarm type (Comparing method)
•Activation threshold (Setpoint)
•Activation delay (On delay)
Up alarm (higher than)
The alarm is activated when the monitored variable exceeds the Setpoint value for a time equal
to the activation delay (Delay) and is deactivated when it drops below.