ABB CMS-660 User manual

— 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)
3
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

4
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.
Copyright
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)
5
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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.

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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

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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

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CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)
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Product Overview
Overall dimensions
87
71.8
50.5
65
21.5
43.5
45
17.7
36.2
87