HEIDENHAIN PWM 20 - Manual (Page 90)

November 2014 Software description 91
Voltage [Remote Sense]:
Operating voltage at the measuring system; voltage drops on the encoder supply lines
are taken into account.
Current:
Display of the encoder current consumption
Power [Remote Sense]:
Power consumption of the encoder
If the encoder does not draw any power, the display changes to red.
"Terminating resistors" key
The "Terminating resistors" key serves to (de)activate the terminating resistors
Z0 = 120
.
(Also see chapter “Interface description” on page 209.)
Note
In general, the terminating resistor is inactive and cannot be switched on, if the
PWM 20 is operated in feed-through mode (closed loop, "Use power supply from
subsequent electronics" checkmark is set).
When the menu is changed, the ATS software again uses its default setting:
- Measurement without feed-through: Terminating resistor active
- Feed-through operation: Terminating resistor inactive
The terminating resistors are active.
The terminating resistors are inactive.
Note
The display may be different, depending on the type of power supply selected and on the
encoders connected.
The displays Voltage [Remote Sense] and Power [Remote Sense] are active, if "Adjust
voltage over sensor lines" was selected in the window for manual encoder selection.
In "closed-loop operation" and when a Service Adapter (e.g. SA 100 or SA 110) is used,
power supply and current consumption of the service adapter (not of the encoder) are
displayed!