Infranor CD1-k, Installation Manual

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32
Chapter 4 – Connections
CD1-k- Installation Guide
The application requires an Heidenhain linear encoder supplied by 5 V ±5 % / 300mA with 25 m cable length.
Min. power voltage: 5 V ±5 %
D
∆
U
max
= 0.25 V D . Min. cross section: S = 1.2 mm².
Such a large cross section is difficult to obtain, so the user can:
ƒ either connect the SENSE feedback signal lines with power supply lines, while the needed wires cross section
will be the half (0.6 mm²),
ƒ or use the same encoder type but the version which allows its power supply voltage from 3.6 V to 5.25V /
300mA. Min power voltage 3.6V D
∆
U
max
= 1.4V D . Min. cross section : S = 0.21mm²
The cables of brake equipped motors must also have their brake cables shielded in order to be EMC compliant.
Maximum cable length: - resolver:
≤
100 m
- encoder:
≤
25 m
- motor: ≤ 25 m.
For motor cable length > 25 m, we advise:
- to use the maximum cable section allowed by the connectors,
- to mount a reactance with an inductive value between 1% and 3% of the motor inductive value. The reactance
inductive value must be taken into account in the calculation of the current loops. The current rating of the
reactance must be equal to or higher than the amplifier rating.
The reactance must be mounted at the amplifier output.
Due to the use of a reactance, a shielded cable is not mandatory anymore.
A more complex sinus filter type FN510 by Schaffner may also be mounted instead of the reactance.
UNDESIRABLE EFFECTS OF MOTOR CABLES LONGER THAN 25 m:
- Heating of the power module, the motor and the cable.
- High overvoltages on the motor windings involving a shortening of their life time.
The reactance reduces the undesirable effects on motor and amplifier but it may be quite heated. This requires an
appropriate fan.
2.5 - SERIAL LINK AND CAN COMMUNICATION CABLES
Serial link and CAN communication cables must also be shielded according to the shield connection
recommendations above.
2.6 - CONNECTION CABLES OF THE BRAKING RESISTOR
The connection cable to the braking resistor housing must bear the high voltage and temperature of 600 V and
105° C.
Recommended cable: UL1015 gauge 14.
Fastening torque on the connector of the braking resistor housing: dp = 0.9 Nm.
!
CAUTION !
Control cables (resolver, serial link, CAN) and power cables must be connected and disconnected
with the amplifier OFF.
Recall:
The power voltage may remain several minutes on the capacitors terminals. A contact under high
voltage may involve severe physical damage.