Inside US: +1 (877) 432-9908

Bulletin No. ZMD-C

Outside US: +1 (717) 767-6511

Drawing No. LP0733

www.redlion.net

Released 2017-05-02

-1-

Model ZMD ‐ Miniature Length Sensor (Relplaces Model LSM)

DESCRIPTION 

Designed for light to medium duty sensing applications, the Miniature

Length Sensor, Model ZMD, is compact in size and easy to use.

It features a built-in spring-loaded torsion arm that provides a simple to

adjust torsion load, allowing the unit to be mounted in almost any

orientation, including upside down. Using a 6" or 200 mm wheel, the ZMD

can be used on almost any surface, while operating at speeds up to 3000

feet per minute. The housing is a durable, conductive composite material

that will eliminate static build up. Whether you need to measure speed,

position, or distances, the Model ZMD is the ideal solution. For other

pulse rates and/or wiring configurations, contact the factory for further

details.

OPEN COLLECTOR OUTPUT WIRING

The ZMD sensors have open collector outputs. An open collector

output brings the uncommitted collector of the encoder switching device

to the external world. Because the collector element is not associated

with the sensor supply voltage, the sensor output collector may be “pulled

up” to external voltages different than the encoder supply voltage (30

VDC maximum). NPN open collector outputs are current sinking devices.

An output signal will not be generated unless a pull-up resistor is

connected from the open-collector to the positive side of an external

supply. The same supply can be used for powering the unit and for the

pull-up resistor.

SAFETY SUMMARY

All safety related regulations, local codes and instructions that appear

in the literature or on equipment must be observed to ensure personal

safety and to prevent damage to either the instrument or equipment

connected to it. If equipment is used in a manner not specified by the

manufacturer, the protection provided by the equipment may be impaired.

SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

1. INPUT VOLTAGE: 4.75 to 28 VDC max for temperatures up to 85 ºC;

4.75 to 24 VDC for temperatures between 85 ºC to 100 ºC, reverse

polarity protected.

2. INPUT CURRENT: 100 mA max (65 mA typical) with no output load

mA max. current. Incremental - Two square waves in quadrature with A

leading B for clockwise rotation, as viewed from the wheel side.

4. MAX FREQUENCY: 200 KHz standard

5. NOISE IMMUNITY: Tested to BS EN61000-6-2; BS EN50081-2; BS

EN61000-4-2; BS EN61000-4-3; BS EN61000-4-6, BS EN500811

(Tested with 2 meter cable)

6. SYMMETRY: 180º (±18º) electrical

7. QUAD. PHASING: 90º (±22.5º) electrical

8. MIN. EDGE SEP: 67.5º electrical

9. ACCURACY: Within 0.017º mechanical or 1 arc-minute from true

position. (for PPR>189)

MECHANICAL SPECIFICATIONS

1. MAXIMUM MECHANICAL SPEED: 6000 RPM. Higher speeds may be

achievable, contact the factory.

2. SHAFT MATERIAL: Stainless Steel

3. SHAFT TOLERANCE: +0.0000/-0.0004" (+0.000/-0.010 mm)

4. RADIAL SHAFT LOAD: 5 lb. max. Rated load of 2 to 3 lb for bearing

5. AXIAL SHAFT LOAD: 5 lb. max. Rated load of 2 to 3 lb for bearing life

6. STARTING TORQUE: 0.05 oz-in

7. ELECTRICAL CONNECTION: 2 meter Cable, (foil and braid shield, 24

AWG conductors). Drain wire internally connected to case.

WARNING - EXPLOSION HAZARD - DO NOT D

EQUIPMENT UNLESS POWER HAS BEEN SW

OR AREA IS KNOWN TO BE NON-HAZARDOU

CAUTION: Risk of Danger.

Read complete instructions prior to installation

and operation of the unit.

FUNCTION

WIRE COLOR

+VDC

Red

Com

Black

AWhite

BGreen

Shield

Bare

DIMENSIONS In inches (mm)

6.000 CIRCUMFERENCE (ordered separately)

Metric wheel available

"L"

SIDE

Ø0.2498 (Ø6.345)

1/4 - 20 THREADS

SHAFT CAN BE REVERSED FOR

MOUNTING FROM EITHER SIDE

"R"

SIDE

CABLE LENGTH

2 meter STANDARD

TORQUE ADJUSTMENT

UNDER RUBBER CAP

Ø

1.71 (43.4)

1.00 (25.3)

1.3 (33)

TYPICAL

0.740 (18.8)

0.100 (2.54)

"R" SIDE

0.60 (15.2)

0.50 (12.6)

0.24 (6)

"L" SIDE

3.13 (79.6)

2.500 (63.5)

Tolerance: x.xxx" = ±0.005"

x.xx" = ±0.01"