3
Series 70 Servo Pro
Operation and Maintenance Manual
WARNING
The actuator must only be installed, commissioned,
operated and repaired by qualified personnel.
The actuator is designed for installation inside
the Bray S70 Electric Actuator, and to position an
industrial quarter-turn valve. It must be installed
according to its intended purpose.
The Servo Pro controls the movement of an electric
actuator that generates large mechanical forces.
To prevent injury, installation, commissioning,
operation and maintenance must be carried out
under strict observation of the applicable safety
regulations.
The specifications of the examination certificate
valid in the applicable country must be observed.
This includes the actuator in which the Servo Pro
is installed.
Reference is specifically made here to observe
the applicable safety regulations for actuators
installed in potentially explosive (hazardous)
locations. This includes the actuator in which the
Servo Pro is installed.
Verify that the main electric power supplied to
the Servo Pro is compliant with the specifications
on the product label and the specifications in the
examination certificate valid in the applicable
country.
Avoid electrostatic discharges within hazardous
areas.
The housings and external connections on the
actuators (in which the Servo Pro is installed)
are designed for use in potentially explosive
(hazardous) locations and may only be opened
after all electrical power to the actuator has
been removed.
Correct and safe operation of the Servo Pro is
dependent upon proper transport, storage and
installation in addition to proper operation and
maintenance.
1.3 Intended Use
The actuator described in this guide has been
developed, manufactured, tested and documented
with all relevant safety standards taken into account.
If the handling rules and safety information
for configuration, calibration, installation and
maintenance are observed, and the product is used
for its intended purpose, there is normally no danger
with regard to material damage or personnel health.
1.4 Warranty Information
The content of this document is not part of, and
does not modify, a previous or current agreement,
undertaking or legal relationship. Bray Controls is
bound solely by the contract of sale, which also
contains the complete and exclusive warranty.
The contractual warranty conditions are neither
extended nor restricted by this document.
2.0 Description of Operation
The Bray Series 70 Servo Pro provides complete
control and monitoring of the Bray S70 Electric
Actuator.
Figure 1: S70 Servo Pro
Revision F or Higher
The basic function of the Servo Pro is to position
the S70 Actuator in response to a command signal
from a process controller. The process controller
contains a desired process setpoint entered by the
user, and continually monitors the process variable
(such as flow rate, tank level, etc.) through some
type of sensor. Varying the command signal to the
Servo Pro will cause the actuator to change
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