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2000

Transmission range must be changed according to the environment.

Please check if system works properly on the site.

In the case of insufficient transmission range, use TR-20U (Repeater unit) 

to extend range.

Receiver/ Repeater

RC-20U/ TR-20U

TD-20U

Note: When you recycle this product, please disassemble product and recycle according to state law. 

TD-20U INSTALLATION INSTRUCTIONS

INDOOR/ OUTDOOR SENSOR TRANSMITTER

Please read this manual carefully before installation.

2   PARTS IDENTIFICATION

1   CAUTION

3   TRANSMISSION RANGE (REFERENCE)

2000ft (Open field, line of sight)

150ft (Stucco/Plaster construction)

100ft (Concrete construction)

6. Transmission range

    Transmission range may decrease under the following conditions: 

    - Either TD-20U or receiving unit installed on a metal surface. 

    - Presence of a steel door, reinforced concrete or other metal obstructions between 

      TD-20U and receiving units.

    - Places near strong radio sources such as broadcast stations or substation.

7. Battery replacement

    Replace battery every 2 years. Use only 9V alkaline battery.

8. Cleaning

    Harsh cleaners such as paint removers or benzene may ruin the surface. Use a soft wet 

    cloth and mild soap to clean.

1. Harsh environments

    Do not use the TD-20U outdoors under severe conditions as out of warranted  

    temperature, rapid temperature change, high humidity, steam, or smog.

    This may cause the unit to malfunction.

2. Impact/Shock 

    Impact or Shock can cause severe damage or break the TD-20U.

3. Light/Moving object

    Direct light or moving objects in front of the TD-20U can cause false alarms. 

4. Electric Devices

    Use the TD-20U at least 3ft(1m) away from any electronic devices such as TVs,    

    Radios, PCs, Microwave ovens or any other devices with an electric motors.

    This may cause the unit to malfunction.

5. Tampering

    Any changes or modifications not expressly approved by OPTEX could void the user’s 

    authority to operate the equipment.

 

FEATURES

• Compatible with RC-20U(Chime Box W/Relay), TR-20U(Repeater) and any receiver of WIRELESS 1000 series.

• 50ft. Long range & 17ft. fan pattern selectable.

• Can be installed on the wall, ceiling and desktop.

• Weatherproof structure(IP54) for indoor and outdoor applications.

• Over 8 million codes possible, eliminates interference from neighbors.

• Powered by a 9V alkaline battery(not included).

• Supervised low battery.

• LED indicator for verifying detection and low battery status.

Detection area adjustment knob

Inside of rear case

Rear 

case

Knockout 

(for mounting)

LONG

FAN

Detection area 

pattern display

Status 

indicator

Mask

Front case

Sensor window 

(lens)

FRONT

BACK

1)

2)

3)

1)

2)

3)

5   INSTALLATION HINT

Fan Pattern

Front View

Long Range

Front View

Over a doorway

Mounted on a 

counter, looking 

across a doorway

Mounted on a wall, 

looking across a 

doorway

To cover the area 

straight ahead or for 

short range coverage

For covering the right

or left side 

Mounted on a 

counter, looking 

across a doorway

LO

NG

FA

N

LONG

FAN

LONG

FAN

LONG

FAN

LO
NG

FA

N

LONG

FAN

LONG

FAN

LO

NG

FA

N

LONG

FAN

LO

NG

FA

N

LO

NG

FA

N

LO

NG

FA

N

LONG

FAN

1 2 3 4 5

1 2

3 4

5

How To Choose the detection area pattern

1. Use a screwdriver to 

    open the casing.

2. Choose from the two 

    detection area 

    patterns by pointing 

    the arrow to either

.

“F: fan pattern”

or

“L: long range.”

3. Turn the mask to 

the optimal position 

for the detection 

area pattern you 

have chosen. 

This 

mask is adjustable 

clockwise 

/counterclockwise 

(±90°), horizontally 

(±5°) and vertically 

(±45°).

NOTE:

If there is an area within the fan-pattern detection area

that you do not want to include, mask part of the lens with a tape.

4   DETECTION AREA PATTERN 

Fan Pattern(Default setting)

Selecting the appropriate detection area pattern for the TD-20U enhances its detection ability and immunity against false alarms. The TD-20U is shipped to you in the fan pattern setting,

but you can easily select either fan or long range. Select the long range detection area for Drive-Up announcer 

applications.

Height 

8ft

(2.5m)

10ft

(3m)

13ft

(4m)

17ft

(5m)

Area

Width 

×

 Length

7ft 1ft

(2.1m) × (0.3m)

   8ft 1.3ft

(2.5m) × (0.4m)

 11ft 1.6ft

(3.4m) × (0.5m)

14ft 2ft  

(4.2m) × (0.6m)

Long Range

Pet Alley

50ft (15m)

9ft

(2.8m)

6ft

(1.8m)

2.6ft (80cm)

2.6ft (0.8m)

LONG

FAN

Detection direction

Detection

LONG

FAN

Detection direction

Detection

Length

Height

Width

(Long range setting)

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