2198-E1015-ERS — Kinetix 5500 Capacitor Module, 400V, with Safe Speed Monitor

The 2198-E1015-ERS is a DC bus capacitor module for the Kinetix 5500 servo drive system, adding bulk energy storage capacity to a shared DC bus group. It mounts alongside converter and axis modules on the same bus bar, increasing the system's regenerative energy buffering capacity without adding another axis. The "ERS" designation indicates integrated Safe Speed Monitor functionality, providing a hardware-level speed-limit safety output independent of the drive's standard control electronics.

Specifications

Parameter	Value
Part Number	2198-E1015-ERS
Series	Kinetix 5500
Function	DC bus capacitor module (energy storage)
DC Bus Voltage	400V DC nominal (matches connected converter rating)
Capacitance	~1000 μF (nominal)
Shared Bus Connection	Yes — bus bar mount alongside converter/axis modules
Safety Function	Safe Speed Monitor (ERS — SIL 2 / PLd)
Regenerative Energy Role	Buffers braking energy from decelerating axes
Enclosure	IP20
Operating Temperature	0°C to 50°C

Adding Buffer Capacity to a Shared Bus

In a Kinetix 5500 shared-bus group, axes that decelerate push regenerative energy onto the common DC bus, where it's ideally absorbed by other axes that happen to be accelerating at the same moment. When the timing doesn't line up — several axes braking simultaneously with nothing drawing that energy back out — bus voltage spikes, risking an overvoltage fault. The 2198-E1015-ERS adds capacitance to extend the time window over which that energy exchange can happen, smoothing out momentary imbalances without needing every joule of braking energy to be reused by another axis in the same instant.

This matters most in high-cycle, fast-motion applications — pick-and-place, indexing, flying shear — where axes accelerate and decelerate constantly and the timing between events is tight but not perfectly synchronized. Adding bus capacitance here can reduce or eliminate the need for braking resistors that would otherwise dissipate that mismatch as heat.

Sizing and Bus Placement

Sizing requires the total regenerative energy profile of the axis group, the acceptable bus voltage rise limit, and the cycle time available for energy reuse — calculated from the actual motion profiles, not estimated.
System sizing software for the Kinetix 5500 platform automates this calculation from configured axis motion profiles; manual calculation via the energy storage formula (E = ½CV²) is possible but more error-prone for multi-axis groups.
Physical placement on the bus bar follows the system wiring diagram's placement rules — consult the Kinetix 5500 system documentation for correct positioning relative to the converter and axis modules.
Bus bar connections must be torqued to specification; under-torqued joints generate resistive heating that degrades the connector and the module over time.

FAQ

Q: Does adding this module eliminate the need for a braking resistor entirely?

It depends on the axis group's net energy balance. In well-balanced systems where most braking energy is reused by accelerating axes, additional capacitance can eliminate the resistor requirement. In systems with significant net regeneration, a resistor or regenerative supply is still needed for the excess.

Q: What does the ERS safety function monitor?

Safe Speed Monitor tracks motor speed via feedback and triggers a safety output if the speed exceeds a configured limit — independent of the drive's main control loop, used in safety architectures requiring verified safe-speed confirmation before allowing operator access.

Q: Can this module be used with Kinetix 5700 systems?

No. The 2198 series capacitor and converter modules are specific to the Kinetix 5500 bus architecture. Kinetix 5700 uses a different bus module family that isn't interchangeable with 2198 components.

Q: Is the Safe Speed Monitor function mandatory, or can a non-ERS capacitor module be used instead?

The safety function is only mandatory if the application's safety architecture specifically calls for hardware-based speed monitoring. Where that requirement doesn't exist, a standard (non-ERS) capacitor module of equivalent capacitance can be used instead.

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