Bray 70 Series - Manuel (Page 17)

Actionneur électrique BRAY série 70
Notice d’utilisation et d’entretien
15
m
odulating
C
onfiguration for
f
ail
o
pen or
c
lose
b
attery
b
ackup
u
nit
(bbu)
o
peration
If the external power fails, the actuator will switch to battery
power, send a signal to the Servo Pro and drive the actuator
to its fail-open or fail-close position.
The BBU has a 4.5 minute fail safe feature during which time
if the actuator does not reach its end of travel, the BBU will
shutdown until external power is reapplied. Once external
power is reapplied, there is a 10 second time delay before
the actuator goes to the position dictated by the control
signal. Every time external power is reestablished, the 4.5
minute timer is reset.
a
ffectS
o
n
S70 d
eSign
The BBU in no way modifies the basic operation of the
Servo Pro. Under normal operations it simply passes
power to operate the actuator and charge the batteries. In
the event of power failure the BBU switches to the battery
and supplies power to the Servo and fails open or close
depending on the BBU configuration. In order to prevent
battery discharge the unit shuts itself off after 4.5 minutes.
Battery condition is checked hourly. The charging circuit is
also temperature regulated to prevent over heating or over
charging the batteries.
f
ail
o
Pen
o
r
c
loSe
c
onfiguration Fail Open or Fail
Close is determined by the wiring of the M and N terminal
block to the Servo Pro mounted inside the S70 Actuator.
f
ail
c
loSe Wire terminal M on the terminal block to the
Close terminal block on the Servo Pro’s Control Box Input.
Refer to Figure 1 for wiring details.
f
ail
o
Pen Wire terminal M on the terminal block to the
Open terminal block on the Servo Pro’s Control Box Input.
Refer to Figure 2 for wiring details.
o
n
/o
ff
c
onfiguration for
f
ail
o
Pen or
c
loSe
b
attery
b
ackuP
u
nit
(bbu)
o
Peration
If the external power fails, the actuator will switch to battery
power, send a signal to the Servo Pro and drive the actuator to
its fail-open or fail-close position. The BBU has a 4.5 minute
fail safe feature during which time if the actuator does not
reach its end of travel, the BBU will shutdown until external
power is reapplied. Once external power is reapplied, there
is a 10 second time delay before the actuator goes to the
position dictated by the control signal. Every time external
power is reestablished, the 4.5 minute timer is reset.
Figure 1
Figure 2