BLEMO - Logo
BLEMO - Logo

PLC control
M173

The most important advantages:
  • Approved for A2L/A3 refrigerant
  • Integrated overheating control
  • License-free software
M173 – PLC controllers

M173: PLC control

for HVAC solutions and pump controls

The M173 is the slim, cost-effective solution for smaller automation projects. Intuitive operation via a 7-segment display and capacitive buttons, reduced inputs/outputs, and communication interfaces make it particularly easy to use. Certified according to EN 60335-2-40, it supports sustainable applications with natural, flammable refrigerants such as heat pumps – ideal for future-oriented projects.
product inquiry

The advantages

PLC control M173

  • Simple, efficient and secure integration into building management systems (BMS) or connectivity with cloud applications and remote maintenance solutions.
  • A wide range of communication interfaces and protocols.
  • Reduce time to market thanks to the intuitive EcoStruxure™ Machine Expert - HVAC programming software.
  • Improved energy efficiency thanks to integrated advanced algorithms.
  • Meeting the demand for the development of simple and compact, through to large and networked machines.
  • Availability of a variety of I/O extensions, displays, wall thermostats, sensors for e.g. temperature and humidity.

Areas of application

Heizungsanlage
Heating system
Wäremerückgewinnungsgeräte
Heat recovery devices
Chiller
Chiller
Prozess- und Industriekühler
Process and industrial coolers
RTL Lufttechnik
RTL Air Technology
Pump applications
Heizungstechnik
Heating technology
Kompakte Maschinen
Compact machines

Product information

The M173 series is ideal for simple and compact machines, including flush mounting. Whether HVAC systems, pumps, or other applications, these powerful controllers offer high flexibility, excellent connectivity, and quick installation.

A versatile system that combines efficiency and convenience.
The M173 controllers can be easily connected to the most common building management systems and offer predefined functions for energy-efficient machines.

Green Premium Product:
  • Sustainable performance through design compliance with environmental regulations.
Small dimensions:
  • 4-DIN module in three versions. 1 MB to support simple and complex programs.
Less is more:
  • Insulated everywhere, which simplifies the machine’s circuit diagram and reduces the number of components
Adaptive:
  • One unit for super-compact machines; for larger models, simply add I/O extensions.
Several connection options:
  • to the other devices within the machine Modbus RTU client and server, CANopen, USB-C, remote display bus.
Flexible and configurable:
  • 22 IOs for adaptation to different machines
      • – Inputs: NTC, PT1000, 0…5V, 0…10V, 4…20mA, voltage-free, pulse counter
      – Outputs: Relay, SSR, PWM, 0…10V, 4…20mA.
Integrated EEVD:
  • Integrated unipolar electronic expansion valve driver.
Ready-to-use assets:
  • Simplification of programming according to IEC61131. Many templates, libraries and function blocks available.
IoT on deck:
  • Simple connection to the secure interface: cyber-secure IoT module.
  • M173, Optimized with display, 22 I/O, 2 solid state relays (SSR), 2 RS485, 1 CAN, 24 VAC/DC
  • M173, Optimized with display, 22 I/O, 2 RS485, 1 CAN, 24 VAC/DC
  • M173, Optimized without display, 22 I/O, 2 CAN, 24 VAC/DC

Everything you need is embedded in the M173

  • IIoT edge unit
  • Remote displays
  • Extension modules
  • Communication modules
  • Large selection of humidity and temperature sensors

The high level of flexibility makes it very easy to install additional modules and still keep everything in just one configuration.

Networked everywhere:

  • Modbus RTU
  • CAN extension bus
  • LAN extension bus


Flexible and scalable:

Any existing M173 controller can be upgraded later (as can the M172), as they are all programmed using the same EcoStruxure Machine Expert HVAC software.

M173 Optimized logic controllers: from 22 I/O (stand-alone) to 78 I/O (with expansion modules)

  • Programming software:
    EcoStruxure Machine Expert – HVAC V1.6 or higher.
  • Secure communication on the Internet:
    – with TM172SIG Gateway Secure Interface
    – with TM172SIP Plug-in Secure Interface
  • Maximum number of I/O with expansion modules:
    78
  • Power supply:
    24 V
  • Embedded I/Os:
    – Analog Input 7
    – Digital Input 6
    – Analog Output 4
    – Digital Output 5
product inquiry

Product inquiry

Downloads M173

German

English

French

adjustment service
Control cabinet construction
Cybersecurity
Retrofit
Service assignments

Our service world

The focus is always on people. Not machines.

Efficient, perfectly functioning technology is the basis of everything. However, it is advice, proximity, and service that make the decisive difference. That is why we focus on personal contact, clear coordination, and support that really helps in everyday life.
About our services
adjustment service
Control cabinet construction
Cybersecurity
Retrofit
Service assignments

Your personal contact person

The focus is always on people. Not machines.

B.Eng. Marc Scherer
Managing Director
Back to the overview