rulmeca RDR BL3, Technical Manual

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TECHNICAL MANUAL FOR THE RDR BL3 - V1.1 DRIVE ROLLER Rev. 21/09/2018 page 30
10 FAULT SIGNALS
The RDR Drive Roller is provided with a protection system managed by the internal electronics that is able to
prevent damage to the Drive Roller by promptly sending the user or PLC a signal alerting to different types of
problem (alarm, fault).
The output signal supplied works as follows:
- If the motor operates without any problem being detected, the output signal will be high (+24VDC)
-
If the motor is stationary, or a problem has been detected, the output signal will be low (0V-GND)
The output voltage on the BLACK cable is +24 VDC (referring to positive, Open-Collector output).
The output fault signal can provide a maximum current of 20mA.
To connect the fault output to a PLC input is necessary to use and additional relay (not provided) connected
according to the diagram below.
WARNING:
-
Current requests above 20 mA damage the integrated electronic equipment.
Products returned because of such damage are therefore not covered by the warranty.
-
NEVER connect the yellow wire directly to the blue wire (0V-GND) or to the grounded metal because
this would cause a short circuit that could permanently damage the Drive Roller.
Products returned because of such damage are therefore not covered by the warranty.
- If there is a thermal overload fault, the motor will restart automatically without warning as soon as its
internal temperature returns within the acceptable range. Take the required safety measures to ensure
that roller conveyor operators are made aware of and protected against this eventuality.
- In case that the Drive Roller fault output is not connected (not recommended) will be lost only the
evidence of malfunctioning status.
-
The Drive Roller can work even without the Fault output connection. Still remaining the thermal and
overcurrents protections.
-
After three unsuccessful attempts to restart after an overcurrent fault (described in par. 11.2 ), the
protection can be reset as follows:
o
switch off the main power for at least 20 seconds.
o
remove the START Drive Roller command.