3
Device structure
Operating principle
Assembly and Operating Instructions – MAXO-MS/M/SM-GIOP Sensor Module
14
3.6 Operating principle
The following figure shows the block diagram of the sensor module:
[B]
X4251_11
X4251_12
X4030
X4101
X4111
X1512
μC
[2]
[1]
[2]
[2]
[3]
[5]
[6]
RF
ID chip
ind. track sensor
RFID antenna
GA
GA
[2]
[4]
DC-2
4-V
CAN
CAN
EtherCAT® RS422 CAN
33985535883
The sensor module is used in a mobile assistant. It consists mainly of the following
components:
[1] Communication interfaces
[2] Rotation rate and acceleration sensors
[3] Microcontroller
[4] Power supply
[5] Read head and antenna for detection of RFID transponders
[6] Inductive track guidance
Inductive track guidance [6] detects the deviation of the vehicle from the specified
track on the MOVITRANS
®
line cable. At the same time, odometry data is collected by
the rotation rate sensor and acceleration sensors.
The data of the inductive track guidance is transmitted to the microcontroller [3] via
CAN for evaluation. The data is also available to other devices via the CAN female
plug connector X4111. Another CAN female plug connector X4101 is connected to the
microcontroller and can be used for diagnostics or programming of the device.
The data of the RFID transponders is collected and read [5] and transmitted serially to
the microcontroller for referencing.
For traveling along an optical track, the sensor module can be equipped with an
RS422 interface for connecting an external optical track guidance.
The sensor module transmits the sensor data to a higher-level controller where it is
compared and evaluated.
The sensor module has 2 EtherCAT
®
interfaces (X4251_11 and X4251_12) for integ-
ration into an EtherCAT
®
topology and as a prerequisite for communication with a
higher-level controller.
26868113/EN – 03/2021
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