HEIDENHAIN PWM 8 - Manual (Page 18)

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4.4.1 Display of the PWM 8 MODE: MEASURE U/I in the Mode Window
Depending on the power supply of the encoder and of PWM 8, the MODE MEASURE U/I may be displayed
differently in the MODE window:
MODE: MEASURE U/I of encoders with sensor lines
(TTL, HTL, 1Vpp interface boards):
•
and internally powered encoder (= via power supply unit) or
•
externally powered encoder and parameter: P2 U-MSYS EXTERN = FLOATING
Floating power supply of the encoder with relation to the
subsequent electronics.
Current consumption of the encoder
Power supply of the encoder
(here: floating)
Sensor lines of the encoder
Special feature of HTL interface board:
A floating power supply of the encoder is not possible. The parameter P2 has no function.
The MODE MEASURE U/I is displayed as follows with HTL interface board:
Special feature of HTL interface board:
The encoder is powered by the power
supply unit (= internally) without potential segregation.
•
externally powered encoder and parameter: P2 U-MSYS EXTERN = FROM CUSTOMER
The encoder is powered directly by the subsequent
electronics without potential segregation.
Current consumption of the encoder
Power supply of the encoder
(here: customer voltage)
Sensor voltages of the encoder