Electrical Connection Of The Control Unit - Nord Drivesystems NORDAC FLEX SK 200E Series User Manual

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2.4.3 Electrical connection of the control unit

Connection data:
Terminal block
Cable Ø *
AWG standard
Tightening torque
Slotted screwdriver
* flexible cable with wire-end ferrules (with or without plastic collar) or rigid cable
SK 2x0E
The device generates its own 24 V DC control
voltage and provides this to terminal 43 (for
connecting external
example).
However, size 4 device can also be supplied
by an external control
(connection to terminal 44). The switchover
between the internal and external power
supply takes place automatically.
Information
A control unit overload caused by non-permissible high currents can destroy the unit. Impermissibly high currents
occur if the total cuurent which is actually obtained exceeds the permissible total current, or if the 24 V DC control
voltage for other devices is passed through the frequency inverter. To avoid conduction through the frequency
inverter, e.g. double wire end ferrules must be used.
The control unit can also be overloaded and destroyed if the 24 V DC supply terminals of devices with an
integrated power supply (SK 2x0E) are connected to a different voltage source. For this reason, particularly when
installing connectors for the control connection it must be ensured that any cores for the 24 V DC power supply
are not connected to the device but are insulated accordingly (example of connector for system bus connection
SK TIE4-M12-SYSS).
Information
24 V DC can be taken from several terminals if necessary. This also includes e.g. digital outputs or a operating
module connected via RJ45
The sum total of the currents that are obtained must not exceed:
Device type
SK 2x0E
SK 2x5E
Devices with AS Interface, when using the AS Interface
BU 0200 en-3118
Size 1-4
Typically
[mm²] 0.2 ... 2.5
24-14
[Nm] 0.5 ... 0.6
[lb-in] 4.42 ... 5.31
[mm] 3.5
sensor systems, for
voltage source
2 Assembly and installation
Size 4
Terminals 79/80
0.2 ... 4
24-12
0.5 ... 0.6
4.42 ... 5.31
3.5
SK 2x5E
The device must be provided with an external
24 V DC supply. Alternatively, an optionally
available 24 V DC power supply of type
SK CU4-... or SK TU4-... can be used.
The control voltage for devices that use the
AS interface (SK 225E and SK 235E) must
be supplied via the yellow AS interface line.
However, in this case the frequency inverter
must not have an additional supply via
terminal 44 in order to prevent damage to the
mains unit or the AS interface bus.
Control voltage overload
Total currents
Size 1 to 3
200 mA
200 mA
60 mA
Size 4
500 mA
-
60 mA
65