BEKA BA317NE, Manual

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5. INSTALLATION
5.1 Location
When installed in a panel enclosure complying with
the requirements for Ex n protection as shown in
section 3.2 of this manual, the BA317NE may be
located in a Zone 2 hazardous area providing that the
operating temperature is between –40°C and +60°C
and the installation complies with the Tachometers
certification requirements. Certified Ex e panel
enclosures are frequently used as Ex n panel
enclosures.
The BA317NE Tachometer has a stainless steel
housings with a 7J front of panel impact resistance
incorporating a 10mm thick toughened glass window
which can withstand a 4J impact. This, together with
a captive silicone gasket which seals the joint
between the instrument and the panel, enclosure
provides IP66 ingress protection. The BA317NE has
IP20 rear protection.
Although the front of the BA317NE Tachometer has
IP66 protection, it should be shielded from continuous
direct sunlight and severe weather conditions.
Fig 6 shows the overall dimensions of the BA317NE
together with the recommended panel enclosure cut-
out dimensions.
5.2 Installation Procedure
a. Cut the aperture specified in Fig 6 into the panel
enclosure. Ensure that the edges of aperture are
de-burred.
b. Inspect the Tachometer's captive gasket and
ensure that it is not damaged before inserting it into
the panel enclosure aperture.
c. If the enclosure panel is less than 1.0mm thick, or is
non-metallic, an optional BEKA stainless steel
support plate should be slid over the rear of the
indicator before the panel clamps are fitted to
evenly distribute the clamping force and prevent the
enclosure panel being distorted or creeping.
d. Slide a panel clamp into the two grooves at each
corner of the indicator housing with the M3 stud
protruding through the hole at the rear of the clamp.
Fit the stainless steel spring washer over the stud
and secure with the stainless steel wing nut.
e. Evenly tighten the four clamps to secure the
instrument. The recommended minimum tightening
torque for each wing nut is 22cNm (1.95 lbf in).
f. Connect the panel enclosure wiring to the rear
terminal blocks. To simplify installation, the
terminals are removable so that wiring can be
completed before the instrument is installed. Wiring
should be supported to prevent damage resulting
from vibration.
g. Finally, fit a silicone rubber push-on cap to the end
of each M3 threaded rod.
Support panel wiring to prevent vibration damage
Note: Optional backlight is internally powered
Fig 6 BA317NE dimensions and terminals
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