MS(B)9-...-EX2
Service unit component/Service unit combination
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Deutschland
+49 711 347-0
www.festo.com
Addendum document | Operating conditions EX
8162180
2021-12c
[8162182]
Translation of the original instructions
© 2022 all rights reserved to Festo SE & Co. KG
1
Identification EX
Identification
II 3G
Ex nA IIC T5 X Gc
II 3D
Ex tc IIIC T95°C X Dc IP54
Tab. 1: Identification EX
2
Certified products
Type
Designation
Part number
MS9-EE
Electric on/off valve
562177
MS9-EM
Manual on/off valve
562178
MS9-FRM
Branching module
562534
MS9-LF
Filters
562532
MS9-LFM
Fine filter
552940
MS9-LFR
Filter regulator
562531
MS9-LFX
Active carbon filter
552942
MS9-LR
Pressure regulator
562530
MS9-LWS
Water separator
567857
Tab. 2: Certified products
3
Safety
3.1
Safety instructions
–
The device can be used under the stated operating conditions in zone 2, explo-
sive gas atmospheres, and in zone 22, explosive dust atmospheres.
–
The device with the lowest category determines the category of the entire
product for the operation of service unit combinations.
–
All work must be carried out outside of potentially explosive areas.
–
Only operate the device with a suitable operating medium
è
Technical data
–
The device is not intended for use with other fluids.
–
Use the device in its original status without any unauthorised modifications.
–
The device may only be used in the delivered configuration in a potentially
explosive atmosphere.
3.2
Intended use
Service unit components and service unit combinations are intended for use for
the preparation of compressed air.
3.3
Identification X: special conditions
–
Danger of electrostatic discharges.
–
When using devices with a condensate drain, make sure that the operating
medium has a pressure dew point
£
–10 °C.
–
Limit overvoltage to 140% of the maximum nominal voltage.
–
Do not disconnect when powered.
–
Use an additional strain relief for cables upstream of the plug.
–
Protect the device from mechanical impact.
–
Protect the device from UV radiation.
4
Function
Service unit components and service unit combinations include function for com-
pressed air preparation, e.g. filters or branching modules.
5
Commissioning
WARNING
The discharge of electrostatically charged parts can lead to ignitable sparks.
• Prevent electrostatic charging by taking appropriate installation and cleaning
measures.
• Include the device in the system’s potential equalisation.
• Closed-loop controller: do not remove the rotary knob during operation in a
potentially explosive atmosphere.
• Closed-loop controller: use the knurled nut only for installation with an
earthed mounting bracket. When using other mounting components, remove
the knurled nut.
NOTICE
Draw in compressed air outside of the explosive atmosphere.
NOTICE
Strong charge-generating processes can charge non-conductive layers and coat-
ings on metal surfaces.
NOTICE
Escaping exhaust air can swirl up dust and create an explosive dust atmosphere.
NOTICE
Particulate matter in the compressed air can cause electrostatic charges.
–
Observe the product labelling.
–
Make sure that the contact between the service unit components and the
sub-bases is electrically conductive.
–
Earth all service unit components and their combinations on the left or right
sub-base with the earthing screw.
–
Prevent draw-in of ambient air by preventing negative pressure in the devices.
6
Maintenance and care
•
Check the products regularly for correct functioning and service every
6 months.
7
Fault clearance
Malfunction
Remedy
Audible leakage at the connections
Check fittings of the connections.
Incomplete pressurisation of an output
Ensure constant pressure in the system.
Tab. 3: Fault clearance
The replacement of wearing parts and spare parts is possible in individual cases.
Repairs of this type must only be carried out by trained and authorised personnel.
•
Please contact your Festo technical consultant.
•
After assembly, check the electrical resistivity between the earthing screws on
the left-hand and right-hand sub-base
è
Technical data.
