2090-XNSM-W — Safe Torque-Off Header Connector Kit for Multi-Axis Servo Drives

The 2090-XNSM-W is a header connector kit for the hardwired Safe Torque-Off (STO) signal path on multi-axis servo drive systems, providing the terminal connector hardware used to wire and daisy-chain the safety signal between adjacent axis modules sharing a common bus. It's a wiring accessory rather than a functional safety device in itself — the kit supplies the physical connector interface that the safety circuit's wiring terminates into at each drive position.

Specifications

Parameter	Value
Part Number	2090-XNSM-W
Function	Safe Torque-Off header connector kit
Used With	Multi-axis servo drive systems with hardwired STO
Component Type	Wire terminal connector kit

Daisy-Chaining Safe Torque Off Across Multiple Drives

On multi-axis servo systems with several inverter modules sharing a common power bus, the safety circuit needs to reach every axis that requires STO — running a separate home-run wire from the safety relay to each individual drive becomes a significant wiring burden as axis count grows. Header connector kits like the 2090-XNSM-W provide the terminal interface that lets the STO signal pass from one drive's connector to the next drive's connector in sequence, rather than requiring an independent wiring run back to the safety source for every axis on the bus.

Getting the connector position right matters in a multi-axis bus — header kits are typically designated for specific positions in the chain (such as a starting header versus an intermediate or middle header), and using the wrong type at the wrong position in the sequence can break electrical continuity of the safety signal across the bus.

FAQ

Q: Is this kit itself a safety-rated component, or purely a wiring accessory?

It's a wiring accessory — the connector hardware that the safety circuit's wiring terminates into. The safety function itself is performed by the drive's STO circuitry and the upstream safety relay or controller, not by this connector kit.

Q: Can this header be used at any position in a multi-axis bus chain?

No. Header kits in this family are typically position-specific — verify whether the application calls for a starting, middle, or end-of-chain header before installation, since using the wrong type at the wrong position can interrupt the safety signal path.

Q: Does installing this kit require the bus to be de-energized?

Yes. Any wiring work on the safety signal path, including connector installation, should be performed with the system de-energized to avoid disrupting an active safety circuit or risking electrical contact during the work.

Q: Is this kit compatible across different drive frame sizes in the same platform?

Compatibility depends on the specific drive family and bus architecture — verify the kit's documented compatibility against the exact drive models and frame sizes installed on the bus before ordering.

2090-XNSM-W Genuine 2090XNSMW DriveToDrive Terminating Headers