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1.2 General
These instructions do not claim to cover all details of variation in equipment or to provide for every possible contingency or
hazard to be met in connection with installation, operation, and service. Should further information be desired or should
particular problems arise which are not covered sufficiently for the purchaser's purposes, please contact NorthStar
Technologies, Inc., or one of its designated representatives.
1.3 Description
®
The SLIM Tach
HS56 is a high performance, reliable digital tachometer, designed to provide position and velocity feedback
from both AC and DC electric motors. The hollow shaft design allows ease of mounting on motors without accessory
mounting flanges. Simply slide the HS56 onto the shaft, attach the anti-rotation arm to the motor, and tighten down the set
screws that hold the unit onto the shaft. All of the critical alignments are already done for you in the encoder. The anti-
rotation arm is very forgiving to any axial or radial motions that the motor might have, yet is very torsionally non-compliant.
Similar to NorthStar's heavy duty and mill duty encoders, the SLIM Tach
technology. Magnetoresistive technology allows the NorthStar HS56 to be placed in the toughest environments. The unit is
resistant to grease, oil, water, and dirt, making the HS56 the most rugged hollow shaft encoder on the market today. Operating
voltages for the HS56 are 5-15 volts DC, and the electronics feature short circuit protection, reverse polarity protection, heavy
duty line drivers, and EMI noise resistance. NorthStar provides a heavy duty, water-tight mating Industrial connector. The
connector also features 1/2 inch NPT pipe thread for armored electrical conduit. The oversized, heavy duty bearings used in
this unit are sealed and lubricated for life.
Latching Connector Hood:
Slim-C01
Connections:
18" Pigtail cable
Latching Industrial Connector
Industrial Connector on 12" pigtail cable
Teather
5
NorthStar SLIM Tach
P
C
Q
Figure 1: HS56 Customer Outline Reference Dimensions
®
HS56 Instruction Manual
HS56 contains patented magneto-resistive
5 May 1999
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