Bray 70 Series SERVO PRO - Manual (Page 8)

6
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
2.3 c
onfiguration
s
WitcH
f
unction
d
escriPtion
Command Signal Input – the signal from the process
controller that represents the desired actuator position.
Feedback Output Signal – the signal from the Servo
Pro that represents the current actuator position.
Forward Acting – the actuator will move toward the open
direction with an increase in command signal.
Reverse Acting – the actuator will move toward the close
direction with an increase in command signal.
Fail Enable – the actuator will move to a position selected
by the user upon loss of command signal.
NOTICE
The command signal is considered lost when it is below
the low limit of the selected range.
The command signal cannot be out of range when 0-5
VDC or 0-10 VDC are selected because 0 VDC is a
valid value.
The fail position will not be reached if command signal
AND electric power are both removed from the Servo
Pro. Electric power must be maintained in order to
move the motor in the actuator.
Fail in Last Position – The actuator will remain in the
position it reached when the command signal was lost.
Fail Close – The actuator will move to the fully closed
position when the command signal is lost.
Fail Open – The actuator will move to the fully open
position when the command signal is lost.
Torque Switch Enable – The actuator will respond to the
optional switches connected to the torque limit inputs. If
the open torque switch is activated (the switch has been
tripped by the torque switch cam) the actuator will not
move any closer to the fully open position. If the close
torque switch is activated (the switch has been tripped by
the close torque switch cam) the actuator will not move
any closer to the fully closed position.
NOTICE
If the Torque Switch Enabled option is selected, the
actuator must be equipped with properly set torque
switches wired to the Servo Pro. The absence of properly
set torque switches will prevent actuator movement in
one, or both, directions.
Torque Switch Disable – the Servo Pro will not respond
to any switches connected to the Torque Switch inputs.
This option should be used when the optional torque
switches are not installed in the actuator.
2.4 f
actory
d
efault
s
ettings for
s
erVo
P
ro
r
eV
f
Unless specified by the user, the configuration switches
on the Servo Pro Revision F are set to the following
default positions when shipped from the Bray factory:
Switch 1 – Off
Switch 2 – Off
Switch 3 - Off
Switch 4 - Off
Switch 5 - On
Switch 6 - Off
Switch 7 - Off
Switch 8 - On
Switch 9 - Off
Switch 10 - On
The factory default settings will place the Servo Pro
Revision F in the following configuration:
Command Signal - 4-20 mADC
Feedback Output Signal – 4-20 mADC
Forward Acting
Fail Enable
Fail Closed
Torque Switch Disable