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Operation Modes
• Auto start
(with function E-stop and light curtain)
On automatic restart the output contacts are activated when the input
condition for the selected function is fulfilled.
A start-button is only necessary in 2 cases:
-
If the function light curtain, safety gate or 2-hand-safety is
combined with E-stop.
-
If a function with feedback circuit is selected and the unit has to
be reset after a detected fault without disconnection.
• Manual start
(with function E-stop and light curtain)
If the unit was deactivated by operating the safety function e.g. by pressing
an e-stop button it only can be reset in manual mode by pressing the
start button. After voltage failure the unit has to be reset also with the
start button. The button has to be pressed not longer then 3 sec. to allow
the unit to energise.
If one of the functions light curtain, safety gate or 2-hand-safety is
combined with E-stop the E-stop function always works with manual
restart.
When manual start is selected, the start button is always connected
to terminals S43-S44.
L+
A1+
S11 S12 S14 S13
BH5910
A2-
L -
Pic. 1:
E-stop, 2-channel, with 3 E-stop buttons, manual start and 2 external contactors with feed back circuits
(Switch 1: position 0, switch 10: position 4 or 5)
E-
E-
stop
stop
S21 S22 S24 S23
48
13
23
failure state
Feedback Circuit to Monitor External Contactors
If the number of contacts has to be increased or a higher current has to
be switched by contactors a feedback circuit with NC contactors can be
connected to terminals S41-S42 (see drawing 1). This circuit allows to monitor
the state of the external contactors. The BH 5910 monitors continuously if
the state of this input corresponds to the state of K1 and K2.
In the case of a fault K1 and K2 switch off or do not switch on at all. If the
fault is removed, the BH 5910 has to be reset with the start button.
When operating the unit with feedback circuit the circuit has to be
connected to terminal S41 and S42.
E-
K21
stop
K22
S31 S32 S34 S33
S41 S42 S44 S43
K1
K2
33
34
24
14
machine enabling
K22
K21
31
start
58
waiting for start
BH 5910 / 23.06.22 en / 594A
M8424_a
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