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1 INFORMATION ON THIS DOCUMENT
1.1 Function
The present instruction manual provides information on installation, connection and
safe use for the following articles: FC •78, FD •78, FL •78, FP •78, FC •79, FD •79,
FL •79, FP •79, FC •80, FD •80, FL •80, FC •83, FD •83, FL •83, FC •84, FD •84,
FL •84.
1.2 Target audience
The operations described in this instruction manual must be carried out by qualified
personnel only, who are fully capable of understanding them, and with the technical
qualifications required for operating the machines and plants in which the safety de-
vices are to be installed.
1.3 Application field
These instructions apply exclusively to the products listed in paragraph Function, and
their accessories.
1.4 Original instructions
The Italian language version is the original set of instructions for the device. Versions
provided in other languages are translations of the original instructions.
2 SYMBOLS USED
This symbol indicates any relevant additional information.
Attention: Any failure to observe this warning note can cause damage or mal-
function, including possible loss of the safety function.
3 DESCRIPTION
3.1 Device description
The rope safety switches discussed in these usage instructions are safety devices
designed and implemented for installation to automatic machines (typically conveyor
belts or very long machines), where a simple stop function is required (in the versions
without reset device, articles F• •79, F• •80), or an emergency stop function is required
(in the versions with reset device, articles F• •78, F• •83, F• •84) from any position and
on any manual intervention on the rope.
The devices are equipped with an integrated self-monitoring function, which is able to
signal – by opening electrical contacts – any rope loosening or breakage.
Attention: To implement emergency stop functions, as specified in standard
EN ISO 13850, use only series F• •78, F• •83 and F• •84 devices, as they are equipped
with a latching mechanism that retains the electric contacts in the open position, until
the operator intervenes on the reset device manually.
3.2 Intended use of the device
- The device described in this manual is designed to be applied on industrial machines
for implementation of the simple stop function (articles F• •79, F• •80), or of the
emergency stop function (articles F• •78, F• •83, F• •84).
- The direct sale of this device to the public is prohibited. Installation and use must be
carried out by qualified personnel only.
- The use of the device for purposes other than those specified in this manual is
prohibited.
- Any use other than as expressly specified in this manual shall be considered
unintended by the manufacturer.
- Also considered unintended use:
a) using the device after having made structural, technical, or electrical modifications
to it;
b) using the product in a field of application other than as described in paragraph
TEChNICAL DATA.
4 INSTALLATION INSTRUCTIONS
Attention: Installing a protective device is not sufficient to ensure operator safety
or compliance with machine safety standards or directives. Before installing a protec-
tive device, perform a specific risk analysis in accordance with the key health and
safety requirements in the Machinery Directive. The manufacturer guarantees only
the safe functioning of the product to which this instruction manual refers, and not the
functional safety of the entire machine or entire plant.
4.1 Head orientation
If necessary, it is possible to adjust the position of the head, in 90° rotations, at the
machine, in order to turn the device to the position best suited to the application.
Remove the 4 screws from the top part of the head, and rotate the head to the desired
position, without physically separating the head from the body of the device. Tighten
the 4 screws to a torque from 0.8 to 1.2 Nm.
Attention: During this operation, take extra care not to introduce foreign particles
into the device; such as dust, liquids, or pollutants of any type. Should the head
separate fully from the body when rotated, do not proceed with the device installation,
as certain internal parts could be unseated, and correct device function cannot be
ensured.
4.2 Fixing of the device
Attention: Always affix the device with at least 2 M5 screws. Always use screws
with a resistance class of 4.6 or higher, and flat seating heads. Install the screws with
medium resistance thread lock, and a number of threads engaged equal to or greater
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than the screw diameter. The device must never be fixed with less than 2 screws. The
tightening torque of the screws must be between 2 and 3 Nm.
4.3 Rope installation
Attention: we recommend exclusive use of original accessories (ropes, pulleys,
terminals, jumpers, and stay bolts) to ensure the stated device performance.
Follow the below procedure to connect the actuation rope.
1) Install, to the first end of the rope, a VF AF‑MR5 terminal; or alternatively, a VF M870
terminal in conjunction with a VF C870 jumper.
Terminal
Article VF AF‑MR5
2) At the other end of the rope, install one of the following stay bolts: VF AF‑TR5,
VF AF‑TR8, VF AF‑TR2X, VF T870. If you are using a VF AF‑TR2X or VF T870 stay
bolt, attach the rope to the stay bolt with a VF AF‑MR5 terminal or, alternatively, with
a VF M870 terminal in conjunction with a VF C870 jumper.
Stay bolt
Stay bolt
Article VF AF‑TR5
Article VF AF‑TR8
3) If the rope is longer than 6 m (for articles with longitudinal head, F• •78, F• •79)
or 16 m (for articles with transversal head F• •80, F• •83, F• •84), you must use
VF AF‑CA5 or VF AF‑CA10 pulleys, to support the weight of the rope. The distance
between the pulleys, or between the pulley and the switch, must never exceed 3 m (for
articles with longitudinal head) or 5 m (for articles with transversal head).
Pulley
Article VF AF‑CA5
4) Tension the rope connected to the switch, by screwing or unscrewing the threaded
stem of the stay bolt, until the end of the black indicator (1) on the head of the device
reaches half of the green ring (2) - see Figure.
5) Lock the stay bolt in position by tightening the corresponding lock nut (where
present).
6) For articles with reset device, pull the blue knob so that the electrical safety contacts
close. Below the knob, a steady green ring should appear, to indicate correct reset
device state.
When first installed, the rope tends to lengthen as a result of its natural
detensioning; we therefore advise you to check the rope for correct tension, 24 hours
after completing installation.
4.4 Installation examples
Attention: Never exceed the maximum rope lengths shown in the following
examples, under any circumstances.
4.4.1 Installation examples for switches with longitudinal head
Example A
VF AF-CA5
VF AF-TR5
2 ÷ 3 m
2 ÷ 3 m
2 ÷ 3 m
24 m MAX
Example B
VF AF-CA5
VF AF-TR5
2 ÷ 3 m
2 ÷ 3 m
2 ÷ 3 m
18 m MAX
Example C
VF AF-CA5
VF F05
VF AF-TR5
2 ÷ 3 m
2 ÷ 3 m
12 m MAX
Example D
VF AF-TR5
VF F05
VF AF-MR5
6 m MAX
4/21
info@pizzato.com
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Terminal
Jumper
Article VF M870
Article VF C870
Stay bolt
Article VF AF‑TR2X
Pulley
Article VF AF-CA10
1
2
VF F05
VF AF-MR5
2 ÷ 3 m
2 ÷ 3 m
2 ÷ 3 m
2 ÷ 3 m
VF F05
VF AF-MR5
VF AF-ME78
2 ÷ 3 m
2 ÷ 3 m
2 ÷ 3 m
VF AF-IFGR03
VF AF-MR5
2 ÷ 3 m
VF AF-MR5
Example E
3 m max
Stay bolt
Article VF T870
VF AF-CA10
VF F05
VF AF-TR8
3 m max
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