7
Uo
=
30V dc
Io
=
159mA
Po
=
0.8W
The maximum permitted cable parameters for the
loop should be calculated by subtracting Ci & Li for
the BA405C with a loop powered backlight from
the cable parameters specified on the Zener
barrier or galvanic isolator certificate.
Inclusion of the loop powered backlight increases
the minimum operating voltage of the BA405C to
10V
5.
INSTALLATION
5.1
Location
The BA405C is housed in a robust aluminium
enclosure with a polyester front panel and a Noryl
bezel. The front panel provides IP65 protection
and a gasket seals the joint between the
instrument and the panel. The BA405C may be
installed in any panel providing the environmental
limits shown in the specification are not exceeded.
The front of the instrument should not be cleaned
with, or exposed to solvents.
Please refer to BEKA associates if high vibration is
anticipated.
Fig 6 shows the enclosure dimensions and the
recommended panel cut-out sizes.
5.2
Installation Procedure
a.
Insert the BA405C set point station into the
panel aperture from the front. Ensure that
the gasket is correctly positioned under the
bezel.
b.
Fix two panel mounting clips to opposite
sides of the instrument and tighten until the
indicator is secured as shown in Fig 7.
c.
Connect the panel wiring to the rear terminal
block as shown in Fig 6. To simplify
installation, the terminals are removable so
that the panel wiring can be completed
before the instrument is installed.
5.3
EMC
The BA405C complies with the requirements of the
European EMC Directive. For specified immunity
all wiring should be in screened twisted pairs with
the screen earthed within the safe area. The
enclosure may be earthed locally by securing a tag
under one of the rear panel corner fixing screws,
Fig 6 BA405C Dimensions
Fig 7 Fitting panel mounting clips
