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MOTOR OVER TEMPERATURE SENSOR
It is strongly recommended that the motor over-temperature sensor is connected to the drive amplifier or
servo controller at all times in order to reduce the risk of damage to the motor due to excessive temperatures.
Protection is provided by three, positive temperature coefficient (PTC) thermistors embedded in the motor phases. As
the motor phase temperature approaches 100°C, the PTC thermistors exhibit a sharp increase in electrical resistance.
This change in resistance can be detected by circuitry within the drive amplifier or servo controller and used to reduce
or disable the output of the drive amplifier in order to protect the motor.
SPECIFICATION VALUE UNITS
Resistance in the temperature range
-20
o
C to +70
o
C
60 to 750 Ohms
Resistance at 85
o
C 1650 Ohms
Resistance at 95
o
C <3990 Ohms
Resistance at 105
o
C <12000 Ohms
Response time for a 20
o
C to 100
o
C
temperature step to register a trip
3 s
Maximum continuous voltage 30 Vd.c.
CABLE
The XTA has two separate cables providing connections for motor power and position sensor. The standard cables
supplied are flexible but are not intended for continuous flex or energy chain applications.
SPECIFICATION POWER SENSOR
Overall diameter (nominal) 8.2 mm 7.8 mm
Outer jacket material PVC PVC
Number of conductors 4 4 x twisted pair
Size of conductors 1.5mm
2
(16 AWG) 0.14mm
2
(26 AWG)
Screened / Unscreened Screened Screened
Operating voltage 600 V
rms
300 V
rms
Minimum bending radius-fixed routing 41 mm 40 mm
Operating temperature-fixed routing -40
o
C to + 90
o
C -40
o
C to +70
o
C
UL style 2586 105
o
C 600 V 21083 90
o
C 300 V
As an option, flexible cables are available that are suitable for continuous flex or energy chain applications. These
cables are standard on the XTB.
SPECIFICATION POWER SENSOR
Overall diameter (nominal) 7.6 mm 7.8 mm
Outer jacket material PUR PVC
Number of conductors 4 4 x twisted pair
Size of conductors 1.5mm
2
(16 AWG) 0.14mm
2
(26 AWG)
Screened / Unscreened Screened Screened
Operating voltage 300 V
rms
300 V
rms
Minimum bending radius-flexible routing 38 mm 58 mm
Operating temperature-flexible routing -40
o
C to + 80
o
C +5
o
C to +70
o
C
UL style 20233 80
o
C 300V 21083 90
o
C 300 V
Page 22
Appendices ServoTube 38 Installation Guide