Bray 70 Series SERVO PRO - Manual (Page 5)

3
BRAY 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
inpotentially explosive (hazardous) locations. This
includesthe actuator in which the Servo Pro is installed.
Verify that the main electric power supplied to the
ServoPro 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
additionto proper operation and maintenance.
1.3 i
ntended
u
se
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 W
arranty
i
nformation
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 d
escriPtion of
o
Peration
The Bray Series 70 Servo Pro provides complete control
and monitoring of the Bray S70 Electric Actuator.
f
igure
1: s70 s
erVo
P
ro
r
eVision
f
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
!