Bray 70 Series SERVO PRO - Manual (Page 17)

15
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
caution
Do not connect any high voltage power to the hand-
wheel switch terminals as damage could result.
Engaging the handwheel prevents the actuator motor
from becoming energized, but it does not remove electric
power from the Servo Pro. Exercise caution to avoid
personnel injury or damage to property.
5.1.5 t
raVel
l
imit
s
WitcH
t
erminals
The Servo Pro accepts signals from travel limit switches
installed in the actuator that indicate when the fully closed
and fully open positions are reached. When a travel limit
is reached, the Servo Pro will not power the actuator
motor any farther in that direction.
The wiring to the travel limit switch terminals is connected
at the factory and should not require any adjustment
by the customer. If a field repair is required,refer to the
wiring diagram to make sure the open limit switch is wired
between the OPEN LIMIT terminal and the COMMON
terminal, and the close limit switch is wired between the
CLOSE LIMIT terminal and the COMMON terminal.
Normal operation requires a closed contact between
OPEN LIMIT and COMMON, and between CLOSE LIMIT
and COMMON.
The travel switches are used during the calibration
routine to indicate the fully closed and fully open actuator
positions.
Refer to the actuator manual for information on adjusting
the travel limit switches.
notice
A travel switch that is broken, improperly wired,
improperly adjusted or missing from the actuator can
result in an open contact which will be interpreted by
the Servo Pro as the actuator reaching the travel limit.
Do not activate both travel switches simultaneously as
this will create an error condition. The actuator cannot
be fully open and fully closed at the same time.
caution
Do not connect any high voltage power to the travel
limit switch terminals as damage could result.
5.1.6 t
orQue
l
imit
s
WitcH
t
erminals
The Servo Pro accepts signals from optional torque limit
switches installed in the actuator that indicate when an
over-torque condition exists while the motor is moving
in the closed or open direction. When a torque limit is
reached, the Servo Pro will not power the actuator motor
any farther in that direction.
The wiring to the torque limit switch terminals is connected
at the factory and should not require any adjustment by the
customer. Torque switches cannot be added to actuators
in the field because factory calibration is required.
Normal operation requires a closed contact between the
TORQUE LIMIT OPEN and COMMON, and between the
TORQUE LIMIT CLOSE and COMMON.
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