BEI Sensors HMT25 Absolute Multi-Turn Encoder - Manual

Tel: 805-968-0782 /800-350-2727 | Fax: 805-968-3154 / 800-960-2726
7230 Hollister Ave., Goleta, CA 93117-2807 | www.beisensors.com
Specification No. 02083-001 Rev.08-11
These commodities, technology or software if exported from the United States must be in accordance with the Bureau of Industry, and Security, Export Administration regulations. Diversion contrary to U.S law is prohibited.
HMT25 Absolute Multi-Turn Encoder
The HMT25 geared
multi-turn encoder
provides absolute posi-
tion information over
multiple turns of the
input shaft. It keeps
track of the exact posi-
tion 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 turns—a 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, convert-
ing and material handling systems.
Mechanical Specifications
Shaft Diameter: 0.375” (0.5” optional)
Flat on Shaft: 0.80” long x 0.030” deep
Shaft Loading: 40 lbs axial, 36 lbs radial (90 lbs axial
and 80 lbs radial with 0.5” shaft)
Shaft Runout: 0.0005 TIR at midpoint of shaft
Starting Torque at 25°C: 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
Bearing Life: 1 x 10 10 at 10% rated load
Maximum RPM: 6,000 (see frequency response, below)
Moment of Inertia: 4.3 x 10 -4 oz-in-sec 2
Weight: 16 oz nominal
Electrical Specifications
Code: Natural binary, gray code or SSI
Counts per Shaft Turn: 4096, 12 bits
Number of Turns: up to 4096, 12 bits
Supply Voltage: 5–28 VDC
Current Requirements: 130 mA typical + load, 250mA (max)
Voltage/Output: (See note 3)
28V/V: Line Driver, 5–28 VDC in, V
out
= V
in
28V/5: Line Driver, 5–28 VDC in, V
out
= 5 VDC
28V/OC: Open Collector, 5–28 VDC in, OC
out
SSI: 5–28 VDCin/5Vout (see back page)
Frequency Response: 100 kHz
Protection Level: Overvoltage, reverse voltage.
Outputs short-circuit protected (1 minute max)
Output Termination Pinouts: See Tables, back page
Environmental Specifications
Enclosure Rating: IP66
Temperature: Operating, 0° to 70° C; Extended, -40° to +85°C;
Storage, -20° to 90° C (to -40° if extended range is called out)
Shock: 50 g’s 11 msec
Vibration: 5 to 2000 Hz @ 20 g’s (see special note back page)
Humidity: 98% Non-condensing
NOTES & TABLES: All notes and tables referred to in the text
can be found on the back of this page.
The H25 Incremental Encoder is avail able with the following certification:
EN 55011 and EN 61000-6-2
CODE TYPE:
GC = Gray Code
NB = Natural Binary
HOUSING :
D = Square Flange
E = Servo mount
HMT25 Multi-Turn Encoder Ordering Options
FoR ASSiSTANCe CAll 800-350-2727
Use this diagram, working from left to right to construct your model number (example: HMT25D-SS-12X12GC-28V/V-CW-SM18/32).
All notes and tables referred to can be found on the back of thispage.
TYPE:
Heavy Duty
Multi-trun
2.5 inch Dia.
FACE MOUNTS:
F1 = 3,10–32,1.875 BC
F4 = 3, 6–32, 2.00 BC
NUMBER OF TURNS:
4 = 16 turns
8 = 256 turns
12 = 4096 turns
COUNTS PER TURN:
12 = 4096 counts
OUTPUT
TERMINATION:
E = End
S = Side
SPECIAL FEATURES:
S= Special features
specified on purchase
order (consult factory)
See note 4
SHAFT SEAL
CONFIGURATION:
SS = Shaft Seal
See note 2
VOLTAGE/OUTPUT:
28V/V = 5–28Vin/out
28V/5 = 5–28Vin/5Vout
28V/OC = 5–28Vin/OCout
S3 = SSI Compatible
A1 = 4–20mA
A2 = 0–10V
DIRECTION OF COUNT:
CW = Clockwise increasing count
CCW = Counter clockwise
increasing count
CONNECTOR:
M18/32 = 32 pin
Parallel output
M18 = 10 pin
(A1, A2 and S3 only)
HMT25 X