Parameterizable Special Module (PSM), Function - GF54.21-S-0002TRF
Model 447
with code ED5 (Parameterisable special module)
except code XM7 (MOPF II)
Model 448
with code ED5 (Parameterisable special module)
except code XM7 (MOPF II)
Parameterizable special module control unit, design and function
The parameterizable special module (PSM) control unit (N26/16) forms the interface between the vehicle and the bodybuilder manufacturer electronics.
Thanks to the bodybuilder manufacturer electronics, vehicle status can be read and vehicle functions controlled (e.g. the central locking system) by means of the parameterizable special module (PSM) control unit (N26/16) via the Controller Area Network (CAN).
For this purpose, there are digital and analog inputs and outputs.
- Plug 1 = 0 multifunction inputs, 8 multifunction outputs
- Plug 2 = 10 multifunction inputs, 12 multifunction outputs
The discrete multifunction outputs 01 to 05, 08 to 14 and 16 to 20 can also be used as inputs.
The configuration can be adjusted by means of diagnosis.
The peripheral devices CAN (1) is available as an additional interface for complex add-on equipment that require more inputs or outputs. A multitude of vehicle signals are transmitted on this. In addition there are some "free messages" which can be freely assigned with any content.
The parameterizable special module (PSM) control unit (N26/16) can thus forward information, which it receives as CAN messages, to outputs or the peripheral devices CAN (1). In exactly the same way, the parameterizable special module (PSM) control unit (N26/16) can forward inputs or information from the peripheral devices CAN (1) to the interior CAN (CAN B).
Beyond the interfaces, the following base functions are also available in the parameterizable special module (PSM) control unit (N26/16), e.g.:
- Diagnosis
- Run-on time
- Alarm function
- Dealer alarm status
- Radio assistance call
- Networked alarm actuators
- Close central locking system in event of alarm
- Vehicle battery condition
- Speed and distance information
- Functionality of the programmable logic controller (PLC) (logic operations AND, OR etc. of signals)
The type and direction of information and interfaces are parameterized with the aid of the diagnostic system. Only through this coding is the functionality of the parameterizable special module (PSM) control unit (N26/16) established and adapted to the corresponding body.
For special equipment codes available ex factory, coding of the parameterizable special module (PSM) control unit (N26/16) can be performed at the touch of a button via the standard coding menu. Coding via expert coding is required for all other adjustments.
Signal processing time and signal routing
The signal processing time in the parameterizable special module (PSM) control unit (N26/16) must not exceed 50 ms.
The signal processing time is, for example, the time between the activation of an input and the reaction at an output.
In the case of the signal routing latency time, the cycle time of the message to be routed must also be added.
Actuations of the supply outputs multifunction output 01 to 04 are not included in this latency time request.
A reaction time of up to 800 ms is permissible for actuation of these supply outputs.
Operating safety
The parameterizable special module (PSM) control unit (N26/16) must not impair the performance and operational safety of the vehicle, regardless of whether the PSM is in a valid or invalid operating status.
The parameterizable special module (PSM) control unit (N26/16) does not therefore contain any safety-relevant functions.
Interfaces
Electrical interfaces must always be designed such that:
- No information loss or information falsification occurs
- Incorrect activation of functions is avoided
- Irreparable damage caused by possible short circuiting during adaptation or working on live components is avoided
- Irreparable damage to the components during adaptation on integrated sensors, actuators or other control units is avoided, also as a result of electrostatic discharge
| Parameterizable special module (PSM) control unit connector assignment | GF54.21-S-0002-04TRA | ||
| Signal concept, PSM, function | GF54.21-S-2000TRA | ||
| Interfaces, PSM, function | GF54.21-S-2001TRA | ||
| Functional scope, PSM, function | GF54.21-S-2002TRA | ||
| Parameterization, PSM, function | GF54.21-S-2003TRA | ||
| Signal lists, PSM, function | GF54.21-S-2004TRA | ||
| Overview of system components for parameterizable special module (PSM) | GF54.21-S-9998TRA |