8
Maintenance and servicing
Technical specifications
48
Copyright © Müller-Elektronik GmbH & Co.KG
Pin no.:
Signal:
Pin no.:
Signal
2
CAN_L*
7
CAN_H*
3
CAN_GND*
8
CAN_EN_out**
4
CAN_H
9
+ Vin*
5
CAN_EN_in
+Vin = voltage supply (+)
–Vin = ground (-)
* - The signals marked with * correspond to the CiA assignment (CAN in automation).
The two signals CAN_L and CAN_L* or CAN_H and CAN_H* are linked internally and used to loop
the CAN bus through.
Assigning CAN_EN_in to the supply potential (= +Vin) enables the terminal to be switched on.
When switched on, the terminal supplies voltage to the CAN_EN_out (minus approx. 1.2 V), which is
required to activate the connected jobcomputers.
The signals '-Vin' and 'CAN_GND' are directly linked with both connectors, therefore it is crucial to
avoid differences in potential between the pins of these two connectors.
Pin assignment of port C
Port C is an RS232 interface
CAUTION
Damage to the equipment caused by short circuit
Pin 4 of port C is live. The voltage depends on the operating voltage of the terminal and is used to
supply the DGPS Receiver A100 from Müller Elektronik.
Other GPS Receivers may suffer damage if connected to this port.
Before connecting a different GPS Receiver:
◦
Check what voltage the terminal is connected to (12 V or 24 V).
◦
Check the pin assignment of the GPS Receiver.
◦
Check the allowable voltage for the GPS Receiver.
◦
Compare the terminal voltage to the allowable voltage for the GPS Receiver.
◦
Compare the pin assignment.
◦
Only connect the GPS Receiver to the terminal, if the voltage range and pin assignment of both
devices don't differ from each other.
Pin no.:
Signal
1 DCD
2 /RxD
8.4.3