2090-CPWM7DF-08AA25 — Kinetix VP Servo Motor Power Cable, SpeedTec to Flying Lead, 25 m

The 2090-CPWM7DF-08AA25 is a factory-assembled servo motor power cable connecting a Kinetix VP motor's SpeedTec DIN power connector to a flying-lead drive end for termination at the Kinetix 5500 or 5700 drive's power output terminals. Length is 2.5 m. The cable carries the three-phase motor power conductors plus a separate brake conductor pair, all within a construction rated for the peak current and voltage conditions produced by the drive's PWM output.

Specifications

Parameter	Value
Part Number	2090-CPWM7DF-08AA25
Motor Connector	SpeedTec DIN (rotating) — motor end
Drive End	Flying lead (unterminated)
Cable Length	25 m
Conductor Gauge	8 mm² (approx. 8 AWG equivalent)
Conductors	3 × phase (U, V, W) + brake pair + ground
Compatible Motors	Kinetix VP series (VPL, VPH, VPF) at appropriate frame size
Compatible Drives	Kinetix 5500, Kinetix 5700
Flex Rating	Standard (not continuous-flex)
Insulation	Rated for PWM drive output — low-capacitance construction

Power Cable Construction for PWM Drives

Motor power cables for servo drives must handle two challenges standard power cables don't face. First, peak voltage: the drive's PWM output creates voltage pulses that can reach 2–3× the DC bus voltage at the motor terminals due to reflected wave effects on the cable. Standard THHN or XHHW wiring rated for 600V may be inadequate for this peak voltage environment — servo-specific cable insulation is rated for these transient peaks. Second, capacitance: higher cable capacitance increases the reflected wave amplitude and the charging current that flows through the cable on each switching cycle, adding to the drive's output current load. Low-capacitance servo cable construction minimizes both effects.

The 8 mm² conductor size in this cable matches the motor frame's continuous and peak current requirements at the drive output. Using undersized conductors causes resistive voltage drop that reduces effective motor terminal voltage and increases conductor temperature — both reduce system performance. Oversizing adds unnecessary bulk and rigidity without benefit.

Routing and Brake Wiring

The brake conductor pair inside this cable connects to the motor's holding brake (if fitted) — a 24V DC coil that holds the brake spring-closed when de-energized and releases it when energized. The brake pair must be connected to the drive's brake output terminals or to an independent 24V brake relay. Leaving the brake wires unterminated when the motor has a brake prevents the brake from releasing, which either blocks motor rotation entirely or causes the brake to drag under load if the motor overpowers the brake force.

Keep motor power cables physically separate from feedback cables throughout the run — minimum 75 mm separation.
The SpeedTec DIN connector at the motor requires the same quarter-turn locking engagement as the feedback cable — verify the connector is fully seated and locked before commissioning.
At the flying lead end, use ring terminals or ferrules on the U, V, W conductors before terminating at the drive's output terminals — bare stranded conductors under terminal screws develop resistance over time from strand scatter and oxidation.

FAQ

Q: Can this cable be used in a cable track for a moving axis?

No. The standard variant is not rated for continuous flexing. For cable-track applications, use the continuous-flex variant from the 2090-CPWM7DF series (look for the flex rating in the cable catalog suffix).

Q: Does the motor end connector fit both rotating and fixed SpeedTec DIN motor connectors?

The rotating SpeedTec DIN connector at the motor end can be oriented in any direction before locking, accommodating most cable routing directions. Verify the motor's power connector type (SpeedTec DIN power versus M23 or other circular connectors) before ordering — the connector style must match the motor's receptacle.

Q: Is a separate ground conductor required, or is the cable's ground conductor sufficient?

The cable includes a dedicated ground (PE) conductor that connects the motor's ground lug to the drive's PE terminal. This conductor carries high-frequency PWM ground currents and must be kept as short as possible with a low-impedance termination at both ends. Supplemental ground bonding between the motor frame and the panel PE bus is still recommended for EMC compliance.

Q: What is the maximum length of this cable before a dV/dt reactor is needed at the drive output?

For Kinetix 5500 and 5700 drives at standard switching frequencies, the system design guides specify maximum motor cable lengths (typically 30–50 m depending on drive and motor combination) before output reactors are required to limit peak terminal voltage. At 25 m, no reactor is needed — the reflected wave at this length is well within motor insulation ratings.

2090-CPWM7DF-08AA25 1PCS New 2090CPWM7DF08AA25 Power Cable 25M