Modularizable plug connector module for a heavy-duty industrial plug connector

A method for producing a connector module for a modular industrial connector having a holding frame that is configured to receive and support the connector module along with one or more other connector modules, the method comprising:

• assembling at least two independent functional units of different form together in an assembled state, wherein the functional units enclose a cavity with each other when in the assembled state to receive a fixing device to hold the functional units together in the assembled state apart from the holding frame, wherein at least one of the independent functional units includes one or more contact element openings for receiving a respective contact element, wherein the connector module is configured to couple to an opposing mating connector module in a mating direction aligned parallel with the one or more contact element openings, and wherein the functional units in the assembled state combine to form the connector module with protruding lugs on opposing lateral sides of the connector module to engage with corresponding recesses of the holding frame of the modular industrial connector;
• and
• thereafter, at least partially filling the cavity with a fixing device, whereby the functional units are fixed to each other in the assembled state.