NORD Drivesystems BU0230 - Manual (Page 73)

10 Technical data
BU 0230 GB-2712 73
10.6 Data for switching off the 24V supply
(only for SK 205E, SK 215E Size 1 to 3)
Function Specification
Input voltage +24 V
Voltage tolerance ±25 % (18 V…30 V)
Operation at OSSD - 10 % +25 % (21.6 V…30 V)
Power consumption ≤ 500 mA (mean value)
For details see Section 24 V supply
Peak current ≤ 1 A (Peak, on switch-on)
≤ 6.5 A (Peak, on OSSD)
For details see Section 24 V supply
Cable length ≤ 100 m (refer to EMC, grouping)
Line capacitance ≤ 2 nF * t
OSSD
/ 0.1 ms per connected inverter
(with t
OSSD
= Width of test pulse, max. 0.5 ms)
Switch-on delay ≤ 3 s
Reaction time ≤ 200 ms (≤ 80 ms typical)
Cycle time ≥ 4 s
Requirements made of OSSDs Test pulse width ≤ 500 µs
Duty (high level) ≥ 90 %
Distance between double pulses ≥1ms (note the duty factor)
Safety integrity level (IEC 61508) SIL3
Probability of a hazardous failure per
hour PFH = 0
Probability of a hazardous failure on
call-up PFD = 0
Proportion of safe failures SFF = 100 %
Safety category
(as per to EN ISO 13849-1)
Cat. 4
Performance level
(as per to EN 13849-1) PL e
The mean time until a hazardous
failure MTTF
d
= "High" (>100 years)
Diagnostic coverage level DC cannot be established (PFH=0)
Lifetime TM = 5 years