18
Bettis Q-Series
Installation Guide
February 2017 DOC.IG.BQC44.1 Rev. 1
The pneumatic actuator part, together with the
pneumatic Module part of the Bettis Q-Series pneu-
matic actuators is a Group II category 2 equipment
and intended for use in areas in which explosive
atmospheres caused by mixtures of air and gases,
vapours, mists or by air/dusts are likely to occur.
Therefore it may be used in (ATEX) classified Zones
1, 2 (Gasses) and/or 21, 22 (Dust).
11.2.2 Special conditions for safe use
• The material for the Control Module housing is
an aluminum alloy. When the unit is used in a
potentionally explosive atmosphere, requiring
ATEX equipment category 1 G, the unit must be
installed in such a way, that even in the event of
rare incidents, an ignition source due to impact
or friction between the enclosure and iron/steel
is prevented.
• Only non-combustible fluids may be used in the
pneumatic circuit.
Note: the surface temperature of the module has
been determined without a dust layer.
• Potential electrostatic charging hazard, clean
only with a damp cloth - danger of propagating
discharge.
• The apparatus shall be installed in such a way
that the risk from electrostatic discharges and
propagating brush discharges caused by rapid
flow of dust is avoided.
• Precaution shall be taken to avoid danger of
ignition due to electrostatic charges on the
marking plate of the enclosure.
Table 11.4 QC44 Intrinsically Safe Entity
Parameters
Circuit Terminal
Ui
Ii
Pi
Ci
Li
Pilot
valve
8 - 9
28Vdc 300mA 1.6W
0
0
Feedback switches 1 & 2
M-
type
1 - 2 - 3,
4 - 5 - 6
30Vdc 300mA 1.2W
0
0
G-type
1 - 2 - 3,
4 - 5 - 6
30Vdc 100mA 1.2W
0
0
11.2.3 Dielectric strength
Control Module QC44 complies to the dielectric
strength requirement according IEC- 60079-11.
11.2 Product QC44.xP1*xx1
This section is about intrinsically safe connections
for the QC44 control module with the switch types
M and G where * is M or G
Fig 11.2 Product marking
ATEX Hazardous or Classified Location
0344
Certificate: Pending
II 1 G Ex ia IIC T4...T6
II 1 D Ex tD A20 T80°C
Hazardous or Classified Location
Intrinsically safe, Class I, II, III, Div. 1,
Groups ABCDEFG T4...T6, Type 4X
Ex ia IIC, T6, IP65
DIP A20 TA 80°C
Certificate: Pending
Temperature range :
T4...T6 @ Ta = -20°C...+50°C (-4°F...122°F)
11.2.1 ATEX Intended use
The Control Module QC44.xP1*xx1 of the Bettis
Q-Series pneumatic actuator is Group II category 1
equipment and intended for use in areas in which
explosive atmospheres caused by mixtures of air
and gases, vapours, mists or by air/dusts are likely
to occur.
Control Module
Cover
Terminals
Type Label
