'AH' Series Arithmetic Units & Power Supplies Function Arithmetic Units Option General Notes Suffix (click)               R       K Scale/bias/invert AHC811 4HP         Window expansion/contraction/reversal Square root AHC812 4HP Process input root extraction High/low select AHC813 8HP Multi-input (up to 5) Hi or Lo select Multi I/P +, -, Av AHC814 8HP Multi-input (up to 5) +, - or Average Multiply/Divide AHC815 8HP 2 or 3 input dependent on equation High and low limit AHC816 4HP   Shunt I to 400mV, V >400mV Linear Integrator AHC853 4HP 50 to 50,000 counts per hour   Function Power Supplies Option   General Notes Suffix (click)               R       K Single output AHP901-1 24V @21mA for loop excitation Double output AHP901-2 2 x 24V @21mA for loop excitation High current AHP991 12, 15 or 24V @ up to 1A   Key to Table      Not available      Standard Features Standard AMELEC product Fully insulated - Input(s)/ Output/ Supply/ Earth Non-chargeable option Output drive - (current) Up to 20mA into a 20V loop. Chargeable option - (Voltage) Up to 10V at up to 20mA loading. Chargeable option Multi input unit, 3,4 or 5 input