The MKEY designation (4,5,6,8,9) defines the mechanical coding pattern that mates with the Mosaic safety controller's base unit. It prevents insertion of the wrong accessory into a given slot — a physical keying scheme that enforces correct configuration without relying on software checks alone.

ABB 2TLA050040R0203 MKEY Accessory, Current Lifecycle
ABB 2TLA050040R0203 MKEY 4,5,6,8,9, Type Accessories, lifecycle_stage current.
Specifications
| Parameter | Value |
|---|---|
| Type | Accessories |
Product details
Frequently asked questions
What is 2TLA050040R0203's listed type on this component line?
The listed type is Accessories, confirming it is a configuration key for the Mosaic safety controller family.
Where can I buy 2TLA050040R0203?
This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment.