Hettich EBA 20S - Signal and Test Results - Motor and Sensor; Speed Sensor (B3) and Motor (M1) Signal Tests

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10.2 Signals and test results
10.2.1 Speed sensor B3 (Tacho)
Power supply:
Plug S502, measure between Pin 2 (GND)
and Pin 3:
+8...+15V
0V
Tacho signal:
Plug S502 measure between Pin 2 (GND)
and Pin 4:
+8...+15V
0V
+8...+15V
0V
2 pulses per revolution
B
3
S
502
BK
RD
WH
10.2.2 Motor
Motor coil
Remove plug S401 and measure between
two lines:
230 V version: ≈ 8.4 Ω
120 V version: ≈ 2.1 Ω
Overtemperature switch
Remove plug S401 and measure between
pin 4 and 5 :
Switch closed : ≈ 0 Ω
Switch released: ∞ Ω
ΩΩ
Ω
ΩΩ
Ω
YE
BK
RD
WH WH