Danfoss MCX15B2, MCX20B2 Installation guide

Installation Guide

Electronic controller

080R9340

MCX15B2/20B2

General features:

MCX15B2/MCX20B2 is an electronic controller that stands on the top of the MCX range, thanks to the large number of its inputs and outputs, the enhanced CPU capabilities and connectivity features. It holds all the typical functionalities of MCX controllers: programmability, connection to the CANbus local network, up to two Modbus RS485 serial interfaces with galvanic isolation.

Furthermore, it is ﬁtted with an ultra wide range (24/110/230 V AC) power supply in the same product variant, with USB and Ethernet connection for embedded Web server and IP protocols management. It is available in several models, with or without graphic LCD display and with 15 or 20 digital output.

MC X15B2 MCX20B2

ANALOG INPUTS

NTC, 0/1 V, 0/5 V, 0 / 10 V PT1000, selectable via software 4 6 Universal NTC, Pt1000, 0/1 V, 0/5 V, 0/10 V, ON/OFF, 0/20 mA, 4/20 mA, selectable via

software

Total number 10 16

DIGITAL INPUTS

Voltage free contact/24V AC sensing 18 18 24/230 V AC optoinsulated 4 4

Total number 22 22

ANALOG OUTPUTS

0/10 V DC optoinsulated 6 6 0/10 V, PWM, PPM selectable via software 2 2

Total number 6 6

DIGITAL OUTPUTS

SPDT relay 16 A (changeover contacts) 2 2 SPST relay 5 A (normally open contacts) 13 18

Total number 15 20

OTHERS

Power supply 24-110-230 V AC / 40-230 V DC • • Connection for programming key and for remote display and keyboard • • Buzzer - RTC clock • • Modbus RS485 serial interface x1 x2 CANbus • • Ethernet for Webserver/Modbus TCP • • USB for ﬁrmware/application software update and datalogging • • Dimensions (DIN modules) 16 16 Mounting DIN rail DIN rail

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General features and warnings

Plastic housing features

• DIN rail mounting complying with EN 60715

• Self extinguishing V0 according to IEC 60695-11-10 and glowing/hot wire test at 960 °C according to IEC 60695-2-12

• Ball test: 125 °C according to IEC 60730-1. Leakage current: ≥ 250 V according to IEC 60112

Other features

• Operating conditions CE: -20T60 / UL: 0T50, 90% RH non-condensing

• Storage conditions: -30T80, 90% RH non-condensing

• To be integrated in Class I and/or II appliances

• Index of protection: IP40 only on the front cover

• Period of electric stress across insulating parts: long

• Suitable for use in environments with degree of pollution 2

• Category of resistance to heat and ﬁre: D

• Immunity against voltage surges: category II, category III for versions without display

• Software class and structure: class A

Compliance

CE mark This product is designed to comply with the following EU standards:

• Low voltage directive LVD 2014/35/EU: – EN60730-1: 2011 (Automatic electrical control for household and similar use. General requirements) – EN60730-2-9: 2010 (Particular Requirements for Temperature Sensing Controls)

• Electromagnetic compatibility EMC directive 2014/30/EU: – EN 61000-6-3: 2007 +A1: 2011 (Emission standard for residential, commercial and light-industrial environments) – EN 61000-6-2: 2005 (Immunity for industrial environments)

• RoHS directive 2011/65/EU and 2015/863/EU: – EN50581: 2012

UL approval:

• UL ﬁle E31024

General warnings

• Every use that is not described in this manual is considered incorrect and is not authorised by the manufacturer

• Verify that the installation and operating conditions of the device respect the ones speciﬁed in the manual, specially concerning the

supply voltage and environmental conditions

• This device contains live electrical components therefore all the service and maintenance operations must be performed by qualiﬁed

personnel

• The device can’t be used as a safety device

• Liability for injury or damage caused by the incorrect use of the device lies solely with the user

Installation warnings

• Mounting position recommended: vertical

• The installation must be executed according the local standards and legislations of the country

• Always operate on the electrical connections with the device disconnected from the main power supply

• Before carrying out any maintenance operations on the device, disconnect all the electrical connections

• For safety reasons the appliance must be ﬁtted inside an electrical panel with no live parts accessible

• Don’t expose the device to continuous water sprays or to relative humidity greater than 90%.

Avoid exposure to corrosive or pollutant gases, natural elements, environments where explosives or mixes of ﬂammable gases are present, dust, strong vibrations or shock, large and rapid ﬂuctuations in ambient temperature that in combination with high humidity can condensate, strong magnetic and/or radio interference (e.g. transmitting antennae)

• When connecting loads beware of the maximum current for each relay and connector

• Use cable ends suitable for the corresponding connectors. After tightening the screws of connectors, slightly tug the cables to check

their tightness

• Use appropriate data communication cables. Refer to the Installation Guide “MCX hardware network speciﬁcation” for the kind of cable

to be used and setup recommendations

• Reduce the path of the probe and digital inputs cables as much as possible, and avoid spiral paths enclosing power devices. Separate

from inductive loads and power cables to avoid possible electromagnetic noises

• Avoid touching or nearly touching the electronic components ﬁtted on the board to avoid electrostatic discharges

• The product is not suitable to be exposed directly to the Internet

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Technical speciﬁcations

Power supply

• 21 – 265 V AC, 50/60 Hz. Maximum power consumption: 15 W. Insulation between power supply and the extra-low voltage: reinforced

• 40 – 230 V DC

I/O TYPE NUM SPECIFICATIONS Analog

inputs

Digital inputs

NTC 0 / 1 V 0 / 5 V 0 / 10 V PT1000

ON/OFF 0 / 20 mA 4 / 20 mA

Auxiliary Supplies 15 V+ and 5 V+

16 (MCX20B2) 10 (MCX15B2)

10 (MCX20B2)

6 (MCX15B2)

Total number: 16 on MCX20B2; 10 on MCX15B2

Analog Input type selectable via software Max 13.5 V input voltage Do not connect voltage sources without current limitation (overall 80 mA)

to analog inputs while unit is not powered Open circuit HW diagnostics available for all analog inputs

AI1 to AI16 on MCX20B2 AI1 to AI10 on MCX15B2

NTC, default 10 kΩ at 25 °C, Beta 3435 0/xV type: impedance is greater than 1 MΩ

AI1 to AI6, AI11 to AI14 on MCX20B2 AI1 to AI6 on MCX15B2

100 Ωs as measuring resistance for current measurements. The inputs can be used to sense voltage free contacts with contact cleaning current 10 mA

5 V+ max: 200 mA (total on all outputs) 15 V+ max: 200 mA (total on all outputs) All power outputs are protected against short circuit and have an automatic recovery from overload condition.

Total number: 22

Digital Input type selectable via software between 24 V AC or voltage free

Analog outputs

Voltage free contacts or 24 V AC

24 V opto-insulated 4 DI1, DI2, DI3, DI4

230 V opto-insulated 4 DIH1, DIH2, DIH3, DIH4

0 / 10 V 6 AO1, AO2, AO3, AO4, AO5, AO6

PWM-PPM 2 AO5, AO6

18 DI5 to DI22

As the inputs are not isolated, caution has to be used when applying 24 V AC: the same polarity of the supply MUST always be used on COM/GND connection. Counting function with max frequency of 16.6 Hz (30 ms minimum pulse time)

Inputs opto isolated, 24 V AC 50/60 Hz or 24 V DC Rated current: 5 mA @24 V AC

Inputs opto isolated, 86 – 265 V AC / 50/60 Hz Reinforced isolation Rated current: 2,5 mA @ 265 V AC

Note: when the 230 V AC DH1 input is used, the corresponding 24 V DI1 input is not available anymore; the same for the couple of inputs DIH2 and DI2, DIH3 and DI3, DIH4 and DI4

Total number: 6

Analog Outputs 0/10 V, galvanically isolated, minimum load 1K Ω (10 mA) for each output

Asynchronous PWM

Voltage output: max VLO= 0.6 V, min VHI= 6.5 V Frequency range 15Hz…1kHz

Synchronous PWM and PPM

Voltage output: max VLO= 0.6 V, min VHI= 6.5 V Frequency: Mains frequency x2

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Digital output

Communication interface

Interface Use Connector label Technical data

CANbus Fieldbus for connection to user

USB device Prepared for future use USB-DEV Plug: Type Mini B USB host For connection to Flash drive

RS485-1 RS485-2 (MCX20B2 only)

Ethernet For web server functionality,

Relay 20 (MCX20B2)

15 (MCX15B2)

interfaces, MCX controllers, service tools etc.

for application software update, datalogging and service

Communication bus to BMS (e.g. Modbus slave), service tools, smart devices (e.g. Modbus master) RS485-1 can be polarized as master from the application

integration (e.g. Modbus TCP) NOTICE! Do not route cable outside of buildings. Connect only to IT equipment compliant with EN 60950 or EN 62368 (Information technology equipment. Safety. General requirements)

Concerning the insulation distance there are three groups of relays:

• group 1: relays 1 to 8

• group 2: relays 9 to 13

• group 3: relays 14 to 20 Insulation between relays of the same group: functional Insulation between relays of diﬀerent groups: reinforced Insulation between relays and the extra-low voltage parts: reinforced Total current load limit: 65 A

C1-NO1 to C13-NO13, C16-NO16 to C20-NO20 on MCX20B2 C1-NO1 to C13-NO13 on MCX15B2

Normally open contact relays 5 A Characteristics of each relay:

– 5 A 250 V AC for resistive loads - 100,000 cycles – 3 A 250 V AC for inductive loads - 100,000 cycles with cos(phi) = 0.4 – UL: 3 A resistive, 250 V AC, 100,000 cycles; 1/8 hp, 125/250 V AC,

30,000 cycles; C300 pilot duty, 125/250 V AC, 30,000 cycles

C14-NO14-NC14, C15-NO15-NC15

Changeover contact relays 16 A Characteristics of each relay:

– 7 A 250 V AC for resistive loads - 100,000 cycles – 3.5 A 250 V AC for inductive loads - 230,000 cycles with cos(phi) = 0.4 – UL: NO contact: 6 A resistive, 240 V AC, 30.000 cycles; 1/2 hp, 240

V AC, 30.000 cycles; 470 VA pilot duty, 240 V AC, 30.000 cycles. NC contact: 6 A resistive, 6.000 cycles

C3 NO3 to C6 NO6

Optionally they can be solid state relays Characteristics of each relay: 15-280 Vrms, 0.5 A UL: 0.5 A resistive, 240 V AC, 30,000 cycles

CAN CAN-RJ

USB-H Plug: Type A

RS485-1 RS485-2

ETHERNET Interface type: 10 BASE-T and 100 BASE-TX, IEEE

Physical layer according to ISO 11898-2 High Speed CAN bus Frame format according to CAN 2.0B speciﬁcation Transceiver not isolated (power supply has reinforced isolation)

Physical layer according to EIA 485 Ref3 Provide 500 V peak transient galvanic isolation

802.3. MDI-X (Automatic medium-dependent interface crossover)

Wire lengths

Interface Max wire length (m) Max. baudrate (bps) Min. wire size

Ethernet 100 10/100 M CANbus 1000

500 250 80

30 RS485 1000 125 K AWG22 Signal wiring 30

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50 K 125 K 250 K 500 K 1 M

AWG18 AWG22 AWG24 AWG26 AWG26

Connection diagram

TOP BOARD

MCX20B2 only

BOTTOM BOARD

230 V or 24 V DIGITAL INPUT

(DI1 - DI4)

VOLTAGE FREE or 24 V DIGITAL INPUT

(DI5 - DI22)

24 V230 VOR OR

24 V SELV

e.g. DIGITAL INPUT 5e.g. DIGITAL INPUT 1

24 VVOLTAGE FREE

24 V SELV

*) NOTE: connection has to be made on the ﬁrst and last local network units, make the connection as close as possible to the connector

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