LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 2021 >> Metris Van Cargo >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Electrical System, Equipment & Instruments (05 Of 11) -- 447 Chassis >> Basic Knowledge >> Caravan Control Unit Configuration Of Digital Outputs, Function - GF54.21-D-5023TSA
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Caravan Control Unit Configuration Of Digital Outputs, Function - GF54.21-D-5023TSA

Model 447 

with code JA3 (Intelligent body control.) 

with code XM7 (MOPF II) 

Model 907, 910 

with code JA3 (Intelligent body control.) 

General 

The digital outputs are used to set digital signals (0 or 1).

The MB Advanced Control, control unit (N175) consists of two stages, MBAC Stage I and MBAC Stage II. The MBAC is designed so that the assignment of the I/O interfaces is configurable. The assignment of the I/O interfaces is configured by the bodybuilder manufacturer.

The MBAC can operate up to 29 digital outputs. Along with the 29 digital outputs, a further output exists for the wake-up signal of the parameterizable special module (PSM) ("Multi-Purpose module", "MPM"). The MBAC can operate 14 further pulse width modulated outputs.

IMPORTANT Pulse width modulation (PWM)

Assignment of I/O interfaces with digital outputs (example) 

Each stage has exactly one digital output "DO_Roof_Ventilator_Switch".

Each stage has exactly one digital output "DO_Roof_Hot_Water_Switch".

Each stage has exactly one digital output "DO_Roof_Heating_Switch".

Each stage has exactly one digital output "DO_Wake_MPM".

MBAC Stage I has exactly one digital output "DO_Pairing-Reset_LED_Switch".

PWM-compatible digital outputs 

General 

PWM outputs are used, e.g. to dim a light or to control the speed of simple motors. The MBAC can operate up to 14 PWM outputs. The PWM outputs switch to the high side (Tml. 30). All PWM outputs together provide a maximum output of 200 watts. The frequency of the PWM is 200 Hz with a tolerance of ±10 %. The PWM "duty cycle" can be changed in steps of 0.1 % with a tolerance of ±5 %.

Assignment of I/O interfaces with PWM-compatible digital outputs (example) 

Each stage has exactly one PWM-compatible digital output "DO_PWM_Heizung_Luefter1_Stage".

Each stage has exactly one PWM-compatible digital output "DO_PWM_Heizung_Luefter2_Stage".

Each stage has exactly one PWM-compatible digital output "DO_PWM_Heizung_Luefter3_Stage".

Each stage has exactly one PWM-compatible digital output "DO_PWM_Weiss1_Dimmer".

Each stage has exactly one PWM-compatible digital output "DO_PWM_Weiss2_Dimmer".

Each stage has exactly one PWM-compatible digital output "DO_PWM_Weiss3_Dimmer".

Each stage has exactly one PWM-compatible digital output "DO_PWM_RGB_RGB_Red".

Each stage has exactly one PWM-compatible digital output "DO_PWM_RGB_RGB_Green".

Each stage has exactly one PWM-compatible digital output "DO_PWM_RGB_RGB_Blue".

Each stage has exactly one PWM-compatible digital output "DO_PWM_Roof_Ventilator_Stage".

Assignment of I/O interfaces with power-transmitting digital outputs (example) 

Each stage has exactly one power-transmitting digital output "DO_Leistung_Heizung_Ventil_1_Active".

Each stage has exactly one power-transmitting digital output "DO_Leistung_Heizung_Ventil_1_Direction".

Each stage has exactly one power-transmitting digital output "DO_Leistung_Heizung_Ventil_2_Active".

Each stage has exactly one power-transmitting digital output "DO_Leistung_Heizung_Ventil_2_Direction".

Each stage has exactly one power-transmitting digital output "DO_Power_Heater_Active".

Each stage has exactly one power-transmitting digital output "DO_Power_Drain_Waste_Water_Valve_Control".

Each stage has exactly one power-transmitting digital output "DO_Power_Drain_Black_Valve_Control".

Each stage has exactly one power-transmitting digital output "DO_Power_Refrigerator_Pump".

Each stage has exactly one power-transmitting digital output "DO_Power_Pop-Up-Roof_Motor_Active".

Each stage has exactly one power-transmitting digital output "DO_Power_Pop-Up-Roof_Motor_Direction".

Each stage has exactly one power-transmitting digital output "DO_Leistung_Rollo1_Motor_Active".

Each stage has exactly one power-transmitting digital output "DO_Leistung_Rollo1_Motor_Direction".

Each stage has exactly one power-transmitting digital output "DO_Leistung_Rollo2_Motor_Active".

Each stage has exactly one power-transmitting digital output "DO_Leistung_Rollo2_Motor_Direction".

Each stage has exactly one power-transmitting digital output "DO_Power_Awning_Motor_Active".

Each stage has exactly one power-transmitting digital output "DO_Power_Awning_Motor_Direction".

Each stage has exactly one power-transmitting digital output "DO_Power_Roof_Window_Motor_Active".

Each stage has exactly one power-transmitting digital output "DO_Power_Roof_Window_Motor_Direction".

  Caravan control unit configuration of analog outputs, function   GF54.21-D-5021TSA 
  Caravan control unit configuration of analog inputs, function   GF54.21-D-5022TSA 
  Caravan control unit configuration of digital inputs, function   GF54.21-D-5024TSA 
  Caravan control unit parameters of analog inputs, function   GF54.21-D-5025TSA 
  Caravan control unit parameters of analog outputs, function   GF54.21-D-5026TSA 
  Caravan control unit parameters of digital inputs, function   GF54.21-D-5027TSA 
  Caravan control unit parameters of digital outputs, function   GF54.21-D-5028TSA 
  Overview of system components of caravan control unit Model 907, 910 GF54.21-D-9992TSA
  Overview of system components of caravan control unit Model 447 GF54.21-S-9992TMA