Electric Company Water Heater User Manual

2-34 Installation & Operation MN1800
Renishaw RGH22 series Open Type Metal Scale
Encoder type: Non contact optical, metal scale, open type. Open scale linear encoders
are used primarily where environmental conditions are clean, dry and free of oils. Due to
the fragile nature of the encoder scale, extra care should be taken to prevent physical
damage from impact or abrasion.
Mechanical design: Metal scale, optical scanning unit, high flex twisted shielded cable.
Encoder is adhered to stage surface with a two part, releasable bonding agent. (DO NOT
attempt to remove the scale from the stage surface, for this will permanently damage the
encoder scale. Contact Baldor or an authorized distributor for assistance)
Maintenance: The encoder scale can be cleaned with alcohol. Avoid chemicals such as
acetone, MEK, and other solvents and soaps that can damage the scale or leave a film.
The encoder optical scanning unit should be treated with great care as not to scratch or
mar the external read head surface. If cleaning is required, the encoder read head
surface can be cleaned with alcohol. (Avoid submersion). Using a cotton swab, lightly
wipe clean the contaminated surfaces. If removal of the encoder optical read head is
required, consult with Baldor or an authorized distributor.
Wiring diagram: (for flying leads, high flex cable)
Color Description Function
Brown +5VDC Encoder Power
White 0VDC Encoder GND
Green A+ Incremental Signal
Yellow A– Incremental Signal
Blue B+ Incremental Signal
Red B– Incremental Signal
Violet C+ Incremental Signal
Gray C– Incremental Signal
Pink Limit Limit
Black Alarm+ Alarm
Orange Alarm– Alarm
Clear X External Setup
Inner Shield Inner Shield (Connect to 0VDC, Logic Ground)
Outer Shield Outer Shield (Connect to Earth Ground)
Technical Data:
Encoder Type: Digital output, metal scale
Input power: 5VDC, 120mA
Output: A/B quadrature and reference marks, differential line drive output
Resolution: 0.1, 1.0, 5.0 micron
Accuracy: ±1–3 micron after scaling*
Reference mark: ±one count (bidirectional), Asynchronous pulse Q
Available on specific heads only, provides end of travel home
position.
* Scaling is a calibration technique used to determine and communicate linear encoder
and positioning stage mechanical characteristics, (accuracy and resolution) to the
motion controller.
Note: Max speed is determined by the encoder resolution, the controller’s band
width and the mechanical limitations of the positioning stage. Should you
need assistance in calculating the maximum speed for the positioning stage,
please consult with Baldor.