3 General description, function
12 10.20133
BA_SLE22_EN.DOCX
→ max. difference =
=
WARNING
The down motion (outputs K
↓ and K↓↓ activated) is still possible at overload and
sensor error to permit a suspended load to be set down if necessary!
3.7 General functions
3.7.1 Activation, relay outputs and motor management
Activation
Safety inputs S↑, S↓ and input S↕↕ are read in relation to N.
S↑ and S↓ are transmitted on two channels to both controllers in the device and evalu-
ated in accordance with category 2 performance level d.
The activation of S↕↕ is only detected if the related direction S↑ or S↓ is also active at
the same time.
If S↑ or S↓ are activated from idle state, the SLE22 switches the related safety output
K↑ or K↓ after a maximum delay time of 300 ms.
Relay outputs
The relay outputs switch the voltage connected to L↑↓ which must coincide with the
supply voltage at L.
In accordance with category 2 performance level d, the safety outputs K↑ and K↑↑ are
supplied by an internal safe circuit. In the case of a fault or at overload this circuit discon-
nects safety outputs K↑ and K↑↑ .
Safety outputs K↓ and K↓↓ are also supplied by an internal safe circuit in accordance
with category 2 performance level d.
In the case of a fault this circuit disconnects safety outputs K↓ and K↓↓ .
Safety output K↑↑ or K↓↓ is only active in conjunction with safety output K↑ or K↓ .
Motor management
off times for hoisting and lowering motions are combined in the term motor manag
ment.
The cut-off times are explained below on the example of hoisting:
Starting via slow speed ta:
If S↑ and S↕↕ are activated together, K↑ is switched first. After cut-off time ta has
expired, K↑↑ is activated.
Braking via slow speed tb:
If K↑ and K↑↑ are active, K↑↑ is switched off after activation of S↑ and S↕↕ K↑↑ is
switched off. After the expiry of braking time tb, K↑ is also no longer activated.
Cut-off time for slow speed tl and fast speed ts:
If S↑ or S↕↕ are not active, K↑ or K↑↑ are no longer activated. If S↑ or S↕↕ are switched
again directly afterwards, K↑ or K↑ and K↑↑ are activated after expiry of the cut-off time
for slow speed tl or fast speed ts.
Cut-off time for change of direction tr:
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