This part of IEC61810 specifies special requirements and tests for elementary relays with forcibly guided contacts, also known as mechanically linked contacts. These special requirements apply in addition to the general requirements of IEC61810‑1 . NOTE1 This standard does not apply to electromechanical control circuit devices as described in IEC60947‑5‑1. NOTE2 IEC61810‑2‑1 provides guidelines for the assignment of reliability values. NOTE3 Contacts that are not mechanically linked (forcibly guided) are not considered in this standard.