ABB CMS-660 User manual

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CMS-660 User manual

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CIRCUIT MONITORING SYSTEM

CMS-660

User manual

• Current monitoring at solar plant's string level

• Immediate detection of unusual system status (e.g. solar shading,

over-voltages, breaker trip, high temperature)

• Simplified installation thanks to quick mounting of sensors

• Smart commissioning in only a few minutes

• Easy retrofitting and upgrade thanks to the flexible, modular design

CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)

004 Use and Storage of the Manual

005 General Information

006 Packaging Contents

007–010 Product Overview

011–013 Components of CMS system

014–017 Installation Guide

018 Wiring Diagrams

019 Initial Commissioning

020–026 Modbus

027–029 Modbus Mapping

030 FAQ

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Table of contents

CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)

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Storing

The manual must be stored close to the device; safe from liquids and anything else which may

compromise its leggibility. The manual and the declaration of conformity are both an integral part

of the device until it is dismantled. If the manual is lost or illegible please request a copy from the

manufacturer.

The copyright of this manual is the property of ABB Ltd. This manual contains texts, designs and

illustrations of a technical nature which must not be disclosed or transmitted to third parties, even

partially, without the written authorisation of ABB Ltd.

Liability disclaimer

The information contained in this document is subject to change without notice and cannot be

considered as an obligation by ABB Ltd. ABB Ltd. is not liable for any errors that may appear in this

document. ABB Ltd. is not liable under any circumstances for any direct, indirect, special, incidental

or consequential damage of any kind that may arise from using this document. ABB Ltd. is also not

liable for incidental or consequential damage that may arise from using the software or hardware

mentioned in this document.

Brand

ABB Ltd. is a registered trademark of ABB Group. All other brands or product names mentioned

in this document are trademarks or registered trademarks of their respective owners.

Meaning of symbols

Warning – can result in death or

serious personal injury

Non-safety related, but useful

and important information

CE conformity mark Torque

Observe the accompanying

documents

Disposal

Installation,

electrotechnical expertise

Equipment protected throughout

by reinforced insulation

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Use and Storage of the Manual

This manual contains all of the safety information, the technical

aspects and the operating necessary to ensure the correct use of

the device and maintain it in safe conditions.

CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)

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General Information

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Cleaning

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Safety warnings

Attention: Non-adherence to the following points can lead to serious injury or death.

Use the suitable personal protection devices and adhere to the current regulations governing

electrical safety.

This device must be installed exclusively by qualified personnel who have read all of the information

relative to the installation.

Check that the voltage on the main side is compatible with the range permitted by the device.

Ensure that all current and voltage supplies are disconnected prior to carrying out any controls,

visual inspections and tests on the device.

Always assume that all circuits are under voltage until they are completely disconnected, subjected to

tests and labelled.

Disconnect all of the power supply prior to work on the device.

Always use a suitable voltage detection device to check that the supply is interrupted.

Pay attention to any dangers and carefully check the work area ensuring that no instruments or

foreign objects have been left inside the compartment in which the device is housed.

The correct use of this device depends on a correct manipulation, installation and use.

Failure to adhere to the basic installation information can lead to injuries as well as damage to the

electric instruments or to any other product.

The tests carried out at a high voltage can damage the device's electronic components.

Disposal

Defective devices must be disposed of as special waste at the appropriate collection

points set up for this purpose. National or regional regulations on the disposal of special

waste must be followed.

Service and maintenance

The device undergoes several safety assessments before shipment and will be sealed.

If a device is opened, the safety assessments have to be repeated. A warranty will be provided

for unopened devices only.

Use a dry cloth. Ensure that the device and all related circuits are not under voltage prior to clean the

device.

CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)

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Packaging Contents

Attention: The following items are not

included in the delivery of the product

1) CMS-Sensors

2) Power supply

3) CMS-Bus

4) Connector set

- Control unit (CMS-660)

- Installation manual

CMS-660

Control Unit

Status

Network

Reset

USB

CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)

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Product Overview

Intended use

The system consists of a control unit and sensors.

The sensors measure alternating, direct and mixed currents (TRMS) up to 80 A and are connected to

the control unit by a flat cable, the CMS-Bus. Up to 32 sensors can be connected to each CMS-660

control unit.

The two-channel digital input allows the integration of SPD and Breaker status ensuring up-to date

information on the system. CMS-660 also allows to get the temperature value through open-core

sensors.

The measurement data can be analyzed via RS485 interface with Modbus RTU protocol.

A micro-USB port located on the front of the device is designed for configuration and operation.

The CMS-660 control unit is a measurement instrument for current

branch monitoring, up to 32 branch sensors.

CMS-Bus (32 sensors) Digital input

Micro-USB port

24 V DC Power supply

+

Serial RS485 port: Modbus RTU

CMS-660

Control Unit

Status

Network

Reset

USB

CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)

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Product Overview

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Reset button

On the front of the device, you can find a button that allows to restart and/or reset the device to

a defined condition. The reset button can be also used to restart the device, as well as initiating the

commissioning phase.

• Pressing the button for ~1 second (1 beep) restarts the device without any configuration change.

• Pressing the button for 3 to less than 6 seconds (2 beeps) restarts the device and removes all sensor

assignments.

• Pressing the button for 6 to less than 9 seconds (3 beeps) restarts the device, removes all sensor

assignments and resets all configurations, including Modbus ID (factory reset).

Do not switch off the power supply during the reset process.

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LEDs

Two LEDs on CMS-660 indicate respectively the status of the device and the status of the network.

1. LED Status

Off Device is off

Green on Normal operation

Green slow blink Starting procedure (~ 3 sec)

Green flash Digital input status has changed

Yellow blink Configuration mode, waiting for sensor registration

Red on No sensors registered, configuration mode not active

Red blink Error, reset is necessary

2. LED Network

Off No communication

Green flash Modbus or USB communication

CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)

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Product Overview

Technical specifications

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CMS-660

CMS-660 control unit

General data

Degree of protection IP20

Operating temperature [°C] 

Storage temperature [°C] 

Dimensions W / H / D [mm] 

Weight [g] 144

Altitude [m] 

Insulation strength [V AC] 400

Installation on DIN-rail 35 mm (DIN EN 50022)

Reference standards IEC 61010-1

UL 508 / CSA C22.2 No. 14

Supply

Screw-type terminals 0.5…2.5 mm², max 0.6 Nm

Supply voltage [V DC] 24 (±10%)

Power Input [W] 0.5 - 11 (dep. on n. of sensors)

Serial interface (RS-485)

Screw-type terminals 0.5…2.5 mm², max 0.6 Nm

Serial transmission speed [kbps] 2.4 … 115.2

Cable type Twisted pair, shielded

Communication protocol Modbus RTU

CMS-Bus

Max. number of sensors 32

Refresh time 

Digital inputs 2

Connection method Push-in spring connection

Cable diameter Max. 0.5 mm²

Electrical characteristics For potential-free contact ; don't apply external voltage

Timing Status change is detected after ~0.5 sec (debounce)

Digital input 1 Pin 1 and 2

Digital input 2 Pin 3 and 4

Value 1 = external contact closed

0 = external contact open

CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)

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Product Overview

Overall dimensions

71.8

50.5

21.5

43.5

17.7

36.2

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