Curtis 1238SE - Page 23

2 — INSTALLATION AND WIRING
pg. 19
Return to TOC Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017
Position feedback input: Sin/Cos sensor
Two control lines are internally congured to read a Sin/Cos sensor. Position Feedback A (pin 31)
provides the sine signal, and Feedback Position B (pin 32) provides the cosine signal. e device
must be set up with one sensor revolution per mechanical revolution. e Sin/Cos sensor is used in
SPM applications.
SIN/COS SENSOR INPUT SPECIFICATIONS
Signal Name Pin
Operating
Voltage
Input Impedance
Max.
Frequency
Protected
Voltage
ESD
Tolerance
Position Feedback A 31
0 to 5 V
150 kΩ for voltages ≤ 5 V
75 kΩ for voltages > 5 V
500 Hz
–5 V to (MaxV
+ 10 V)
± 8 kV
(direct
strike)
Position Feedback B 32
ese signal tolerances must be maintained throughout the application’s operating conditions,
including voltage, temperature, speed and torque ranges. e Sin/Cos waveform peaks must be away
from V
dd
and ground by at least 0.5 V. In the example shown in the timing diagram below, V
dd
= 5 V.
360° mechanical (1 cycle)
V
pp
V
A
V
B
0.5 V
V
dd
Gnd
V
dd
2
V
dd
2
90°
0.5 V
13
24
1
23
35
12
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Figure 3 wiring diagram p.12