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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