Festo SPAU Series, Operating Instructions Manual

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Auto difference monitoring
With the auto difference monitoring function, a change in pressure from a refer­
ence value is detected. As a result, a maximum permissible pressure drop can be
monitored, for example.
If the input variable is in the work range between [SP.Hi] and [SP.Lo] and is con­
stant, its value is set automatically as the reference value P
Ref
. The output
switches.
A constant input variable is present if the signal change is less than 0.2 % FS dur­
ing the set observation time [t.obs].
The parameter [d.SP] establishes the permissible deviation of pressure from the
reference value and thus the monitoring range. If pressure exceeds or falls below
[d.SP], the output switches back.
Function NO (normally open) NC (normally closed)
Switching function:
– 2 switching points (SP.Lo,
SP.Hi) for setting the valid
work range
TEACH mode
1)
:
– 2 teach-in points (TP1, TP2)
– TP1 = SP.Lo, TP2 = SP.Hi
SP.Lo P
Ref
SP.Hi
d.SP
1
0
Out
p
1
SP.Lo P
Ref
SP.Hi
d.SP
0
Out
p
1) SP.Lo = smaller pressure value, SP.Hi = larger pressure value, independent of the Teach sequence
Fig. 6
3 Requirements for product use
Only use the product in original status, without any unauthorised modifications.
The product is intended for use in industrial environments. Measures may need
to be implemented in residential areas for radio interference suppression.
Take into consideration the ambient conditions at the location of use.
Operate the product only with compressed air of the specified air quality class
(
è
Technical data).
Remove all transport packaging. The material used in the packaging has been
specifically chosen for its recyclability.
Accessories
è
www.festo.com/catalogue.
Range of applications and certifications
In combination with the UL mark on the product, the information included in this
section is also applicable for compliance with the certification requirements of
Underwriters Laboratories Inc. (UL) for USA and Canada. Observe the following
English-language remarks from UL:
UL approval information
Product category code QUYX, QUYX7
File number E322346
Considered standards UL 61010­1, CAN/CSA­C22.2 No. 61010­1
UL mark
Fig. 7
Only for connection to an NEC/CEC Class 2 supply.
Raccorder uniquement a un circuit NEC/CEC Classe 2.
Electrical and environmental ratings
Input voltage max. 30 V DC, Class 2
Input current max. 0.24 A
Power max. 7.2 W
Pressure differential max. 1.6 MPa
Ambient temperature max. 50 °C /122 °F
Pollution degree 3
Humidity range 93 %
Only for indoor use.
Altitude up to 2000 m. Altitude up to 2000 m or above 2000 m if specified by the manufacturer.
Fig. 8
Warning
Unit shall be supplied by a power source which complies with the requirements
of a limited­energy circuit in accordance with IEC/EN/UL/CSA 61010­1 or a Lim­
ited Power Source (LPS) in accordance with IEC/EN/UL/CSA 60950­1 or IEC/EN/
UL/CSA 62368­1 or a Class 2 circuit in accordance with NEC or CEC.
4 Installation
Note
Installation and commissioning are to be carried out only by qualified personnel
in accordance with the operating instructions.
4.1 Mechanical and pneumatic
Note
An unfavourable mounting position can impair the function of the product.
Mount the sensor so that no condensation from the compressed air lines can
gather in the device.
Install the sensor so that it cannot be heated above the maximum permissible
operating temperature (plan for convection possibilities).
SPAU-...-T
– Seal connecting thread.
Max. 10 Nm Max. 7 Nm
For example, with double
nipple
x
”
Fig. 9 Fig. 10
SPAU-...-H SPAU-...-A
– Mounting bracket hole pattern
è
Fig. 29
M3
max. 0.5 Nm
Fig. 11 Fig. 12
SPAU-...-W
– Wall mounting hole pattern
è
Fig. 30
1. 2.
Fig. 13
SPAU-...-F
– Size of the front panel cut-out in mm
è
Fig. 14
– Guide sensor from the front into the cut-out on the front panel.
– Attach the clamping plate and press until the fastening slide clips in.
34 ±
0.3
61 ±
0.3
M3
max. 0.7 Nm
s
s < 2 mm: remove 1 washer
s < 1 mm: remove 2 washers
Fig. 14 Fig. 15