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Danfoss MCX15B2

Danfoss MCX15B2
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Installation Guide
Electronic controller
MCX15B2/20B2
080R9340
AN320819413085en-000401
© Danfoss | DCS (vt) | 2020.10
AN320819413085en-000401 | 1
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.
MCX15B2 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
6 10
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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Danfoss MCX15B2 Specifications

General IconGeneral
TypeController
Power Supply24V AC/DC
Digital Inputs6
Analog Inputs2
Relay Outputs2
Analog Outputs1
CommunicationRS485
ProtocolModbus RTU
Enclosure RatingIP20
Protection ClassII
Housing MaterialPlastic
Operating Temperature-20 to +60 °C

Summary

Installation Guide

General Features Overview

Overview of the MCX15B2/MCX20B2 controller's capabilities, connectivity, and variants.

Product Features and Safety

Housing, Operating and Compliance Details

Details on plastic housing features, operating conditions, compliance standards (CE, UL), and warnings.

Installation and Operational Safety

Key safety instructions for mounting, electrical connections, handling, and general operational precautions.

Technical Specifications

Power Supply and InputOutput Details

Specifications for power supply, analog inputs, digital inputs, and analog outputs.

Digital Output and Communication Interfaces

Specifications for digital output relays, communication interfaces (CAN, RS485, Ethernet), and wire lengths.

Connection Diagrams

Top and Bottom Board Wiring

Visual guide illustrating connection points for the controller's top and bottom boards.

Connector and Interface Specifications

Top and Bottom Board Connectors

Listing of connectors for top and bottom boards with their types and dimensions.

Dimensions and User Interface

Physical Dimensions and UI Elements

Physical dimensions of the controller and details on the LCD display and keyboard.

Product and Accessory Part Numbers

Lists of product part numbers and available accessory kits for the controller.

Model Replacement Guide

MCX15 B-20 B to MCX15 B2-20 B2 Upgrade

Instructions and considerations for replacing older MCX models with the MCX15B2/20B2.

Wiring Diagrams for Model Replacement

MCX20 B to MCX20 B2 Digital IO Wiring

Detailed connection diagrams for digital outputs and inputs when upgrading from MCX20B to MCX20B2.

MCX20 B to MCX20 B2 Analog IO Wiring

Wiring diagrams for analog inputs and outputs for MCX20B to MCX20B2 upgrades.

MCX15 B to MCX15 B2 Digital IO Wiring

Detailed connection diagrams for digital outputs and inputs when upgrading from MCX15B to MCX15B2.

MCX15 B to MCX15 B2 Analog IO Wiring

Wiring diagrams for analog inputs and outputs for MCX15B to MCX15B2 upgrades.

External Relay Connection

NC Signal Relay Wiring Diagram

Diagram for external relay connection when NC signals are required for specific outputs.

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