SLIM Tach RL67

SLIM Tach® RL67 Incremental Rotary Encoder

 SLIM Tach RL67
RIM Tach 1250

Quick Specs...

  • Unique mechanical design for Reliance RPM™ motors
  • Rugged, zero-speed, magnetoresistive sensing technology is unaffected by grease, salt water, dust, and other common contaminants

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Overview Industry/Application Specifications Related Info  

Overview / Design Principle:

The hard anodized aluminum alloy frame provides strength, ruggedness, and corrosion resistance. The hardened encapsulated electronics offer outstanding reliability under heavy machine vibration and accidental impacts. The electronics range from +5 to +15 volts DC and include the latest in short circuit proof design on all output pins. High power, complementary, line driver outputs assure clean, crisp signals over long cable lengths. These outputs are compatible with most drives or other input devices. The advanced magnetoresistive sensing technology operates with an unparalleled immunity to grease, oil, salt water, dirt, fibers, and other contaminants. This eliminates the need to seal the encoder.

The compact SLIM Tach® RL67 adds only 1.5” to the motor length. Designed to maximize the ease of field installation, the RL67 retrofits onto older existing motors as well as new motors. In some cases, it may be necessary to change the accessory stub shaft in the motor. This stub shaft is also available from us.

The SLIM Tach® RL67 will mount directly in the 6.75” machined accessory recess of the 4.5” accessory flange found on the motor. This unique modular design mounts quickly and easily with no adapter plates, bearings, or flexible couplings. Installation can be completed in minutes, without gap adjustments or special tools. The encoder can be removed then reinstalled just as easily.

Features and Benefits:

  • Modular, bearingless, low profile “pancake” design adds only 1.5” to motor length
  • 5-15 VDC operation with bi-directional quadrature and signals, with high power differential line driver outputs
  • 64, 128, 256, 512, 1024 & 2048 pulses per revolution (PPR) with optional Index pulse
  • Up to 120°C operational temperature


The SLIM Tach® RL67 heavy duty encoder is a breakthrough innovation in feedback technology. Incorporating dual mounting features, the RL67 was designed especially for Reliance Electric, Inc. RPM® AC or DC motors.

Standard Operating Characteristics
Code: Incremental
Pulses per Revolution: 60-2048
Phasing Sense: A leads B for Counter-Clockwise rotation (CCW) viewing encoder-mounted end
Quadrature Phasing: 90° ± 22°
Symmetry: 180° ± 54°
Index: 270° gated to falling B edge

Input Voltage Requirement: 5-15 or 5-26 Volts DC
Current Requirement: With Electrical Option L or H: 45 mA typical per sensor module plus line driver load
With Electrical Option V or 5: 65 mA typical per sensor module plus line driver load
Output Signals: With Elec Option L or H: 5-15 V Line Driver, 150mA
With Elec Option V: 5-26 V Line Driver, 100mA
With Elec Option 5: 5V Line Driver, 150mA
Frequency Response: 0 - 120kHz Data & Index
Electrical Immunity: 2kV ESD, Reverse Polarity, Short Circuit
Connector: 10 pin industrial duty latching, sealed NEMA 4 &12, IP65

Shaft Speed: 5,000 RPM
Mounting Configuration: 4.5” diameter, 56 C motor face or accessory flange to meet NEMA MG1-4 standards or mounts directly in the 6.75” machined accessory recess of the 4.5” accessory flange found on Reliance RPM™ motors
Housing Material: Cast Aluminum
Acceleration Rate: 12,000 rpm/sec max
Shaft Length Required: 2.5” min
Allowable Shaft End-Play: ± 0.045”
Allowable Shaft Runout: 0.003” TIR

Operating Temperature Range: Std: -40°C to +90°C; Extended: -40°C to +120°C
Storage Temperature Range: -40°C to +120°C
Humidity: to 98% RH (non-condensing)
Shock (Sensor Module): 1 meter drop test, 30 G’s Min
Vibration: 18 G’s @ 5-2000 Hz spectrum

Available Specifications:

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