Product Category

Rugged Incremental 50-mm-dia. Rotary Encoder


Rugged Rotary Encoder





Power supply voltage

12 VDC -10% to 24 VDC +15%,
 ripple (p-p): 5% max.

5 VDC -5% to 12 VDC +10%,
 ripple (p-p): 5% max.

Current consumption

100 mA max.


100, 200, 300, 360, 500, 600, 720, 800, 1,000, 1,024, 1,200, 1,500, 1,800, 2,000, 2,048,
 2,500, 3,600

Output phases

Phases A, B, and Z *5


Output configuration

Complementary outputs *2

Voltage output (NPN output)

Line driver output *3

Output capacity

Output voltage:
 VH = Vcc = 3 V min.
 (IO = 30 mA)
 VL = 2 V max.
 (IO = -30 mA)
 Output current: ±30 mA

Output resistance: 2 kΩ
 Output current: 35 mA max.
 Residual voltage: 0.7 V max.

AM26LS31 equivalent
 Output current:
 High level: IO = -10 mA
 Low level: IS = 10 mA
 Output voltage:
 VO = 2.5 V min.
 VS = 0.5 V max.

Maximum response
 frequency *4

125 kHz (65 kHz when using phase Z reset)

Phase difference
 between outputs

90°±45° between A and B (1/4 T ± 1/8 T)

Rise and fall times of

1 μs max.
 (Cable length: 2 m,
 Output current: 30 mA)

1 μs max.
 (Cable length: 2 m,
 Output current: 35 mA)

1 μs max.
 (Cable length: 2 m,
 IO: -10 mA, IS: 10 mA)

Starting torque

10 mNm max. at room temperature, 30 mNm max. at low temperature

Moment of inertia

2.0 × 10-6 kgm2 max.; 1.9 × 10-6 kgm2 max. at 500 P/R max.



80 N


50 N

Maximum permissible

5,000 r/min

Protection circuits

Output load short-circuit protection


Ambient temperature

Operating: -10 to 70°C (with no icing), Storage: -25 to 85°C (with no icing)

Ambient humidity

Operating/Storage: 35% to 85% (with no condensation)

Insulation resistance

20 MΩ min. (at 500 VDC) between current-carrying parts and case

Dielectric strength

500 VAC, 50/60 Hz for 1 min between current-carrying parts and case

Vibration resistance

Destruction: 10 to 500 Hz, 150 m/s2 or 2-mm double amplitude for 11 min 3 times each in
 X, Y, and Z directions

Shock resistance

Destruction: 1,000 m/s2 3 times each in X, Y, and Z directions

Degree of protection

IEC 60529 IP65, in-house standards: oilproof

Connection method

Pre-wired Models (Standard cable length: 1 m)


Case: Aluminum, Main unit: Aluminum, Shaft: SUS303

Weight (packed state)

Approx. 300 g


Instruction manual
 Note: Coupling, mounting bracket and hex-head spanner are sold separately.

1. An inrush current of approximately 9 A will flow for approximately 0.1 ms when the power is turned ON.
 2. Complementary Output The complementary output has two output transistors (NPN and PNP) as shown below. These two output transistors alternately turn ON and OFF depending on the high or low output signal. When using them, pull up to the positive
 power supply voltage level or pull down to 0 V. The complementary output allows flow-in or flow-out of the output current and thus the rising and falling speeds of signals are fast. This allows a long cable distance. They can be connected to open-collector input devices (NPN, PNP).


3. The line driver output is a data transmission circuit compatible with RS-422A and long-distance transmission is  possible with a twisted-pair cable. (AM26LS31 equivalent)
 4. The maximum electrical response speed is determined by the resolution and maximum response frequency as follows:


This means that the Rotary Encoder will not operate electrically if its speed exceeds the maximum electrical response speed.
 5. The phase Z signal is output when cut face D on the shaft and the cable connection direction are as shown in the following diagram (output position range: ±15°).