Grundfos CU 361 Bedienungsanleitung

CONTENTS Page

1. Symbols used in this document 6

2. Product description 7

2.1 Indicator lights 7

2.2 Terminals 7

2.3 Potentially explosive environments 8

3. Identification 8

3.1 Type key 8

4. Installation 8

4.1 Location 9

4.2 Enclosure class 9

4.3 Terminals 9

4.4 Cables 9

5. Mechanical installation 9

6. EMC-correct installation 10

6.1 Internal GENIbus connection to the

IO 351 and IO 111 11

6.2 Fieldbus communication interface

modules 11

6.3 Fitting the CIM module 11

7. Start-up 13

8. Technical data 13

9. Electrical data 13

9.1 Supply voltage 13

9.2 Power consumption 13

9.3 Circuit breaker 13

9.4 Digital inputs 13

9.5 Analog inputs 13

9.6 Digital outputs (relay outputs) 13

9.7 Conductors 13

9.8 Battery backup (UPS) 14

9.9 Terminal groups 14

10. Overview of inputs and outputs 15

11. Maintenance 16

12. Service 16

13. Replacing the CU 361 16

13.1 Replacing the CIM module 16

14. Dimensions 16

15. Disposal 16

1. Symbols used in this document

Warning

Prior to installation, read these

installation and operating instructions.

Installation and operation must comply

with local regulations and accepted

codes of good practice.

Warning

If these safety instructions are not

observed, it may result in personal

injury!

Caution

If these safety instructions are not

observed, it may result in malfunction

or damage to the equipment!

Note

Notes or instructions that make the job

easier and ensure safe operation.

2. Product description

The CU 361 is a control unit designed for Dedicated

Controls systems. The CU 361 is used for the control

and monitoring of one or two pumps in a wastewater

pit.

Fig. 1 CU 361

2.1 Indicator lights

The CU 361 has one green and one red indicator

light.

The green indicator light is on when the power

supply has been switched on.

The red indicator light is on when the system is in a

state of warning or has been stopped due to a fault.

2.2 Terminals

Fig. 2 Back of CU 361

Warning

If the CU 361 is used in a manner not

specified by the manufacturer, the

protection provided by the CU 361 may

be impaired.

TM04 2394 2508

Pos. Description

1LCDdisplay

2Changes to next column in menu

structure

3 Changes to help text

4 Goes up in lists

5 Goes down in lists

6Increases the value of a selected

parameter

7Reduces the value of a selected

parameter

8 Goes one display back

9 Goes back to the Status menu

10 Saves a value

11 Green indicator light (operation)

12 Red indicator light (alarm)

13 Changes the contrast of

the display

1213

CU 361

TM04 2064 2508

Pos. Description

1 Nameplate

2 Terminals for digital output relays

3 Terminals for analog inputs

4 Service connection

5 Ethernet (RJ45)

6 Voltage indicator

7 Terminals for digital inputs

8 Terminals for backup battery

9 Terminals for CIM module (optional)

10 Cable clamps for GENIbus connections

11 Internal GENIbus connection

12 Terminal for power supply

13 Label for backup battery

0V 12V

2.3 Potentially explosive environments

The CU 361 must not be installed in explosive

environments, but may be used together with

Grundfos pumps approved for installation in

potentially explosive environments.

3. Identification

The CU 361 can be identified by means of the

nameplate on the back. See fig. 3.

Fig. 3 Nameplate

The CU 361 has a label for backup battery.

See fig. 4.

Fig. 4 Label for backup battery

Fig. 5 Protective earth terminal

3.1 Type key

4. Installation

The CU 361 is only intended for factory wiring.

Before installation, check that the CU 361

• corresponds to the one ordered.

• is suitable for the supply voltage and frequency

on the installation site.

• has not been damaged during transportation.

The installation must be carried out by authorised

personnel in accordance with local regulations.

All safety regulations must be observed on the

installation site.

TM04 0453 2308

Pos. Description

1 Type designation

2 Product number and version number

3 Serial number

4 Production code (year, week)

5 Rated voltage, frequency and power

TM04 2367 2408TM00 5827 3408

Type

Made in Thailand

96161750

Product No.

Serial No.

.c.

OPEN TYPE PROCESS

CONTROL EQUIPMENT

100-240 Vac 50/60Hz - Max. 22W

CU 361

96787482 - VO1

0536

0811

30 XP

12V dc

Battery powered

0V 12V

96801950

Code Example CU 3 6 1

CU Control unit

36 Controller series

1 Model number

Warning

Switch off the power supply prior to

installation. It must be ensured that

it cannot be accidentally switched on.

Warning

The terminals L and N as well as 70 to

75 may be connected to dangerous

contact voltage. External control

voltage from other groups may occur.

Warning

All wires to units outside the control

panel must be of the type H05VV-F

according to CENELEC HD21 (to avoid

injury from touching wires).

For USA and Canada

Field wiring installation shall comply

with National Electrical Code (NEC)

and/or Canadian Electrical Code.

Warning

The installation must incorporate a

circuit breaker in order to switch off the

mains supply. It must be close to the

CU 361 and easily accessible for the

operator. It must be marked as circuit

breaker for the CU 361. The circuit

breaker must be according to

IEC 60947-1 and IEC 60947-3.

4.1 Location

The CU 361 is designed for installation in the front of

a control panel or a separate cabinet.

For outdoor installation the CU 361 must be mounted

in a control cabinet with an enclosure class of

minimum IPX4.

4.2 Enclosure class

The CU 361 is IP54 when mounted in the front of an

IPX4 enclosure. The cabinet must be of a flame-

retardant material.

For USA and Canada

The CU 361 is type 3R when mounted in the front of

a cabinet with type rating 1, 2, 3, 3R, 5, 12, 12K or

13.

4.3 Terminals

All terminals are suitable for conductors of 0.5 to

2.5 mm2or AWG 20-13.

4.4 Cables

Cables must be rated min. 70 °C.

5. Mechanical installation

Fasten the CU 361 with the four screws, M5 x 10,

supplied with the unit (pos. 1).

Maximum torque: 1.4 Nm.

Dimensions of the CU 361, see section

14. Dimensions.

Fig. 6 Mounting in panel front (standard)

Connect the earth terminal (between the cable

clamps) on the CU 361 to the mounting frame

(pos. 2, fig. 6). See fig. 7.

Fig. 7 Earth connection

TM03 1301 4105

Note

In order to achieve enclosure class

IP54, the CU 361 must be mounted

in a panel or cabinet.

TM04 2066 1908

Min. 1.5 mm

Max. 3 mm

6. EMC-correct installation

The CU 361 is normally mounted in a panel which

also contains an IO 351 module, frequency

converters, contactors and other power equipment.

In order to ensure a faultless function, it is very

important to install the electronic modules in an

EMC-correct way:

• Ensure a sufficient earth connection between the

CU 361 and the frame. See fig. 7.

• Use screened cables for GENIbus. Connect the

screen to the cable clamp of the CU 361 in front

of the terminals A1, Y1 and B1. See fig. 8. Also

use screened cable for the CIM module.

Fig. 8 Screen fixed with cable clamp

• Signal conductors for digital and analog inputs

and outputs should be screened, i.e. run the

screen all the way to the CU 361 and connect it to

frame with for instance a cable clamp.

Alternatively, the signal conductors in the panel

may be unscreened if the panel is divided into a

power and a low-voltage area. Unscreened signal

conductors must not run in the power area, but

exclusively in ducts in the low-voltage area.

• Do not twist screen ends to avoid pig tails, as this

will destroy the s creen effect at high frequencies.

Use cable clamps instead.

TM04 2065 1908

Note

Any isolating plastic tape between

screen and sheath must be removed

before mounting the cable in the cable

clamp.

6.1 Internal GENIbus connection to the IO 351 and IO 111

The CU 361, IO 351 and IO 111 communicate via GENIbus.

Fig. 9 GENIbus connection to the IO 351 and IO 111* (* optional)

6.2 Fieldbus communication interface

modules

The CU 361 can be connected to an external

communication network via an add-on fieldbus

CIM module.

A CIM module is a Communication Interface Module.

The following CIM modules are available*:

• CIM 050 RS-485

• CIM 200 Modbus

• CIM 250 GSM

• CIM 270 GRM (Grundfos Remote Management)

* More modules will be available in the future.

The CIM modules must be ordered separately.

The connection of the CIM module is described in

the installation and operating instructions supplied

with the module.

6.3 Fitting the CIM module

The CIM module must be fitted by authorised

personnel.

Fit the CIM module as follows:

1. Remove the screw in the back cover of the

CU 361. See fig. 10.

Fig. 10 Removing the screw holding the back

cover

TM04 2395 2508

IO 351

IO 111

CU 361

Warning

Switch off the power supply to the

CU 361 before fitting the CIM module.

Warning

Electrostatic discharge (ESD) must be

avoided when fitting the CIM module,

for instance by wearing an antistatic

wrist strap as shown in fig. 12.

TM04 2402 2508

2. Open the back cover and break off the tap.

See fig. 11.

Fig. 11 Opening the back cover and breaking off

the tap

3. Fit the CIM module. See fig. 12.

Fig. 12 Fitting the CIM module

4. Place the labels supplied with the CIM module on

the back cover. See fig. 13.

Fig. 13 Placing the new labels on the back cover

5. Refit the back cover to the CU 361, and secure it

with the mounting screw. See fig. 14.

Fig. 14 Refitting the back cover

TM04 2403 2508TM03 2227 3905

TM04 2586 2708TM04 2587 2708

Type:

Kit Funct. module - Geni/RS485Op

Prod. No.

Version V01 Serial No.

P. C. 0538

9854

CIM 250

GSM

CIM 250

96824795

7. Start-up

Start-up must be carried out by authorised

personnel.

8. Technical data

Transient voltages typically present on the mains

supply are category 2.

Altitude above sea level

Maximum 2000 m.

Ambient temperature

• During operation: –20 °C* to +60 °C

(must not be exposed to direct sunlight).

• In stock: –20 °C to +60 °C.

• During transportation: –20 °C to +60 °C.

* At temperatures below 0 °C, the display may react

slowly.

Relative air humidity

5 to 95 %.

Enclosure class

IP1X.

Pollution degree

External pollution degree 3.

9. Electrical data

9.1 Supply voltage

1 x 100-240 VAC ± 10 %, 50/60 Hz, PE.

9.2 Power consumption

Maximum 22 W.

9.3 Circuit breaker

Installation of circuit breakers must be done in

accordance with local and national regulations.

9.4 Digital inputs

9.5 Analog inputs

9.6 Digital outputs (relay outputs)

9.7 Conductors

Warning

Prior to start-up, read the installation

and operating instructions for the

product in question.

Open-circuit voltage 24 VDC

Closed-circuit current 5 mA, DC

Frequency range 0-4 Hz

Input current and voltage 0-20 mA

4-20 mA

0-10 V

Tolerance ± 3.3 % of full scale

Repetitive accuracy ± 1 % of full scale

Input resistance, current < 250 Ω

Input resistance, voltage > 50 kΩ± 10 %

Supply to sensor 24 V, 30 mA, short-

circuit-protected

Normally open contacts C, NO

Maximum contact load 240 VAC, 2 A

Minimum contact load 5 VDC, 10 mA

Rigid conductors 0.5-2.5 mm2

20-13 AWG (US)

Flexible conductors without

ferrule

Flexible conductors with

ferrule

With/without plastic collar

0.5-1.5 mm2

20-13 AWG (US)

9.8 Battery backup (UPS)

A battery can be connected to the CU 361 as backup

for the normal power supply. The battery can be

connected directly to the CU 361 without a fuse.

With the backup battery the CU 361 can continue to

operate despite interruptions in the normal power

supply.

Fig. 15 Label for backup battery

9.8.1 Battery data

The backup battery should meet the below

requirements:

9.8.2 Battery monitoring

The CU 361 can monitor the following:

• short-circuit

• wrong polarity

• defective battery

• battery missing

• low battery voltage.

9.9 Terminal groups

Fig. 16 Terminal groups

The terminals of the groups 2, 3, 5 and 6 are

insulated from all other terminal groups by reinforced

insulation, 2224 VAC.

All control terminals in groups 2, 3, 5 and 6 are

supplied with SELV voltage (Safety Extra-Low

Voltage).

TM04 2367 2408

Battery brand Power Sonic

Battery type Lead acid battery AGM type

Battery series PS 12xxx series UL R/C under

file number MH20845

Nominal voltage 12 V

Battery capacity 40 Ah, recommended

(24 hours operating time)

Nominal charging

time 8 hours (40 Ah battery)

12V dc

Battery powered

0V 12V

96801950

TM04 2067 1908

Group 1 Connection of power supply

Group 2 Internal GENIbus connection

Group 3 Fieldbus connection

(CIM module) (not standard)

Group 4 Connection of backup battery

supply

Group 5 Digital inputs

Group 6 Analog inputs

Group 7 Digital outputs

10. Overview of inputs and outputs

DI: Digital input

DO: Digital output

AI: Analog input

NC: Normally closed contact

NO: Normally open contact

C: Common.

Position numbers, see fig. 2.

Pos. Terminal Designation Data Diagram

LConnection to phase

conductor 1 x 100-240 VAC ± 10 %, 50/60 Hz

NConnection to neutral

conductor

PE Connection to

protective earth

A1 RS-485 A GENIbus

(Fix the screen with a cable clamp.)

Y1 RS-485 GND

B1 RS-485 B

Functional earth

3 Connection to external fieldbus, see installation and operating instructions for the CIM module.

40 V Connection to battery Backup battery

+12 VDC

10 DI1

Digital input

11 GND

12 DI2

13 GND

14 DI3

All terminals (except mains terminals) must only be connected to voltages

not exceeding 16 Vrms and 22.6 Vpeak or 35 VDC.

6Ethernet RJ45

External computing devices connected to the Ethernet connection must

comply with the standards IEC 60950 and UL 60950.

7 GENIbus Service connection

47 +24 V Supply to sensor. Short-circuit-

protected 30 mA

50 +24 V Supply to sensor. Short-circuit-

protected 30 mA

51 AI1 Input for analog signal,

0-20/4-20 mA or 0-10 V

53 +24 V Supply to sensor. Short-circuit-

protected 30 mA

54 AI2 Input for analog signal,

0-20/4-20 mA or 0-10 V

57 AI3

58 GND*

All terminals (except mains terminals) must only be connected to voltages

not exceeding 16 Vrms and 22.6 Vpeak or 35 VDC.

CU 361

CU 361 IO 351

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