Input Interface, PSM, Function - GF54.21-D-3001TSB

Model 447, 448

with code ED5 (Parameterisable special module)

with code XM7 (MOPF II) Model 907, 910

with code ED5 (Parameterisable special module)

with code XJ4 (Modification year G4-I)

Multifunction inputs (MFE)

The parameterizable special module (PSM) control unit (N26/16) has a total of 25 discrete inputs. These MFEs can be configured individually. It should be noted that not all MFEs have the same capabilities.

The inputs can be divided into two categories:

MFE_ANALOG_INPUT	8 low-active inputs (for parameterization as a digital input)	with switchable pull-up resistor, wake-up capable	MFE_01-08
	1 high-active input (for parameterization as a digital input)	with pull-down resistor	MFE 25
MFE_DIGITAL_INPUT	8 low-active inputs	with pull-up resistor, wake-up capable	MFE_09-16
	8 high-active inputs	with pull-down resistor, wake-up capable	MFE 17-24

INPUT MAPPING TABLE

Number	Function
MFE_01	Analoger_Eingang_1
MFE_02	Analoger_Eingang_2
MFE_03	Analoger_Eingang_3
MFE_04	Analoger_Eingang_4
MFE_05	Analoger_Eingang_5
MFE_06	Analoger_Eingang_6
MFE_07	Analoger_Eingang_7
MFE_08	Analoger_Eingang_8
MFE_09	Digital_low-active _input_1aktiver_Eingang_1
MFE_10	Digital_low-active _input_2aktiver_Eingang_2
MFE_11	Digital_low-active _input_3aktiver_Eingang_3
MFE_12	Digital_low-active _input_4aktiver_Eingang_4
MFE_13	Digital_low-active _input_5aktiver_Eingang_5
MFE_14	Digital_low-active _input_6aktiver_Eingang_6
MFE_15	Digital_low-active _input_7aktiver_Eingang_7
MFE_16	Digital_low-active _input_8aktiver_Eingang_8
MFE_17	Digital_high-active _input_1aktiver_Eingang_1
MFE_18	Digital_high-active _input_2aktiver_Eingang_2
MFE_19	Digital_high-active _input_3aktiver_Eingang_3
MFE_20	Digital_high-active _input_4aktiver_Eingang_4
MFE_21	Digital_high-active _ input_5aktiver_Eingang_5
MFE_22	Digital_high-active _ input_6aktiver_Eingang_6
MFE_23	Digital_high-active _ input_7aktiver_Eingang_7
MFE_24	Digital_high-active _ input_8aktiver_Eingang_8
MFE_25	Analoger_Eingang_25

Analog inputs

Function type MFE_ANALOG_INPUT

Courtesy of MERCEDES-BENZ USA

The analog multifunction inputs can be parameterized differently via their properties. For example, an analog input can also be used as a digital input or the input voltage can be divided and evaluated in 4 stages or areas.

Analog inputs are parameterizable as:

Analog input (voltage value, 16 bit)
Analog input (4 stages, fixed)
Analog input (4 stages, adjustable)
Digital input (low-active)
Alarm button
Reset button

The picture shows the parameterizable input factors of the module (wake, reset) on the left side. The output factors that can be found in the signal pool as signals are shown on the right side.

Each multifunction input is assigned a physical pin of the control unit to which the input voltage can be applied.

Contents

Multifunction input
Properties
Parameter
Signal inputs
Result signal

MULTIFUNCTION INPUT

Number
MFE_01	Low-active input with switchable pull-up resistor
MFE_02	Low-active input with switchable pull-up resistor
MFE_03	Low-active input with switchable pull-up resistor
MFE_04	Low-active input with switchable pull-up resistor
MFE_05	Low-active input with switchable pull-up resistor
MFE_06	Low-active input with switchable pull-up resistor
MFE_07	Low-active input with switchable pull-up resistor
MFE_08	Low-active input with switchable pull-up resistor

Properties

Electrical properties

All analog inputs can be configured as wake-up capable. In this case, the control unit is woken up by a flank change at the wake-up-capable analog input. The digital voltage levels relevant to the wake-up function cannot be configured.

DEPENDENCIES OF CONFIGURED PARAMETER 'EVALUATION' TO WAKE-UP AND PULL-UP

	Digital input	Threshold values, 4 stages, fixed	Alarm button	Reset button	Series resistor, 560 ohms	Measurement of voltage	Threshold values, configurable
Wake-up	X	X	X	X	X	X	X
Pull-up	X	X	X	X	X	-	X

The pull-up resistor is activated in sleep mode of the control unit if the input is configured as wake-up capable. Otherwise, the pull-up resistor is deactivated in sleep mode.

PARAMETER

Name	Description
Model	Edge-controlled The status of the result signals is switched on for each detected rising edge. A reset can be performed by means of an assigned result signal at the reset signal input.
	State-controlled The assigned result signal value at the reset signal input has no effect.
Evaluation	Configures the type of evaluation of the input. This results in the corresponding result signals. (see result signal)
Threshold value stage 1	Configures the threshold for the "Stage 1" result signal relative to the supply voltage in %. Is evaluated if the "Evaluation" parameter is set to "threshold values, configurable".
Threshold value stage 2	Configures the threshold for the "Stage 2" result signal relative to the supply voltage in %. Is evaluated if the "Evaluation" parameter is set to "threshold values, configurable".
Threshold value stage 3	Configures the threshold for the "Stage 3" result signal relative to the supply voltage in %. Is evaluated if the "Evaluation" parameter is set to "threshold values, configurable".
Threshold value stage 4	Configures the threshold value for the "Stage 4" result signal relative to the supply voltage in %. Is evaluated if the "Evaluation" parameter is set to "threshold values, configurable".

SIGNAL INPUTS

Name	Description
Wake up	The assigned result signal value activates or deactivates the ability to wake up the control unit. An input is only considered a potential network sleep blocker if this signal has been activated!
Reset	If the input is configured as "Edge-controlled", a positive flank change at the signal input sets all result signals to 0.

RESULT SIGNAL - DEPENDENCIES ON CONFIGURED 'EVALUATION' PARAMETER TO EVALUATION RESULT SIGNALS

Name

Digital input

Threshold values, 4 stages, fixed

Alarm button⁽¹⁾

Reset button⁽¹⁾

Series resistor, 560 ohms

Measurement of voltage

Threshold values, configurable

Alarm button (without line recognition) ⁽¹⁾

Reset button (without line recognition) ⁽¹⁾

Description

Strong pull-up/pull-down (1.8 kOhm)

Weak pull-up (100 kOhm)

Digital (MFE_x)

30%

25%

10%

Unknown

Stage 2

10%

Input voltage > activation threshold

Reverse (MFE_x_inv)

Unknown

Logical inversion of 'Digital' result signal

Analog (MFE_x_analog)

Input voltage in 1 mV/bit

Relative (MFE_x_rel)

Input voltage relative to operation, voltage in %

Stage 1 (MFE_x_Stufe_1)

Unknown

Input voltage > threshold value stage 1

Stage 2 (MFE_x_Stufe_2)

30%

25%

10%

Unknown

10%

Input voltage > threshold value stage 2

Stage 3 (MFE_x_Stufe_3)

Unknown

50%

22%

15%

Unknown

22%

Input voltage > threshold value stage 3

Stage 4 (MFE_x_Stufe_4)

Unknown

75%

30%

22%

Unknown

30%

Input voltage > threshold value stage 4

Hysteresis (digital/gradually)

-1%

Hysteresis for threshold value measurement

Monitoring OK ⁽¹⁾
(MFE_x_Monitoring_OK)

The value is incorrect when the open load or the clamping button is detected.

Open load ⁽¹⁾ (MFE_x_Open_Load)

Open load is detected if input voltage > threshold stage 4 is longer than 2 s

Sticking Key ⁽¹⁾
(MFE x Sticking Key)

Clamping button is detected if stage 1 is activated for longer than 1 s.

Wake Up (MFE_x_wakeup)

Control unit can be woken up via the input.

⁽¹⁾	Alarm and Reset button with/without line recognition are only available with MFE_07 and MFE_08. Additional evaluations for alarm and reset push-buttons of MFE_ 07 and 08 are: Monitoring of input: Open load (interruption) and clamping buttons.

Digital inputs

The digital multifunction inputs can be parameterized as state-controlled or edge-controlled via their properties.

Courtesy of MERCEDES-BENZ USA

The picture shows the parameterizable input factors of the module (wake, reset) on the left side. The output factors that can be found in the signal pool as signals are shown on the right side.

Each multifunction input is assigned a physical pin of the control unit to which the input voltage can be applied.

Contents:

Multifunction input
Properties
Parameter
Signal inputs
Result signal

MULTIFUNCTION INPUT

Number
MFE_09	Low-active input with pull-up resistor
MFE_10	Low-active input with pull-up resistor
MFE_11	Low-active input with pull-up resistor
MFE_12	Low-active input with pull-up resistor
MFE_13	Low-active input with pull-up resistor
MFE_14	Low-active input with pull-up resistor
MFE_15	Low-active input with pull-up resistor
MFE_16	Low-active input with pull-up resistor
MFE_17	High-active input with pull-down resistor
MFE_18	High-active input with pull-down resistor
MFE_19	High-active input with pull-down resistor
MFE_20	High-active input with pull-down resistor
MFE_21	High-active input with pull-down resistor
MFE_22	High-active input with pull-down resistor
MFE_23	High-active input with pull-down resistor
MFE_24	High-active input with pull-down resistor

Properties

Pull-up resistor

The pull-up resistor is activated in sleep mode of the control unit if the input is configured as wake-up capable. Otherwise, the pull-up resistor is deactivated in sleep mode.

Pull-down resistor

The pull-down resistor is deactivated when the control unit is in sleep mode, irrespective of how the inputs are configured.

PARAMETER

Name	Description
Model	Edge-controlled The status of the result signals is switched on for each detected rising edge. A reset can be performed by means of an assigned result signal at the reset signal input.
	State-controlled The assigned result signal value at the reset signal input has no effect.

SIGNAL INPUTS

Name	Description
Wake up	The assigned result signal value activates or deactivates the ability to wake up the control unit. The control unit is woken up by a signal edge (rising or falling) at the input.
Reset	If the input is configured as "Edge-controlled", a positive flank change at the signal input sets all result signals to 0.

RESULT SIGNAL

Name	Description
Wake up (MFE_x_wakeup)	The logical result signal is TRUE if the input was the reason for the control unit waking up.
Digital (MFE_x)	The logical result signal is TRUE if the input is active.
Invert (MFE_x_Inv)	Inverted result signal. In other words, the logical result signal "Invert" contains the inversion of the result signal "Digital".