©NationalInstruments Corporation 27 MID-7604/7602Power Drive
Specifications
Thef ollowingspecifications apply only to the MID-7604/7602. To obtain
asystem specification, you must account for your motion controller. Refer
toyour controller specifications to determine overall system specifications.
Some signals havecompatibility d efinedas signal pass-thro ugh, which
meansthe MID-760 4/7602 may havepassive filtering on these signals but
will not affectthe voltage range or current handling capabilit y.Consult
your motion controller specifications to determine the allowable voltage
range and logic levelcompatibilit y of the signal.

Stepper Amplifiers

Type....................................................... IM481H modular hybrid,
bipolar chopper
Choppingfrequency ...............................20 kHz
DC-bus motor.........................................24 VDCnominal
Currentp er phase ................................... 0.20–1.4 A peak (0.14–1ARMS)
(factory setting is 0.50 A peak)
Microstepping selections........................×2, 4, 8, 16, 32, 64, 128, 256
×5, 10, 25, 50, 125, 250
(factory default is ×10
microsteps/step)
Continuous power output rating
(all axes combined) ................................ 80 Wcontinuous

Encoder Interface

Inputs......................................................Quadrature, incremental
Differentialinput threshold ....................± 0.3V (typical)
Singleended inputthreshold .................. TTL/CMOS
Voltage range......................................... 0–5VDC
Noisefilter (RCtime constant).............. 100 ns
Maximum quadrature frequency ............ 1 MHz

Limit and Home Switch Inputs

Compatibility......................................... Signal pass-through