ACR74 Stepper Power Supply Sizing

The ACR74T is powered from 24volts. Power supplies vary based on power and current output.

The power required for an ACR74T depends upon the size of the motors, the motors' shaft power and the control power.

Warning! Do not just add the motor phase currents together. This will result in an unnecessarily oversized power supply. As an example, an ACR74T with 4 eCLM step motors (S232F, S173F, S113F, S083F) requires 69watts (2.9A). Adding the phase current would be over 8A, almost 3times bigger than necessary.

Shown (left to right): 20A power supply, 2.5A power supply (Parker PS60-W) and the ACR74T stepper drive/controller

Excel spreadsheet calculator:

ACR74T_PowerSupply_Sizer.xlsx

	Motor Current Rating, Amps (pk)	Power, Watts
eCLM-S082F	0.85	1
eCLM-S083F	0.85	3
eCLM-S111F	0.95	4
eCLM-S112F	0.95	5
eCLM-S113F	0.95	6
eCLM-S171F	1.88	10
eCLM-S172F	2.38	17
eCLM-S173F	2.38	18
eCLM-S174F	1.7	10
eCLM-S231F	3.96	23
eCLM-S232F	3.96	30
eCLM-S233F	3.96	37
eCLM-S601F	4	28
eCLM-S602F	4	46
eCLM-S603F	4	53

eCLM-P082F	0.71	1
eCLM-P083F	0.71	1
eCLM-P111D	1.34	5
eCLM-P112D	1.34	6
eCLM-P113D	1.34	8
eCLM-P171A	1.7	16
eCLM-P172A	1.7	20
eCLM-P173A	1.7	19
eCLM-P174A	1.7	17
eCLM-P231A	4	21
eCLM-P232A	4	51
eCLM-P233A	4	59
eCLM-P601A	4	40
eCLM-P602A	4	66
eCLM-P603A	4	85

LV111 Series	1.3	6
LV112 Series	1.3	10
LV113 Series	1.3	9
LV141 Series	1.3	7
LV171 Series	1.14	7
LV171 Parallel	2.28	14
LV172 Series	1.2	9
LV172 Parallel	1.2	17
LV173 Series	1.2	11
LV173 Parallel	2.5	23
LV231 Series	2.8	33
LV231 Parallel	5.6	46
LV232 Series	3.3	30
LV232 Parallel	6.6	54
LV233 Series	3.8	43
LV233 Parallel	7.5	50
LV341 Series	3.87	20
LV341 Parallel	7.74	35
LV342 Series	4.26	24
LV342 Parallel	8.52	32
LV343 Series	5.03	42
LV343 Parallel	10.06	81