ABSOLUTE MULTI-TURN ENCODER | HMT25
Introduction
The HMT25 geared multi-turn encoder provides absolute position
information over multiple turns of the input shaft. It keeps track of the
exact position even during periods of power loss without the need for
a battery backup. The HMT25 series is capable of outputs up to 4096
counts per turn and can count up to 4096 turnsa total of 24 bits or
16,777,216 positions. Units are enclosed in a 2.5- inch diameter sealed
package to withstand rugged environments and they carry an IP 66
environmental rating. These encoders meet the long travel and high
resolution requirements of robotics, rolling mills, rotary tables, cable
winding, printing, converting and material handling systems.
SPECIFICATIONS
Mechanical
Shaft Diameter: 0.375 (0.5 optional)
Flat on Shaft 0.80 long x 0.030 deep
40 lbs axial, 36 lbs radial (90 lbs axial
Shaft Loading
and 80 lbs radial with 0.5 shaft)
Shaft Runout 0.0005 TIR at midpoint of shaft
Starting Torque at 25C 2.5 in-oz (max)
Bearings Dual, preloaded, Class ABEC 7
Shaft Material 416 stainless steel
Bearing Housing Die cast aluminum with protective finish
Cover Die cast aluminum
10
Bearing Life 1 x 10 at 10% rated load
Maximum RPM 6,000 (see frequency response, below)
-4 2
Moment of Inertia 4.3 x 10 oz-in-sec
Weight 16 oz nominal
Electrical
Code Natural binary, gray code or SSI
Counts per Shaft Turn 4096, 12 bits
Number of Turns up to 4096, 12 bits
Supply Voltage 528 VDC
Current Requirements 130 mA typical + load, 250mA (max)
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Copyright 2018 Sensata Technologies, Inc. www.sensata.com(See note 3)
28V/V: Line Driver, 528 VDC in, V = V
out in
Voltage/Output 28V/5: Line Driver, 528 VDC in, V = 5 VDC
out
28V/OC: Open Collector, 528 VDC in, OC
out
SSI: 528 VDCin/5Vout (see back page)
Frequency Response 100 kHz
Overvoltage, reverse voltage.
Protection Level
Outputs short-circuit protected (1 minute max)
Output Termination Pinouts See Tables, below
Enviromental
Enclosure Rating IP66
Operating, 0 to 70 C; Extended, -40 to +85C;
Temperature
Storage, -20 to 90 C (to -40 if extended range is called out)
Shock 50 gs 11 msec
Vibration 0.3 gs ramp to 20 gs from 5 to 40 Hz and 20 gs from 40 Hz to 2000 Hz
Humidity 98% Non-condensing
NOTES & TABLES: All notes and tables referred to in the text can be found at the end of this specification.
1
HMT25 OUTPUT TERMINATIONS FOR PARALLEL OUTPUT
2 2 2 2
PIN FUNCTION PIN FUNCTION PIN FUNCTION PIN FUNCTION
A T11(MSB) J T3 T F7 b N/C
B T10 K T2 U F6 c LATCH
C T9 L T1 V F5 d DIR CONTROL
ENABLE
D T8 M T0 W F4 e
(Option)
E T7 N F11 (MSB) X F3 f N/C
F T6 P F10 Y F2 g O V
G T5 R F9 Z F1 h + V
H T4 S F8 a FO (LSB) j CASE GND
(1) Parallel output uses a MS3112E18-32P, 32 Pin connector on the encoder body (2) TXX = Turns counts, FXX = Fine resolution counts
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Copyright 2018 Sensata Technologies, Inc. www.sensata.com