IHA1045 overall


Hollow shaft encoder, axis inside diameter 45mm, ( 42mm, 40mm on order), housing diameter 100mm.

Easy installation by means of clamping shaft and flex bracket flange, stable output, rugged and extremely thin hollow shaft encoder for the extension on power motors.


Power motors are three phase current motors with frequency transformation, system construction, elevator systems.

Output Waveform

90 Output phase difference, CW rotation

(CW rotation as seen from fit surface)

ISN4005 rotation (1)

Square-wave accuracy: X1 + X2 = 1/2T 1/12T, X3 + X4 = 1/2T 1/12T

Pitch error of period: 0.01T

Pitch error of phase position: 1/18T

Z Phase: Tz=1/4T (1T,1/2T,1/4T…)

Period of pulses: T=360 /N (N: output pulses)

Signal accuracy: Xn=1/4T 1/12T (n=1,2,3,4)

A leads B clockwise when viewing the encoder shaft end.

The position of Z shaft against A,B phase is not specified.

Technical Specifications

Electrical specifications
Output wave Square wave
Output signals A,B,Z (line driver output A,A,B,B,Z,Z phase)
Current consumption 180mA
response frequency 0~120KHz
Output phase difference 90 45
Supply voltage 5V DC, 5-12V DC, 12-24V DC
Signal level VH 85% Vcc, VL 0.3V
Number of pulses IHA1042,IHA 1045: 600,1024,1200,3000 IHA1040: 150,600,1024,1200,2500,3000 (other number of pulse available on request)
Output circuit Push pull, Line driver
Mechanical Specifications
Speed without sealing 4000rmp
Rotor moment of inertia Appr.4.0×10-5 Kgm2
Starting torque without sealing 5.0×10-2Nm (+25 C)
Maximum load permitted on shaft Radial 50N, Axial 40N
Shock resistance 980m/s2, 6ms, 2 hours each on XYZ
Vibration proof 50m/s2, 10~200Hz, 2 hours each on XYZ
Working life MTBF 50000h (+25 C, 2000rpm)
Weight Appr. 510g (15 pin rectangle plug radial)
Environmental Specifications
Working humidity 30~85% (no condensation)
Storage temperature -40 C~110 C
Working temperature -25 C~100 C
Protection class IP50

Terminal Assignment

Signal +5V 0V SIG A SIG A SIG B SIG B SIG Z SIG Z Shield
Cable Color Red Black Green Brown White Grey Yellow Orange N.C
15 pin rectangle plug(Push pull) 7 5 4 / 2 / / / 8
15 pin rectangle plug(Line Driver) 6 5 4 3 2 1 9 10 8
Note: Shield is attached to connector housing, 1 meter cable lengths (other cable lengths on order)

Ordering Code

IHA1045 302 J 600 BZ2 12-24 F
Series Sequence Number Connection Number of Pulses Output Signals Supply Voltage Output Circuit

Selection Guide (2)


IHA6012 dimensions (1)

Motors described above are typical and can be customized upon request.

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