Banner Engineering SSM-FM-11A10 Industrial Relays Safety Speed Module; Supply Voltage: 24 V ac/dc; Input: Two Sensors with PNP Outputs; Output: 2 NO, 4 A; Aux Output: 1 NC, 4 A; Terminal Block: Removable; Width: 45 mm; Self-Checking Circuitry, Detectable Speed Range 5-10,500 ipm