nord NORDAC START Series, Руководство пользователя

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NORDAC START (SK 135E / SK 175E) – Users Manual for Motor Starters
42 BU 0135 en-4118
2.3.3 Electrical connection of the control unit
Connection data:
Terminal bar X3 X4, X5
Cable Ø * [mm²] 0.2 … 1.5 0.2 … 1.5
Ø cable * [mm²] 0.2 … 0.75 0.2 … 0.75
AWG standard 24-16 24-16
Tightening torque [Nm] 0.5 … 0.6 Clamping
[lb-in] 4.42 … 5.31
Slotted screwdriver [mm] 2.0 2.0
* Flexible cable with wire-end ferrules, without plastic collar or rigid cable
** Flexible cable with wire-end ferrules with plastic collar (for cable cross-section 0.75 mm², a wire-end
ferrule with a length of 10 mm must be used)
The device must be provided with an external 24 V control voltage supply. Alternatively, an optionally
available 24 V power of type SK CU4-… or SK TU4-… can be used.
The provisions in chapter 4.3 "AS Interface (AS-i)" apply to devices in which the
AS interface is used.
Information
Control voltage overload
A control unit overload caused by impermissibly high currents may destroy the unit. Impermissibly high currents
occur if the actual total current that is drawn exceeds the permissible total current or if the 24 V control voltage for
other devices is routed through the device. To avoid conduction through the frequency inverter, e.g. double wire
end ferrules must be used.
Information
Total currents
If necessary, 24 V can be drawn from several terminals. This also includes e.g. digital outputs or a operating
module connected via RJ45
The total currents which are drawn off must not exceed 200 mA (SK 175E-…-ASI: 165 mA).
Information
Reaction time of digital inputs
The reaction time of a digital signal is approx. 4-5 ms and consists of the following:
Scan time 1 ms
Signal stability check 3 ms
Internal processing < 1 ms
Information
Cable laying
All control cables (including thermistors) must be routed separately from the mains and the motor cables to
prevent interference in the device.
If the cables are routed in parallel, a minimum distance of 20 cm must be maintained from cables which carry a
voltage of > 60 V. The minimum distance may be reduced by screening the cables which carry a voltage, or by
the use of earthed metal partitions within the cable conduits.
Alternative: Using a hybrid cable with shielding of the control lines.