SIEB & MEYER sinudyn-0360520 Series, Описание аппаратуры

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Restart Lock acc. to Safety Concept K2
sinudyn-36 Hardware Description 0360520 81
13.1 Functional Description of the Restart Lock
The restart lock locks the respective drive of an installation. All further drive modules
(servo amplifiers / frequency converters) remains ready for operation.
A TÜV checked safety circuit accesses relevant control of the output stage transis-
tors of the drive to be locked by interrupting the voltage supply of the controls. Thus,
no control pulses can be passed on to the transistors of the output stages and the
motor is at a secure standstill.
OSSD (Output Signal Switching Device)
Part of the contactless protective unit (German abbreviation = BWS) which is con-
nected with the machine control and which switches over into the OFF state, when
the sensor unit is triggered during the intended operation. (See IEC 61496-1)
The OSSD signal is a pulsed signal, of which the phase position is shifted in relation
to the different channels. All error can be detected by checking the pulse pattern,
short-circuit for supply, cross-circuit or defect of the device. This ensures a very high
safety level (SIL 4).
The TÜV checked safety circuit is controlled by the OSSD1+2 signal or the two +24 V
conductors via one or several emergency stop switch devices. If the OSSD signal or
at least one of the two 24 V conductors fail, the safety circuit switches the pulse pat-
tern of the output stage control sectors. The typical reaction time of the restart lock
is 2 ms and max. 45 ms.
The restart lock must only be controlled when
X the drive is at a secure standstill (stop category 2),
X the higher-ranking control has deactivated the drive module,
X (reference speed value 0),
X the holding brake of the motor has been arrested.
OSSD test frequency OSSD test pulse width