1LED indicator for each relay channel 2High quality screw terminal block, FR-4 fiber glass PCB, dual copper layers 3High quality PCB housing, DIN rail mountable 4Protect circuit action, when the power polarity wrong, components cannot easily be burned 5Compatible with PNP / NPN, meet your basic needDescription: 4-channel relay control module, using industrial-grade high-quality components, carefully designed and processed, stable performance, simple operation, can be widely used in various power control applications. Features: LED indicator for each relay channel. High quality screw terminal block, FR-4 fiber glass PCB, dual copper layers. High quality PCB housing, DIN rail mountable. Protect circuit action, when the power polarity wrong, components cannot easily be burned. Compatible with PNP / NPN, meet your basic need.Specifications: Channel: 4-channel Relay mounting: Pluggable Contact: One on one off Rated load current: 16A Input indicator light: Bipolar LED Module install: U guide rail C45 Compatible with: NPN / PNP Drive voltage: DC 24V Application: PLC, DIN rail mount Size: Approx. 7.7 x 8.5 x 6.5cm / 3.03 x 3.35 x 2.6inch Weight: Approx. 250g Package Included: 1 x Relay Module Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.