SI-Safety Installation & Operating Manual
47
Issue Number: 1
S
Devi
Te
safety
Inst
all
S
S
M
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SI-Safety
En
Va
Enc
oder
Am
endment
Index
For characteristics curve and s with overspeed distance, the following applies:
Table 5-2 Relationships with overspeed distance
For characteristics curve V and s, the following relationships occur without overspeed
distance:
Table 5-3 Relationships without overspeed distance
The filter action moves the set speed threshold of
V
a
upwards by an amount of
delta_v_filter
. Consideration must also be given to the new figures for response time
( Treact = Tsmx + Tfilter )
, as well as of the resultant speed when disengaged by the
module.
Parameter(s)
Calculation procedure
Comment
T
response
Value from response time figure
+ retardation time in external
disengagement chain
Retardation time in external
disengagement chain,
derived from details from
manufacturer of relay,
contactor, brake, etc.
a
F
, a
V
Not applicable
Estimate from application
V
a2
= a
F
* t
response
+ (V
S
2
+ 2 * a
F
* XF)
1/2
Parameter(s)
Calculation procedure
Comment
T
response
Value from response time figure
+ retardation time in external
disengagement chain
Retardation time in external
disengagement chain, derived
from details from manufacturer
of relay, contactor, brake, etc.
a
F
, a
V
n.a.
Estimate from application
V
a1
= V
S
+ a
F
* t
response
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