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In order to start a muting sequence, the muting sensors SM1 and SM2 must be activated within a time frame of maximum 10 s.
The muting sequence is stopped after de-activating the first of the two end muting sensors EM1 or EM2.
In any case, the muting sequence will be interrupted after the maximum selected muting time has elapsed. If an object remains
accidentally in the detection field of the safety device, an external temporary manual muting (customer supplied) may be used to
evacuate the detection field (see chapter "Temporary Manual Muting").
APPLICATION EXAMPLE 3: MUTING ON A MECHANICAL PRESS
3A – Muting on a mechanical press with
2 muting sensors and 2 mutable safety devices
FF-SG
Safety light
curtain
Mechanical press
Application description
On a mechanical press, the mutable safety device(s) (e.g. safety light curtain) can be muted as soon as the press tool reaches
the bottom dead centre (BDC), allowing the operator to unload the press during the opening stroke without stopping the press
movement.
As soon as the press tool reaches the BDC, muting sensors SM1 and SM2 are activated by the rotating disk cam. A muting
sequence will be started, when muting sensors SM1 and SM2 are activated within a time frame of 10 s.
The muting sensors must remain activated till the press tool initiates its closing stroke. When the first of the two muting sensors
is de-activated by the rotating disk cam, the muting sequence will be stopped.
The muting system is composed of the following elements:
• the FF-SRM200P2 muting module,
• example 3A: 2 mutable safety devices (e.g. FF-SG safety light curtains): select modes 30 to 39,
• example 3B: 1 mutable (e.g. FF-SG safety light curtain) and 1 non-mutable safety device (e.g. GK safety key interlock) to
monitor the safety door ("guard only"): select modes 20 to 29,
• 2 auxiliary muting sensors SM1 and SM2 to start and end the muting sequence (e.g. cam operated safety switches).
The use of the second mutable or non-mutable safety device connectable to the same FF-SRM200P2 module is optional.
1
2
opening stroke
BDC
Protection
Muting starting
(SM1 activated)
(SM1& SM2 activated)
FULL REVOLUTION MECHANICAL POWER PRESSES CANNOT BE STOPPED IN MID-STROKE (OSHA 29CFR 1910.217)
DO NOT use light curtains and the FF-SRM200P2 muting module on full revolution mechanical power presses.
MECHANICAL POWER PRESS OPERATING IN REVERSE MODE
•
By regulations and standards, the muting function shall only be used during non-hazardous portion of the mechanical power
press cycle, i.e. during die opening when the press is running forward.
•
Because it is foreseeable that the press may be run in reverse or the press crankshaft rotation direction changed,
even accidentally, do NOT install the Honeywell muting system on mechanical power presses.
•
The muting function provided by the Honeywell product does NOT recognize the crankshaft rotation direction (clockwise or
counterclockwise). If it were installed to operate during the upstroke when running forward, then muting would occur during
the downstroke when running reverse. Muting is ONLY permitted during the non-hazardous upstroke (die opening portion of
the cycle).
Failure to comply with these instructions will result in death or serious injury.
107111-11-EN FR26 GLO 503 Printed in Germany
FF-SG
Mechanical fences
Safety light
curtain
4
3
TDC
opening stroke
Muting maintained
Muting in progress
(SM1& SM2 activated)
(SM1& SM2 activated)
3B – Muting on a mechanical press with 2 muting
sensors, 1 mutable and 1 non-mutable safety device
Mechanical
fences
Safety
switch
Door
5
6
closing stroke
closing stroke
Protection
Muting interrupted
(SM1& SM2 released)
(SM1 released)
FF-SG
Safety light
curtain
Mechanical press
SM1: muting sensor 1
SM2: muting sensor 2
BDC (Bottom Dead Center): point
at which the tool is closest to the
die.
TDC (Top Dead Center):
point at which the tool is furthest
to the die.
13
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