1、Maintain separately: This relay module control board possess pluggable base, easy to replace, each relay can be maintained separately 2、Save Installation Space: The size is smaller and the installation space is saved compared with the traditional relay, more convenient 3、High Sensitivity: Relay module come with large capacity and high sensitivity. 4 channel module number, contact form is 1 open and 1 closed 4、DIN Rail Mounting: Adopt DIN rail mounting method, rated current and voltage support 12A DC 30V, 12A AC , very flexible 5、For Industrial Equipment: PLC DC relay module is suitable for industrial equipment, PLC control cabinet, CNC lathe, etc., very practical Item Type: Relay Module Control Board Product Material: ABS + stainless steel + brass Product Model: BEM1S-4MZ Number of Modules: 4 Channel Contact Form: 1 open and 1 closed Installation Method: DIN rail mounting Product Quantity: 2Pcs Scope of Application: Suitable for industrial equipment, PLC control cabinets, CNC lathes 2 x Relay Module Control Board