counter Feature 1. Backup data for power fail 2. 6 or 4 position digit counter 3. Precision measuring and easy-read,high anti-interference 4. Output alarm with relay Model and parameter Counting signal Input impedance More than 100KΩ Input level H more than 5V; L less than 2V Max. input 50V Step Descend edge Relay output Output mode R,N,C,F Output cycle 0.01-99s Contact burden 250VAC/3A Power supply AC90V-250V (50Hz) Anti-interference IEC801 3G Ambinet temperature 0 to +50°C Storage temperature -20°C to +70°C Withstand impedance Min100MΩ Counting speed (5 class forset) 20CPS,200CPS,3000C PS,10000CPS