CIRCUTOR CEM-C31-T1, CEM-C31-T1-MID, CEM-C31-485-T1, CEM-C31-485-T1-MID, CEM-C31-485-DS Instruction Manual

Multifunctional energy meter

CEM-C31-T1, CEM-C31-T1-MID CEM-C31-485-T1, CEM-C31-485-T1-MID CEM-C31-485-DS, CEM-C31-485-DS-MID

INSTRUCTION MANUAL

(M017B01-03-20B)

CEM-C31

2	Instruction Manual

CEM-C31

SAFETY PRECAUTIONS

Follow the warnings described in this manual with the symbols shown below.

DANGER

Warns of a risk, which could result in personal injury or material damage.

ATTENTION

Indicates that special attention should be paid to a specifi c point.

If you must handle the unit for its installation, start-up or maintenance, the following should be taken into consideration:

Incorrect handling or installation of the unit may result in injury to personnel as well as damage to the unit. In particular, handling with voltages applied may result in electric shock, which may cause death or serious injury to personnel. Defective installation or maintenance may also lead to the risk of fi re.

Read the manual carefully prior to connecting the unit. Follow all installation and maintenance instructions throughout the unit’s working life. Pay special attention to the installation standards of the National Electrical Code.

Refer to the instruction manual before using the unit

In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can result in injury or damage to the unit and /or installations.

CIRCUTOR, SA reserves the right to modify features or the product manual without prior notifi cation.

DISCLAIMER

CIRCUTOR, SA reserves the right to make modifi cations to the device or the unit specifi cations set out in this instruction manual without prior notice.

CIRCUTOR, SA on its web site, supplies its customers with the latest versions of the device specifi cations and the most updated manuals.

www.circutor.com

CIRCUTOR, recommends using the original cables and accessories that are supplied with the device.

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CEM-C31

CONTENTS

SAFETY PRECAUTIONS 3 DISCLAIMER 3 CONTENTS 4 REVISION LOG 5 SYMBOLS 5 1- VERIFICATION UPON RECEPTION 6 2- PRODUCT DESCRIPTION 6 3- DEVICE INSTALLATION 7

3 1- PRELIMINARY RECOMMENDATIONS 7 3 2- INSTALLATION 8 3 3- DEVICE TERMINALS 8 3 3 1 MODEL CEM-C31-T1 8 3 3 2 MODEL CEM-C31-485-T1 9 3 3 3 MODEL CEM-C31-485-DS 9 3 4- CONNECTION DIAGRAM 10 3 5- CONNECTIONS 11

4- OPERATION 13 4 1- BUTTON FUNCTIONS 13 4 2- DISPLAY 14 4 3- LED INDICATORS 15 4 4- IMPULSE OUTPUT (CEM-C31-T1 and CEM-C31-485-T1 models) 15 4 5- DIGITAL INPUT (CEM-C31-485-DS) 16

5- DISPLAY 17 5 1- DISPLAY IN STANDBY MODE 17 5 2- DISPLAY IN READING MODE 20 5 3- INSTANTANEOUS VALUE DISPLAY 21 5 4- PARTIAL ENERGY DISPLAY 23 5 5- IMPULSE COUNT DISPLAY (CEM-C31-485-DS) 26 5 6- MANUFACTURER INFORMATION SCREEN 27

6- CONFIGURATION 29 6 1- RELEVANT PARAMETERS CONFIGURATION 29 6 1 1 VOLTAGE PRIMARY TRANSFORMATION RATIO 29 6 1 2 VOLTAGE SECONDARY TRANSFORMATION RATIO 30 6 1 3 CURRENT PRIMARY TRANSFORMATION RATIO 30 6 1 4 CURRENT SECONDARY TRANSFORMATION RATIO 31 6 1 5 EXITING THE SETUP MENU 31 6 2- GENERAL CONFIGURATION MENU 32 6 2 1 IMPULSE OUTPUT WEIGHT 32 6 2 2 IMPULSE OUTPUT TYPE 33 6 2 3- DIGITAL INPUT TYPE 33 6 2 4 PERIPHERAL ADDRESS 34 6 2 5 TRANSMISSION SPEED ( BAUD RATE) 35 6 2 6 TYPE OF COMMUNICATIONS 35 6 2 7 DISPLAY 36 6 2 8 BACKLIGHT 38 6 2 9 ENERGY COST 38 6 2 10 CO2 EMISSIONS 39 6 2 11 PARTIAL ENERGY METER DELETION 40 6 2 12 EXITING THE SETUP MENU 40

7- COMMUNICATIONS 41 7 1- INFRARED COMMUNICATIONS PORT (Model CEM-C31-T1) 41 7 2- RS-485 COMMUNICATIONS PORT (Models CEM-C31-485-xx) 41 7 2 1- CONNECTION 41 7 2 2- MODBUS PROTOCOL 42 7 2 3- VARIABLES MODBUS 43 8- TECHNICAL FEATURES 48

9- MAINTENANCE AND TECHNICAL SERVICE 51 10GUARANTEE 51 11CE CERTIFICATE 52

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CEM-C31

REVISION LOG

Table 1: Revision log

	Date	Revision	Description
	07/14	M017B01-03-14A	Initial Version
	11/14	M017B01-03-14B	Changes in the following sections:
			4.2. - 4.6
	06/15	M017B01-03-15A	Changes in the following sections:
			2 - 3.5. - 4.4.1. - 4.4.2. - 4.5. - 4.6. - 4.7. - 5
	01/17	M017B01-03-17A	Changes in the following sections:
			2 .- 5. - 8.
	10/17	M017B01-03-17B	Changes in the following sections:
			5.
	07/18	M017B01-03-18A	Changes in the following sections:
			2.- 3.3. - 4.7.3. - 4.7.4. - 4.7.5. - 4.8. - 4.12. - 5.
			Changes in the following sections:
	10/19	M017B01-03-19A	2. - 3.3. - 3.5. - 4.2. - 4.5. - 5.1. - 5.2. - 5.3. - 5.4. -
			5.5. - 5.6. - 6.2. - 7.2.2.2. - 7.2.3. - 8.
	01/20	M017B01-03-20A	Changes in the following sections:
			3.2. - 3.5.
	05/20	M017B01-03-20B	Changes in the following sections:
			8.

SYMBOLS

	Table 2: Symbols
Symbol	Description
	Compliant with the relevant European standards.
	Device covered by European directive 2012/19/EC. At the end of its useful
	life, do not leave the unit in a household waste container. Follow local regu-
	lations on electronic equipment recycling.

DC current

~AC current

Note: The images of the devices are solely for the purpose of illustration and may differ from the original device.

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CEM-C31

1- VERIFICATION UPON RECEPTION

Check the following points upon receiving the device:

a)The device meets the specifications described in your order.

b)The device has not suffered any damage during transport.

c)Perform an external visual inspection of the device prior to switching it on.

d)Check that it has been delivered with the following:

-An installation guide.

-Safety label (terminal cover).

If any problem is noticed upon reception, immediately contact the transport company and/or CIRCUTOR's after-sales service.

2- PRODUCT DESCRIPTION

The CEM-C31 static three-phase energy meter measures class B active energy (EN50470) / class 1(IEC 62053-21) and (optional) class 2 reactive energy (IEC 62053-23).

The current is measured with the transformer.

The device features:

-2 buttons that allow you to browse the different screens and program the device.

-2 Verification LEDs.

-LCD display, displays all parameters,

-2 connection seals,

-2 terminal covers, to cover the top of the terminal box and the fixing screws.

-RS-485 communications (CEM-C31-485-xx models).

-Optical communications port for communications with other modules installed on a DIN rail with a service port (CEM-C31-T1 model).

-Impulse output (models CEM-C31-T1 and CEM-C31-485-T1).

-Digital input (model CEM-C31-485-DS).

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CEM-C31

3- DEVICE INSTALLATION

3.1.- PRELIMINARY RECOMMENDATIONS

In order to use the device safely, it is critical that individuals who handle it follow the safety measures set out in the standards of the country where it is being used, use the necessary personal protective equipment, and pay attention to the various warnings indicated in this instruction manual.

The CEM-C31 device must be installed by authorised and qualified staff.

The power supply plug must be disconnected and measuring systems switched off before handling, altering the connections or replacing the device. It is dangerous to handle the device while it is powered.

Also, it is critical to keep the cables in perfect condition in order to avoid accidents, personal injury and damage to installations.

The manufacturer of the device is not responsible for any damage resulting from failure by the user or installer to observe the warnings and/or recommendations set out in this manual, nor for damage resulting from the use of non-original products or accessories or those made by other manufacturers.

If an anomaly or malfunction is detected in the device, do not use the device to take any measurements.

Inspect the work area before taking any measurements. Do not take measurements in dangerous areas or where there is a risk of explosion.

Disconnect the device from the power supply (device and measuring system power supply) before maintaining, repairing or handling the device's connections.

Please contact the after-sales service if you suspect that there is an operational fault in the device.

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CEM-C31

3.2.- INSTALLATION

On the side of the device are all of the indications adjusted to the CEI 62052-11 standard.

The device is installed on a DIN rail. All electrical connections must be covered by the plastic covers, and only the display and keypad should remain exposed.

Terminals, opening covers or removing elements can expose parts that are hazardous to the touch while the device is powered. Do not use the device until it is fully installed.

3.3.- DEVICE TERMINALS

3 3 1 MODEL CEM-C31-T1

Table 3:List of CEM-C31-T1 terminals

Device terminals

1	: S1, Current input L1	8	: L3, Voltage input L3
2	: L1, Voltage input L1	9	: S2, Current output L3
3	: S2, Current output L1	11 : N, Neutral connection
4	: S1, Current input L2	13		: Auxiliary Power Supply
5	: L2, Voltage input L2	14		: Auxiliary Power Supply
6	: S2, Current output L2	21		: Impulse output (Collector)
7	: S1, Current input L3	22		: Impulse output (Emitter)

Figure 1:Terminals of the CEM-C31-T1

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CEM-C31

3 3 2 MODEL CEM-C31-485-T1

Table 4:List of CEM-C31-485-T1 terminals

Device terminals

1	: S1, Current input L1																		9 : S2, Current output L3
2	: L1, Voltage input L1																		11 : N, Neutral connection
3	: S2, Current output L1																13				: Auxiliary Power Supply
4	: S1, Current input L2																14				: Auxiliary Power Supply
5	: L2, Voltage input L2																21				: Impulse output (Collector)
6	: S2, Current output L2																22				: Impulse output (Emitter)
7	: S1, Current input L3																		23: B(-), RS-485
8	: L3, Voltage input L3																		24: A(+), RS-485

Figure 2:Terminals of the CEM-C31-485-T1 and CEM-C31-485-DS

3 3 3 MODEL CEM-C31-485-DS

Table 5:List of CEM-C31-485-DS terminals

Device terminals

1	: S1, Current input L1	9 : S2, Current output L3
2	: L1, Voltage input L1	11 : N, Neutral connection
3	: S2, Current output L1	13 : Auxiliary Power Supply
4	: S1, Current input L2	14 : Auxiliary Power Supply
5	: L2, Voltage input L2	21: Digital input
6	: S2, Current output L2	22: Digital input (common)
7	: S1, Current input L3	23: B(-), RS-485
8	: L3, Voltage input L3	24: A(+), RS-485

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CEM-C31

3.4.- CONNECTION DIAGRAM

				Power
				Supply
			S2	S1	L1
	S2	S1	P2	P1
					L2
S2	P2		P1
	S1				L3
P2	P1
LOAD					N

Figure 3: Connection diagram, CEM-C31

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1.5 mm2 ( 1.5 mm2 with end sleeve ) ≤ 0.6 Nm

flat head (3 x 0.5 mm)

16 mm2 ( 10 mm2 with end sleeve ) ≤ 1.2 Nm

CEM-C31

3.5.- CONNECTIONS

The CEM-C31 has terminal covers to cover the top of the terminal box and the fixing screws (Figure 4).

Figure 4: Terminal covers of the CEM-C31

The fixing screws are of the mixed type, allowing the use of PZ2 and flat head screwdrivers.

Table 6:CEM-C31 connections

Connections

Measurement terminals (1, 2 3, 4, 5, 6, 7, 8, 9, 11)

Maximum cable cross-section

Screwdrivers head PZ2

Impulse output terminals / Digital input (21, 22), Power supply (13, 14) and RS-485 (23, 24)

Maximum cable cross-section

Screwdrivers head

Once connected, the device can be protected with two connection seals (Figure 5).

Figure 5: Seal of the CEM-C31

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CEM-C31

Once the device is powered, attach the safety label (Figure 6) to terminals 13 and 14 to seal the device.

	13	14
13	14

Figure 6: Attaching the safety label

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CEM-C31

4- OPERATION

The CEM-C31 is an energy meter capable of measuring:

Imported and exported active energy and reactive energy in the four quadrants.

(according to version).

Active, reactive and apparent power (according to version).

RMS voltage and current.

Power factor, PF

4.1.- BUTTON FUNCTIONS

The CEM-C31 has 2 buttons that allow you to browse the different screens and program the device.

The button can be sealed to prevent access to the programming of the most relevant parameters.

To seal the button, insert the seal through the slot found under the button, Figure 7.

Figure 7: Sealing the button

Button functions on the measuring screens (Table 7):

Table 7: Button functions on measuring screens

Button	Short press	Long press (> 2 s)
	For the cyclic movement.	Enters reading mode.
	Next screen.
	Enter the programming menu	-

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CEM-C31

4.2.- DISPLAY

The device has an LCD where all parameters are displayed. The display is divided into three areas (Figure 8):

COM MAX DEM HOURS kgC02 COST PAR T1 T2
Indicator	Data line
kWh %PF	Units
kVArh L

Figure 8: CEM-C31 Display areas

 Data line, displaying the values measured by the device.

Units, where the unit of the magnitude being viewed is shown.

Indicators, which shows other parameters:

COM, indicates that there is a communications module connected. It flashes when the communications are established.

HOURS, displays the time in hours.

kgCO2, displays the quantity of kgCO2 released into the atmosphere according to the energy consumed.

COST, indicates that the variable displayed in the data line is a cost.

PAR, indicates that the variable displayed in the data line is a partial meter. T1 and T2, indicate the tariff corresponding to the on-screen information.

L1 - L2 - L3 - Indicates the presence of voltage in each phase, with its corresponding current direction:

“- “ is used to show the power yielded to the network.

““ is used to show the power absorbed by the network.

Indicates that the energy being viewed is generated.

Indicates that the energy being viewed is consumed.

Indicates that the energy is inductive.

Indicates that the energy is capacitive.

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CEM-C31

4.3.- LED INDICATORS

The device has two verification LEDs:

To verify the active energy

To verify the reactive energy (according to version).

The weight of the LEDs is 20,000 imp/kWh (kvarh).

The LEDs will remain lit when the current is lower than the energy meter start-up current. Once the start-up current is exceeded (due to active or reactive power consumption) the LEDs are turned off and emit impulses that are proportional to the measured energy.

Active LED

Reactive LED

Figure 9:LED Indicators of the CEM-C31

4.4.- IMPULSE OUTPUT (CEM-C31-T1 and CEM-C31-485-T1 models)

The energy meter has optocoupler type outputs capable of generating impulses at a previously programmed rate. (See “6.2.1. IMPULSE OUTPUT WEIGHT” and ”6.2.2. IMPULSE OUTPUT TYPE” )

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CEM-C31

4.5.- DIGITAL INPUT (CEM-C31-485-DS)

The CEM-C31-485-DS model features a impulse input (terminals 21 and 22 in Table 5), to calculate other supplies or select tariffs.

5 V DC

470 Ω	COMM
21	22

Figure 10: Digital input, CEM-C31-485-DS

Active Tariff selection:

Table 8: Tariff selection

Tariff

Tariff selection

21 22

Tariff 1

21 22

Tariff 2

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CEM-C31

5- DISPLAY

The CEM-C31 has 2 display modes:

Display in standby mode

Display in reading mode

5.1.- DISPLAY IN STANDBY MODE

With the display in standby mode, all of the information is presented in cyclic form without any need to perform any action on the CEM-C31 buttons.

This mode displays different parameters, see Table 9 and Table 10, that alternate every 6 seconds.

The device is in this mode by default when none of the buttons are pressed.

Short press the button to stop the cyclic movement of the parameter being shown at the time.

From then on, short press the button to browse all the parameters defined in Table 9 and

Table 10.

Table 9: Standby mode displays (Table 1)

Models CEM-C31-T1, CEM-C31-485-T1, CEM-C31-485-DS

(Impulse count option(1))

Screen

Parameters

Total imported active energy

Total exported active energy

Only displayed in the 4-quadrant version.

Reactive energy quadrant L+ total (2)

Reactive energy quadrant L- total (2)

Only displayed in the 4-quadrant version.

Reactive energy quadrant C- total (2)

Only displayed in the 4-quadrant version.

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CEM-C31

Table 9 (Continuation): Standby mode displays (Table 1)

Screen

Parameters

Reactive energy quadrant C+ total (2)

(1)The impulse count option for the CEM-C31-485-DS model can be configured in section “6.2.3.-

DIGITAL INPUT TYPE”

(2)Only displayed if the reactive energy display option has been selected in the setup menu ( see

“6 2 7 2 REACTIVE ENERGY DISPLAY”).

	Table 10: Standby mode displays (Table 2)
	Model CEM-C31-485-DS (Tariff option(3))
Screen	Parameters
	T1
kWh	Imported active energy Tariff 1
	T1
	Exported active energy Tariff 1
kWh	Only displayed in the 4-quadrant version.
	T1
	Reactive energy quadrant L+ Tariff 1 (4)
kVArh L
	T1
	Reactive energy quadrant L- Tariff 1 (4)
	Only displayed in the 4-quadrant version.
kVArh L
	T1
	Reactive energy quadrant C- Tariff 1 (4)
	Only displayed in the 4-quadrant version.
kVArh	C
	T1

Reactive energy quadrant C+ Tariff 1 (4)

kVArh C

T2

Imported active energy Tariff 2

kWh

T2

	Exported active energy Tariff 2
kWh	Only displayed in the 4-quadrant version.

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