FUTEK IHH500 Series - Manual (Page 21)

EM1001-B
- 21 -
10 Thomas, Irvine, CA 92618 USA
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There are two pulse signals, P1 and P2, which are used to indicate speed, angle, power, and the direction
of rotation. These pulses are 90 degrees out of phase, and depending on which pulse is leading or
lagging or how many pulses are present in a certain time frame, the IHH500 can calculate these values.
Leading, TTL
Lagging, TTL
Calculation of Power:
Power is calculated by using the following formula:
60000
2 RPM T
N T P
 
  

Where:
P: mechanical power in kW
T: torque in N-m
RPM: speed in rev / min
Calculating the Power Units:

If the g-mm, g-cm, g-m or N-mm units have been defined, the mechanical power is automatically
calculated in W

If the kg-cm, kg-m, or N-m units have been defined, the mechanical power is automatically
calculated in kW

If the kN-m unit has been defined, the mechanical power is automatically calculated in MW

If the In-Ib, oz-in or ft-Ib units have been defined, the mechanical power is automatically
calculated in HP
Direction of Rotation:
Since there are two pulses, a direction of rotation (CW or CCW) can be defined depending on which
pulse is leading.