Thermo Scientific 61-12N-64P, Operating And Service Manual

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Ramsey Model 61-12N Speed Sensor REC 4374B Page 6
Unpacking and Inspection
The Model 61-12N-64P Speed Sensor has been properly packaged and inspected prior to shipment. Before
unpacking, be certain to check the package for external damage, as the carrier may often times be held
responsible for shipping damage.
Storage
The Model 61-12N-64P Speed Sensor can be safely stored indoors, between -50 and +85 degrees C (-58 to
+185 degrees F). The unit must be protected against moisture.
Specifications
Supply Voltage: 18-28 VDC
Application: Indoor/Outdoor use
Environment Rating: Type 4X, IP66
Supply Current: 30 mA max.
Output Current: 100 mA max. sinking current
Operating: -40°C to +80°C (-40º to +176ºF)
Temperature: T4 temperature identification
Speed: 350 RPM maximum
Pulse Output Rate: 64 pulses per shaft revolution
Cable Length: 20 AWG (Belden #8772 or equal), up to 500 feet (150 meters)
18 AWG (Belden #1036A or equal), 500 to 3000 feet (150 to 915 meters)
Entity Parameters for Class I, Div. 1: Ui = 28 volts, Ii = 93 mA, Pi = 660 mW
Humidity: 80% maximum relative humidity for temperatures up to 31°C
decreasing linearly to 50% relative humidity at 40°C.
Pollution Degree: 2
Overvoltage Category: I
Altitude: Up to 2000m
Installation
Overview
The Model 61-12N-64P Speed Sensor must be attached to a pulley shaft which turns at true conveyor belt
speed. Normally, the tail pulley shaft or a snubbing roll shaft satisfies this requirement. In installations where
the tail pulley or snubbing roll shaft is not accessible, an additional pulley must be installed specifically for the
speed sensor.