... ON/OFF control 2011--HHE series Digital Timer Counter,Timer Relay(Latest)HH4 series, 48*48*80mm,dual line 4 digits ... and delay output.5) one alarm output relay/SSR.6) RS232 or RS485 communication ( Modbus RTU protocol) for your option.7) Power ... Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity Sensor, ,Pressure sensor ,load cell sensor, KNE KSC ...