2198-P070 AB 5700 DC Bus Supply 2198P070 Brand New In Box

Allen-Bradley 2198-P070 — Kinetix 5700 DC Bus Supply | 70A | 37.8kW | Brand New In Box

The 2198-P070 is the 70-amp DC bus supply module for Allen-Bradley's Kinetix 5700 servo drive system — the shared DC bus power front-end that feeds a group of Kinetix 5700 axis modules from a single three-phase AC connection. If you're building a multi-axis Kinetix 5700 system on a machine with more than a couple of servo axes, this is where the power enters the servo system.

Understanding what a DC bus supply does — and why the 5700 architecture uses one — is worth a moment before getting into specifications.

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What a DC Bus Supply Actually Does

Traditional servo drives have their own rectifier front-end — each drive converts AC to DC independently. This works fine for single-axis applications, but in a multi-axis machine (a gantry with X/Y/Z axes, a winding machine with tension and traverse drives, a robot with 6 joints), there are inefficiencies. When one axis decelerates and regenerates energy back to the DC bus, that energy has nowhere to go except a braking resistor — wasted as heat.

The Kinetix 5700 architecture centralizes this: one 2198-P070 bus supply handles the AC-to-DC conversion for multiple axis modules connected to a shared DC bus rail. When one axis regenerates, its energy goes onto the shared DC bus and is immediately consumed by another axis that's accelerating or holding load. Regenerative energy is recycled within the machine itself rather than burned off. In a busy multi-axis system, this can meaningfully reduce peak demand on the incoming power supply and eliminate the need for large braking resistors.

The 2198-P070 is the 70A variant, corresponding to approximately 37.8kW of bus capacity at 480VAC input — suitable for Kinetix 5700 systems with total drive power requirements up to this level. Smaller systems use the 2198-P031 (31A) or 2198-P070, and larger systems scale up to the 2198-P141 (141A) or 2198-P208.

Technical Specifications

Active Front End — More Than Just a Rectifier

The 2198-P070 isn't a simple diode bridge rectifier. It uses an active front end (AFE) with IGBT switching — meaning it actively regulates the DC bus voltage and, critically, can regenerate energy back to the AC supply grid rather than just the shared DC bus.

This matters in applications with high regenerative energy: vertical axes with heavy loads, deceleration from high speeds, constant tension control with braking. In a traditional passive rectifier system, all regenerative energy must be absorbed by a braking resistor. With the 2198-P070's active front end, deceleration energy flows back to the AC supply, reducing both energy consumption and panel thermal load. In energy-cost-sensitive manufacturing environments, this is a genuine operational saving that can be measured in power bills.

The AFE also maintains near-unity power factor on the AC supply side, which reduces reactive power demand and can avoid power factor penalty charges from utilities.

Kinetix 5700 Bus Supply Selection: Which One to Specify

The 2198-P070 is one of four bus supply ratings in the Kinetix 5700 family. Selecting the right one requires calculating the total drive power for all axis modules connected to the shared bus.

For system sizing: add the continuous power ratings of all Kinetix 5700 axis modules in the system (from Rockwell's module selection data), multiply by a simultaneous demand factor (typically 0.7–0.9 for most machine profiles), and add a headroom margin. If the result is 25–35kW, the 2198-P070 is the appropriate choice.

Compatibility and Cabling

The 2198-P070 connects to Kinetix 5700 axis modules (2198-D006, 2198-D010, 2198-D020, etc.) via a DC bus bar rail — a physical bus connector system that links the supply module and axis modules in a row mount configuration. The modules must be physically adjacent on the same panel rail section.

Control and EtherNet/IP communication uses Rockwell's Kinetix 5700 hybrid cable that connects from the ControlLogix or CompactLogix chassis to the bus supply's EtherNet/IP port, then daisy-chains to each axis module. The drive system appears as individual EtherNet/IP nodes in Studio 5000 Logix Designer.

Incoming AC power requires a properly sized input contactor and fusing per Rockwell's sizing tables in the Kinetix 5700 User Manual (2198-UM002). The system also requires a proper safety circuit implementation including Safe Torque Off (STO) wiring for the individual axis modules.

❓ FAQ — Allen-Bradley 2198-P070

Q1: What servo drives is the 2198-P070 compatible with?

The 2198-P070 is designed exclusively for the Allen-Bradley Kinetix 5700 servo drive family. Compatible axis modules include the 2198-D series (single-axis) and 2198-S series (dual-axis) Kinetix 5700 drives. It is not compatible with Kinetix 5100, 5300, 5500, or 6500 series drives, even though some are also EtherNet/IP based — the DC bus connector and power sharing architecture are specific to the 5700 platform. Always verify the drive model numbers in your system before ordering the bus supply.

Q2: Does the 2198-P070 include a braking resistor, or is one needed?

Because the 2198-P070 has an active front end that regenerates energy back to the AC supply, a braking resistor is generally not needed under normal operating conditions — regenerative energy from decelerating axes goes back to the grid rather than to a resistor. However, Rockwell's sizing guidelines note that if the total system is operating in an isolated generator supply environment (where regeneration back to the grid is not possible), or if the system has very high regenerative transients that briefly exceed the AFE's absorption capacity, a shared DC bus capacitor module or bus supply in regenerative clamp mode may be considered. Consult Rockwell's system sizing application (Motion Analyzer) for your specific machine profile.

Q3: What PLC and software is required to configure and commission the 2198-P070?

The Kinetix 5700 system including the 2198-P070 bus supply requires a ControlLogix or CompactLogix controller running firmware compatible with the Kinetix 5700 device profile, and Studio 5000 Logix Designer software for configuration and commissioning. The drive setup, axis configuration, and motion parameter entry are all done in Studio 5000. Rockwell also provides Motion Analyzer software for system sizing and verification. The Kinetix 5700 User Manual (2198-UM002) is the primary reference document for installation and commissioning.

Q4: What input power infrastructure does the 2198-P070 require?

The 2198-P070 requires a 3-phase 480V AC, 50/60Hz supply. The input should be fed through a properly rated input contactor (selected per Rockwell's sizing tables based on the bus supply's input current rating) with upstream fusing or circuit breakers. The system also requires a low-impedance ground to the panel earth bus for proper EMC filter operation and ground fault protection. For CE compliance in European installations, input line filters are required per Rockwell's EMC installation requirements. The supply must not be connected directly to a supply without an isolation transformer if the neutral-to-earth voltage exceeds Rockwell's specifications.

Q5: Can I use the 2198-P070 in a 400V European supply instead of 480V?

The 2198-P070 is rated for 480V AC input. Operating it on 400V AC (European standard) will result in a lower DC bus voltage (~540V → ~565V at 480V vs ~508V at 400V). The axis modules are designed to operate over a range of DC bus voltages, and Kinetix 5700 drives are available in both 480V and 400V configurations. Confirm with Rockwell's selection guide which catalog numbers are appropriate for 400V European supply — there are region-specific variants. Mismatching supply voltage to drive input rating can affect performance and potentially void certification.

Q6: How is the 2198-P070 physically mounted in the panel?

The 2198-P070 mounts vertically on the panel backplate using four mounting bolts. It must be mounted vertically (not horizontally or inverted) for proper thermal management — the integrated cooling fan exhausts upward. The axis modules mount adjacent to the bus supply on the same panel section, connected via the DC bus bar connector. The assembly requires specific minimum clearances above and below for cooling airflow as specified in the Kinetix 5700 Installation Manual. Panel depth must accommodate the unit's ~350mm depth plus clearance for cable routing at the bottom.

Q7: What faults commonly occur on the 2198-P070 and how are they diagnosed?

Common faults visible in Studio 5000: Bus Overvoltage (F010) — DC bus voltage exceeded safe limit, often caused by a regeneration event larger than the AFE can absorb; check drive deceleration rates and system power balance. Bus Undervoltage (F011) — supply voltage below minimum; check incoming 3-phase voltage and input connections. Input Phase Loss (F012) — one phase of the incoming 3-phase supply is missing; check upstream fusing and contactor. Thermal Fault (F020) — module overtemperature; check panel cooling and ambient temperature. Ground Fault (F023) — leakage current to ground exceeded threshold; check motor cable insulation and motor winding condition. All fault codes are documented in the Kinetix 5700 Reference Manual (2198-RM002).