Trailer control module with tractor protection function

An electropneumatic trailer control module (100;

• 300;
• 500) for a pneumatic brake system, the electropneumatic trailer control module (100;
• 300;
• 500) comprising:
• a housing structure (100a;
• 300a;
• 500a);
• a manual brake pressure port (154) that receives a driver's brake demand pressure component;
• an electropneumatic brake pressure port (144;
• 146) that receives an electropneumatic brake pressure component from at least one independent pressure source (138;
• 140);
• a relay valve (112) comprising a control port (110), a supply port (114), an outlet port (116), and a relief port (118),
• wherein the control port (110) receives at least one of the driver's brake demand pressure either directly or indirectly from the manual brake pressure port (154) or the electropneumatic brake pressure from the electropneumatic brake pressure port (144;
• 146) and enables a fluid connection between the supply port (114) and the outlet port (116) in an activated state, wherein the relay valve (112) connects the outlet port (116) to the relief port (118) when the relay valve (112) is in an inactivated state or when there is no control pressure at the control port (110), and
• a spring-supported electropneumatic input valve (104) with at least two ports and being capable of switching between an open position and a closed position, wherein the spring-supported electropneumatic input valve (104) is retained in the open position when there is no electronic activation of the spring-supported electropneumatic input valve (104), and wherein the spring-supported electropneumatic input valve (104) is connected to the manual brake pressure port (154) and receives the driver's brake demand pressure component;
• and
• a tractor protection module (124;
• 324;
• 524) provided within the housing structure (100a;
• 300a;
• 500a) of the electropneumatic trailer control module (100;
• 300;
• 500).