Pizzato Elettrica Srl
via Torino, 1
36063 MAROSTICA (VI)
ITALY
e-mail: [email protected]
web site: www.pizzato.com
Phone: +39.0424.470.930
ZE FOG43A19-EU
4/12
1 INFORMATION ON THIS DOCUMENT
1.1 Function
The present operating instructions provide information on installation, connection and
safe use for the following articles:
CS AR-51••••.
1.2 Target audience
The operations described in these operating instructions must be carried out by quali-
fied personnel only, who are fully capable of understanding them, and with the techni-
cal qualifications required for operating the machines and plants in which the safety
devices 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 safety device described in this manual is defined according to the Machinery
Directive 2006/42/EC as logic component for safety functions.
The safety modules to which these usage instructions refer are devices specifically
designed and manufactured for use on industrial machines. Upon opening of at least
one channel, the safety function ensures that the safety relays must open their output
contacts within the defined reaction time. The safety outputs of the module are ena-
bled only if the channels CH1 and CH2 are consistently closed and after activating
the START signal.
When using safety mats and safety bumpers, a short circuit between the two channels
must cause the safety contacts to switch off within the set reaction time.
3.2 Device functions
This device is suitable for the following applications: as a module for emergency
stop, for end position monitoring with movable guards, safety mats and safety bump-
ers with 4-wire technology, in safety circuits up to category 4 acc. to EN ISO 13849-1,
up to SIL 3 acc. to EN 62061 and up to PL e acc. to EN ISO 13849-1.
- Input with 2 channels.
- Output contacts: 2 NO safety contacts.
- Choice between automatic start, manual start or monitored start.
With reference to the "automatic" operating mode, consider RES 1.2.3 of the
Machinery Directive 2006/42/EC: "For machinery functioning in automatic mode, the
starting of the machinery, restarting after a stoppage, or a change in operating condi-
tions may be possible without intervention, provided this does not lead to a hazardous
situation".
- Connection of input channels of opposite potentials.
- Short circuit detection function of the control elements by means of safety system
with self-monitoring and redundancy.
- LED indicators for the switching state of channels 1 and 2, for the supply voltage and
for the external short circuit between the channels.
- Without muting input, no bridging of the safety function.
- In the event of a failure, the device switches to a safe state and deactivates the
safety output.
- Screw terminals or plug-in terminals with screw connections or spring terminals (de-
pending on the model).
- Snap-mounting on DIN rails.
3.3 Intended use of the device
- The device described in these operating instructions is designed to be applied on
industrial machines.
- 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 these operating
instructions is prohibited.
- Any use other than as expressly specified in these operating instructions 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 OPERATION
4.1 Function diagrams
Automatic
start:
A1/A2
S31/S32
S21/S22
13/14, 23/24
t
C
t
A
t
R1
t
R1
t
C
t
A
t
R
t
A
Monitored
start:
A1/A2
S31/S32
S21/S22
S33/S34 (START)
13/14, 23/24
t
A
t
R1
t
R1
t
A
t
R
t
MIN
t
A
Manual start:
A1/A2
S31/S32
S21/S22
S33/S34 (START)
13/14, 23/24
t
A
t
R1
t
R1
t
A
t
R
t
MIN
Legend:
t
MIN
:
Min. duration of start impulse
t
C
:
Simultaneity time
t
A
:
Response time
t
R1
:
Release time
t
R
:
Release time in absence of power
supply
4.2 Wiring diagrams
Safety mats and safety bumpers
Emergency stop circuits
Input configuration with manual start
2 channels
Input configuration with manual start
2 channels
S21
S22
S37
S33
S31
S34
PE
S32
CS AR-51
A1
A2
L / +
N / -
S21
S22
S37
S33
S31
S34
PE
S32
CS AR-51
A1
A2
L / +
N / -
S33
S34
S34
S33
Automatic start
With regard to the indicated diagrams, short-circuit the start
button between the S33 and S34 terminals in order to acti-
vate the automatic start module.
S33
S34
S37
S33
S34
S37
Monitored start
With regard to the indicated diagrams, establish the con-
nection between the S34 and S37 terminals in order to ac-
tivate the monitored start module.
Movable guard monitoring
The safety module can monitor emergency stop circuits
and control circuits for movable guards. Replace the
emergency stop contacts with the switch contacts.
4.3 PE terminal connection
The PE terminal has to be connected to the equipotential circuit of machine protection
if it is necessary.
This connection is made for functional reason, to reduce effects of an insulation fault
on the machine operation.
In particular, ground faults in control circuits must not cause unwanted start-up or
dangerous movements or prevent the machine from stopping.
4.4 Function of “EXT. FAULT” LED
When a pressure is exerted on the surface of a safety bumper or safety mat, a short-
circuit occurs between the two conductive elements, which constitute the apparatus
and can be connected to the input channels of the safety module.
The signal thereby generated causes the EXT.FAULT LED to illuminate and signal the
short-circuit and the opening of the output contacts, resulting in the blocking of the
control circuit and causing the machine to switch to the safety setting. The EXT. FAULT
LED does not switch on if the wires or internal connections of the safety mat or safety
bumper are interrupted.
