Dual Axis Programmable Tilt Switch
Instruction ManualRev G©2020 - The Fredericks Company
2400 Philmont Avenue
Huntingdon Valley, PA 19006
web: www.frederickscompany.com
email: sales@frederickscompany.com
tel: +1 215-947-2500
fax: +1 215-947-7464©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

0729-1736-99 rev G Page 1 of 9

Table of Contents
1.

2.

3.

4.

5.

Product Information..................................................................................................................... 3

1.1
1.2
1.3
1.4
1.5

Description ................................................................................................................................................. 3
Specifications .............................................................................................................................................. 3
Physical Specifications ................................................................................................................................ 4
RS-232 Settings ........................................................................................................................................... 4
Related Products ........................................................................................................................................ 42.1
2.2
2.3
2.4

Direction of Measurement ......................................................................................................................... 5
Mounting .................................................................................................................................................... 5
Electrical Connections ................................................................................................................................ 5
Relay Connection ........................................................................................................................................ 5

3.1
3.2
3.3

Zeroing the Switch ...................................................................................................................................... 6
Setting Trip Angle ....................................................................................................................................... 6
Setup Mode Commands ............................................................................................................................. 7

4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8

Reset Zero Position ..................................................................................................................................... 7
Trip Delay .................................................................................................................................................... 7
Return Delay ............................................................................................................................................... 7
Relay Polarity .............................................................................................................................................. 7
Hysteresis ................................................................................................................................................... 8
Filter Value.................................................................................................................................................. 8
View Current Configuration ........................................................................................................................ 8
Cancel Command ........................................................................................................................................ 8

Installation ................................................................................................................................... 5

Set Trip Angle ............................................................................................................................... 6

Additional Configuration .............................................................................................................. 7

Command Reference .................................................................................................................... 9©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

0729-1736-99 rev G Page 2 of 9

1. Product Information
1.1 Description
1.1.1

The 0729-1736-99 Dual Axis Programmable Tilt Switch utilizes a 0717-4319-99 Fredericks
TrueTilt™ wide range electrolytic tilt sensor and signal conditioner. Its robust plastic housing andepoxy potting provide excellent durability and environmental protection. This tilt switch has
superior accuracy and unit to unit performance with a low profile and economic design making it
an ideal solution for a versatile range of applications in many sectors.
The tilt switch has been designed with the ability to be pre-programmed via an RS232 link to beadaptable for many applications. These features can be preset by the factory to customer
specifications or by the end user. With one basic model all features can be preset such as - set
trip angles, set zero position, set trip delay (on and off), set polarity of relay (normally on or off),
set hysteresis (return from trip point angle) and set filter value (eliminate vibrations). Thesevalues will be permanently saved to internal memory.

1.1.2For more than 80 years Fredericks has been a global provider and U.S. manufacturer of highperformance tilt measurement products. Built to last, our products are made with state-of-theart sensing technology, proven processes, and an intrinsic passion for the trade. Offering simple
integration and quality and safety benchmarks, our customers benefit not just from standardsetting reliability, but from our commitment to competitive pricing and performance. For more
information, visit our website at www.frederickscompany.com.

1.2 Specifications
OutputSupply Voltage
Supply Current
Relay Max Voltage
Relay Max Current
Operating Range
Minimum Trip Angle
Axes
Null Offset
Repeatability
Trip Accuracy
Output Trip Delay (see 4.2)
Output Return Delay (see 4.3)
Output Hysteresis (see 4.5)
Output Filter (see 4.6)
Cross Axis (Roll) Sensitivity
Long Term Stability/Drift
Operating Temperature
Storage Temperature
IP RatingRelay
7 V DC to 30 V DC
30 mA @ 12 V DC
30 V DC
2A @ 30 V DC
±35°
±1°
2
≤5°
±0.1°
±0.2°
1 sec (default)
0.5 sec (default)
0.25° (default)
0 sec (default)≤0.025° per degree≤0.1° per degree-40 °C to 85 °C-40 °C to 125 °C
IP66©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

0729-1736-99 rev G Page 3 of 9

1.3 Physical Specifications
Housing
LengthWidth
HeightCable LengthHole Center
Hold Diameter
WeightABS Plastic
53 mm (2.10”)79 mm (3.12”)
27 mm (1.08”)
45.7 cm (18”)
89 mm (3.50”)
5 mm (0.19”)
150 g

1.4 RS-232 Settings
Baud Rate
Data Bits
ParityStop Bits

9600
8None
11.5 Related Products
Description±45° Range, ±0.1° Repeatability Tilt Switch (RS-232/Relay)±45° Range, ±0.1° Repeatability Tilt Switch (Open Collector)±45° Range, ±0.1° Repeatability Tilt Switch (Open Collector)

Part Number
0729-1763-XX
0729-1757-99
0729-1758-99

Visit us online at www.frederickscompany.com to see our entire collection of tilt switches and inclinometers.

©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

0729-1736-99 rev G Page 4 of 9

2. Installation
2.1 Direction of Measurement

2.2 Mounting
2.2.1

The tilt switch must be mounted horizontally (parallel to the surface of the earth andperpendicular to the force of gravity). For best performance, mount the unit somewhere it will
be isolated from vibrations.

2.3 Electrical Connections
Wire Color
RedBlack
OrangeGreen
VioletBlue
Brown
Yellow

Signal NameVCC
GNDCNONC
Rx
Tx

Direction
Input
Input
Input
OutputOutputInput
OutputDescription
Supply Voltage Input: +7 to +35 V DC Regulated
GroundZero Set
Relay (Common)
Relay (Normally Open)
Relay (Normally Closed)
RS-232 Receive
RS-232 Transmit

2.4 Relay Connection
2.4.1

The relay is connected using the C (Common), NO (Normally Open), and NC (Normally Closed)
wires. When the switch is in the un-tripped state, NC will form a closed circuit with C, and NO will
be an open circuit. When the switch is tripped, NC will become an open circuit, and NO willconnect to C. These two states are shown below.
Un-tripped (closed)

Tripped (open)

CCNO

NCNONC©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

0729-1736-99 rev G Page 5 of 9

2.4.2

Both outputs can be used to trigger external actions. This is shown in the diagram below.

2.4.3

Note that NC and NO only have this behavior with the default polarity of 0. Their behavior will
be reversed if the polarity is 1. That is, NC will be open when level and NO will be closed whenlevel. For more information, see 4.4.

3. Set Trip Angle
3.1 Zeroing the Switch
3.1.1

Zero Wire
3.1.1.1 If the switch is not mounted at true zero tilt, it may be necessary to zero the switch.
Note that the switch can only be zeroed to within ±5° tilt.
3.1.1.2 First, ensure the switch is at the zero position and powered off.
3.1.1.3 Connect the zero wire (orange) to ground, then power the switch.
3.1.1.4 After 3 seconds, remove the wire from ground. Both LEDs should illuminate. The red
LED will blink 3 times if the operation was successful.

3.1.2

RS-232
3.1.2.1 Ensure the switch is at the zero position and powered on.
3.1.2.2 Connect to the switch over RS-232.
3.1.2.3 Enter the ‘Z’ (uppercase) command to zero the switch.

3.2 Setting Trip Angle
3.2.1

The tilt angle can only be adjusted when the switch is in setup mode. Use the ‘set’ command to
put the switch in setup mode.

3.2.2

Select which axis to adjust using the ‘x’ and ‘y’ commands.

3.2.3

The ‘+’ and ‘-‘ commands can then be used to adjust the trip angle by 0.1°.

3.2.4

Use the ‘S’ command to save the adjustment.

©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

0729-1736-99 rev G Page 6 of 9

3.3 Setup Mode Commands
Commandsetxy+SESCDescriptionEnter Setup
Select X Axis
Select Y Axis
Increment Trip Angle by 0.1°
Decrement Trip Angle by 0.1°
Save Trip Angle
Cancel and Exit Setup

4. Additional Configuration
4.1 Reset Zero Position
4.1.1

Use the ‘Z’ command to reset the zero position of the tilt switch.

4.2 Trip Delay
4.2.1

Trip delay is how long the switch must pass the trip angle before triggering the relay output toswitch.

4.2.2

To set trip delay, use the ‘d’ command. Then, enter 0 to 9 to set the delay. The delay length willbe the number you enter times 0.5 seconds.

4.2.3

For example, the following command will set the trip delay to 3.5 seconds:
d7

4.3 Return Delay
4.3.1

Return delay is how long the switch must stay within the trip angle after tripping to switch therelay output.

4.3.2

To set return delay, use the ‘r’ command. Then, enter 0 to 9 to set the delay. The delay length
will be the number you enter times 0.5 seconds.

4.3.3

For example, to set the return delay to 2 seconds, use the following command:r4

4.4 Relay Polarity
4.4.1

Relay polarity determines the outputs of the switch. With a polarity of 1, the NO and NC outputs
will be reversed. This is 0 by default.

4.4.2

Relay polarity is set using the ‘p’ command, followed by either ‘0’ or ‘1’ depending on the desiredpolarity.

4.4.3

For example, the following command will set the polarity to 1:
p1©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

0729-1736-99 rev G Page 7 of 9

4.5 Hysteresis
4.5.1

The hysteresis is how far the sensor must return past the trip angle towards level to un-trip. Thisis done to remove oscillations.

4.5.2

For example, say a sensor has a hysteresis value of 1° and a trip angle of 10°. If the sensor ismoved from 0° to 10°, the switch will trip. If the sensor is then moved from 10° to 9.5°, theswitch will stay tripped because it is still within the hysteresis value. Moving to 9° would return
un-trip the switch.

4.5.3

To set the hysteresis value, use the ‘h’ command, followed by a number 1 to 8. The hysteresis
value will the be number entered times 0.25°.

4.5.4

For example, to set the hysteresis to 0.75, use the following command:h3

4.6 Filter Value
4.6.1

The filter value is an averaging filter used to smooth the tilt before operating on it. The value it is
set to determines how many seconds to average measurements together. This is used to filterout vibrations, resulting in a smoother measurement.

4.6.2

For example, say the filter value is 1.072 seconds. Rather than comparing the most recent
measurement with the trip angle, it will average all measurements taken in the past 1.072
seconds. This average will then be compared with the trip angle.

4.6.3

To set the filter value, use the ‘f’ command, followed by a number 0 to 9. The filter time will be
the number entered times 0.268 seconds.

4.6.4

For example, the following command will set the filter value to 0.536 seconds:
f2

4.7 View Current Configuration
4.7.1

Use the ‘q’ command to get the current configuration of the switch.

4.8 Cancel Command
4.8.1

Before completing any command, you can press ‘ESC’ to cancel the command.

©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

0729-1736-99 rev G Page 8 of 9

5. Command Reference
Command?
setxy+SZ
drphfqESC

Description
Show all commands
Enter setup mode
Select the X axis for setup
Select the Y axis for setup
Increment the selected axis’s trip angle by 0.1°
Decrement the selected axis’s trip angle by 0.1°
Save new trip angles
Reset zero position of the tilt switch
Set trip delay (default 1 second)
Set return delay (default 0.5 seconds)
Set polarity (default 0)
Set hysteresis value (default 0.25°)
Set filter value (default 0 seconds)
Show configuration settings
Cancel the current command

Inputs0 to 9 (times 0.5 seconds)
0 to 9 (times 0.5 seconds)
0 or 1
1 to 8 (times 0.25°)
0 to 9 (times 0.268 seconds)©2020 The Fredericks Company | www.frederickscompany.com | sales@frederickscompany.com | +1 215 947 2500

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