Kollmorgen
Mounting and Wiring
SILVER
LINE
®
Product Family
4-4
4.7.2.1 Providing DC Bus Using an SPS/R
Refer to Figure 3-1 (page 3-2). Note that SPS/Rs are unregulated supplies and provide a nominal voltage of
75% of the rated voltage. This limits the actual supplied voltage to be no more than the rated voltage under
reasonable line variation.
The SPS/R provides field terminations for DC bus connections for up to 4 S/O units. The terminations are
WAGO 264 Series cage clamp connectors and are detailed in Figure 3-1. Each terminal has four internally
connected “insertion points.” The lower two are provided for customer connections; the upper two are
reserved for the factory.
The SPS/R provides wire tie receptacles above and below each S/O unit. These receptacles allow for proper
strain relief of all cables and wires entering and exiting the S/O units.
4.7.2.2 SPS/R Wire Preparation and Insertion
SPS/R field terminations accept 16-28 AWG wire. Wire should be stripped 6mm (0.25"). Normally, wires
need not be tinned or crimped with a wire ferrule. To insert wires, place a small screw driver fully into the
opening just above the insertion point and rotate upward slightly. The metal clamp will open; insert wire
and remove the screw driver. Ensure that the clamp is in contact with the conductor, not the insulation.
Ensure that no bare wire is exposed outside the insertion point. Gently pull the wire to ensure that it is fully
inserted.
4.7.2.3 Wiring SPS/R A/C Line
Configure the SPS/R for the appropriate voltage (115 or 230 volts AC) according to Figure 3-1. Use small
jumpers prepared according to instructions in “SPS/R Wire Preparation and Insertion” above. Four
connections are provided for bus+ (two from each of terminals 5 and 6) and four are provided for bus- (two
from each of terminals 7 and 8).
4.7.2.4 Fusing
If you are not using an SPS/R, you must fuse the incoming power (J1, pin 5). Use a slo-blow fuse. For the
SO-4004, the fuse should be no larger than 6 amps. For the SO-4008, the fuse should be no larger than 12
amps. These values (6 and 12 amps) are larger than the nominal value of the amplifier (4 and 8 amps,
respectively) because the amplifiers can produce peak currents which are double the continuous current.
4.7.2.5 Motor Protection
Be aware that fusing the power supply input lines does not necessarily limit current in the individual motor
leads, especially when the motor is stalled or rotating slowly. The pulse-width modulation (PWM) topology
used in this amplifier can produce large motor currents from much smaller line currents. Do not rely on
power-supply fusing to limit current in the motor leads. If motor leads must be current limited, then protect
the motor leads with motor overload relays or fuses in addition to fusing the power supply input lines.
The maximum bus voltage
must be 40 volts or less
under all conditions.
CAUTION
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