Phoenix Contact SCK-C-MODBUS, SCK-M-I-8S-20A, SCK-M-I-4S-20A, SCK-M-U-1500V User Manual

Solarcheck string monitoring

User manual

User manual

Solarcheck string monitoring

2013-06-14

Designation:

Revision:

This user manual is valid for:

Designation Order No.
SCK-C-MODBUS 2901674
SCK-M-I-8S-20A 2903241
SCK-M-I-4S-20A 2903242
SCK-M-U-1500V 2903591

UM EN Solarcheck String Monitoring

00

PHOENIX CONTACT 105608_en_00

Please observe the following notes

User group of this manual

The use of products described in this manual is oriented exclusively to:
– Qualified electricians or persons instructed by them, who are familiar with applicable

standards and other regulations regarding electrical engineering and, in particular, the
relevant safety concepts.

– Qualified application programmers and software engineers, who are familiar with the

safety concepts of automation technology and applicable standards.

Explanation of symbols used and signal words

This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety measures that follow this symbol to avoid possible in­jury or death.

There are three different categories of personal injury that are indicated with a
signal word.

DANGER This indicates a hazardous situation which, if not avoided, will re-

sult in death or serious injury.

WARNING This indicates a hazardous situation which, if not avoided, could

result in death or serious injury.

CAUTION This indicates a hazardous situation which, if not avoided, could

result in minor or moderate injury.

This symbol together with the signal word NOTE and the accompanying text
alert the reader to a situation which may cause damage or malfunction to the
device, hardware/software, or surrounding property.

This symbol and the accompanying text provide the reader with additional in­formation or refer to detailed sources of information.

How to contact us

Internet Up-to-date information on Phoenix Contact products and our Terms and Conditions can be

found on the Internet at:

phoenixcontact.com

Make sure you always use the latest documentation.
It can be downloaded at:

phoenixcontact.net/products

Subsidiaries If there are any problems that cannot be solved using the documentation, please contact

your Phoenix Contact subsidiary.
Subsidiary contact information is available at phoenixcontact.com.

Published by PHOENIX CONTACT GmbH & Co. KG

Flachsmarktstraße 8
32825 Blomberg
GERMANY

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layout of our manuals, please send your comments to:

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Please observe the following notes

General terms and conditions of use for technical documentation

Phoenix Contact reserves the right to alter, correct, and/or improve the technical documen­tation and the products described in the technical documentation at its own discretion and
without giving prior notice, insofar as this is reasonable for the user. The same applies to any
technical changes that serve the purpose of technical progress.

The receipt of technical documentation (in particular user documentation) does not consti­tute any further duty on the part of Phoenix Contact to furnish information on modifications
to products and/or technical documentation. You are responsible to verify the suitability and
intended use of the products in your specific application, in particular with regard to observ­ing the applicable standards and regulations. All information made available in the technical
data is supplied without any accompanying guarantee, whether expressly mentioned, im­plied or tacitly assumed.

In general, the provisions of the current standard Terms and Conditions of Phoenix Contact
apply exclusively, in particular as concerns any warranty liability.

This manual, including all illustrations contained herein, is copyright protected. Any
changes to the contents or the publication of extracts of this document is prohibited.

Phoenix Contact reserves the right to register its own intellectual property rights for the
product identifications of Phoenix Contact products that are used here. Registration of such
intellectual property rights by third parties is prohibited.

Other product identifications may be afforded legal protection, even where they may not be
indicated as such.

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Table of contents

1 Introduction ................................................................................................................................9

1.1 Product overview...................................................................................................9

1.2 Area of application................................................................................................. 9

1.3 General safety notes............................................................................................10

2 General notes on PV systems ..................................................................................................11

2.1 Typical structure of large PV systems and PV power stations .............................11

2.2 Data collection in large PV systems .................................................................... 15

3 Solarcheck string current measurement with SCK-M-I-… ........................................................17

3.1 Safety notes for the device .................................................................................. 17

3.2 Function .............................................................................................................. 17

3.2.1 Current measurement .......................................................................... 18

3.2.2 Digital input ......................................................................................... 20

3.2.3 Analog input .........................................................................................20

3.2.4 Internal temperature measurement ......................................................21

3.3 Data acquisition and transfer...............................................................................21

3.4 Power supply.......................................................................................................22

3.5 Technical data.....................................................................................................22

4 Solarcheck string voltage measurement with the SCK-M-U-1500V .........................................25

4.1 Function............................................................................................................... 25

4.1.1 Voltage measurement ..........................................................................25

4.1.2 Note on the parallel connection of multiple voltage measuring

devices in a system ..............................................................................27

4.2 Data acquisition and transfer...............................................................................28

4.2.1 Representation of voltage values at the analog output .........................28

4.2.2 Step response time .............................................................................29

4.3 Power supply.......................................................................................................29

4.4 Technical data.....................................................................................................30

5 SCK-C-MODBUS Solarcheck communication module ............................................................31

5.1 Function............................................................................................................... 31

5.2 Data acquisition and transfer...............................................................................31

5.2.1 SCK-internal communication cycle ......................................................33

5.2.2 RS-485 communication .......................................................................33

5.2.3 Register addresses .............................................................................. 35

5.3 Power supply.......................................................................................................37

5.4 Technical data.....................................................................................................38

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Solarcheck family

6 Installation ................................................................................................................................39

6.1 Connection description........................................................................................ 39

6.2 Measuring category and notes on insulation .......................................................43

6.3 Control cabinet ....................................................................................................43

6.4 Cabling ................................................................................................................44

6.4.1 Installation instructions .........................................................................44

6.4.2 Material requirements ..........................................................................48

6.4.3 Cable lengths and conductor cross sections .......................................48

6.5 Installing the SCK-C-MODBUS communication module......................................49

6.5.1 Addressing the SCK-C-MODBUS communication module .................. 49

6.5.2 Connecting the SCK-C-MODBUS communication module ..................52

6.6 Installing SCK-M-I-xx current measuring modules............................................... 54

6.7 Installing the SCK-M-U-1500V voltage measuring module .................................57

6.7.1 PE connection ......................................................................................58

6.7.2 Connecting the measuring module to the SCK-M-I-8S-20A

Solarcheck current measuring module .................................................59

6.7.3 Connecting the measuring module outside of the

Solarcheck device range ...................................................................... 60

6.7.4 Connecting voltage measurement .......................................................60

6.8 Power supply for the Solarcheck devices ...........................................................61

6.8.1 Design of the power supply .................................................................. 61

6.8.2 Design of a separate power supply for the SCK-M-U-1500V

voltage measuring module ...................................................................63

7 Startup .....................................................................................................................................65

8 Additional functions ..................................................................................................................67

8.1 Energy-saving mode............................................................................................67

8.2 Locate function....................................................................................................68

8.3 System calibration ...............................................................................................69

9 Installation examples ...............................................................................................................71

9.1 Example 1 ...........................................................................................................71

9.2 Example 2 ...........................................................................................................72

9.3 Example 3 ...........................................................................................................73

9.4 Example 4 ...........................................................................................................74

10 Troubleshooting .......................................................................................................................75

10.1 Diagnostics and error removal.............................................................................76

10.2 Additional notes...................................................................................................82

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Table of contents

A Appendix ..................................................................................................................................85

A 1 Register tables ....................................................................................................85

A 2 Accessories.......................................................................................................110

A Appendix for document lists....................................................................................................111

A 1 List of figures .....................................................................................................111

A 2 List of tables ...................................................................................................... 115

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Solarcheck family

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1Introduction

ILC 150 ETH
Order-No.: 2985330
HW/FW: 00/100

MAC Addr.: 00.A0.48.04.09.C0

AUTOMATIONWORX

MRESET

RESET

RUN/PROG

PRG

STOP

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

LINK

Compact controller

Communication module

(for up to 8 measuring modules)

Measuring module for
current (8 strings)

Measuring module for
current (8 strings)

Measurement and
control technology

Data cable

Modbus

PV field

Measuring module for
current (4 strings)

Solar cablesData cables

Measuring module

for voltage

1.1 Product overview

Solarcheck is a modular monitoring system for photovoltaic systems. It consists of a com­munication module (SCK-C-MODBUS, Order No. 2901674) and various measuring mod­ules for current and voltage measurement.

The communication module collects the data from all connected measuring modules and
forwards it to a higher-level controller via Modbus RTU using an RS-485 connection.

At the same time, the connected measuring modules are supplied with power via the com­munication cable (SCK BUS) between the measuring modules and the communication
module.

Introduction

Figure 1-1 Solarcheck topology

1.2 Area of application

The Solarcheck device range is designed for use in medium to large PV systems and PV
power stations. Currents up to 20 A, reverse currents, and voltages up to 1500 V can be ac­quired. Even at the lowest level of utilization (one communication device with maximum as­signment of measuring device connections), it is possible to monitor 64 strings of a PV sys­tem.

With an average string power of approximately 4 kW, it is therefore possible to monitor a
segment of approximately 250 kW with just this basic design.

Typically the communication devices in a PV system are positioned centrally in a control
room. The measuring modules are located in string combiner boxes in the field. The internal
communication protocol enables the connected measuring modules to be supplied with
power via the communication cable. As a result, an additional power supply is not required

105608_en_00 PHOENIX CONTACT 9

for the measuring devices in the field.

Solarcheck family

1.3 General safety notes

• Installation, operation, and maintenance may only be carried out by qualified electri-

cians. Follow the installation instructions as described. When installing and operating
the device, the applicable regulations and safety directives (including national safety di­rectives), as well as generally approved technical regulations, must be observed. The
safety data is provided in this user manual and on the certificates (conformity assess­ment, additional approvals where applicable).

• The devices are only to be used as described here. Phoenix Contact accepts no liability
if the devices are used for anything other than their designated use. Any use other than
the designated use may lead to malfunction or irreversible damage of the devices.

NOTE: Electrostatic discharge

The devices contain components that can be damaged or destroyed by electrostatic dis­charge. When handling the device, observe the necessary safety precautions against
electrostatic discharge (ESD) according to EN 61340-5-1 and EN 61340-5-1.

NOTE: Degree of protection

The IP20 protection (IEC 60529/EN 60529) of the devices is intended for use in a clean
and dry environment. Install the module in housing with at least IP54 protection according
to EN 60529. The stated limits concerning mechanical or thermal loads on the modules
must not be exceeded.

WARNING: Risk of electric shock

Do not install voltage measurement while the system is in operation. High voltages may
be present in parts of the system even in diffuse daylight. Observe all statutory require­ments for live working.

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2 General notes on PV systems

+

–

L

N

~

=

~

+

–

=

~

LN

=

~

=

~

+

+

–

–

2.1 Typical structure of large PV systems and PV

power stations

PV generator with central inverter

General notes on PV systems

Figure 2-1 PV generator with central inverter

Generator with string inverters

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Figure 2-2 Generator with string inverters

Inverters with and without an internal transformer are used in PV systems. This results in
various electrical characteristics which must be considered with regard to the design of the
system, cabling, the use of other devices, and the grounding concept.

Inverters with transformers, for example, can be arranged without grounding as well as with
grounding on the negative or positive side.

Solarcheck family

-800

-600

-400

-200

0

200

400

600

800

1000

12a2b2c

V

PV

V

DC

Filter Filter

H-Bridge

50 Hz

+

–

V

AC

I

AC

As illustrated in the example below, this results in the following possible voltage levels in the
system:

Figure 2-3 Voltage ratio with and without transformer

1: Transformerless inverter
2a: Inverter with transformer, without grounding
2b: Inverter with transformer, with grounding at negative pole
2c: Inverter with transformer, with grounding at positive pole

The diagram also clearly shows that using transformerless inverters can mean that the total
PV generator potential oscillates to ground, even though the generator voltage itself sup­plies a DC voltage.

In the case of transformerless inverters, it should also be noted that there is no electrical iso­lation to ground here. This is particularly important if devices are incorporated in the system
which are only intended for IT systems, i.e., they have no ground connection.

Example diagram of generator with transformer inverter

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Figure 2-4 Example diagram of generator with transformer inverter

General notes on PV systems

+

–

L

N

~

=

~

+

–

L

N

~

=

~

Example diagram of generator with transformer inverter and grounding on the pos­itive side

Figure 2-5 Example diagram of generator with transformer inverter and grounding on

the positive side

Example diagram of generator with transformer inverter and grounding on the neg­ative side

Figure 2-6 Example diagram of generator with transformer inverter and grounding on

the negative side

105608_en_00 PHOENIX CONTACT 13

Solarcheck family

V

DC

Filter Filter

H-Bridge

I

AC

V

PV-PE

Example diagram of generator with transformerless inverter

Figure 2-7 Example diagram of generator with transformerless inverter

The individual strings of a PV generator, particularly in large systems with central inverters,
are connected in so-called string combiner boxes. In these string combiner boxes, multiple
PV strings are connected together in parallel and appropriate protective devices and moni­toring devices are provided.

When creating your PV system, observe the necessary standards for planning and installing
PV systems, such as IEC 60364-7-712, together with corresponding references and equiv­alent standards.

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General notes on PV systems

Weather Station

Data Storage

Remote Visu

Inverter Station

Local Visu

Internet

PV Plant

Main cabinet Infrastructure

StringBox

Signal conditioning

(PLC Function)

Energy
Data

StringBox

2.2 Data collection in large PV systems

Figure 2-8 Data collection in large PV systems

Data collection in large, extensive PV systems presents a challenge with regard to the net­work technology. On the one hand, the reliable assignment of data and data security must
be implemented well; on the other hand, the hardware design needs to be inexpensive and
straightforward. This is particularly relevant in the special electrical environment of a PV
power station.

Although the PV generator generates a direct current in principle, the inverters in the system
likewise have an impact on the power cables. This means that in a PV system, the inverter's
method of operation generates AC voltage components on the DC side. This may lead to
inductive interference of cables and devices in the proximity of the generator's DC cabling.
Depending on the inverter type and connection, the effect of these AC voltage components
can vary.

In order to avoid any influence on signals and data cables, corresponding standards regard­ing the install ati on of da ta cabl es in th e vicin ity of p ower cables mus t be ob ser ved. St andard
DIN EN 50174 provides comprehensive guidelines on planning and installing communica­tion cables in the vicinity of power cables.

105608_en_00 PHOENIX CONTACT 15

Solarcheck family

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Solarcheck string current measurement with SCK-M-I-…

Module

8-channel current

measurement up to 20 A

4-channel current

measurement up to 20 A

Reverse current detection

Analog input for voltage

measuring devices

Digital input

Internal temperature

measurement

Power supply via

SCK-C-MODBUS

Block diagram

SCK­BUS
OUT

U-IN

Digital

IN

1

+

–

2
3
4
5
6
7
8

I-IN

μ

C

COM

8x

0...10V

1
2
3
4

I-IN

m

C

SCK­BUS
OUT

COM

4x

Digital

IN

3 Solarcheck string current measurement with SCK-M-I-…

Various device versions are available for string current measurement. The device designa­tion indicates the number of current measuring channels and their measuring range final
value. Hall sensors are used for contact-free current measurement. The devices also have
a digital input, internal temperature indication, and some have an analog interface for con­necting a Solarcheck voltage measuring device.

3.1 Safety notes for the device

• Do not open or modify the device. Do not repair the device yourself; replace it with an

equivalent device. Repairs may only be performed by the manufacturer. The manufac­turer is not liable for damage resulting from noncompliance.

• The termination area must be covered after installation to ensure sufficient protection
against accidental contact with live parts (e.g., installation in a distributor box or control
cabinet).

3.2 Function

Table 3-1 Function matrix for current measuring modules

105608_en_00 PHOENIX CONTACT 17

SCK-M-

x-xxxxx

I-8S-20A

SCK-M-

-xx-xxx

I-4S-20A

Solarcheck family

P_OUT

SCK-M-I-8S-20A

Order No. 2903241

P

SCK BUS

D_IN

TX

0...10V

U

O
U

T

U

I
N

0...10V

G

N
D2

GN

D
1

STRING

CURRENT

SCK-M-I-4S-20A

Order No. 2903242

P

SCK BUS

D_IN

TX

STRING

C

URRENT

78

5

2

3

6

1

4

2

4

1

3

3.2.1 Current measurement

Hall sensors are used for contact-free current measurement. For measurement purposes,
the PV string cables are led through the holes in the module in the specified direction. Each
channel is equipped with a separate sensor. This means that all connected strings can be
measured independently of one another.

Figure 3-1 Channels for current measurement/feed-through direction

The channel assignment is printed on the side of the housing.

Figure 3-2 Assignment of the current measuring channels

Hall sensor measuring technology

The cable feed-throughs in the device are surrounded by magnetic cores which absorb and
concentrate the magnetic field of the live conductor. A Hall sensor positioned in an air gap
in the magnetic core generates a voltage signal proportional to the strength of the magnetic
field. This voltage signal can then be used directly to determine the current strength. Since
the current direction also determines the direction of the magnetic field, this measuring tech­nology can also be used to indicate the current direction. As a result, reverse current detec­tion is integrated in the Solarcheck current measuring devices.

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Solarcheck string current measurement with SCK-M-I-…

I

String‘

I

String

0 A-1,5 A -1 A 1 A 25 A

20 A

100 A

25 A
20 A

-1 A

-1,5 A

Value ranges

Reverse currents of up to -1 A can be measured. Positive and negative current values are
stored in a signed register. The values can be interpreted and a corresponding alarm func­tion can be activated via a higher-level controller.

Values outside the measuring range from -1 A to +20 A are not accurate enough. Values
outside the overcurrent range from -1.5 A to +25 A are removed from the register.

Figure 3-3 Valid value range for current measurement

Measuring accuracy

Current measurement has an accuracy of ±1%. This value is based on the measuring range
final value (20 A) and is valid for the entire measuring range from -1 A to +20 A. Further­more, a temperature coefficient TC

is applied to the measurement. This is ±0.02%/Kelvin.

20

The deviation occurs above and below the production-related compensation temperature
of 20°C.

Example:

Ambient temperature: 30°C

Deviation of measurement ±1% + (±0.02% x (T

Deviation at T

= ±1.2% of measuring range final value (±1.2% of 20 A = ±240 mA)

30°C

Ambient

– T

Compensation

))

105608_en_00 PHOENIX CONTACT 19

Solarcheck family

SCK-M-I-8S-20A

Order No. 2903241

P

SCK BUS

D_IN

TX

1214 11

FM

VAL-MS...

L– /

L+

3.2.2 Digital input

NOTE: Risk of material damage due to incorrect wiring

The digital signal input may not be wired to an active signal.

Wire floating contacts of, e.g., door contacts or remote indication contacts of surge protec­tion elements directly to digital input D_IN.

The state of the switch contact is set as a bit in the communication module and can be read
by a controller.

Figure 3-4 Digital input

The refresh time for this status monitoring depends on the SCK-internal communication
loop. For additional information, please refer to “SCK-internal communication cycle” on
page 33.

3.2.3 Analog input

The analog input is designed for analog 0 … 10 V standard signals. Incoming 0 … 10 V sig­nals are stored as a 16-digit INT value.

Using the analog connection for devices in the Solarcheck device range

The 2 … 10 V analog output of the voltage measuring module can be connected to the an­alog 0 ... 10 V input of the 8-channel current measuring module. Use of this function is op­tional. Due to the live zero point of the output, cable break detection is integrated automati­cally (“live zero”). Output P_OUT is designed specifically for connection of the SCK-M-U­1500V voltage measuring module (Order No. 2903591). The maximum distance between
current and voltage measuring modules is 0.5 m.

The value range is defined as -2000 … 12000 (for -2 ... 12 V). For further details on voltage
measurement, refer to Section 5.2.

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Solarcheck string current measurement with SCK-M-I-…

Using the analog connection for analog devices that are not part of the Solarcheck
device range

The data cable of any analog module with 0 ... 10 V, 0 … 5 V or 2 … 10 V standard signals
can be connected to the 0 ... 10 V input of the measuring module. Please note that
0 … 10 V and 0 … 5 V signals do not support the live zero function.

The supply output of the SCK-M-I-8S-20A is specifically tailored to the performance char­acteristics of the SCK-M-U-1500V. Power supply to other devices is therefore not supported
or only supported to a limited extent and usually has to be implemented separately. When
designing this separate power supply, observe the relevant requirements from the data
sheet of the module to be connected.

Also observe the input resistance of the analog input (200 kΩ) if you want to connect analog
devices that are not part of the Solarcheck device range.

Make sure that the connected analog device is electrically isolated from the supply of the
remaining Solarcheck devices. Otherwise invalid values may occur on the analog input
side.

3.2.4 Internal temperature measurement

The internal device controller is equipped for temperature measurement. This means that
the device temperature inside the module can be monitored. The device is designed for op­eration under temperature conditions ranging from -20°C .… +70°C. From experience, de­pending on the ambient conditions (ventilation situation, etc.) the temperatures inside the
device are approximately 10°C above the temperature outside the device.

To that effect normal device operation is ensured if the temperatures measured inside indi­cate ≤ 80°C. If the temperature inside the device exceeds 80°C, this may affect the function,
electronics, and service life of the device.

3.3 Data acquisition and transfer

The acquired data is transferred to the SCK-C-MODBUS Solarcheck communication mod­ule via an internal communication cycle. A proprietary protocol is used for transmission. This
protocol also ensures that power is supplied to the measuring module. For this reason, it is
only possible to operate the current measuring modules via the corresponding SCK-C­MODBUS Solarcheck communication module (Order No. 2901674). The Solarcheck cur­rent measuring modules cannot be connected directly to a higher-level control unit.

The internal communication cycle ensures that the measuring data in the communication
module is updated very quickly within 2 s. The data is acquired and then transferred at the
request of the communication module. It is then available in the communication module for
a higher-level controller via Modbus. For further details on data retrieval, refer to Section

5.2.1 on page 33 and 5.2.2 on page 33.

105608_en_00 PHOENIX CONTACT 21

Solarcheck family

3.4 Power supply

The Solarcheck current measuring modules are supplied via the communication interface
to the Solarcheck communication module (SCK BUS). The transmission protocol includes
a corresponding power transmission function which ensures the permanent operation of the
connected measuring modules. Observe the installation instructions in Section 6.6 on
page 54 and the notes on designing the power supply of the overall Solarcheck system in
Section 6.8 on page 61.

3.5 Technical data

Current measurement SCK-M-I-8S-20A

(2903241)

Supply

Supply voltage Via SCK-C-MODBUS

Typical internal power consumption 43 mA

Maximum internal power consumption 50 mA

Measuring inputs

Current measuring range 0 … 20 A DC

Maximum transmission error from measuring
range final value

Temperature coefficient TC

Reverse current detection -1 … 0 A DC

Number of measuring channels 8 4

Overload capacity 5 x I

Connection method 9.5 mm through connection

20

Digital input

Controlled by external floating contact Yes

Cable length ≤ 30 m

Analog input

Input voltage range 0 … 10 V -

Analog output

Output voltage range 24 V supply for 2903591 -

Cable length (for 0.15 mm²) 0.5 m, maximum -

Cable type Twisted, shielded -

Data interface for SCK-C-MODBUS

Cable length (for 0.15 mm²) ≤ 300 m

Cable length (for 1.5 mm²) ≤ 500 m

Cable type Twisted, shielded

Communication protocol Proprietary

SCK-M-I-4S-20A (2903242)

±1%

0.02% / K

N

22

PHOENIX CONTACT 105608_en_00

Solarcheck string current measurement with SCK-M-I-…

Current measurement SCK-M-I-8S-20A

(2903241)

General data

Degree of protection IP20

Ambient temperature range (operation) -20°C ... 70°C

Ambient temperature range (storage) -40°C ... 85°C

Dimensions W / H / D 22.5 / 102 / 128.5 mm

Screw connection solid / stranded / AWG 0.2 ... 2.5 mm² / 0.2 ... 2.5 mm² / 24 - 12

Tightening torque 0.5 - 0.6 Nm

Humidity at 25°C, no condensation ≤ 95%

Altitude ≤ 2000 m

Installation on DIN rail 35 mm (DIN EN 50022)

Pollution degree 2 2

Conformance/approvals

Conformance CE-compliant

Referenced standard EN 61010-01:2011-7

Conformance with EMC Directive 2004/108/EC and Low Volt-

age Directive 2006/95/EC

SCK-M-I-4S-20A
(2903242)

105608_en_00 PHOENIX CONTACT 23

Solarcheck family

24

PHOENIX CONTACT 105608_en_00

Solarcheck string voltage measurement with the SCK-M-U-1500V

U

1

U

2

U_OUT

P_IN

0 V

24 V

0...1500 V DC

R

X

R

X

4 Solarcheck string voltage measurement with the

SCK-M-U-1500V

4.1 Function

The Solarcheck voltage measuring module is used to measure PV voltages up to
1500 V DC. Voltage measurement can be performed in isolated systems as well as systems
grounded on the positive or negative side.

The analog output of the device maps the measured system voltage as a 2 ... 10 V signal.
The module is usually connected to the corresponding 8-channel current measuring module
(SCK-M-I-8S-20A, Order No. 2903241).

As an option, the voltage measuring module can also be operated as a simple analog mea­suring device outside of the Solarcheck device range.

Observe the installation instructions in “Installing the SCK-M-U-1500V voltage measuring
module” on page 57.

4.1.1 Voltage measurement

The voltage is measured via two impedance chains, one of which measures the voltage of
+ to PE and the other the voltage of - to PE. Both measured values are first determined in­dividually and are then added. This gives the system voltage value. This value is then output
as a 2 … 10 V analog signal via the analog output.

Figure 4-1 Block diagram (Rx = 20 MΩ)

Marginal conditions for valid voltage values:

1. U+ ≥ PE ≥ U-

2. 0 < U+ < 1500 V

3. 0 < U- < -1500 V

4. (U+) - (U-) ≤ 1500 V

The difference between U+ and U- must not exceed 1500 V. Negative differential mode volt­ages are not permitted.

It is imperative that the PE contact is connected, as in addition to its safety-related function
it is also used as the reference potential for measurement.

105608_en_00 PHOENIX CONTACT 25

Solarcheck family

Different potential levels may occur depending on the structure and connection of the PV
system. The following voltage ranges can be acquired by the device and represented as an
analog value.

Table 4-1 Valid voltage ranges - part 1

U+

U- 0 -100 -200 -300 -400 -500 -600 -700

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

2.00 V 2.53 V 3.07 V 3.60 V 4.13 V 4.67 V 5.20 V 5.73 V

2.53 V 3.07 V 3.60 V 4.13 V 4.67 V 5.20 V 5.73 V 6.27 V

3.07 V 3.60 V 4.13 V 4.67 V 5.20 V 5.73 V 6.27 V 6.80 V

3.60 V 4.13 V 4.67 V 5.20 V 5.73 V 6.27 V 6.80 V 7.33 V

4.13 V 4.67 V 5.20 V 5.73 V 6.27 V 6.80 V 7.33 V 7.87 V

4.67 V 5.20 V 5.73 V 6.27 V 6.80 V 7.33 V 7.87 V 8.40 V

5.20 V 5.73 V 6.27 V 6.80 V 7.33 V 7.87 V 8.40 V 8.93 V

5.73 V 6.27 V 6.80 V 7.33 V 7.87 V 8.40 V 8.93 V 9.47 V

6.27 V 6.80 V 7.33 V 7.87 V 8.40 V 8.93 V 9.47 V 10.00 V

6.80 V 7.33 V 7.87 V 8.40 V 8.93 V 9.47 V 10.00 V

7.33 V 7.87 V 8.40 V 8.93 V 9.47 V 10.00 V

7.87 V 8.40 V 8.93 V 9.47 V 10.00 V

8.40 V 8.93 V 9.47 V 10.00 V

8.93 V 9.47 V 10.00 V

9.47 V 10.00 V

10.00 V

Table 4-2 Valid voltage ranges - part 2

U+

U- -800 -900 -1000 -1100 -1200 -1300 -1400 -1500

6.27 V 6.80 V 7.33 V 7.87 V 8.40 V 8.93 V 9.47 V 10.00 V

0

6.80 V 7.33 V 7.87 V 8.40 V 8.93 V 9.47 V 10.00 V

100

7.33 V 7.87 V 8.40 V 8.93 V 9.47 V 10.00 V

200

7.87 V 8.40 V 8.93 V 9.47 V 10.00 V

300

8.40 V 8.93 V 9.47 V 10.00 V

400

8.93 V 9.47 V 10.00 V

500

9.47 V 10.00 V

600

10.00 V

700

The inner range represents the respective analog value that is issued by the device under
the respective voltage conditions.

26

PHOENIX CONTACT 105608_en_00

Solarcheck string voltage measurement with the SCK-M-U-1500V

Calculation basis for Table4-1 and Table4-2:

If

(0 < U+ < 1500 V) and
(0 < U- < -1500 V) and

(0 < Difference (U+, U-) < 1500 V

Then

Analog Out:

Difference (U+, U-) x 8 V

1500 V

The maximum measured value deviation of 1% (of the measuring range final value) is based
on the 100….1500VDC system voltage range. The deviation may be greater below
100 V DC.

+ 2 V

4.1.2 Note on the parallel connection of multiple voltage

measuring devices in a system

Due to the circuit architecture in the device, the voltage measuring input is connected to
ground via the internal impedances. Resistance Rx is 20 MΩ respectively. If multiple volt­age measuring devices are connected to the same generator in parallel, these impedances
are also connected in parallel. This results in overall reduced impedance of the generator to
ground. This can affect the response of any ground fault detection in the system.

The impedances of the voltage measuring devices used within a generator (per inverter in­put) therefore have to be taken into consideration when defining the threshold values for
ground fault detection.

The following impedances result depending on the number of voltage measurements con­nected in parallel in a system.

Table 4-3 Impedances

Number of parallel
voltage measurements

120 MΩ 20 MΩ
220 MΩ 10 MΩ
420 MΩ 5 MΩ
820 MΩ 2.5 MΩ
16 20 MΩ 1.25 MΩ
32 20 MΩ 0.625 MΩ
64 20 MΩ 0.313 MΩ
128 20 MΩ 0.156 MΩ

105608_en_00 PHOENIX CONTACT 27

Individual impedance
(+  PE)

…

Total impedance
(+  PE)

Solarcheck family

U

2...10V OUT

=

()

2 V - 10 V

x U + 2 V

+ - (HVin)

0 - 1500 V

U

+ - (HVin)

=

()

2

x U - 375 V

2...10V OUT

375

6000

7000

8000

9000

10000

0 V

2 V

3 V

4 V

5 V

6 V

7 V

8 V

9 V

10 V

5000

4000

3000

2000

100 V

200 V

300 V

400 V

500 V

600 V

700 V

800 V

900 V

1000 V

1100 V

1200 V

1300 V

1400 V

1500 V

Y

1

Y

2

X

4.2 Data acquisition and transfer

The analog output of the voltage measuring module can be connected directly to the
0 … 10 V input of the corresponding SCK-M-I-8S-20A Solarcheck current measuring mod­ule. The measured values are then available via the SCK-C-MODBUS Solarcheck commu­nication module via RS-485 Modbus RTU.

As an option, the output can also be connected to any analog 0 … 10 V input of a controller,
for example.

Observe the installation instructions in “Installing the SCK-M-U-1500V voltage measuring
module” on page 57 for integration and installation of the voltage measuring module.

The voltage value is mapped as a 2 … 10 V signal. Due to the live zero point of the output,
cable break detection is integrated automatically (“live zero”).

4.2.1 Representation of voltage values at the analog output

The following calculation is used as the basis for mapping the system voltage values:

Table 4-4 System voltage calculation

Transfer function Resulting system voltage

This results in the following value representation:

Figure 4-2 Value representation for voltage measurement

Y1 (left): decimal register value

Y2 (right): analog value (U_OUT)

X: system voltage

28

PHOENIX CONTACT 105608_en_00

Example:

800 V

1000 V

1200 V

1400 V

1600 V

2 V

3 V

4 V

5 V

6 V

7 V

8 V

9 V

10 V

600 V

400 V

200 V

0 V

U_

IN

U_

OUT

(Delta) t

-200 V

1 V

0 ms 50 ms 100 ms 150 ms 200 ms 250 ms 300 ms 350 ms 400 ms 450 ms 500 ms

15 ms

29 ms

56 ms

287 ms

U_

IN

U_

OUT

t

Solarcheck string voltage measurement with the SCK-M-U-1500V

Nominal voltage

1500 V

PV

Lower value

0VPV =
2V

ANALOG

Upper value

1500 VPV =
10 V

ANALOG

4.2.2 Step response time

Resolution Example oper-

ating voltage

1VPV =

0.0053 V

ANALOG

850 VPV =

6.53 V

ANALOG

Register rep­resentation

6530 [dec]

Figure 4-3 Step response time

If the module is connected to the SCK-M-I-8S-20A Solarcheck current measuring module,
the measured values are available via the SCK-C-MODBUS Solarcheck communication
module. In this case, the shortest possible retrieval interval depends on the refresh cycle of
the Solarcheck devices. The fastest possible cycle time between SCK-C-MODBUS and
SCK-M-I-8S-20A is 2 s. For further details on the internal communication cycle, refer to Sec­tion 5.2.1 on page 33.

4.3 Power supply

The voltage measuring module is usually supplied directly via the supply output of the SCK­M-I-8S-20A Solarcheck current measuring module. Design the power supply for the entire
Solarcheck device chain as described in “Power supply for the Solarcheck devices” on

105608_en_00 PHOENIX CONTACT 29

page 61. If the voltage measuring module is connected to the SCK-M-I-8S-20A Solarcheck
module, an additional power supply is not required for the device.

Alternatively, the voltage measuring device can also be used outside of the Solarcheck de­vice range. In this case, the power supply must be implemented separately and connected
directly to the supply input. To do this, proceed as described in “Installing the SCK-M-U­1500V voltage measuring module” on page 57.

Solarcheck family

4.4 Technical data

Voltage measurement SCK-M-U-1500V (Order No. 2903591)

Supply

Supply voltage 24 V DC (-10% … +25%) or via SCK-M-I-8S-20A

Typical internal power consumption 8 mA

Maximum internal power consumption 65 mA

Measuring inputs

Voltage measuring range 0 ... 1500 V DC

Maximum transmission error from measuring range final
value

Temperature coefficient from T > 25°C 0.01% / K

Number of measuring channels 1

Connection method Screw connection

Minimum terminal block distance 32 mm

Surge voltage 6 kV

Analog output

Output voltage range 2 … 10 V

Cable length (for 0.15 mm²) 0.5 m, maximum

Cable type Twisted, shielded

General data

Degree of protection IP20

Ambient temperature range (operation) -20°C ... 70°C

Ambient temperature range (storage) -40°C ... 85°C

Dimensions W / H / D 22.5 / 102 / 128.5 mm

Screw connection solid / stranded / AWG 0.2 ... 2.5 mm² / 0.2 ... 2.5 mm² / 24- 12

Tightening torque 0.5 - 0.6 Nm

Humidity at 25°C, no condensation ≤ 95%

Altitude ≤ 2000 m

Installation on DIN rail 35 mm (DIN EN 50022)

Pollution degree 2

Conformance/approvals

Conformance CE-compliant

Referenced standard EN 61010-01:2011-7

1% after additional adjustment
(valid for 100 … 1500 V DC)

Conformance with EMC Directive 2004/108/EC and Low
Voltage Directive 2006/95/EC

30

PHOENIX CONTACT 105608_en_00

SCK-C-MODBUS Solarcheck communication module

A

+24 V

B

GND1

GND2

GND2

GND1

+24 V

DC

DC

RS-485



C

INPUT

SCK-MODBUS

T1

T2

T3

T4

T5

T6

T7

T8

5 SCK-C-MODBUS Solarcheck communication module

5.1 Function

The communication module collects the data from all connected measuring modules and
forwards it to a higher-level controller via RS-485 Modbus RTU.

At the same time, the connected measuring modules are supplied with power via the com­munication cable (SCK BUS) between the measuring modules and the communication
module.

This distributed structure means that a power supply is not required in the string combiner
box in the field.

Figure 5-1 Block diagram of the SCK-C-MODBUS Solarcheck communication module

5.2 Data acquisition and transfer

The Solarcheck communication module acquires the data from all Solarcheck measuring
modules connected in parallel. Each measuring module is connected to a separate data
input (T1…T8). This therefore creates a star wiring configuration. A maximum of eight mea­suring modules can be connected to a communication module. A proprietary protocol is
used for data transfer between the measuring modules and the communication module. At
the same time, the communication cable is also used to supply power to the measuring
modules in the field. The data is made available to the higher-level control unit via an RS­485 interface using Modbus RTU.

105608_en_00 PHOENIX CONTACT 31

Solarcheck family

ILC 150 ETH
Order-No.: 2985330
HW/FW: 00/100

MAC Addr.: 00.A0.48.04.09.C0

AUTOMATIONWORX

MRESET

RESET

RUN/PROG

PRG

STOP

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

LINK

Compact controller

Communication module

(for up to 8 measuring modules)

Measuring module for
current (8 strings)

Measuring module for
current (8 strings)

Measurement and
control technology

Data cable

Modbus

PV field

Measuring module for
current (4 strings)

Solar cablesData cables

Measuring module

for voltage

1. Request signal to
SOLARCHECK

measuring devices

Data

Energy

Data

Compact controller

ILC 150 ETH
Order-No.: 2985330
HW/FW: 00/100

MAC Addr.: 00.A0.48.04.09.C0

AUTOMATIONWORX

MRESET

RESET

RUN/PROG

PRG

STOP

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

LINK

3. Storage of measuring
data in registers

2. Response from
SOLARCHECK

measuring devices

(measuring data)

Response of SOLARCHECK

communication device

Request signal

to SOLARCHECK

communication device

It is imperative that the data from the measuring modules is retrieved via the communication
module. Operation without a communication module is only supported for the SCK-M-U­1500V.

Figure 5-2 Structure of the Solarcheck communication network

32

PHOENIX CONTACT 105608_en_00

Figure 5-3 Schematic diagram of Solarcheck communication

SCK-C-MODBUS Solarcheck communication module

5.2.1 SCK-internal communication cycle

In the SCK-internal communication cycle, all connected measuring modules are queried in
parallel after a fixed defined request signal. The transmitted measured values are saved in
the corresponding registers. This request cycle permanently runs automatically. The baud
rate is fixed at 1200 baud. Depending on the amount of data transmitted, the cycle time is
around 1 - 2 s on average.

New measured values are therefore only available in the registers of the communication
module for the higher-level controller once a cycle has been run (refer to Figure 5-3 on
page 32).

In the event of a data transmission error between the measuring and communication mod­ules, the data is requested again up to three times. If no valid data is available after the third
request, the device indicates an internal error.

If the module does not receive a response after 10 s, it enters “Timeout” status.

For further details on error messages, refer to “Troubleshooting” on page 75.

5.2.2 RS-485 communication

The register entries (measured data) are transmitted to the higher-level controller via the
RS-485 interface using Modbus RTU.

A unique address is set on the communication module for module and data assignment.
The DIP switches inside the device are used for this. The procedure for setting the module
address is described in “Installing the SCK-C-MODBUS communication module” on
page 49.

Table 5-1 Modbus settings

Protocol Modbus RTU
Valid addresses 1...247

Default setting: 0 (invalid address, must be changed)
Baud rate Default setting: 9600 bps
Parity Default setting: none
Stop bits Default setting: 1
Code 8-bit binary
Function code Function for reading the SCK-MODBUS measured values. All mea-

sured values are stored in a 16-bit word.

The module address is set to “0” by default and must be changed. Communication is not
possible when the address is set to “0”. For additional information on setting the module ad­dress, please refer to “Addressing the SCK-C-MODBUS communication module” on
page 49.

Assign appropriate addresses in the 1 ... 247 address area according to your system con­figuration. By default, the address area from 248 ... 255 is assigned to non-stationary de­vices and cannot be used.

105608_en_00 PHOENIX CONTACT 33

Solarcheck family

You must design the Modbus data request for the communication module according to the
following schematic:

Client

address

Function

code

Start

register

Total number of

registers

CRC

(Cyclic Redundancy

Check)

03 03 04B1 0015 D4F0

Client No. 3Read holding

register

1201 21 Resulting

checksum

Response: 03 03 xx xx xx xx xx ... (address + function code + data + CRC)

Example data record:

Request for module information data from module No. 3:

Tx: 03 03 04 B1 00 15 D4 F0

Response from module:

Rx: 03 03 2A 00 01 01 23 45 67 89 AB CD EF 43 53 2D 4B 2D 43 4F 4D 42 44 53 55 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 97 3A

Response in plain text:

03  Addressed module ID

03  Function code

2A  Number of subsequent bytes (here: 42 bytes, 21 registers)

00 01  Module ID (SCK-C-MODBUS module type)

01 23 45 67 89 AB CD EF  4 registers, module serial number

43 53 2D 4B 2D 43 4F 4D 42 44 53 55 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00  Module designation in ASCII code: “SCK-C-MODBUS” (occupies a maximum
of 32 characters)

97 3A  Checksum

34

PHOENIX CONTACT 105608_en_00

SCK-C-MODBUS Solarcheck communication module

5.2.3 Register addresses

5.2.3.1 Structure of the register areas

Table 5-2 Structure of the register areas

Modbus address
HEX [DEC]

0000..005D
[0..93]

0080..00B0
[128..176]

00B1..00E0
[177..244]

0100..0130
[256..304]

0131..0160
[305..523]

0180..01B0
[384..432]

01B1..01E0
[433..480]

0200..0230
[512..560]

0231..0260
[561..608]

0280..02B0
[640..688]

02B1..02E0
[689..736]

0300..0330
[768..816]

0331..0360
[817..864]

0380..03B0
[896..944]

03B1..03E0
[945..992]

0400..0430
[1024..1072]

Contents Designation

Data register Rev. 02 Copy of the data register for de-

vice revision 02 to ensure com­patibility

Status register, PD0…PD47 Process data SCK channel 1

(device at T1)

MI0…MI47 Module information data SCK

channel 1 (device at T1)

Status register, PD0…PD47 Process data SCK channel 2

(device at T2)

MI0…MI47 Module information data SCK

channel 2 (device at T2)

Status register, PD0…PD47 Process data SCK channel 3

(device at T3)

MI0…MI47 Module information data SCK

channel 3 (device at T3)

Status register, PD0…PD47 Process data SCK channel 4

(device at T4)

MI0…MI47 Module information data SCK

channel 4 (device at T4)

Status register, PD0…PD47 Process data SCK channel 5

(device at T5)

MI0…MI47 Module information data SCK

channel 5 (device at T5)

Status register, PD0…PD47 Process data SCK channel 6

(device at T6)

MI0…MI47 Module information data SCK

channel 6 (device at T6)

Status register, PD0…PD47 Process data SCK channel 7

(device at T7)

MI0…MI47 Module information data SCK

channel 7 (device at T7)

Status register, PD0…PD47 Process data SCK channel 8

(device at T8)

105608_en_00 PHOENIX CONTACT 35

Solarcheck family

Table 5-2 Structure of the register areas [...]

Modbus address

Contents Designation

HEX [DEC]

0431..0460
[1073..1120]

0480..04B0
[1152..1200]

04B1..04E0
[1201..1248]

MI0…MI47 Module information data SCK

channel 8 (device at T8)

Status register, PD0…PD47 Process data SCK-C-MODBUS

device

MI0…MI47 Module information data SCK-

C-MODBUS device

The status register is always stored in the first register of the respective channel.

Example:

Channel Status register address Process data Module information data

3 (T3) 0280h From 0281h… From 02B1h…

5.2.3.2 Structure of the status register

The status register of each individual channel (T1…T8) is a 16-digit bitmasked word and
contains relevant information on the device status of the respective connected measuring
module. The status register of the communication module contains the relevant information
on the device status of the communication module.

Table 5-3 Structure of the status register

High byte Low byte

765432107 6 5 4 3210
00000000DISERNCCC0000

Bit Short name Meaning

4 CC Short circuit
5 NC Not connected (no module connected)
6 ER Error (communication error)
7 DIS Disabled (channel disabled)

5.2.3.3 Data registers of the connected measuring modules

In general, 48 items of process data and 48 items of module information data are available
per connected measuring module.

Various amounts of data are present depending on the device type; this data is successively
written to the available process data and module information data registers.

The communication module detects the connected measuring modules by their ID. This
form of detection means that invalid data and communication errors can be detected reli­ably.

The register tables for all modules in the Solarcheck device range can be found in “Register
tables” on page 85.

36

PHOENIX CONTACT 105608_en_00

SCK-C-MODBUS Solarcheck communication module

5.2.3.4 Compatibility with previous modules

The Revision 03 Solarcheck communication module is backwards compatible with its pre­decessor (Revision 02). Furthermore, the device is compatible with all existing Solarcheck
measuring modules, including devices from the previous generation (SCK-M-8S-20A,
Order No. 2901672).

This ensures that new and old-generation devices can be operated on the current commu­nication module. Mixed operation of devices from both generations is possible on a Revi­sion 03 communication module.

Furthermore, this ensures that the existing programming of the higher-level controller does
not have to be modified if a device is replaced.

5.3 Power supply

In addition to collecting data, the communication module also supplies power to the con­nected measuring modules. The power supply for the communication module and the con­nected measuring modules therefore has to be incorporated in the design.

– 24 V DC input voltage (-10% ... +25%)
– For current consumption, all connected measuring modules must also be taken into

consideration

Let us assume 20 mA for the communication module and the sum of the typical current con­sumption of all connected measuring modules. To account for the current peaks, the result
must be multiplied by 3. This calculation applies if 24 V is supplied. Otherwise, please refer
to the current consumption diagrams for the modules in “Design of the power supply” on
page 61.

105608_en_00 PHOENIX CONTACT 37

Solarcheck family

5.4 Technical data

Communication SCK-C-MODBUS (Order No. 2901674)

Supply

Supply voltage 24 V DC (-10% … +25%)

Typical internal power consumption 22 mA

Maximum internal power consumption 45 mA

Maximum current consumption 800 mA

Data interface for SCK bus

Cable type Twisted, shielded

Communication protocol Proprietary

Serial interface (RS-485)

Serial transmission speed 9.6 / 14.4 / 19.2 / 38.4 kbps

Cable length 1200 m, maximum

Cable type Twisted, shielded

Communication protocol Modbus RTU

Optional termination resistor (not supplied as standard) 180 Ω

Operating mode Half duplex

General data

Degree of protection IP20

Ambient temperature range (operation) -20°C ... 70°C

Ambient temperature range (storage) -40°C ... 85°C

Dimensions W / H / D 22.5 / 102 / 106 mm

Screw connection solid / stranded / AWG 0.2 ... 2.5 mm² / 0.2 ... 2.5 mm² / 24 - 12

Tightening torque 0.5 - 0.6 Nm

Humidity at 25°C, no condensation ≤ 95%

Altitude ≤ 2000 m

Installation on DIN rail 35 mm (DIN EN 50022)

Pollution degree 2

Conformance/approvals

Conformance CE-compliant

Referenced standard EN 61010-01:2011-7

Conformance with EMC Directive 2004/108/EC and
Low Voltage Directive 2006/95/EC

38

PHOENIX CONTACT 105608_en_00

6 Installation

2

T1

T2

T4

T3

+24v+24V

GND1

G

P

TX

RX

SCK-C-MODBUS

Order No: 2901674

T2 T1
T4 T3

+

2

4

v

+

2

4

V

G

N

D

1

G

N

D

1

P

O

W

E

R

T6 T5
T8 T7

9

6

5

7

1

3

8

4

8

G

N
D

2

G

N

D

2

B

A

COM

A

+24 V

B

GND1

GND2

GND2

GND1

+24 V

DC

DC

RS-485



C

INPUT

SCK-MODBUS

T1

T2

T3

T4

T5

T6

T7

T8

Installation

6.1 Connection description

SCK-C-MODBUS (Order No. 2901674)

1 Connection terminal blocks for SCK

measuring module T1 ... T4

2 Connection terminal blocks for SCK

measuring module T5 ... T8

3 Connection terminal blocks for +24 V

DC/GND1 power supply

4 Connection terminal blocks for RS-485

Modbus A (+)/B (-)

5 Green LED status/diagnostics indicator,

P - power supply, error diagnostics

6 Green LED status indicator,

TX - transmit data

7 Green LED status indicator,

RX - receive data

8 GND2, shield
9 Snap-on foot for DIN rail mounting

Block diagram

105608_en_00 PHOENIX CONTACT 39

Solarcheck family

P_OUT

SCK-M-I-8S-20A

Order No. 2903241

P

SCK BUS

D_IN

TX

0...10V

U

O

U
T

U

I
N

0...10V

GN

D

2

G

N

D1

STRIN

G

CURRENT

3

1

2

5

4

6

8

7

SCK-

BUS
OUT

U-IN

Digital

IN

1

+

–

2
3
4
5
6
7
8

I-IN

μ

C

COM

8x

0...10V

SCK-M-I-8S-20A (Order No. 2903241)

1 Connection terminal blocks for power

supply of optionally connected voltage
measuring module (P_OUT)

2 Analog input (0 ... 10 V)
3 Through connections for current mea-

surement 1 ... 8 (max. 20 A per connec­tion)

4 Snap-on foot for DIN rail mounting
5 Connection terminal blocks for digital

switch contact (D_IN)

6 Connection terminal blocks for commu-

nication cable (SCK BUS)

7 Green LED status indicator,

TX - transmit data

8 Green LED status/diagnostics indicator,

P - power supply, error diagnostics

Block diagram

40

PHOENIX CONTACT 105608_en_00

SCK-M-I-4S-20A (Order No. 2903242)

SCK-M-I-4S-20A

Order No. 2903242

P

SCK BUS

D_IN

TX

STRING
CURRENT

1

3

2

4

6

5

1
2
3
4

I-IN

m

C

SCK­BUS
OUT

COM

4x

Digital

IN

Block diagram

Installation

1 Through connections for current mea-

surement 1 ... 4 (max. 20 A per connec­tion)

2 Snap-on foot for DIN rail mounting
3 Connection terminal blocks for digital

switch contact (D_IN)

4 Connection terminal blocks for commu-

nication cable (SCK BUS)

5 Green LED status indicator,

TX - transmit data

6 Green LED status/diagnostics indicator,

P - power supply, error diagnostics

105608_en_00 PHOENIX CONTACT 41

Solarcheck family

1

3

2

4

5

0V

24V

GND2

10V

P _ IN

2 ... 10V OUT

U

1

U

2

U_OUT

P_IN

0 V

24 V

0...1500 V DC

R

X

R

X

1500 V DC!!!

32

3232

32

SCK-M-U-1500V (Order No. 2903591)

1 Connection for +/- PV system voltage
2 Snap-on foot for DIN rail mounting
3 PE grounding terminal blocks
4 Connection terminal blocks for +24 V/0 V

power supply

5 Connection terminal blocks for analog

voltage output 2 ... 10 V OUT

Block diagram

Important installation instructions:

42

PHOENIX CONTACT 105608_en_00

Installation

6.2 Measuring category and notes on insulation

The SCK-C-MODBUS communication module is assigned to measuring category CAT II
according to DIN EN 61010-2-30 and must therefore not be used in other category areas.
This means that the communication module is designed for use in low-voltage data pro­cessing. It must not be located in the immediate vicinity of equipment for power generation
or power distribution systems.

Table 6-1 Notes on insulation

SCK-C­MODBUS
(2901674)

Rated voltage

Surge voltage according
to IEC 61010

Pollution degree 2 2 2 2

The termination area of the devices must be inaccessible after installation to ensure suffi­cient protection against accidental contact with live parts (e.g., installation in a distributor
box or control cabinet).

In the case of the voltage measuring module, plexiglass covers should also be used to pro­tect against accidental contact.

SCK-M-I-8S­20A
(2903241)

SELV/PELV area

SCK-M-I-4S­20A
(2903242)

SCK-M-U­1500V
(2903591)

PV system
voltage,
max. 1500 V

6kV

6.3 Control cabinet

Snap the devices onto a 35 mm DIN rail according to DIN EN 50022 in the control cabinet.

NOTE: Degree of protection

The IP20 protection (IEC 60529/EN 60529) of the device is intended for use in a clean and
dry environment. Install the module in housing with at least IP54 protection according to
EN 60529. The stated limits concerning mechanical or thermal loads on the module must
not be exceeded.

105608_en_00 PHOENIX CONTACT 43

Solarcheck family

P

D

s

P

D

6.4 Cabling

The Solarcheck devices have been designed and tested according to IEC 61010 and cor­responding references to EMI behavior. As long as the installation instructions are followed
they will withstand the specified influences.

6.4.1 Installation instructions

In general, you should keep a sufficient distance between the power and data cables in
order to avoid interference from the generator. Furthermore, make sure that the data cables
are shielded properly and that the shield is connected correctly.

Installing the data cables and power cables in separate cable ducts is therefore the best and
recommended form of installation.

Figure 6-1 Distances between data and power cables

Option a: installation of data (D) and power (P) cables at distance (s)

Option b: installation of data (D) and power (P) cables in separately grounded cable ducts

44

PHOENIX CONTACT 105608_en_00

Installation

V

D

t

B
A

On the basis of the aforementioned DIN EN 50174 standard, let us take here as an example
a calculation of the required distances between data and power cables at defined power
levels and interference frequencies of 50 Hz. The interference frequencies in a PV field can
differ significantly and exert a greater influence accordingly. For example, for the most part
the inverter emits high-energy interference with 10 ... 20 kHz. A distance of at least 0.3 m
must always be maintained.

Table 6-2 Distances between data and power cables

Isolation distance (s) at 50 Hz

Power
(power cable)

Without cable
duct

Open metal cable
duct

Perforated
cable duct

30 A 0.06 m 0.05 m 0.03 m
120 A 0.24 m 0.18 m 0.12 m
300 A 0.6 m 0.45 m 0.3 m
600 A 1.2 m 0.9 m 0.6 m

Shielding and correct connection of the shield have a considerable effect on the signal qual­ity of data cables in PV systems. In order to prevent inductive interference couplings by the
PV power cables, the shield should be connected at both ends.

Example:

Figure 6-2 Influence of shielding on the signal quality

The left shows the differential signal (V) and the data quality (D) with shielding at both ends;
the right shows a differential signal affected by inductive interference coupling. This leads
to poor data quality. Communication is error-prone or not even possible, the device could
be destroyed.

105608_en_00 PHOENIX CONTACT 45

Solarcheck family

•

•

P

D

D

When installing the data cables, the cable routing is also an important consideration: never
install the data cables (D) parallel to the power cables (P). If crossovers are unavoidable,
data cables must cross at a right angle to the power cable.

Figure 6-3 Installation of the data cables

When installing the cables, note the following:
– Do not install the data cables in direct proximity parallel to the power cables (see

Figure 6-1 on page 44), instead install them in separate grounded metal cable ducts
with a cover, for example.

– Always install the data cables as close as possible to grounded metal parts such as

housing panels.
– Data cables may only cross power cables at a right angle (see Figure 6-3 on page 46).
– Avoid unnecessary cable lengths (antenna effect).
– For connection to ground, use suitable shield connection clamps such as the SK 35-D

shield connection clamp (Order No. 3026890).
– For shield connection to GND2 of the communication module, use suitable shield con-

nection clamps such as the ME-SAS shield connection clamp (Order No. 2853899).
– Remove the shielding only a few cm before the connection terminal block on the device.
– Untwist the twisted pairs only a few cm before the connection terminal block on the de-

vice.

46

PHOENIX CONTACT 105608_en_00

Installation

Please note the following recommendations for cabling.

Table 6-3 RS-485 cabling recommendations

RS-485

2

Cable 0.25 mm

, twisted pair, (double) shielding

Shielding Connect both ends of the outer shield to ground. Connect the

inner shield on the controller to ground and on the communi­cation module to GND2 only.

Surge protection For cables lengths > 10 m, install appropriate surge protection

for RS-485 data cables in the immediate vicinity of the SCK­C-MODBUS and of the higher-level controller (see “Accesso­ries” on page 110).

Repeater To decouple or improve signals in networks, e.g., to cover

large distances, a repeater can be inserted in the RS-485 net­work. For example, use a PSI-REP-RS485W2 (Order No.

2313096) for this.

Table 6-4 SCK bus cabling recommendations

SCK bus

2

Cable 0.75 mm

, twisted pair, single shielding
Shielding Connect both ends of the shielding to ground.
Surge protection For cables lengths > 10 m, install appropriate surge protection

for 24 V DC systems in the immediate vicinity of the SCK-C­MODBUS and of the connected Solarcheck measuring mod­ule (see “Accessories” on page 110).

Repeater A repeater cannot be used in the SCK bus cable as it would

affect power supply to the connected measuring devices.

SCK-M-U-1500V

Table 6-5 Analog connection/power supply cabling recommendations

Analog connection/power supply

2

Cable 0.75 mm

, twisted pair, single shielding, maximum length of

0.5 m

Shielding Connect both ends of the shielding to ground.

Table 6-6 Voltage connection cabling recommendations

Voltage connection

2

Cable ≥ 0.75 mm

, double insulated (appropriate to system volt-

age), short-circuit-proof and ground-fault-proof installation

105608_en_00 PHOENIX CONTACT 47

Solarcheck family

Table 6-7 PE connection cabling recommendations

PE connection

2

Cable Copper, 2.5 mm

/14 AWG, color code for PE

6.4.2 Material requirements

Only use suitable connecting cables:
– Copper cable, suitable for ambient temperatures up to 75°C
– Installation method must be appropriate for the ambient conditions
– Required tightening torque of 0.5 Nm ... 0.6 Nm

6.4.3 Cable lengths and conductor cross sections

Table 6-8 Recommended conductor cross sections for cable lengths up to 500 m

Type Cross section

RS-485 0.25 mm
SCK bus 0.75 mm
Analog connection (max. 0.5 m) 0.75 mm

2

2

2

The connection terminal blocks of the Solarcheck devices can accommodate cable cross
sections from 0.14 mm2 to 2.5 mm2. For the minimum connectable cross section of 0.14

2

, even cable lengths up to 300 m can be implemented between the measuring and

mm
communication module. However, such small cross sections are generally susceptible to
interference and a relatively high voltage drop in borderline cases (e.g., voltage on the sup­ply side already at the minimum limit) can mean that the devices in the field are not ade­quately supplied.

It is therefore strongly recommended that the above conductor cross sections are used. In
this case, distances of 500 m including the recommended surge protective devices (see
“Accessories” on page 110) can be covered.

There is no reliable information about operation at distances > 500 m between the measur­ing and communication module.

The cable length may be exceeded at the discretion of the installer, who is then responsible
for any such instances. In such cases it is recommended that a corresponding voltage drop
calculation is performed for the cable and that the surge protection elements that are used
are also taken into consideration. Furthermore, an on-site check should always be per­formed to determine whether the required supply voltage is available at the input of the So­larcheck devices under all operating conditions.

48

PHOENIX CONTACT 105608_en_00

Installation

T6

T5

T7

T8

G

N

D
2

G

N
D

2

B

A

COM

+24V

G
N

D
1

G

N
D

1

+24v+24V GND1 G

T

6

T

5

T

7

T

8

G

N

D

2

G

N

D

2

B

A

COM

+

2

4
v

+

2
4

V

G

N

D

1

G

+24V

G

N
D

1

G

N

D

1

+

2

4

V

ON

12345678

ON

12345678

6.5 Installing the SCK-C-MODBUS communication module

6.5.1 Addressing the SCK-C-MODBUS communication module

The device may only be opened to set the required address or baud rate.

The communication module may only be addressed when disconnected from the power
supply and from the RS-485 and SCK bus cables.

The Modbus address and the baud rate are binary coded with the eight DIP switches inside
the communication module. To set these properties, proceed as follows:

1. Carefully open the housing cover using a suitable screwdriver.

2. Remove the PCB.

3. Locate the DIP switches (top: Modbus address, bottom: baud rate).

105608_en_00 PHOENIX CONTACT 49

Solarcheck family

1

23

4

5

6

7

8

ON

ON

1

2

ON

123 45 67 8

1

Value

S

-

4

8

-

-

64

77

2=1

0

2=2

1

2=4

2

2=8

3

2=16

4

2=32

5

2=64

6

2 = 128

7

-

Address

T

6

T

5

T

7

T

8

G
N

D

2

G

N

D

2

B

A

C

O

M

+24v+24V GND1 G

+24V

G

N

D

1

G

N

D

1

4. Remove the protective foil from the DIP switches.

5. Set a valid Modbus address using a suitable tool, e.g., a micro screwdriver.

Optional: set the baud rate. The default setting is 9600 bps; other rates are possible.

6. Place the PCB onto the guide rails and carefully reinsert it in the housing as far as it will

go. Snap the housing cover into place.

50

PHOENIX CONTACT 105608_en_00

Installation

Changing the default settings

The default baud rate setting is 9600 bps. The baud rate can be changed to the following
values using DIP switches S1 … S4.

Table 6-9 Setting the baud rate

Baud rate [bps] S1 S2 S3 S4

9600 0 0 0 0
14400 1 0 0 0
19200 0 1 0 0
38400 1 1 0 0

Please note that fast baud rates are generally more susceptible to interference.

The default parity and stop bit settings can be changed using DIP switches S5 and S6 and
DIP switch S7.

Table 6-10 Setting the parity

Parity S5 S6

Even 1 0
Odd 1 1
None 0 x

Table 6-11 Setting the stop bits

Stop bits S7

10
21

105608_en_00 PHOENIX CONTACT 51

Solarcheck family

+
–

SCK-C-MODBUS

COM

GND2

OUT DC 24V

A

B

POWER

GND1

SCK-M-I-…

+24V

SCK BUS

T

1

P_OUT

GND1

U

OUT

0…10V

GND2

U

IN

D_IN

T

2

T

3

T

4

T

5

T

6

T

7

T

8

RS-485

POWER

+
–

6.5.2 Connecting the SCK-C-MODBUS communication module

Snap the device onto a 35 mm DIN rail according to DIN EN 50022 in the control cabinet.

Install the power supply, RS-485 communication, and the Solarcheck measuring devices as
per the connection description in Section 6.1 on page 39 and the following connection dia­gram:

Figure 6-4 Connection diagram for SCK-C-MODBUS

1. First, connect all of the desired measuring modules to the corresponding T inputs of the

device.
To do this, wire the data inputs (T1 … T8) to the respective data outputs of the measur-

ing modules (SCK BUS). Two cables are required for each data link to the measuring
modules. The cables may be swapped.

2. Next, connect the RS-485 connections.

To do this, wire data output A to the positive input of the RS-485 master and data output
B to the negative input of the RS-485 master. The internal shield of this cable can be
connected to the terminal block (GND2) so that the potential of the RS-485 network line
is also routed. Instead of the internal shield, a third wire can also be used, for example,
to route the potential in the RS-485 network. Also make sure that the external shield of
the data cable is always connected to ground at both ends so as to prevent inductive
couplings in the system from the power cables.

52

PHOENIX CONTACT 105608_en_00

Installation

BA

390



390



220



A B GND2 A B GND2

MODBUS RTU (RS-485)

R

T

ControllerSCK-C-MODBUSSCK-C-MODBUS

1...31 MODBUS slaves

3. Wire the Modbus devices present in the RS-485 network with a maximum length of

1200 m. Follow the cabling recommendations in “Cabling” on page 44 and terminate
the start and end of the network following the established procedure for RS-485 net­works.

Figure 6-5 Modbus connection

4. Finally, install the supply connections.

To do this, wire one of the supply inputs (+24V) or (GND1) to the positive or negative
output of the supply device.

The remaining two free terminal blocks of the supply input on the communication module
can be used to implement the supply to other 24 V devices as a parallel connection. Note
the design of the power supply for all connected devices.

In order to avoid possible arc discharge during installation, do not connect the devices while
the power is connected.

Only switch on the power supply once the Solarcheck devices have been installed.

105608_en_00 PHOENIX CONTACT 53

Solarcheck family

P_OUT

SCK-M-I-8S-20A

Order No. 2903241

P

SCK BUS

D_IN

TX

0...10V

U

OU

T

U

I
N

0...10V

G

N
D

2

G

N

D
1

STRING

CURRENT

78

5

2

3

6

1

4

6.6 Installing SCK-M-I-xx current measuring modules

Do not open or modify the device.

Snap the device onto a 35 mm DIN rail according to DIN EN 50022 in the control cabinet.

It is a good idea to install the PV string cables that are to be measured first.

Route the current measuring cables through the through connections indicated. The maxi­mum cable diameter of the current measuring cable including insulation must not exceed

9.5 mm.

Figure 6-6 Assignment of the current measuring channels

For current measurement, only use suitable solar cables with insulation and conductor
cross sections that are appropriate for the voltages and currents required in the system. For
the cable design in PV systems, see relevant references, e.g., in IEC 60364-7-712 or equiv­alent standards.

Observe the correct current flow direction for DC current measurement in the measuring
module.

As a guide, the required current flow direction is indicated with an arrow.

54

PHOENIX CONTACT 105608_en_00

Installation

SCK-C-MODBUS

COM

GND2

A

B

+

–

PE

POWER

GND1

SCK-M-I-8S-20A

P_OUT

0…10V

SCK BUS

GND1

0V

24V

+24V

SCK-M-U-1500V

P_IN

2…10V OUT

T

X

GND2

U

IN

U

OUT

GND2

10V

D_IN

VOLTAGE INPUT

MAX 1500V DC

SCK-C-MODBUS

COM

GND2

A

B

POWER

GND1

SCK-M-I-4S-20A

SCK BUS

+24V

T

X

D_IN

Next, install SCK communication, the digital input, and the analog interface as per the con­nection description in 6.1 on page 39 and the following connection diagram:

Figure 6-7 Connection diagram for SCK-M-I-8S-20A

105608_en_00 PHOENIX CONTACT 55

Figure 6-8 Connection diagram for SCK-M-I-4S-20A

Also follow the cabling recommendations in “Cabling” on page 44.

Solarcheck family

SCK-M-I-8S-20A

Order No. 2903241

P

SCK BUS

D_IN

TX

1214 11

FM

VAL-MS...

L– /

L+

NOTE: Risk of damage to equipment

Only wire floating switch contacts directly to the digital input. The digital signal input must
not be wired to an active signal.

Figure 6-9 Digital input connection

56

PHOENIX CONTACT 105608_en_00

Installation

32

3232

32

1500 V DC!!!

6.7 Installing the SCK-M-U-1500V voltage measuring module

NOTE: Risk of damage to equipment

Maintain the specified distance between the voltage measuring input and other conduc­tive parts in the vicinity. This safety distance must be observed in order to avoid electrical
sparkovers.

Figure 6-10 Mounting distances

WARNING: Risk of electric shock

Do not install voltage measurement while the system is in operation. High voltages may
be present in parts of the system even in diffuse daylight. Observe all statutory require­ments for live working.

Figure 6-11 High-voltage measurement connection

The module is usually connected to the corresponding 8-channel current measuring module
(SCK-M-I-8S-20A, Order No. 2903241).

105608_en_00 PHOENIX CONTACT 57

Solarcheck family

0V

24V

GND2

10V

P _ IN

2 ... 10V OUT

0V

24V

GND2

10V

P _ IN

2 ... 10V OUT

0,5...0,6 Nm

As an option, the voltage measuring module can also be operated as a simple analog mea­suring device outside of the Solarcheck device range. Two options are described below.

Do not open or modify the device.

Snap the device onto a 35 mm DIN rail according to EN 50022 in the control cabinet.

6.7.1 PE connection

Install the PE connection first. For PE connection, use suitable copper cables with a diam­eter of at least 2.5 mm2/14 AWG. Ensure reliable ground contact by using PE terminal
blocks, such as the UT 2,5 PE feed-through terminal block (Order No. 3044092).

Figure 6-12 PE connection

NOTE: Risk of damage to equipment

It is imperative that the PE contact is connected correctly, as in addition to its safety-re­lated function it is also used as the reference potential for measurement.

Operation without PE connection can result in damage to the device.

58

PHOENIX CONTACT 105608_en_00

Installation

P_OUT

SCK-M-I-8S-20A

Order No. 2903241

P

SCK BUS

D_IN

TX

0...10V

U

OUTUIN

0...10V

GND2GND1

STRING
CURRENT

0V

24V

GND2

10V

P _ IN 2 ... 10V OUT



0,5 m

SCK-M-U-1500V SCK-M-I-8S-20A

P_IN

P_OUT

0 V

24V

GND1
U

OUT

2...10V OUT

0...10V

GND2

10V

GND2
U

IN

VOLTAGE INPUT

MAX 1500V DC

+

-

PE

SCK BUS

D_IN

6.7.2 Connecting the measuring module to the SCK-M-I-8S-20A

Solarcheck current measuring module

Connect the analog signal cable to the corresponding outputs (2 ... 10 V OUT) on the volt­age measuring module and wire them to the analog input of the current measuring module
(0 ... 10 V IN).

Figure 6-13 Connection to the SCK-M-I-8S-20A module

The cable length between these two devices must not exceed 0.5 m.

To supply the voltage measuring module, wire the supply input (P_IN) to the corresponding
supply output on the current measuring module (P_OUT).

Use twisted and shielded cables for all signal and supply cables to avoid electromagnetic
interference from the PV generator (e.g., via the string or bus cables). Ground the shield.

105608_en_00 PHOENIX CONTACT 59

Solarcheck family

IN AC 100-240V

L

N

NC

NC

Class 2
Power Supply

DC

OUT DC 24V 1.3A

MINI POWER

OK

Class 2
Power Supply

DC
OK

22,5­28,5
V DC

MRESET

STOP

RUN/PROG

LNK ACT

0V

24V

GND2

10V

P _ IN

2 ... 10V OUT

SCK-M-U-1500V Power

P_IN

OUT DC 24 V

0 V

24V

+

-

2...10V OUT

GND2

10V

U-

IN

U+

IN

VOLTAGE INPUT

MAX 1500V DC

+

-

PE

Analog IN

6.7.3 Connecting the measuring module outside of the Solar-

check device range

The voltage measuring module can also be used as a simple analog measuring transducer
outside of the Solarcheck device range. For this, connect the signal output (2 ... 10 V OUT)
to a suitable analog voltage input of an evaluation unit.

Figure 6-14 Connection outside of the Solarcheck device range

Make sure the load does not fall below 10 k.

The cable length between these two devices must not exceed 0.5 m.

In this case, power is not supplied via the Solarcheck devices, it is supplied separately; for
further details on the design, refer to “Design of a separate power supply for the SCK-M-U­1500V voltage measuring module” on page 63.

Use twisted and shielded cables for all signal and supply cables to avoid electromagnetic
interference from the PV generator (e.g., via the string or bus cables). Ground the shield.

6.7.4 Connecting voltage measurement

To connect voltage measurement, use suitable cables with appropriate insulation for your
system voltage (double or reinforced insulation).

The installation and connection of cables must be short-circuit-proof and ground-fault­proof. Tap the voltage at suitable points in the string combiner box in parallel and connect
the negative and positive poles to the corresponding connection terminal blocks.

Voltage measurement can be used in PV systems grounded on the positive or negative side
as well as in ungrounded PV systems with voltages up to 1500 V DC.

The specified measuring accuracy applies for the 100 ... 1500 V DC measuring range.

Snap the device onto a 35 mm DIN rail according to DIN EN 50022 in the control cabinet.

60

PHOENIX CONTACT 105608_en_00

Installation

0

100

200

300

400

500

600

700

0

5

10

15

20

25

30

35

40

0 5 10 15 20 25 30 35

45

50

P [mW]

I [mA]

U [V]

U = 21,6…30 V

N

P [mW]

I [mA]

6.8 Power supply for the Solarcheck devices

NOTE:

Only use power supply units with safe isolation and SELV/PELV according to
EN 50178/VDE 0160 (SELV/PELV)

Use shielded twisted pair cables for the supply cable.

Ground the 24 V supply just once on the power supply unit.

6.8.1 Design of the power supply

In addition to collecting data, the communication module also supplies power to the con­nected measuring modules. The power supply for the communication module and the con­nected measuring modules therefore has to be incorporated in the design.

– 24 V DC input voltage (-10% ... +25%)
– For current consumption, all connected measuring modules must also be taken into

consideration

Let us assume 22 mA for the communication module and the sum of the typical current con­sumption of all connected measuring modules. To account for the current peaks, the result
must be multiplied by 3. This calculation applies if 24 V is supplied. Otherwise, please refer
to the current consumption diagrams for the modules.

Figure 6-15 Performance characteristics of the SCK-C-MODBUS communication

105608_en_00 PHOENIX CONTACT 61

module without connected measuring devices

Solarcheck family

0

500

1000

1500

2000

2500

0 5 10 15 20 25 30 35

P [mW]

I [mA]

U [V]

U = 21,6…30 V

N

P [mW]

I [mA]

0

10

20

30

40

50

60

70

80

90

Figure 6-16 Performance characteristics of the communication module (SCK-C-MOD-

BUS) with connected measuring modules (SCK-M-I-…) including voltage
measuring modules (SCK-M-U-1500V)

The typical values for current consumption apply if the input voltage is in the required range
of 24 V DC. If the inp ut voltage d rop s, curr ent consumption may increase up to the specified
maximum value. Any further deviation results in device shutdown.

Example:
1 x SCK-C-MODBUS with 8 connected SCK-M-I-8S-20A modules each of which includes
voltage measurement via SCK-M-U-1500V

Table 6-12 Current consumption

Module Typical (at 24 V) Maximum

SCK-C-MODBUS 22 mA 45 mA
SCK-M-I-8S-20A 43 mA 50 mA
SCK-M-U-1500V 8 mA 65 mA

22 mA + (8 x (43 mA + 8 mA)) = 430 mA

With safety factor 3  1290 mA

62

PHOENIX CONTACT 105608_en_00

Installation

0

50

100

150

200

250

0 5 10 15 20 25 30 35

P [mW]

I [mA]

U [V]

U = 21,6…30 V

N

P [mW]

I [mA]

0

10

20

30

40

50

60

70

300

6.8.2 Design of a separate power supply for the SCK-M-U-1500V

voltage measuring module

The voltage measuring module can also be used as a simple analog measuring transducer
outside of the Solarcheck device range. In this case, power is not supplied via the connec­tion to the SCK-M-I-8S-20A Solarcheck current measuring module, it must be supplied sep­arately instead. A 24 V DC power supply must be provided. The typical current consumption
is 8 mA. The maximum current consumption is 65 mA. The maximum current consumption
only occurs if the value falls significantly below the minimum input voltage.

Figure 6-17 Performance characteristics of the voltage measuring module (SCK-M-U-

105608_en_00 PHOENIX CONTACT 63

1500V)

Solarcheck family

64

PHOENIX CONTACT 105608_en_00

7Startup

Internal error

P: Power (green)

Tx: Send data (green)

Rx: Receive data (green)

Internal error, connection error

Sending data

Receiving data

No communication

No communication

OK

Communication error

1.4 Hz

2.8 Hz

LED on

LED flashing

... Hz

LED off

Startup

Install the devices as described in the installation instructions.

Then switch on the power supply to the devices. The communication devices take around
10 s to initialize. During this time, the start routine is indicated by the various flashing signals
of the LEDs.

Start routine:
– 3 s LED test
– Ready for RS-485 communication
– Identify connected measuring modules
– Start cyclic data retrieval for connected measuring modules (see description in “SCK-

internal communication cycle” on page 33)

If an error is detected when the modules are started, this is indicated by a flashing signal at
the POWER LED on completion of the LED test.

The following signals are displayed:

105608_en_00 PHOENIX CONTACT 65

Figure 7-1 LED indicators

Solarcheck family

66

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8 Additional functions

8.1 Energy-saving mode

So that the energy balance of the overall photovoltaic system is influenced as little as pos­sible, the energy demands of a monitoring system should be very low. This is why the So­larcheck communication module has a switch-off function. This function is simply activated
by setting a time value (in seconds) in one of the registers for the communication module.
The module then remains in energy-saving mode for the specified time, meaning that the
connected measuring modules are switched off. Once this time has elapsed, the communi­cation module independently resumes communication and power supply to the connected
measuring units. In this way, the energy used by monitoring equipment can be significantly
reduced.

Example: switching off nighttime monitoring

Because the PV system does not operate at night, for example, nighttime monitoring for cur­rent and voltage measurement is not necessary either as there are no corresponding values
during this time. Therefore monitoring could be switched off for 10 hours (21:00 to 07:00),
for example. Depending on the location of the system and the time of year, the shutdown
period can be further extended.

Nevertheless, if for example status monitoring is sporadically requested during the inactive
nighttime period, it is possible to program a cycle to wake up the system for a few minutes,
for example.

The individual operating time of the devices can be designed completely via the higher-level
controller.

Additional functions

Programming shutdown:

A USIGN16 bit value is stored in register 04AEh for the required time.

Table 8-1 Assignment time - register value

Time Register value

10 s 10 (decimal)
60 s 60 (decimal)
5 min 300 (decimal)
1 hr 3600 (decimal)

Entry of the value immediately places the module in energy-saving mode. The mode is ac­tive for at least 10 s (minimum value) and can be extended to 18.2 hours (65535 s, maxi­mum value). Writing the value to the register must therefore be supported on the controller
side with a corresponding timer. Energy-saving mode is either stopped automatically after
the set time has elapsed or by manually setting the time value in the register to “0” via the
controller.

The devices then start automatically and run as described for startup in 7 on page 65.

105608_en_00 PHOENIX CONTACT 67

Solarcheck family

T7

T8

T5T6

COM

GND2GND2 B A

+24V

GND1GND1

T7

T8

T5T6

COM

GND2GND2 B A

+24V

GND1GND1

T7

T8

T5T6

COM

GND2GND2 B A

+24V

GND1GND1

PLC

ID2

# 50 s

RS-485 Bus

ID1 ID2 ID3

50 s

8.2 Locate function

Large photovoltaic power stations require good logistics and documentation in order to as­sign data to the actual position in the field. Checking the assignment is an important and to
some extent time-consuming task during startup. In order to support and simplify this as­signment, the Solarcheck communication module features a simple locate function. By set­ting a time value in a special register, the respective communication module is immediately
placed in locate mode. It remains in this operating state until the specified time has elapsed
or the module is restarted manually. This state is also exited by manually setting the time
value to “0”. The communication module can indicate locate mode by flashing all existing
LEDs at a uniform frequency of 0.7 Hz. This behavior clearly distinguishes the module from
other communication modules regardless of which operating state they are in. Because lo­cate mode is activated via the controller, this allows the programmed modu le I D t o be c le arly
assigned to the actual device.

The communication mode is still active while the modules are in locate mode, so measured
data is not lost during this time. The connected measuring modules likewise continue oper­ating normally.

Example:

The time entry is set in register 04AFh of the corresponding module.
The value is stored in the register as USIGN16.
The minimum value is 5 s (5 decimal) and the maximum value is 18.2 hrs (65535 decimal).

Figure 8-1 Schematic view of the locate function

68

PHOENIX CONTACT 105608_en_00

Additional functions

I = 6,7 A

I = 6,3 A

I = 6,1 A

PV 1

PV 2

PV 3

I = 0,4 A

I = 0,2 A

I = 0,0 A

PV 1

PV 2

PV 3

I=N0 A

I = 6,7 A (-0,4 A) = 6,3 A

I=

I=

PV 1

PV 2

PV 3

6,3 A (-0,2 A) = 6,1 A

6,1 A (-0 A) = 6,1 A

=

~

8.3 System calibration

The measuring inputs of all measuring modules are tested and calibrated to high quality
standards in the factory. However, due to the physical characteristics of Hall sensor mea­surement, under certain circumstances it is possible to generate an offset in the current
measured value caused by magnetization. Very abrupt current edges, which are rather un­usual in photovoltaics, or geological conditions can cause such effects.

Where present, this measured value offset is usually consistent. This means that the mea­sured values are always increased by the same basic value. This type of offset can be de­tected permanently when the PV generator is switched off but a constant low current value
is still displayed above the specified deviation of measurement. For example, at night when
it is guaranteed that there is no current flowing and the displayed measured value shows,
e.g., 0.4 A.

In this type of situation, the entire measuring system can simply be calibrated.

To do this, the current value of all measuring channels is recorded in a defined “zero-current
situation” (e.g., the middle of the night) and temporarily stored. This value is the offset which
would increase the actual current values for the operating time during the day.

Take this temporarily stored value and permanently subtract it from the measured value re­corded during the day.

This zero calibration can also be performed each night, for example, to improve general
measuring accuracy, without an actual offset being generated.

Figure 8-2 System calibration

105608_en_00 PHOENIX CONTACT 69

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70

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9 Installation examples

ILC 150 ETH
Order-No.: 2985330
HW/FW: 00/100

MAC Addr.: 00.A0.48.04.09.C0

AUTOMATIONWORX

MRESET

RESET

RUN/PROG

PRG

STOP

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

LINK

Inverter station

String combiner box

PV field

Communication device

(to connect up to

8 measuring devices)

Measuring device
for string current

Compact controller

Here you will find some typical installation examples for medium to large PV systems. The
examples are schematic and simply illustrate a few possible installation options. The mod­ularity of the Solarcheck system means that many other arrangements and combinations
are possible. Solarcheck is a very flexible system which can be effectively incorporated into
many system designs, making inexpensive solutions possible.

9.1 Example 1

SCK-C-MODBUS installed centrally in the inverter station. Solarcheck current mea­suring module(s) without voltage measurement installed in the string combiner box
in the PV field.

The traditional arrangement involves installing the communication module at a central loca­tion, which allows the advantages of the modular system structure to be demonstrated to
very great effect. Therefore, because power is supplied to the measuring devices in the field
via the Solarcheck communication cable, a particularly efficient and inexpensive design for
the power supply of the overall Solarcheck system is possible.

Installation examples

Figure 9-1 SCK-C-MODBUS in the inverter station, current measuring module without

voltage measurement in the string combiner box

105608_en_00 PHOENIX CONTACT 71

Solarcheck family

ILC 150 ETH
Order-No.: 2985330
HW/FW: 00/100

MAC Addr.: 00.A0.48.04.09.C0

AUTOMATIONWORX

MRESET

RESET

RUN/PROG

PRG

STOP

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

LINK

Inverter station

String combiner box

PV field

Communication device

(to connect up to

8 measuring devices)

Measuring device
for string current

Measuring device

for voltage

Compact controller

9.2 Example 2

SCK-C-MODBUS installed centrally in the inverter station. Solarcheck current mea­suring module(s) and voltage measuring modules installed in the string combiner
box in the PV field.

If the voltage is to be acquired at string level, positioning the voltage measuring module in
the string combiner box is advised. In this case, the analog input of the SCK-M-I-8S-20A
current measuring module, which is specifically designed for this purpose, can be used for
the power supply and data connection of the SCK-M-U-1500V voltage measuring module.
A separate power supply for voltage measurement does not have to be provided here ei­ther. Likewise, the voltage data is available via the Solarcheck protocol.

Of course, it is possible to equip one or just a few string combiner boxes with additional volt­age measurement in each system segment, because the string voltage in the system seg­ment is usually the same everywhere due to the parallel connection.

Figure 9-2 SCK-C-MODBUS in the inverter station, current measuring module with

voltage measurement in the string combiner box

72

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Installation examples

Communication device

(to connect up to

8 measuring devices)

Measuring device
for string current

Compact controller

ILC 150 ETH
Order-No.: 2985330
HW/FW: 00/100

MAC Addr.: 00.A0.48.04.09.C0

AUTOMATIONWORX

MRESET

RESET

RUN/PROG

PRG

STOP

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

LINK

Measuring

device for voltage

Inverter station

String combiner box

PV field

Power Suppley

9.3 Example 3

SCK-C-MODBUS installed centrally in the inverter station. Solarcheck current mea­suring module(s) installed in the string combiner box in the PV field. Higher-level
voltage measurement for each system segment.

As already indicated under Example 2, the typical parallel connection of strings in large PV
systems means that the voltage in a system segment is usually the same.

This means that voltage data can be acquired very effectively and economically. Voltage
measurement via the SCK-M-U-1500V voltage measuring module can also be used outside
of the Solarcheck device topology.

In this case, the device is used as a simple analog device in the string combiner boxes. In
this scenario, the power supply and data connection for the device must be implemented
separately. This method of use is very inexpensive, as only one voltage measuring module
is required per system segment.

Figure 9-3 SCK-C-MODBUS in the inverter station, current measuring module in the

string combiner box, SCK-M-U-1500V at higher level

105608_en_00 PHOENIX CONTACT 73

Solarcheck family

Inverter station

String combiner box

PV field

Measuring device

for string current

Central control room

String combiner box

Communication device

(to connect up to

8 measuring devices)

Compact controller

ILC 150 ETH
Order-No.: 2985330
HW/FW: 00/100

MAC Addr.: 00.A0.48.04.09.C0

AUTOMATIONWORX

MRESET

RESET

RUN/PROG

PRG

STOP

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

1.1 2.1

1.2 2.2

1.3 2.3

1.4 2.4

LINK

Com-box

9.4 Example 4

SCK-C-MODBUS installed in the communication box. Solarcheck current measur­ing module(s) installed in the string combiner box in the PV field.

Due to the system design, a distributed arrangement of the communication modules in a
system may also be worthwhile. The use of a communication box is recommended here, so
that the power supply and any other communication units (controller, wireless modules, RS­485/Ethernet converter, etc.) can be housed in this communication box. This arrangement
also makes good use of the modularity of the Solarcheck system.

The arrangement can of course also be combined with the other examples listed (e.g., to
also incorporate voltage measurement).

Figure 9-4 SCK-C-MODBUS in separate communication box, current measuring

module without voltage measurement in the string combiner box

74

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10 Troubleshooting

Internal error

P: Power (green)

Tx: Send data (green)

Rx: Receive data (green)

Internal error, connection error

Sending data

Receiving data

No communication

No communication

OK

Communication error

1.4 Hz

2.8 Hz

LED on

LED flashing

... Hz

LED off

In the event of errors or malfunction during startup or operation, this table can be used to
perform initial diagnostics locally and to possibly even remove the error cause directly. If
troubleshooting using this table is not possible, please contact your Phoenix Contact repre­sentative.

Error states can be read on the device via the LED indicators or by reading the status reg­isters.

Troubleshooting

105608_en_00 PHOENIX CONTACT 75

Figure 10-1 LED indicators

Table 10-1 Structure of the status register

High byte Low byte

765432107 6 5 4 3210
00000000DISERNCCC0000

Bit Short name Meaning

4 CC Short circuit
5 NC Not connected (no module connected)
6 ER Error (communication error)
7 DIS Disabled (channel disabled)

Solarcheck family

10.1 Diagnostics and error removal

Table 10-2 Scenario 1: SCK-C-MODBUS

Device/
error description

SCK-C-MODBUS (2901674)

There is no data from one or more
connected measuring modules.

Cause

Short circuit on the SCK bus connection.

Measures

1. Locate the short circuit: disconnect all measuring modules from the communication
module one at a time until the affected cable is found.

2. Check the affected cable and remove the short circuit.

3. After removing the error cause, test the function of the modules. The short-circuit
message should no longer be present in the status register.

4. If the message is still present:
a) The short circuit has not been removed completely  see item 1.
Or b) Internal components have been damaged by the short circuit (high currents

possible). In this case, replace the communication module.

Table 10-3 Scenario 2: SCK-C-MODBUS

Device/
error description

SCK-C-MODBUS (2901674)

There is no data from one or more con­nected measuring modules.

Cause

There is no connection to the measuring module at the affected input.

Measures

1. Check the affected cable.

2. Check whether the SCK BUS plug of the affected measuring module is connected
correctly.

3. Correct the connection, if necessary.

4. After removing the error cause, test the function of the affected modules.

5. If the message is still present:
a) The connection is still faulty  see item 1.

Or b) Internal components have been damaged. In this case, replace the communi­cation module.

Status register LED indicator

Entry “1” in bit 4 of the low
byte
(0001 0000)

Status register LED indicator

Entry “1” in bit 5 of the
low byte
(0010 0000)

POWER LED:
flashing (1.4 Hz)

POWER LED:
permanently ON

76

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Table 10-4 Scenario 3: SCK-C-MODBUS

Troubleshooting

Device/

Status register LED indicator

error description

SCK-C-MODBUS (2901674)

There is no data or incorrect data from
one or more connected measuring
modules.

Entry “1” in bit 6 of the
low byte
(0100 0000)

POWER LED:
flashing (1.4 Hz)
and/or
Tx LED lights up spo­radically

Cause

Data transmission to the affected measuring module is faulty.

Measures

1. Check the shielding and installation of the affected SCK bus data cable (see Section

2.2 on page 15 and 6.4 on page 44).

2. Remove any interference couplings.

3. After removing the error cause, test the function of the affected device.

4. If the message is still present:
a) The connection is still faulty or disrupted  see item 1.

Or b) Internal components have been damaged. In this case, replace the communi­cation module.

5. For closer examination of the data quality, it is recommended that you record the sig­nals on the SCK BUS cable using an oscilloscope.

Table 10-5 Scenario 4: SCK-C-MODBUS

Device/

Status register LED indicator

error description

SCK-C-MODBUS (2901674)

There is no data from one or more con­nected measuring modules.

Entry “1” in bit 7 of the
low byte
(1000 0000)

POWER LED:
permanently ON

Cause

The affected module or measuring modules connected to it were switched off by the en­ergy-saving function.

Measures

1. If shutdown was not planned, check the source text of your program and remove the
setting for the energy-saving function (see Section 8.1 on page 67).

2. After disabling the energy-saving function, test the function of the affected module. If
it remains switched off and the register entry is set to “0”, an error is present. Send in
the device.

105608_en_00 PHOENIX CONTACT 77

Solarcheck family

Table 10-6 Scenario 5: SCK-C-MODBUS

Device/

Status register LED indicator

error description

SCK-C-MODBUS (2901674)

There is no data from the communication

No entry POWER LED:

flashing (2.8 Hz)

module and the connected measuring
modules.

Cause

An internal error has occurred.

Measures

1. Replace the communication module.

Table 10-7 Scenario 6: SCK-C-MODBUS

Device/

Status register LED indicator

error description

SCK-C-MODBUS (2901674)

Data is regularly unavailable or is out of date.

No entry POWER LED:

permanently ON

Cause

The SCK internal cycle time is longer than the retrieval interval at the controller.

Measures

1. Set a retrieval interval > 2 s at the controller.

2. Faulty data can extend the internal cycle time. Check the data quality as described for
Scenario 3 in Table 10-4 on page 77.

78

PHOENIX CONTACT 105608_en_00

Table 10-8 Scenario 7: SCK-M-I-...

Troubleshooting

Device/

Status register LED indicator

error description

SCK-M-I-... (2903241, 2903242)

Module switches off automatically or remains in

No entry POWER LED:

ON/OFF

an on/off loop.

Cause

If the supply voltage at the measuring module input falls below approximately 16 V, the
module current consumption increases rapidly. Internal safety mechanisms then switch
off the module.

The module restarts automatically after 10 s. If the cause of the low voltage and the high
current is not removed, the module switches off again. The module gets stuck in an on/off
loop.

Measures

1. Provide the necessary power supply to the module. Voltage drops can be caused by
underdimensioned power supply equipment, incorrectly dimensioned cabling or ex­ternal factors influencing the cabling.

Table 10-9 Scenario 8: SCK-M-I-8S-20A

Device/

Status register LED indicator

error description

SCK-M-I-8S-20A (2903241)

The current values of the string are all displayed as

No entry POWER LED:

ON

reverse current (-1.5 A).

Cause

The current measuring module has been installed incorrectly. Current measurement is
dependent on the current direction.

Measures

1. Install the module the other way. Route the string cables from the other side through
the holes in the device (see Section 6.6 on page 54). The current direction is indicat­ed on the device with an arrow.

105608_en_00 PHOENIX CONTACT 79

Solarcheck family

Table 10-10 Scenario 9: SCK-M-I-8S-20A

Device/

Status register LED indicator

error description

SCK-M-I-8S-20A (2903241)

The current values do not correspond.

No entry POWER LED:

ON

Cause

– Data transmission is disrupted between the measuring and communication modules

and causes incorrect values in the current value registers.

– The measuring channels were magnetized.

Measures

1. In the case of incorrect transmission-related values, proceed as described in Scenar­io 3 in Table 10-4 on page 77.

2. In the case of permanently altered measured values, check whether a current value
is also present in defined “zero current situations” (e.g., at night). If this is the case,
an offset has been caused by magnetization. Proceed as described in Section 8.3 on
page 69.

Note: corresponding tests on the devices have shown that the components used are very
resistant to magnetization. Magnetization therefore occurs very rarely. Nevertheless, it
can be caused by multiple rising high current edges in the µs range, for example. These
edges are not usually present in PV systems.

Table 10-11 Scenario 10: SCK-M-I-8S-20A / SCK-M-U-1500V

Device/

Status register LED indicator

error description

SCK-M-I-8S-20A (2903241) /
SCK-M-U-1500V (2903591)

No entry POWER LED:

ON

Data from the connected SCK-M-U-1500V
voltage measuring module is incorrect.

Cause

The value is outside the valid voltage range of the module.

Measures

1. Make sure that the value does not go outside the valid voltage range of the device
(see Section 4.1.1 on page 25) .

80

PHOENIX CONTACT 105608_en_00

Table 10-12 Scenario 11: SCK-M-I-8S-20A / other analog device

Troubleshooting

Device/

Status register LED indicator

error description

SCK-M-I-8S-20A (2903241) /
other analog device

No entry POWER LED:

ON

Data from the connected analog device is incor­rect.

Cause

The analog device is not electrically isolated from the power supply of the Solarcheck
communication module. This affects the voltage value at the analog input of the SCK-M­I-8S-20A.

Measures

1. Make sure that the supply for the analog device and the Solarcheck communication
module are electrically isolated. For example, use a separate power supply for the
analog device.

Table 10-13 Scenario 12: SCK-M-U-1500V

Device/

Status register LED indicator

error description

SCK-M-U-1500V (2903591)

There is a voltage between 0…2V at the analog

No entry POWER LED:

ON

input of the SCK-M-I-8S-20A or the controller.

Cause

A cable break has occurred or there is a faulty connection between the SCK-M-U-1500V
and the SCK-M-I-8S-20A or controller. This error can be detected with the “live zero” sig­nal.

Measures

1. Check the connection between the devices and remove the error.

105608_en_00 PHOENIX CONTACT 81

Solarcheck family

10.2 Additional notes

– In photovoltaic systems, the installation and surrounding area can influence the data

technology in various ways. Effective error localization is usually inexpensive and more
effective than simply replacing devices. Error causes must be removed reliably and
permanently so as to ensure the added value achieved by monitoring your operating
data for the long term as well.

– For troubleshooting, it is recommended that you disconnect the affected modules from

the rest of the system and test the replacement modules as they are incorporated in the
system. Successive testing should always be carried out to isolate errors and their lo­cation. When carrying out troubleshooting, always perform before/after comparisons.

– In the case of troubleshooting on the RS-485 side of the device, other baud rates can

also be set for test purposes:

Table 10-14 Baud rates

DIP8 DIP7 DIP6 DIP5 DIP4 DIP3 DIP2 DIP1

Baud rate Parity No. of

9600 - - X X X X 0 0 0 0

14400 - - X X X X 0 0 0 1

19200 - - X X X X 0 0 1 0

38400 - - X X X X 0 0 1 1

57600 - - X X X X 0 1 0 0

76800 - - X X X X 0 1 0 1

115200 - - X X X X 0 1 1 0

230400 - - X X X X 0 1 1 1

75 - - X X X X 1 0 0 0

150 - - X X X X 1 0 0 1

300 - - X X X X 1 0 1 0

600 - - X X X X 1 0 1 1

1200 - - X X X X 1 1 0 0

2400 - - X X X X 1 1 0 1

4800 - - X X X X 1 1 1 0

7200 - - X X X X 1 1 1 1

- None - X X X 0 X X X X

-Even-XX01XXXX

- Odd - X X 1 1 X X X X

- - 1 stop

- - 2 stop

stop
bits

bit

bits

Not
used

X0X X XXXX

X 1 X X X X X X

Stop
bit

Parity
mode

Acti­vate
parity

Baud
rate

1 – ON

0 – OFF

X – either

82

PHOENIX CONTACT 105608_en_00

Troubleshooting

– If other analog devices are connected to the SCK-M-I-8S-20A, you must make sure that

the connected analog device is electrically isolated from the supply of the remaining
Solarcheck devices. Otherwise invalid values may occur on the analog input side.

– In the event of communication errors, the communication module is set to the “Timeout”

state after 10 s.

105608_en_00 PHOENIX CONTACT 83

Solarcheck family

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A Appendix

A 1 Register tables

The Modbus address area is divided into 10 ranges.

Ranges 1 ... 9 contain module information (MI) and process data (PD) for the SCK inter­faces. The registers in these ranges can only be read.

Range 10 contains module information (MI) and process data (PD) for the SCK-C-MOD­BUS module. All the data can be read. Some of the data can be written as well (see “Locate
function” on page 68 and “Energy-saving mode” on page 67, for example).

105608_en_00 PHOENIX CONTACT 85

Solarcheck family

A 1.1 Registers - data assignment

Table A-1 Illustration of the register table for reading 2901672 (Modbus address

0000h..005Ch)

Modbus

Name Unit Modbus address (HEX)

0000 SCK channel 1

0001 SCK channel 1

0002 SCK channel 1

0003 SCK channel 1

0004 SCK channel 1

0005 SCK channel 1

0006 SCK channel 1

0007 SCK channel 1

0008 SCK channel 1

0009 SCK channel 1

000A SCK channel 1

000B SCK channel 2

000C SCK channel 2

000D SCK channel 2

000E SCK channel 2

000F SCK channel 2

0010 SCK channel 2

0011 SCK channel 2

0012 SCK channel 2

0013 SCK channel 2

0014 SCK channel 2

0015 SCK channel 2

0016 SCK channel 3

0017 SCK channel 3

status

current 1

current 2

current 3

current 4

current 5

current 6

current 7

current 8

temp.

voltage

status

current 1

current 2

current 3

current 4

current 5

current 6

current 7

current 8

temp.

voltage

status

current 1

Name Unit address (HEX)

Bit mask 0030 SCK channel 5

Ix100 [A] 0031 SCK channel 5

Ix100 [A] 0032 SCK channel 5

Ix100 [A] 0033 SCK channel 5

Ix100 [A] 0034 SCK channel 5

Ix100 [A] 0035 SCK channel 5

Ix100 [A] 0036 SCK channel 5

Ix100 [A] 0037 SCK channel 6

Ix100 [A] 0038 SCK channel 6

[°C] 0039 SCK channel 6

[V] 003A SCK channel 6

Bit mask 003B SCK channel 6

Ix100 [A] 003C SCK channel 6

Ix100 [A] 003D SCK channel 6

Ix100 [A] 003E SCK channel 6

Ix100 [A] 003F SCK channel 6

Ix100 [A] 0040 SCK channel 6

Ix100 [A] 0041 SCK channel 6

Ix100 [A] 0042 SCK channel 7

Ix100 [A] 0043 SCK channel 7

[°C] 0044 SCK channel 7

[V] 0045 SCK channel 7

Bit mask 0046 SCK channel 7

Ix100 [A] 0047 SCK channel 7

current 4

current 5

current 6

current 7

current 8

temp.

voltage

status

current 1

current 2

current 3

current 4

current 5

current 6

current 7

current 8

temp.

voltage

status

current 1

current 2

current 3

current 4

current 5

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

[°C]

[V]

Bit mask

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

[°C]

[V]

Bit mask

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

86

PHOENIX CONTACT 105608_en_00

Register tables

Table A-1 Illustration of the register table for reading 2901672 (Modbus address

0000h..005Ch) [...]

Modbus

Name Unit Modbus
address
(HEX)

0018 SCK channel 3

0019 SCK channel 3

001A SCK channel 3

001B SCK channel 3

001C SCK channel 3

001D SCK channel 3

001E SCK channel 3

001F SCK channel 3

0020 SCK channel 3

0021 SCK channel 4

0022 SCK channel 4

0023 SCK channel 4

0024 SCK channel 4

0025 SCK channel 4

0026 SCK channel 4

0027 SCK channel 4

0028 SCK channel 4

0029 SCK channel 4

002A SCK channel 4

002B SCK channel 4

002C SCK channel 5

002D SCK channel 5

002E SCK channel 5

002F SCK channel 5

current 2

current 3

current 4

current 5

current 6

current 7

current 8

temp.

voltage

status

current 1

current 2

current 3

current 4

current 5

current 6

current 7

current 8

temp.

voltage

status

current 1

current 2

current 3

Name Unit
address
(HEX)

Ix100 [A] 0048 SCK channel 7

Ix100 [A] 0049 SCK channel 7

Ix100 [A] 004A SCK channel 7

Ix100 [A] 004B SCK channel 7

Ix100 [A] 004C SCK channel 7

Ix100 [A] 004D SCK channel 8

Ix100 [A] 004E SCK channel 8

[°C] 004F SCK channel 8

[V] 0050 SCK channel 8

Bit mask 0051 SCK channel 8

Ix100 [A] 0052 SCK channel 8

Ix100 [A] 0053 SCK channel 8

Ix100 [A] 0054 SCK channel 8

Ix100 [A] 0055 SCK channel 8

Ix100 [A] 0056 SCK channel 8

Ix100 [A] 0057 SCK channel 8

Ix100 [A] 0058 Short circuit

Ix100 [A] 0059 Not connected

[°C] 005A Communication

[V] 005B Digital inputs

Bit mask 005C Ready for opera-

Ix100 [A] 005D SCK-C module ID

Ix100 [A]

Ix100 [A]

current 6

current 7

current 8

temp.

voltage

status

current 1

current 2

current 3

current 4

current 5

current 6

current 7

current 8

temp.

voltage

error

tion

Ix100 [A]

Ix100 [A]

Ix100 [A]

[°C]

[V]

Bit mask

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

Ix100 [A]

[°C]

[V]

105608_en_00 PHOENIX CONTACT 87

Solarcheck family

Table A-2 Register contents for the SCK-C-MODBUS

Modbus address (HEX) Designation

0480 SCK-C PD0 (short circuit)

0481 SCK-C PD1 (not connected)

0482 SCK-C PD2 (communication error)

0483 SCK-C PD3 (ready for operation)

0484 SCK-C PD4 (switched off)

0490 SCK-C PD16 (avg. request interval)

0491 SCK-C PD17 (number of packet requests)

0492 Number of packet errors SCK channel 1

0493 Number of packet errors SCK channel 2

0494 Number of packet errors SCK channel 3

0495 Number of packet errors SCK channel 4

0496 Number of packet errors SCK channel 5

0497 Number of packet errors SCK channel 6

0498 Number of packet errors SCK channel 7

0499 Number of packet errors SCK channel 8

04A0 SCK-C PD32 (temperature)

04AE SCK-C PD46 (switch off SCK IF)

04AF SCK-C PD47 (identify module)

04B0 SCK-C PD48 (comp. level)

04B1 SCK-C MI0 (module ID)

04B2 SCK-C MI1 (serial number)

04B3 SCK-C MI2 (serial number)

04B4 SCK-C MI3 (serial number)

04B5 SCK-C MI4 (serial number)

04B6..04C5 SCK-C MI5..MI20 (name, 32 x ASCII)

Table A-3 SCK-M-I-8S-20A register contents

Index Designation Data type Value range Unit

Channel status Bit mask

PD0 Digital input USIGN16 0..1 -

PD1 Current channel 1 INT16 -250..2500 A/100

PD2 Current channel 2 -250..2500 A/100

PD3 Current channel 3 -250..2500 A/100

PD4 Current channel 4 -250..2500 A/100

PD5 Current channel 5 -250..2500 A/100

PD6 Current channel 6 -250..2500 A/100

PD7 Current channel 7 -250..2500 A/100

PD8 Current channel 8 -250..2500 A/100

PD9 Temperature -50..100 °C

PD10 Voltage -2000..12000 mV

PD11…PD47 Unused

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PHOENIX CONTACT 105608_en_00

Register tables

Table A-3 SCK-M-I-8S-20A register contents [...]

Index Designation Data type Value range Unit

MI0 Module ID USIGN16 4 -

MI1 Serial number USIGN64 0 -

MI2 0 -

MI3 0 -

MI4 0 -

MI5 Module name (32

MI6 “K-” -

MI7 “M-” -

MI8 “I-” -

MI9 “8S” -

MI10 “-2” -

MI11 “0A” -

MI12 0 -

MI13 0 -

MI14 0 -

MI15 0 -

MI16 0 -

MI17 0 -

MI18 0 -

MI19 0 -

MI20 0 -

characters)

32x CHAR “SC” -

Table A-4 SCK-M-I-4S-20A register contents

Index Designation Data type Value range Unit

Channel status Bit mask

PD0 Digital input USIGN16 0..1 -

PD1 Current channel 1 INT16 -250..2500 A/100

PD2 Current channel 2 -250..2500 A/100

PD3 Current channel 3 -250..2500 A/100

PD4 Current channel 4 -250..2500 A/100

PD5 Temperature -50..100 °C

PD6…PD47 Unused

MI0 Module ID USIGN16 5 -

MI1 Serial number USIGN64 0 -

MI2 0 -

MI3 0 -

MI4 0 -

105608_en_00 PHOENIX CONTACT 89

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Table A-4 SCK-M-I-4S-20A register contents [...]

Index Designation Data type Value range Unit

MI5 Module name (32 charac-

MI6 “K-” -

MI7 “M-” -

MI8 “I-” -

MI9 “4S” -

MI10 “-2” -

MI11 “0A” -

MI12 0 -

MI13 0 -

MI14 0 -

MI15 0 -

MI16 0 -

MI17 0 -

MI18 0 -

MI19 0 -

MI20 0 -

ters)

32x CHAR “SC” -

90

PHOENIX CONTACT 105608_en_00

Register tables

A 1.2 Address area range 1

Table A-5 Register entries for connecting current measuring module 2901672

(Modbus address 0000h..005Fh)

Modbus address (HEX)

0000 Read-only SCK channel 1 status 0030 Read-only SCK channel 5 current 4

0001 Read-only SCK channel 1 current 1 0031 Read-only SCK channel 5 current 5

0002 Read-only SCK channel 1 current 2 0032 Read-only SCK channel 5 current 6

0003 Read-only SCK channel 1 current 3 0033 Read-only SCK channel 5 current 7

0004 Read-only SCK channel 1 current 4 0034 Read-only SCK channel 5 current 8

0005 Read-only SCK channel 1 current 5 0035 Read-only SCK channel 5 tempera-

0006 Read-only SCK channel 1 current 6 0036 Read-only SCK channel 5 voltage

0007 Read-only SCK channel 1 current 7 0037 Read-only SCK channel 6 status

0008 Read-only SCK channel 1 current 8 0038 Read-only SCK channel 6 current 1

0009 Read-only SCK channel 1 tempera-

000A Read-only SCK channel 1 voltage 003A Read-only SCK channel 6 current 3

000B Read-only SCK channel 2 status 003B Read-only SCK channel 6 current 4

000C Read-only SCK channel 2 current 1 003C Read-only SCK channel 6 current 5

000D Read-only SCK channel 2 current 2 003D Read-only SCK channel 6 current 6

000E Read-only SCK channel 2 current 3 003E Read-only SCK channel 6 current 7

000F Read-only SCK channel 2 current 4 003F Read-only SCK channel 6 current 8

0010 Read-only SCK channel 2 current 5 0040 Read-only SCK channel 6 tempera-

0011 Read-only SCK channel 2 current 6 0041 Read-only SCK channel 6 voltage

0012 Read-only SCK channel 2 current 7 0042 Read-only SCK channel 7 status

0013 Read-only SCK channel 2 current 8 0043 Read-only SCK channel 7 current 1

0014 Read-only SCK channel 2 tempera-

0015 Read-only SCK channel 2 voltage 0045 Read-only SCK channel 7 current 3

0016 Read-only SCK channel 3 status 0046 Read-only SCK channel 7 current 4

0017 Read-only SCK channel 3 current 1 0047 Read-only SCK channel 7 current 5

0018 Read-only SCK channel 3 current 2 0048 Read-only SCK channel 7 current 6

0019 Read-only SCK channel 3 current 3 0049 Read-only SCK channel 7 current 7

001A Read-only SCK channel 3 current 4 004A Read-only SCK channel 7 current 8

001B Read-only SCK channel 3 current 5 004B Read-only SCK channel 7 tempera-

001C Read-only SCK channel 3 current 6 004C Read-only SCK channel 7 voltage

001D Read-only SCK channel 3 current 7 004D Read-only SCK channel 8 status

001E Read-only SCK channel 3 current 8 004E Read-only SCK channel 8 current 1

001F Read-only SCK channel 3 tempera-

0020 Read-only SCK channel 3 voltage 0050 Read-only SCK channel 8 current 3

0021 Read-only SCK channel 4 status 0051 Read-only SCK channel 8 current 4

0022 Read-only SCK channel 4 current 1 0052 Read-only SCK channel 8 current 5

0023 Read-only SCK channel 4 current 2 0053 Read-only SCK channel 8 current 6

Access Designation Modbus

address
(HEX)

ture

ture

ture

0039 Read-only SCK channel 6 current 2

0044 Read-only SCK channel 7 current 2

004F Read-only SCK channel 8 current 2

Access Designation

ture

ture

ture

105608_en_00 PHOENIX CONTACT 91

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Table A-5 Register entries for connecting current measuring module 2901672

(Modbus address 0000h..005Fh) [...]

Modbus
address
(HEX)

0024 Read-only SCK channel 4 current 3 0054 Read-only SCK channel 8 current 7

0025 Read-only SCK channel 4 current 4 0055 Read-only SCK channel 8 current 8

0026 Read-only SCK channel 4 current 5 0056 Read-only SCK channel 8 tempera-

0027 Read-only SCK channel 4 current 6 0057 Read-only SCK channel 8 voltage

0028 Read-only SCK channel 4 current 7 0058 Read-only Short circuit

0029 Read-only SCK channel 4 current 8 0059 Read-only Not connected

002A Read-only SCK channel 4 tempera-

002B Read-only SCK channel 4 voltage 005B Read-only Digital inputs

002C Read-only SCK channel 5 status 005C Read-only Ready for operation

002D Read-only SCK channel 5 current 1 005D Read-only SCK-C module ID

002E Read-only SCK channel 5 current 2

002F Read-only SCK channel 5 current 3

Access Designation Modbus

address
(HEX)

005A Read-only Communication error

ture

Access Designation

ture

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PHOENIX CONTACT 105608_en_00

A 1.3 Address area range 2

Table A-6 Range 2: SCK channel 1 (Modbus address 0080h..00E0h)

Register tables

Modbus address (HEX)

0080 Read-only SCK channel 1 status 00B0 Read-only SCK channel 1 PD47

0081 Read-only SCK channel 1 PD0 00B1 Read-only SCK channel 1 MI0

0082 Read-only SCK channel 1 PD1 00B2 Read-only SCK channel 1 MI1

0083 Read-only SCK channel 1 PD2 00B3 Read-only SCK channel 1 MI2

0084 Read-only SCK channel 1 PD3 00B4 Read-only SCK channel 1 MI3

0085 Read-only SCK channel 1 PD4 00B5 Read-only SCK channel 1 MI4

0086 Read-only SCK channel 1 PD5 00B6 Read-only SCK channel 1 MI5

0087 Read-only SCK channel 1 PD6 00B7 Read-only SCK channel 1 MI6

0088 Read-only SCK channel 1 PD7 00B8 Read-only SCK channel 1 MI7

0089 Read-only SCK channel 1 PD8 00B9 Read-only SCK channel 1 MI8

008A Read-only SCK channel 1 PD9 00BA Read-only SCK channel 1 MI9

008B Read-only SCK channel 1 PD10 00BB Read-only SCK channel 1 MI10

008C Read-only SCK channel 1 PD11 00BC Read-only SCK channel 1 MI11

008D Read-only SCK channel 1 PD12 00BD Read-only SCK channel 1 MI12

008E Read-only SCK channel 1 PD13 00BE Read-only SCK channel 1 MI13

008F Read-only SCK channel 1 PD14 00BF Read-only SCK channel 1 MI14

0090 Read-only SCK channel 1 PD15 00C0 Read-only SCK channel 1 MI15

0091 Read-only SCK channel 1 PD16 00C1 Read-only SCK channel 1 MI16

0092 Read-only SCK channel 1 PD17 00C2 Read-only SCK channel 1 MI17

0093 Read-only SCK channel 1 PD18 00C3 Read-only SCK channel 1 MI18

0094 Read-only SCK channel 1 PD19 00C4 Read-only SCK channel 1 MI19

0095 Read-only SCK channel 1 PD20 00C5 Read-only SCK channel 1 MI20

0096 Read-only SCK channel 1 PD21 00C6 Read-only SCK channel 1 MI21

0097 Read-only SCK channel 1 PD22 00C7 Read-only SCK channel 1 MI22

0098 Read-only SCK channel 1 PD23 00C8 Read-only SCK channel 1 MI23

0099 Read-only SCK channel 1 PD24 00C9 Read-only SCK channel 1 MI24

009A Read-only SCK channel 1 PD25 00CA Read-only SCK channel 1 MI25

009B Read-only SCK channel 1 PD26 00CB Read-only SCK channel 1 MI26

009C Read-only SCK channel 1 PD27 00CC Read-only SCK channel 1 MI27

009D Read-only SCK channel 1 PD28 00CD Read-only SCK channel 1 MI28

009E Read-only SCK channel 1 PD29 00CE Read-only SCK channel 1 MI29

009F Read-only SCK channel 1 PD30 00CF Read-only SCK channel 1 MI30

00A0 Read-only SCK channel 1 PD31 00D0 Read-only SCK channel 1 MI31

00A1 Read-only SCK channel 1 PD32 00D1 Read-only SCK channel 1 MI32

00A2 Read-only SCK channel 1 PD33 00D2 Read-only SCK channel 1 MI33

00A3 Read-only SCK channel 1 PD34 00D3 Read-only SCK channel 1 MI34

00A4 Read-only SCK channel 1 PD35 00D4 Read-only SCK channel 1 MI35

00A5 Read-only SCK channel 1 PD36 00D5 Read-only SCK channel 1 MI36

00A6 Read-only SCK channel 1 PD37 00D6 Read-only SCK channel 1 MI37

00A7 Read-only SCK channel 1 PD38 00D7 Read-only SCK channel 1 MI38

Access Designation Modbus

address
(HEX)

Access Designation

105608_en_00 PHOENIX CONTACT 93

Solarcheck family

Table A-6 Range 2: SCK channel 1 (Modbus address 0080h..00E0h) [...]

Modbus
address
(HEX)

00A8 Read-only SCK channel 1 PD39 00D8 Read-only SCK channel 1 MI39

00A9 Read-only SCK channel 1 PD40 00D9 Read-only SCK channel 1 MI40

00AA Read-only SCK channel 1 PD41 00DA Read-only SCK channel 1 MI41

00AB Read-only SCK channel 1 PD42 00DB Read-only SCK channel 1 MI42

00AC Read-only SCK channel 1 PD43 00DC Read-only SCK channel 1 MI43

00AD Read-only SCK channel 1 PD44 00DD Read-only SCK channel 1 MI44

00AE Read-only SCK channel 1 PD45 00DE Read-only SCK channel 1 MI45

00AF Read-only SCK channel 1 PD46 00DF Read-only SCK channel 1 MI46

Access Designation Modbus

address
(HEX)

00E0 Read-only SCK channel 1 MI47

Access Designation

94

PHOENIX CONTACT 105608_en_00

A 1.4 Address area range 3

Table A-7 Range 3: SCK channel 2 (Modbus address 0100h..0160h)

Register tables

Modbus address (HEX)

0100 Read-only SCK channel 2 status 0130 Read-only SCK channel 2 PD47

0101 Read-only SCK channel 2 PD0 0131 Read-only SCK channel 2 MI0

0102 Read-only SCK channel 2 PD1 0132 Read-only SCK channel 2 MI1

0103 Read-only SCK channel 2 PD2 0133 Read-only SCK channel 2 MI2

0104 Read-only SCK channel 2 PD3 0134 Read-only SCK channel 2 MI3

0105 Read-only SCK channel 2 PD4 0135 Read-only SCK channel 2 MI4

0106 Read-only SCK channel 2 PD5 0136 Read-only SCK channel 2 MI5

0107 Read-only SCK channel 2 PD6 0137 Read-only SCK channel 2 MI6

0108 Read-only SCK channel 2 PD7 0138 Read-only SCK channel 2 MI7

0109 Read-only SCK channel 2 PD8 0139 Read-only SCK channel 2 MI8

010A Read-only SCK channel 2 PD9 013A Read-only SCK channel 2 MI9

010B Read-only SCK channel 2 PD10 013B Read-only SCK channel 2 MI10

010C Read-only SCK channel 2 PD11 013C Read-only SCK channel 2 MI11

010D Read-only SCK channel 2 PD12 013D Read-only SCK channel 2 MI12

010E Read-only SCK channel 2 PD13 013E Read-only SCK channel 2 MI13

010F Read-only SCK channel 2 PD14 013F Read-only SCK channel 2 MI14

0110 Read-only SCK channel 2 PD15 0140 Read-only SCK channel 2 MI15

0111 Read-only SCK channel 2 PD16 0141 Read-only SCK channel 2 MI16

0112 Read-only SCK channel 2 PD17 0142 Read-only SCK channel 2 MI17

0113 Read-only SCK channel 2 PD18 0143 Read-only SCK channel 2 MI18

0114 Read-only SCK channel 2 PD19 0144 Read-only SCK channel 2 MI19

0115 Read-only SCK channel 2 PD20 0145 Read-only SCK channel 2 MI20

0116 Read-only SCK channel 2 PD21 0146 Read-only SCK channel 2 MI21

0117 Read-only SCK channel 2 PD22 0147 Read-only SCK channel 2 MI22

0118 Read-only SCK channel 2 PD23 0148 Read-only SCK channel 2 MI23

0119 Read-only SCK channel 2 PD24 0149 Read-only SCK channel 2 MI24

011A Read-only SCK channel 2 PD25 014A Read-only SCK channel 2 MI25

011B Read-only SCK channel 2 PD26 014B Read-only SCK channel 2 MI26

011C Read-only SCK channel 2 PD27 014C Read-only SCK channel 2 MI27

011D Read-only SCK channel 2 PD28 014D Read-only SCK channel 2 MI28

011E Read-only SCK channel 2 PD29 014E Read-only SCK channel 2 MI29

011F Read-only SCK channel 2 PD30 014F Read-only SCK channel 2 MI30

0120 Read-only SCK channel 2 PD31 0150 Read-only SCK channel 2 MI31

0121 Read-only SCK channel 2 PD32 0151 Read-only SCK channel 2 MI32

0122 Read-only SCK channel 2 PD33 0152 Read-only SCK channel 2 MI33

0123 Read-only SCK channel 2 PD34 0153 Read-only SCK channel 2 MI34

0124 Read-only SCK channel 2 PD35 0154 Read-only SCK channel 2 MI35

0125 Read-only SCK channel 2 PD36 0155 Read-only SCK channel 2 MI36

0126 Read-only SCK channel 2 PD37 0156 Read-only SCK channel 2 MI37

0127 Read-only SCK channel 2 PD38 0157 Read-only SCK channel 2 MI38

Access Designation Modbus

address
(HEX)

Access Designation

105608_en_00 PHOENIX CONTACT 95

Solarcheck family

Table A-7 Range 3: SCK channel 2 (Modbus address 0100h..0160h) [...]

Modbus
address
(HEX)

0128 Read-only SCK channel 2 PD39 0158 Read-only SCK channel 2 MI39

0129 Read-only SCK channel 2 PD40 0159 Read-only SCK channel 2 MI40

012A Read-only SCK channel 2 PD41 015A Read-only SCK channel 2 MI41

012B Read-only SCK channel 2 PD42 015B Read-only SCK channel 2 MI42

012C Read-only SCK channel 2 PD43 015C Read-only SCK channel 2 MI43

012D Read-only SCK channel 2 PD44 015D Read-only SCK channel 2 MI44

012E Read-only SCK channel 2 PD45 015E Read-only SCK channel 2 MI45

012F Read-only SCK channel 2 PD46 015F Read-only SCK channel 2 MI46

Access Designation Modbus

address
(HEX)

0160 Read-only SCK channel 2 MI47

Access Designation

96

PHOENIX CONTACT 105608_en_00

A 1.5 Address area range 4

Table A-8 Range 4: SCK channel 3 (Modbus address 0180h..01E0h)

Register tables

Modbus address (HEX)

0180 Read-only SCK channel 3 status 01B0 Read-only SCK channel 3 PD47

0181 Read-only SCK channel 3 PD0 01B1 Read-only SCK channel 3 MI0

0182 Read-only SCK channel 3 PD1 01B2 Read-only SCK channel 3 MI1

0183 Read-only SCK channel 3 PD2 01B3 Read-only SCK channel 3 MI2

0184 Read-only SCK channel 3 PD3 01B4 Read-only SCK channel 3 MI3

0185 Read-only SCK channel 3 PD4 01B5 Read-only SCK channel 3 MI4

0186 Read-only SCK channel 3 PD5 01B6 Read-only SCK channel 3 MI5

0187 Read-only SCK channel 3 PD6 01B7 Read-only SCK channel 3 MI6

0188 Read-only SCK channel 3 PD7 01B8 Read-only SCK channel 3 MI7

0189 Read-only SCK channel 3 PD8 01B9 Read-only SCK channel 3 MI8

018A Read-only SCK channel 3 PD9 01BA Read-only SCK channel 3 MI9

018B Read-only SCK channel 3 PD10 01BB Read-only SCK channel 3 MI10

018C Read-only SCK channel 3 PD11 01BC Read-only SCK channel 3 MI11

018D Read-only SCK channel 3 PD12 01BD Read-only SCK channel 3 MI12

018E Read-only SCK channel 3 PD13 01BE Read-only SCK channel 3 MI13

018F Read-only SCK channel 3 PD14 01BF Read-only SCK channel 3 MI14

0190 Read-only SCK channel 3 PD15 01C0 Read-only SCK channel 3 MI15

0191 Read-only SCK channel 3 PD16 01C1 Read-only SCK channel 3 MI16

0192 Read-only SCK channel 3 PD17 01C2 Read-only SCK channel 3 MI17

0193 Read-only SCK channel 3 PD18 01C3 Read-only SCK channel 3 MI18

0194 Read-only SCK channel 3 PD19 01C4 Read-only SCK channel 3 MI19

0195 Read-only SCK channel 3 PD20 01C5 Read-only SCK channel 3 MI20

0196 Read-only SCK channel 3 PD21 01C6 Read-only SCK channel 3 MI21

0197 Read-only SCK channel 3 PD22 01C7 Read-only SCK channel 3 MI22

0198 Read-only SCK channel 3 PD23 01C8 Read-only SCK channel 3 MI23

0199 Read-only SCK channel 3 PD24 01C9 Read-only SCK channel 3 MI24

019A Read-only SCK channel 3 PD25 01CA Read-only SCK channel 3 MI25

019B Read-only SCK channel 3 PD26 01CB Read-only SCK channel 3 MI26

019C Read-only SCK channel 3 PD27 01CC Read-only SCK channel 3 MI27

019D Read-only SCK channel 3 PD28 01CD Read-only SCK channel 3 MI28

019E Read-only SCK channel 3 PD29 01CE Read-only SCK channel 3 MI29

019F Read-only SCK channel 3 PD30 01CF Read-only SCK channel 3 MI30

01A0 Read-only SCK channel 3 PD31 01D0 Read-only SCK channel 3 MI31

01A1 Read-only SCK channel 3 PD32 01D1 Read-only SCK channel 3 MI32

01A2 Read-only SCK channel 3 PD33 01D2 Read-only SCK channel 3 MI33

01A3 Read-only SCK channel 3 PD34 01D3 Read-only SCK channel 3 MI34

01A4 Read-only SCK channel 3 PD35 01D4 Read-only SCK channel 3 MI35

01A5 Read-only SCK channel 3 PD36 01D5 Read-only SCK channel 3 MI36

01A6 Read-only SCK channel 3 PD37 01D6 Read-only SCK channel 3 MI37

01A7 Read-only SCK channel 3 PD38 01D7 Read-only SCK channel 3 MI38

Access Designation Modbus

address
(HEX)

Access Designation

105608_en_00 PHOENIX CONTACT 97

Solarcheck family

Table A-8 Range 4: SCK channel 3 (Modbus address 0180h..01E0h) [...]

Modbus
address
(HEX)

01A8 Read-only SCK channel 3 PD39 01D8 Read-only SCK channel 3 MI39

01A9 Read-only SCK channel 3 PD40 01D9 Read-only SCK channel 3 MI40

01AA Read-only SCK channel 3 PD41 01DA Read-only SCK channel 3 MI41

01AB Read-only SCK channel 3 PD42 01DB Read-only SCK channel 3 MI42

01AC Read-only SCK channel 3 PD43 01DC Read-only SCK channel 3 MI43

01AD Read-only SCK channel 3 PD44 01DD Read-only SCK channel 3 MI44

01AE Read-only SCK channel 3 PD45 01DE Read-only SCK channel 3 MI45

01AF Read-only SCK channel 3 PD46 01DF Read-only SCK channel 3 MI46

Access Designation Modbus

address
(HEX)

01E0 Read-only SCK channel 3 MI47

Access Designation

98

PHOENIX CONTACT 105608_en_00

A 1.6 Address area range 5

Table A-9 Range 5: SCK channel 4 (Modbus address 0200h..0260h)

Register tables

Modbus address (HEX)

0200 Read-only SCK channel 4 status 0230 Read-only SCK channel 4 PD47

0201 Read-only SCK channel 4 PD0 0231 Read-only SCK channel 4 MI0

0202 Read-only SCK channel 4 PD1 0232 Read-only SCK channel 4 MI1

0203 Read-only SCK channel 4 PD2 0233 Read-only SCK channel 4 MI2

0204 Read-only SCK channel 4 PD3 0234 Read-only SCK channel 4 MI3

0205 Read-only SCK channel 4 PD4 0235 Read-only SCK channel 4 MI4

0206 Read-only SCK channel 4 PD5 0236 Read-only SCK channel 4 MI5

0207 Read-only SCK channel 4 PD6 0237 Read-only SCK channel 4 MI6

0208 Read-only SCK channel 4 PD7 0238 Read-only SCK channel 4 MI7

0209 Read-only SCK channel 4 PD8 0239 Read-only SCK channel 4 MI8

020A Read-only SCK channel 4 PD9 023A Read-only SCK channel 4 MI9

020B Read-only SCK channel 4 PD10 023B Read-only SCK channel 4 MI10

020C Read-only SCK channel 4 PD11 023C Read-only SCK channel 4 MI11

020D Read-only SCK channel 4 PD12 023D Read-only SCK channel 4 MI12

020E Read-only SCK channel 4 PD13 023E Read-only SCK channel 4 MI13

020F Read-only SCK channel 4 PD14 023F Read-only SCK channel 4 MI14

0210 Read-only SCK channel 4 PD15 0240 Read-only SCK channel 4 MI15

0211 Read-only SCK channel 4 PD16 0241 Read-only SCK channel 4 MI16

0212 Read-only SCK channel 4 PD17 0242 Read-only SCK channel 4 MI17

0213 Read-only SCK channel 4 PD18 0243 Read-only SCK channel 4 MI18

0214 Read-only SCK channel 4 PD19 0244 Read-only SCK channel 4 MI19

0215 Read-only SCK channel 4 PD20 0245 Read-only SCK channel 4 MI20

0216 Read-only SCK channel 4 PD21 0246 Read-only SCK channel 4 MI21

0217 Read-only SCK channel 4 PD22 0247 Read-only SCK channel 4 MI22

0218 Read-only SCK channel 4 PD23 0248 Read-only SCK channel 4 MI23

0219 Read-only SCK channel 4 PD24 0249 Read-only SCK channel 4 MI24

021A Read-only SCK channel 4 PD25 024A Read-only SCK channel 4 MI25

021B Read-only SCK channel 4 PD26 024B Read-only SCK channel 4 MI26

021C Read-only SCK channel 4 PD27 024C Read-only SCK channel 4 MI27

021D Read-only SCK channel 4 PD28 024D Read-only SCK channel 4 MI28

021E Read-only SCK channel 4 PD29 024E Read-only SCK channel 4 MI29

021F Read-only SCK channel 4 PD30 024F Read-only SCK channel 4 MI30

0220 Read-only SCK channel 4 PD31 0250 Read-only SCK channel 4 MI31

0221 Read-only SCK channel 4 PD32 0251 Read-only SCK channel 4 MI32

0222 Read-only SCK channel 4 PD33 0252 Read-only SCK channel 4 MI33

0223 Read-only SCK channel 4 PD34 0253 Read-only SCK channel 4 MI34

0224 Read-only SCK channel 4 PD35 0254 Read-only SCK channel 4 MI35

0225 Read-only SCK channel 4 PD36 0255 Read-only SCK channel 4 MI36

0226 Read-only SCK channel 4 PD37 0256 Read-only SCK channel 4 MI37

0227 Read-only SCK channel 4 PD38 0257 Read-only SCK channel 4 MI38

Access Designation Modbus

address
(HEX)

Access Designation

105608_en_00 PHOENIX CONTACT 99

Solarcheck family

Table A-9 Range 5: SCK channel 4 (Modbus address 0200h..0260h) [...]

Modbus
address
(HEX)

0228 Read-only SCK channel 4 PD39 0258 Read-only SCK channel 4 MI39

0229 Read-only SCK channel 4 PD40 0259 Read-only SCK channel 4 MI40

022A Read-only SCK channel 4 PD41 025A Read-only SCK channel 4 MI41

022B Read-only SCK channel 4 PD42 025B Read-only SCK channel 4 MI42

022C Read-only SCK channel 4 PD43 025C Read-only SCK channel 4 MI43

022D Read-only SCK channel 4 PD44 025D Read-only SCK channel 4 MI44

022E Read-only SCK channel 4 PD45 025E Read-only SCK channel 4 MI45

022F Read-only SCK channel 4 PD46 025F Read-only SCK channel 4 MI46

Access Designation Modbus

address
(HEX)

0260 Read-only SCK channel 4 MI47

Access Designation

100

PHOENIX CONTACT 105608_en_00