The LiftMaster 041K0811 CPSIII Interface Card is an OEM accessory that enables a second monitored safety device on compatible LiftMaster commercial door operators that use the CPS3 (Commercial Protector System) connection. Adding this card allows operators to monitor two entrapment-protection devices simultaneously—commonly a primary photoelectric sensor and either a second photo eye or a monitored sensing edge—supporting UL 325 compliant operation on industrial and commercial overhead doors. It’s a practical replacement part or upgrade for facilities that need dual-device protection at the opening.
Designed to integrate directly with the operator’s control board, the 041K0811 provides an additional CPS3 channel so a second monitored device can be wired and supervised by the operator. Typical compatible devices include LiftMaster monitored photo eyes such as CPS-U/CPS-UN4 and monitored sensing edges used with the appropriate monitored interface. Installation involves plugging the interface card into the designated slot on the operator and landing the safety device leads per the operator’s wiring diagram, followed by standard safety and function tests outlined in the operator manual. Use only with LiftMaster commercial operators that specify CPS3 compatibility, and verify sensor types and wiring requirements to ensure proper monitored operation.