BEKA BA568E, Manual

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To adjust an alarm setpoint select
5P1
x or
5P2
x and
press
(
which will reveal the current setting. The
flashing digit of the setpoint may be adjusted using
the
&
or
*
push button and the
(
button to
move control to the next digit. When the required
setpoint has been entered, pressing
)
will return
the display to the
5P1
x or
5P2
x
2
prompt from which
the other setpoint may be selected, or the instrument
may be returned to the display mode by pressing
)
again.
Note: Direct access to the alarm setpoints from the
display mode is only available when the
AC5P
menu is enabled - see section 9.3.12
9.4 Display backlight
The BA568E Counter can be supplied with a factory
fitted backlight that produce green illumination
enhancing display contrast and enabling it to be read
at night or in poor lighting conditions. The backlight
is internally powered from the instrument power
supply so that no additional wiring is required, but
the supply current increases as shown below.
BA568E
Maximum
current
consumption
10mA
Additional for backlight 16mA
Addition with terminals 3 & 4 linked 6mA
Addition with terminals 7 & 8 linked 6mA
_____
Total current 38mA max
9.5 4/20mA output
The BA568E Counter can be supplied with an
optional factory fitted galvanically isolated 4/20mA
output which may be configured to represent the rate
or total display.
9.5.1 System design
The BA568E Counter's optional 4/20mA output is a
passive current sink i.e. not powered, but it is totally
isolated from all other Counter circuits. It is
effectively a 2-wire 4/20mA transmitter requiring a
minimum supply of 5V with its current being
controlled by the BA568E Counter. Terminals C1
and C2 may be connected to any other instrument
with a 4/20mA transmitter input which can supply at
least 5V. Terminals C2 and C4 are internally linked
and may be used for joining a return 4/20mA wire.
Fig 15 Application of 4/20mA output
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