PI1 Process Interface (optional)
Power Analyzer NORMA 4000, NORMA 5000
57
EO1111G REV G
9 PI1 Process Interface (optional)
The PI1 interface allows you to simultaneously analyse the
electrical and mechanical power of up to 4 motors (generators).
The torque and rotational speed are thereby measured as analog
signals or via frequency inputs.
9.1 Pin assignment
The PI1 is located on the rear panel of the power analyzer (see
chapter 3 "Design and functions", page 7).
1
14
13
25
M 1–
N 1–
M 2+
N 2+
D 2+
M 3–
N 3–
M 4+
N 4+
D 4+
A 1
A 3
A 4
A 2
AGND
N 4–
M 4–
D 3+
N 3+
M 3+
N 2–
M 2–
D 1+
N 1+
M 1+
Pin Assignment
M1+...M4+
M1-...M4-
4 inputs for torque; configurable for analog or digital
signals
N1+...N4+
N1-...N4-
4 inputs for rotational speed; configurable for analog
or digital signals
D1+...D4+
4 inputs for sense of rotation; only for motor analyses
with digital speed inputs; corresponding inputs, e.g.
N1/D1 share a LO port
AGND
Input of analog ground
A1...A4
4 analog outputs
9.2 Measured values
The torque is measured by means of a force transducer or torque
measuring shaft with a ± 10V DC output or a frequency output.
The speed is measured by means of an incremental encoder with
TTl or AC output; alternatively, an analog signal, e.g. from a
speedometer might be used.
Torque
Rotational speed
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