Eltorque QT Series - Page 26

Product Description
Page 26 of 86
User Manual QT250 and QT800, ID 2021 2.0 July 2018
Table 6: Cable requirements and recommendations for CANopen system
Cable parameter
Cable requirements and recommendations
Number of conductors
1 (GND) + twisted pair for CAN_H and CAN_L signals
Length related
resistance / Cross
section
Length related resistance;
typical 70 mΩ/m Max 100 m/m
70 mΩ/ 3ft 3.37 in Max 100 m/3ft 3.37 in
Normally equivalent to 0.5–1.5 mm
2
/0.02 – 0.06 in
2
Cable length (affects
communication speed)
Maximum 500 m/1650 ft.
Shield
EMC glands are not mandatory but is recommended in case
the actuator is placed in conjunction with equipment
emitting high levels of disturbances.
Termination resistor
Nominal 120 Ω Both ends of the signal loop must have the
correct impedance. Use the internal resistor by setting the
terminal jumper in position ON, see Figure 26: CANopen
connection interface terminals on page 40.
For the analog interface, both the input and the outputs are passive. Analog has
two outputs. One Alarm output and one Position output (4 to 20 mA) (see Table
7 for details).
Table 7: Relay outputs – analog interfaces
Function
Value
Rated voltage
24 VAC/VDC
Max. switching voltage
24 VAC/VDC
Rated current
1A
Limiting continuous current
1A
Breaking capacity
Max. 48 VA (1A)
For the digital interface, the digital outputs are passive, and the digital inputs are
active with a 5 V/20 mA rating. The digital output must be powered (see Table 8
for details).
Table 8: Relay outputs – digital interfaces
Function
Value
Rated voltage
48V AC/VDC
Max. switching voltage
48V AC/VDC
Rated current
1A
Limiting continuous current
1A
Breaking capacity
Max. 48 VA (1A)