Bosch rexroth VM350 Betriebsanleitung Seite 35

3609929B32/2021-09 | VM350
Product description
Boundary conditions:
• 24 V supply from an internal power pack
• emergency OFF operating device according to
ISO 60947-5-1.
• The maximum line length for the emergency
OFF circuit is 30 m.
• The emergency OFF must be designed as a
system emergency OFF in accordance with
DIN EN ISO 13849.
• The emergency OFF operating devices and
emergency OFF switchgears (e.g. PNOZ) must
be switched and inspected regularly according
to the device description.
• Safety-relevant cables that are moveable must
be short-circuit and cross-fault proof.
• The internal supply for the emergency OFF
function is designed as an PELV.
• The cables and lines (visual inspection), as
well as the function of the emergency OFF
circuit, must be checked at regular intervals.
Case A:
Emergency OFF switch directly connected to the
contacts for the emergency OFF:
• The tightening spindles are stopped by the
servo amplifiers and the internal automatic
cutouts for the individual servo amplifiers are
opened when the S1 emergency OFF switch
is activated. This tightening job abort leads to
an error message in the controller. Restarting
is possible after closing switch S1 and
acknowledging the error message.
Bosch Rexroth AG
Case B:
Use of an emergency OFF switch device, e.g.
PNOZ:
• The cut-out of the emergency OFF circuit in the
emergency OFF switch device results in the
same function as described under A. Restoring
the free contacts from the internal automatic
cutouts to X1, X2 is not necessary.
• Variant 1: These contacts are bridged if the
emergency OFF switch device is used
exclusively for the tightening system.
• Variant 2: If further movements must be
queried, e.g. feed slides, etc., they will be
returned as usual via X1, X2.
Case C:
The following boundary conditions apply in this
operating mode:
When an emergency OFF is triggered
•
(mains supply interrupted), the external 24 V
supply must not be switched off as otherwise
data may be lost.
The external 24 V supply may not be generally
•
switched in order to avoid high starting
currents (on the secondary side).
• When an emergency OFF is triggered
(mains supply interrupted), no CW/CCW
should be set, as this can lead to system
errors.
• The maximum line length between power
pack and VM350 must not exceed 5 m.
• Triggering the emergency OFF (mains
switching) is subject to the same time
intervals as the switching on the mains. After
the return of the mains power supply, wait
approx. 10 s before setting CW/CCW.
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