NORD Drivesystems BU0230 - Manual (Page 44)

Functional safety with NORD SK 200E frequency inverters
44 BU 0230 GB-2712
3.5.4 EMC
With EMC-compliant wiring of the "safe pulse block", the EMC guideline values (see BU 0200 GB) can be
complied with up to a cable length of 100m between the protective switching device and the inverter.
3.6 24 V supply
If the 24 V supply is used as the safe shut-down method, a dual conductor, shielded cable must be used. The
shield must be connected at on both ends.
NOTE
No optional modules (e.g. SK CU4-PBR, SK CU4-CAO, SK CU4-DEV, SK CU4-IOE, etc.)
and no further consumers (e.g. sensors, rotary encoders, etc.) may be connected to the 24V
supply used for the "safe stop".
The cable which is used must be dimensioned so that there is a voltage of at least 18V at the input terminals.
For operation with an OSSD, a voltage of at least 21.6 V is required.
Input voltages: 24 V

25 % = 18 V … 30 V
(24V – GND) 24 V -10 % +25 % = 2 1.6 V … 30 V for operation with OSSD
500 mA (AV) without load from the digital output DO1
1 A (Peak) after switch-on (Off time: ≥ 1 s)
up to 6.5 A (Peak) after a test pulse from an OSSD
Eingangsstrom (ohne Belastung von DO1)
0,2
9A 0,3
3A
0,3
7A
0,4
3A
0,5
0A
0,1
9A 0,2
1A 0,2
3A
0,2
6A
0,3
0A
0,1
6A 0,1
7A 0,1
9A 0,2
1A
0,2
4A
0,00A
0,10A
0,20A
0,30A
0,40A
0,50A
0,60A
18V 20V 22V 24V 26V 28V 30V
Spannung an den Eingangsklemmen
max.
typ. BG III
typ. BG I+II
The input currents shown in the graphs are average values. The typical currents differ according to the size
(BG) of the FI (see identification system). If a SimpleBox or ParameterBox is connected via the RJ12 control
block for servicing (see Manual BU 0200 GB), the resulting current requirement of approx. 50 mA must also be
taken into account.
The maximum input current is derived from the rated power of the internal mains unit. The peak current on
switch-on is double the maximum input current.
Input current (without load from DO1)
Voltage at input terminals
Max.
typ. S 3
typ. S 1+2