6.2.4 Conductor cross-sections
Observe the technical data for connection cables ð p. 41.
Following EN 60204 (for AWG: table 310-16 of the NEC 60°C or 75°C column), we recommend for
single-axis systems:
AC connection
25 mm² (2 awg), shielded between filter and amplifier, 600V, 80°C
(176°F)
DC bus link 25 mm² (2 awg), shielded for lengths > 20 cm, 600V, 80°C (176°F)
Motor cables
ð p.41, cross section see manual of the used motor series,
capacitance <250pF/m, 600V, 80°C (176°F)
Resolver, thermal control
4x2x0.25 mm² (22awg) twisted pairs, shielded, max.100m,
capacitance <120pF/m
Encoder, thermal control
7x2x0,25 mm² (22awg) twisted pairs, shielded, max.50m,
capacitance <120pF/m
Setpoints, monitors, AGND 0.25 mm² (22awg) twisted pairs, shielded
Control signals, BTB, DGND 0.5 mm² (20 awg)
Holding brake (motor)
min. 1.5 mm² (14 awg), 600V, 80°C (176°F), shielded,
check voltage drop
+24 V / XGND
max. 2.5 mm² (12 awg), check voltage drop
Brake resistor ð p.41, min. 10 mm² (6 awg), shielded, 1000V, 80°C (176°F)
For multi-axis systems, please note the special operating conditions in your installation
To reach the max. permitted cable length, observe cable requirements ð p. 41.
* Kollmorgen North America delivers cables up to 39m length.
* Kollmorgen Europe delivers cables up to the maximum length.
6.3 LED display
A 3-character LED display shows the amplifier status after switching on the 24V supply
(ð p.93). During operation and parameter setting of the amplifier via the keys on the front panel, the
parameter and function numbers (ð p.93) are displayed, as well as the numbers of any errors
which occur (ð p.94).
6.4 Grounding system
AGND — ground for analog inputs/outputs, internal analog/µC ground
DGND — ground for digital inputs/outputs, optically isolated
XGND — ground for external 24V aux. voltage, optically and inductively isolated
PGND — ground for encoder emulation, RS232, CAN, PROFIBUS, optically isolated
The potential isolation is shown in the block diagram (ð p. 43).
SERVOSTAR
®
640/670 Instructions Manual 23
Kollmorgen
12/2010 Technical description
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