BEKA BA377E-SS, Manual

Page: 17 / 65

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4. INSTALLATION
4.1 Location
The BA377E-SS has a stainless steel case with a
10mm thick toughened glass window. The case
provides 7J and the window 4J front of panel impact
protection. The captive silicone gasket, which seals
the joint between the instrument and the panel
enclosure, ensures IP66 front of panel ingress
protection. The rear of the Timer or Clock has IP20
protection.
Although the front of the BA377E-SS has IP66
protection, it should be shielded from continuous
direct sunlight and severe weather conditions.
The BA377E-SS may be located in Zone 0, 1 or 2
providing that the operating temperature is between
–40°C and +60°C and the installation complies with
the certification requirements.
Installation in Ex e and Ex p panel enclosures are
described in sections 3.3.1 and 3.3.2.
Fig 11 show the overall dimensions of the
BA377E-SS together with the recommended panel
enclosure cut-out dimensions and Fig 13 shows the
terminal locations.
4.2 Installation Procedure
a. Cut the aperture specified in Fig 11 in the panel
enclosure. Ensure that the edges of aperture are
de-burred.
b. Inspect the Timer or Clock's captive gasket and
ensure that it is not damaged before inserting the
Timer or Clock 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
Timer or Clock 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 as shown in Fig 13. To simplify
installation, the terminals are removable so that
wiring can be completed before the instrument is
installed. Cables should be mechanically secured
to ensure terminals are not damaged by 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 11 Dimensions