... ramp/soak,48*48,SSR output, 1 alarm. with RS485 MODBUS communication function.1. Main featuresDesigned specially ... ,prompt delivery,best service after sale.Armed with AT and AI PID Intelligent control algorithm function ... Based on AI-208, AI-216P is with one segment time programm,ramp/soak.,and 4-digit display ... : On-off control mode , or PID control with the function of parameter auto tuning.Output: SSR ...