STOBER 4 | UL-compliant use
03/2020 | ID 442793.03
17
Functional grounding
In addition to the protective grounding, a functional grounding is required for proper operation of the SC6 drive controller
and the motor. The functional grounding of the drive controller is connected using terminal X10, while that of the motor is
connected using terminals X20A and X20B. The connections for the functional grounding to terminals X10, X20A and X20B
are marked with PE. For UL-compliant operation: The connections marked with PE are intended solely for the functional
grounding.
Terminals
Note that the basic device is delivered without terminals. Suitable terminal sets are available separately for each size. An
order overview of the available terminal sets can be found in the appendix.
Motor overload protection/motor temperature protection
Use motor overload protection/motor temperature protection. The SC6 drive controller features connections for PTC
thermistors (NAT 145°C, sensor voltage = 3.3V
DC
, sensor current = 0.6mA) at X2A/X2B, pins 7 and 8. The devices are only
intended for use with motors with integrated temperature protection. In accordance with UL certification, operation
without motor overload protection/motor temperature protection in or on the motor (X2 jumpers) is not permitted!
For a proper connection, observe the terminal description for X2A in the chapter X2A: Motor temperature sensor A.
Braking resistor
If the drive controller is to be provided with an externally mounted braking resistor, overheat protection must be provided
separately.
Brake
Observe the technical data for the brake in the chapter Controllable brakes [}30].
Digital inputs
Observe the technical data for the digital inputs at X101 and X103 in the chapter Digital inputs [}26].
Power terminals
Use only copper conductors for a surrounding temperature of 60/75°C.
Fuses
Fuses must be approved for DC voltage in accordance with UL 248.
Low-voltage circuits must be supplied by an isolated source with a maximum output voltage that does not exceed 30V
DC
.
§ Provide the 24V
DC
supply for the brake using a 10 A fuse (time delay). Observe the terminal description for X11 in the
chapter X11: 24V supply [}59].
§ Provide the supply for the brake using a 10A fuse (time delay). Observe the terminal description for X300 in the
chapter X300: Brake 24V supply [}68].
§ For the STO safety function via terminal X12: Use a 3.15A fuse (time delay) to protect the supply voltage of the status
signal. Observe the terminal description for X12 in the chapter X12: Safety technology (option SR6) [}60].
UL test
Only the risks of electric shock and the risk of fire have been examined during UL acceptance. Functional safety aspects
have not been assessed during the UL approval process. These are assessed for STOBER by bodies such as the TÜV SÜD
certification service.