Telemecanique Altivar 56 manual - Northern Industrial

Chapter 2 — WiringBulletin No. 50006-519-01BUsing the Speed Reference Inputs (J13) December 1996USING THE SPEEDREFERENCE INPUTS(J13)The ALTIVAR 56 drive controller has two analog inputs for the speed reference,AI1 and AI2. AI1 is a 0-10 V voltage input. A speed potentiometer between2.2 kΩ and 2.5 kΩ can be connected at COM, AI1 and +10 V as shown in Figure 14.AI2 is factory set as a 4-20 mA current input. It can be programmed to0-20 mA, x-20 mA or 20-4 mA with the keypad display. It can also be set for0-5 V with a switch on the control board.• The speed reference controls the frequency of applied power to the motor. Theactual shaft speed remains dependent on the acceleration and decelerationramps, the torque capabilities of the motor/drive controller combination, thecontrol type selected (see page 35), and the number of poles on the motor.• The speed range is limited by Low Speed and High Speed settings. Factorysettings are zero and nominal or base frequency.• The speed reference inputs share the same common and are isolated from theinput line and from ground.• The +10 V internal supply (terminals +10/COM) has a 10 mA supplycapability and is protected against short circuits.• If signals are present on both inputs, the values are summed for the speedreference. With the keypad display, they can be configured to be independent.For more information on configuration of the analog inputs, refer to Chapter 5.Figure 14 shows how the speed reference inputs may be connected. The speedreference inputs are isolated from the input line.S0 VCOM AI1+10V+10V AI2R4-20 mACustomersupplied2.2 kΩ < R < 2.5 kΩDefault setting: AI1 + AI2Figure 14: Using Speed Reference InputsUSING THE ANALOGOUTPUTS (J13)The ALTIVAR 56 drive controller has two 0-20 mA analog outputs, AO1 and AO2.They are both 0-20 mA current inputs. AO1 is factory set as proportional to motorfrequency, with 20 mA corresponding to High Speed. AO2 is factory set asproportional to motor current, with 20 mA corresponding to twice the rated outputcurrent of the drive controller (see Tables 1 to 4 on pages 3-4).• Maximum driving voltage is +12 V with an internal impedance of 100 Ω.• The analog outputs can be assigned to other functions than those set at thefactory. For information on other functions, refer to Chapter 5.0-20 mA0-20 mACOM AO1 AO2Hz250 Ω A 250 Ω CustomersuppliedFigure 15: Analog Outputs26 © 1996 Square D All Rights Reservedηττπ://νιχοντρολσ.χοm