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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

R

Radial load, max.
Maximum loading of shaft encoder shaft in radial direction.

RAM
"Random Access Memory" chip; this memory can be read from, written to, and erased freely. When the power goes off, it loses its information.

Range mode
See operating mode

Range signal
See operating mode

Reference mark
Irregular gradation pattern that generates a single signal peak, to provide an absolute reference for an incremental shaft encoder.

Reference pulse
Square-wave signal generated by a reference mark, usually only one increment wide, to provide an absolute reference for an incremental shaft encoder.

Repeatability
Degree of deviation for a point approached repeatedly under identical operating conditions.

RES
Reset; see reset

Reset
Resetting of a counter to its initial value

Reset modes
- manual reset by pressing the reset key
- electrical reset triggered by signal at reset input
- automatic reset in preset counters after main preset value has been reached
- interruption and re-activation of power supply (power-up reset)

Reset operation
See operating mode

Resolution
Number of increments per revolution (rotary) or distance between two increments (linear)

Resolver
Inductive angular measuring device that generates two alternating voltages, with amplitude a function of the angle.

Reversal error
Deviation in reading of a position when approached from different directions (hysteresis).

ROM
"Read-Only-Memory" chip, whose memory can only be read out.

Rotational speed [n]
Specification of revolutions per unit of time (1/min, 1/h or 1/sec)

RS 422
Standardized interface for unidirectional point-to-point connections (for description refer to "Complementary"); voltage difference 7 V DC max.

RS 422/485
Interfaces for serial data transfer with specifications to EIA standards.

RS 485
Like RS 422, however as a bidirectional bus interface


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
     

Member of DIN ISO 9001 Unitec

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