NORD Drivesystems BU0200 - Manual (Page 77)

SK 200E Manual for frequency inverters
76 Subject to technical alterations BU 0200 GB-4411
3.3 Control connections and configuration
The I/O and field bus option modules must be supplied with a control voltage of 24V DC (±20%). Wiring
sleeves must be used for flexible cables.
Name Data
Rigid cable cross-section 0.14 … 2.5mm²
Flexible cable cross-section 0.14 … 1.5mm²
AWG standard AWG 26-14
Tightening torque (for screw terminals) 0.5 … 0.6Nm
Note
For CANopen and DeviceNet, because of the separate potential levels of the system bus and the field bus,
both bus systems must have a separate supply (24V).
The data cables (e.g. CANopen, system bus) must be installed as short as possible and with the same
length inside the terminal box (unshielded part of the wiring). Associated data cables (e.g.: Sys+ and Sys-)
must be twisted together.
In case of EMC problems, a potential separation for the supply of the field bus, the digital inputs and system
bus interfaces as well as the two additional digital outputs of the external Technology Unit should be
provided.
Detailed information concerning the control connections can be found in Sections 3.4 and 3.5.
NOTE
The cable shield must be connected to the functional earth 5 (usually the electrically
conducting mounting plate), in order to prevent EMC interference in the device.
In order to achieve this, with the field bus connection the metal, metric EMC screw
connections for the connection of the cable shielding to the frequency inverter or the
housing of the Technology Unit must be used. This ensures a large-area connection of the
functional earth.
Configuration
The configuration is identical for all module version (except for mains units SK xU4-24V- … and the
electronic brake rectifier SK CU4-MBR, where no configuration is required). All the necessary settings are
made with the hardware via a DIP switch element (multiple switch block).
5
In systems, electrical equipment is usually connected to the functional earth. This serves to conduct leakage and interference
currents in order to ensure the EMC characteristics and must be connected in compliance with high-frequency methods.
Customer Unit SK CU4- … Technology Unit SK TU4- …
DIP switch element