SERIES 70 ELECTRIC ACTUATOR
Installation, Operation, and Maintenance Manual
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The Information contained herein shall not be copied, transferred, conveyed, or displayed in any manner
that would violate its proprietary nature without the express written permission of Bray International, Inc.
10.5 Battery Backup Unit
Bray offers a factory installable Battery Backup Unit (BBU) for the 24 V Series 70
electric actuator.
In the event of power failure, the BBU will switch the actuator to battery power to
reach its fail position. After the actuator has reached its fail position, the BBU goes
to ‘Standby Mode’ until external power is restored.
Once external power has been restored, the actuator returns to the position
corresponding to the control signal present.
LED Indicator
Figure 18.
S70 with Battery Backup Unit.
Battery Backup Unit is available as a factory installable option. For more
information, please refer to the S70 24V Actuator with BBU Manual. This manual is
available on the company website (bray.com).
10.6 Indication of Remote Control
Bray offers two field or factory installable kits to indicate if a process controller has
remote control of the Series 70 actuator. Remote control of the actuator can be
interrupted if the actuator handwheel has been left engaged or if a local control
station has been switched out of remote mode.
A dry contact (voltage free) mechanical switch provides indication if the handwheel
is engaged. Alternatively, an additional dry contact (voltage free) mechanical switch
can be placed in Local Control Station to provided indication if the local control
station is switched out of remote mode. Both kits can be installed and wired in
series to provide dual indication. Dual indication wiring is meant to indicate that
remote control has been interrupted and does not distinguish between modes of
interruption.
NOTE:
> Factory will need wiring diagram drawing number and model of the existing unit
if it is to be retrofitted with a Remote Control Indication kit. New wiring diagram
will be provided based upon this information.
> Some configurations may limit use of remote control indication kits receptacles
due to number of wires entering through the conduit.
