Schneider Electric's Square D 8501-LT Timer Attachment is a pneumatic timing accessory that mounts onto Square D 8501 Type X relays to provide a controlled delay in a control circuit. It delivers a fixed 60-second timing interval and is designed to mount on 0- to 4-pole AC or DC relays (excluding the XMO master relay). When paired with compatible 8501 relays, the 8501-LT enables simple sequencing and interlock timing in industrial controls.
