'AH' Series Trip Amplifiers Function Option * General Notes Suffix (click)           L X V X X X K DI M Thermocouple AHT611 Types: B,E,J,K,N,T,R,S. AHT612 Millivolt AHT615 From 0-5mV to 0-400mV AHT616 RTD AHT621 2,3 or 4 wire connection AHT622 RTD(Differential) AHT626 Both inputs 2 wire AHT625 Process Input AHT631 Current 400mV drop, volts> 400mV AHT632 Pump Control AHT635 Process (Diff) AHT639 Current 400mV drop, volts> 400mV Slidewire AHT641 Conventional or conductive plastic Slidewire AHT642 2,3 or 4 wire connection Slidewire (Diff) AHT645 Both inputs 2 wire AHT646 AC Current AHT651 Internal VT/CT fitted for power measurement AC Voltage AHT652 AC Frequency AHT681 Any regular waveform AHT682 Function Option General Notes Key to Table Not available Standard AMELEC product     Non-chargeable option Chargeable option * A display module (AHM990DI) can be fitted in the rack. The input and set points on the individual units being shown on this common display.