OPE2275S Optek Technology, Inc., OPE2275S Datasheet - Page 4

• Manufacturer Part Number: OPE2275S
• Description: Incremental Shaft Encoder
• Manufacturer: Optek Technology, Inc.

Incremental Shaft Encoder
OPE1275S Single Channel (Tachometer)
OPE2275S Dual Channel
Issue A
Page 4 of 4
10/09
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Timing Definitions:
Timing Diagram:
PPR = Pulses Per Revolution
Electrical Degree (°e) = 1/360th of 1 cycle
Cycle = 360 electrical degrees (°e)
Symmetry = Relationship between X & Y in electrical
Position Error = The difference between the actual
Quadrature: The lead or lag difference between
Cycle Error = The difference between the actual shaft
Rise Time = Time required to switch between 10% and
Fall Time = Time required to switch between 90% and
Phone: [phone] or [phone]
degrees (°e).
shaft position and the position indicated by
the encoder cycle count.
channels “A” and “B” in electrical degrees
(normally 90°e)
rotational position and the cycle count
rotational position.
90% of the highest to lowest signal levels.
10% of the highest to lowest signal levels.
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
FAX: [phone] [e-mail] www.optekinc.com