Omega SP-013 User manual

TM
User’s Guide
Shop online
at
omega.com
e-mail: [e-mail]
For latest product
manuals:
www.omega.com/en-
us/pdf-manuals
SP-013
Layer N Digital Pulse Smart Probe

2 | M5751
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains and reserves
the right to alter specifications without notice.
omega.com [email protected]
Omega Engineering, Inc:
800 Connecticut Ave. Suite 5N01, Norwalk, CT 06854, USA
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: [phone]
e-mail: [email protected]m
Fax: [phone]
Omega Engineering,
Limited:
1 Omega Drive, Northbank,
Irlam Manchester M44 5BD
United Kingdom
Omega Engineering,
GmbH:
Daimlerstrasse 26 75392
Deckenpfronn Germany

3 | M5751
Table of Contents
1Notes, Warnings, and Cautions .................................................................................................................... 5
2Introduction................................................................................................................................................. 6
3Specifications............................................................................................................................................... 7
4Hardware Setup........................................................................................................................................... 8
4.1 Connecting to your Layer N Smart Interface ...................................................................................................... 8
4.2 Digital Input Wiring Diagram ............................................................................................................................ 8
4.3 Discrete I/O ..................................................................................................................................................... 8
5SYNC Configuration...................................................................................................................................... 9
5.1 Connecting to SYNC - Automatic Detect ............................................................................................................ 9
5.2 Connecting to SYNC – Manual........................................................................................................................... 9
5.2.1 Communication Interface.................................................................................................................................... 9
5.3 Input Configuration.........................................................................................................................................11
5.3.1 Digital Inputs Interface...................................................................................................................................... 11
5.3.1.1 Pulse Measurements................................................................................................................................................... 12
5.3.2 Mixed Input Interface........................................................................................................................................ 16
5.3.2.1 Digital Inputs (Mixed Mode)........................................................................................................................................ 17
5.3.2.2 Process Inputs (Mixed Mode)...................................................................................................................................... 17
5.3.3 Discrete Input/Output (DIO) ............................................................................................................................. 18
5.3.3.1 Setting DIO as an Input................................................................................................................................................ 19
5.3.4 Advanced Scaling Options ................................................................................................................................. 19
5.4 Output Configuration ......................................................................................................................................21
5.4.1 Device Output Range/Types.............................................................................................................................. 22
5.4.1.1 ON/OFF Output Type .................................................................................................................................................. 22
5.4.1.2 Pulse-Width Modulation (PWM) Output Type............................................................................................................. 22
5.4.1.3 SERVO Output Type .................................................................................................................................................... 22
5.4.2 Sensor Output Mapping .................................................................................................................................... 23
5.4.3 ON/OFF Control Module ................................................................................................................................... 24
5.4.4 Setting an Alarm................................................................................................................................................ 25
6Pairing a Sensing Device to a Layer N Gateway .......................................................................................... 26
6.1 Wireless Pairing ..............................................................................................................................................26
6.2 Wired Pairing..................................................................................................................................................26
7Appendix: SP-013 Registers........................................................................................................................ 27
7.1 Digital Descriptor ............................................................................................................................................27
7.1.1 Digital Descriptor .............................................................................................................................................. 27
7.1.1.1 Digital Measurement Types......................................................................................................................................... 28
7.1.1.2 Digital Data Type/Format ............................................................................................................................................ 28
7.1.1.3 Digital Configuration ................................................................................................................................................... 28
7.1.2 Digital Input Device Byte ................................................................................................................................... 29
7.1.3 Digital Sensor Parameters ................................................................................................................................. 29
7.1.3.1 IPSO Digital Definition................................................................................................................................................. 30
7.1.3.2 Digital Resolution........................................................................................................................................................ 30
7.1.3.3 Sensor Trigger Function .............................................................................................................................................. 30
7.2 Process Input ..................................................................................................................................................30
7.2.1 Process Descriptor ............................................................................................................................................ 30
7.2.1.1 Process Measurement Types....................................................................................................................................... 31
7.2.1.2 Process Input Data Type/Format................................................................................................................................. 31
7.2.1.3 Process Input Configuration ........................................................................................................................................ 31
7.2.2 Process Device Byte .......................................................................................................................................... 32

4 | M5751
7.2.3 Process Sensor Parameters ............................................................................................................................... 32
7.2.4 Process IPSO Definition ..................................................................................................................................... 32
7.2.4.1 Process Resolution...................................................................................................................................................... 32
7.2.4.2 Process Sensor Trigger Function.................................................................................................................................. 32
7.3 DIO Interface ..................................................................................................................................................33
7.3.1 DIO Descriptor................................................................................................................................................... 33
7.3.1.1 DIO Sensor Type.......................................................................................................................................................... 33
7.3.1.2 DIO Data Type/Format ................................................................................................................................................ 33
7.3.1.3 DIO Input Configuration .............................................................................................................................................. 33
7.3.1.4 DIO Device Configuration............................................................................................................................................ 34
7.3.1.5 DIO IPSO Definition ..................................................................................................................................................... 34
7.3.1.6 Sensor Trigger Function .............................................................................................................................................. 34
7.4 Output Interface .............................................................................................................................................35
7.4.1 Scaling Minimum / Maximum Values................................................................................................................ 35
7.4.2 Output Values ................................................................................................................................................... 36
7.4.3 Output Names................................................................................................................................................... 36
7.5 Digital Output Configuration ...........................................................................................................................37
7.5.1 Rate ................................................................................................................................................................... 37
7.5.1.1 PWM Rate................................................................................................................................................................... 37
7.5.1.2 SERVO Rate ................................................................................................................................................................. 38
7.5.2 Output Type ...................................................................................................................................................... 38
7.5.3 Active State ....................................................................................................................................................... 38
7.5.4 Mapping Enabled .............................................................................................................................................. 38
7.5.5 Sensor Mapping ................................................................................................................................................ 38

5 | M5751
1 Notes, Warnings, and Cautions
If the equipment is used in a manner not specified in this manual, the protection by the equipment may be impaired.
Do not operate the equipment in flammable or explosive environments.
It is important to read and follow all precautions and instructions in this manual before operating or commissioning
this device as it contains important information relating to safety and EMC. Failure to follow all the safety
precautions may result in injury and/or damage to the equipment.
The following labels identify information that is especially important to note:
Note: Provides information that is important to successfully set up and use the SP-013.
Caution or Warning: Informs about the risk of electrical shock.
Caution, Warning, or Important: Informs of circumstances that can affect the functionality of the instrument and
must refer to accompanying documents.

6 | M5751
2 Introduction
The Layer N SP-013 Digital Interface Smart Probe provides an easy way to integrate digital pulse inputs into the Layer
N Ecosystem. The SP-013 accepts digital pulse inputs through its M12 5-pin connector and Layer N Smart Interfaces
through its M12 8-pin connector. The optional M12.8-T-SPLIT Sensor Splitter can be used to access the Discrete I/O
pins on the M12 8-pin connector. The optional M12.5-S-M-FM and M12.8-S-M-FM mating connectors can be utilized
to easily connect wire leads to the SP-013 or sensor splitter. The SP-013 may be configured to monitor the on/off
state of the input signals, the pulse rate/ duty cycle of the primary input, or the pulse delay between the two signals.
The pulse totalizing function supports both standard counting and up/down counting. A mixed-mode configuration
option allows for the measurement of one digital pulse input and one process input which may be independently
configured as a 0-24 mA, 0-1.0 VDC, or 0-2.0 VDC input.
The Layer N SP-013 features 2 configurable discrete I/O pins. These can be used for a myriad of applications including
driving relays, physical alarms, or sensing dry contacts like door switches. The SP-013 can also be utilized as an edge
controller, with autonomous independent decision-making capabilities to generate local alarms or provide control
outputs based on sensor inputs.
Included with the SP-013
•SP-013 Unit
•Quick Start Guide
Additional Material Needed
• A Layer N Smart Interface
• A Windows 7, 8, 9, 10, or 11 OS PC or laptop with
Omega’s free SYNC configuration software
•A Layer N Cloud account or a qualifying Omega Enterprise
Gateway license tier (Pro, Business, or Business Pro)
• A compatible Layer N Gateway
Optional Materials
•M12.8-T-SPLIT Sensor Splitter
•M12.8-S-M-FM Screw Terminal Accessory
IF-001
Layer N Smart
Interface
SP-013
M12.5-S-M-FM
Figure 2: Example SP-013 integrated into a Layer N ecosystem
M12.8-S-M-FM
Figure 1: SP-013 unit
M12.8-S-M-FM and
M12.8-T-SPLIT

7 | M5751
3 Specifications
INPUT POWER
Voltage: 2.8 VDC - 3.3 VDC
DIGITAL INPUT SIGNALS
ON: 1.0 VDC
OFF: 0.7 VDC
Internal Pull Up/Down: 1.5k to 3.0 VDC
Comparator (PULSE) Input: 100 mV, 500 mV, 1.0 VDC, 2.0 VDC
ANALOG (PROCESS) INPUT SIGNALS
Type
Range
Resolution
Min
Max
Accuracy
Input Impedance
Current Loop
0-20 mA
± 0.1 mA
0 mA
24 mA
± 0.2 mA
50 ohm
Voltage
0 – 1.0 VDC
± 10 mV
0 VDC
1.20 VDC
± 10 mV
100k ohm
Voltage
0 – 2.0 VDC
± 10 mV
0 VDC
2.50 VDC
± 20 mV
100k ohm
DIO DIGITAL INPUTS
VinHighThreshold = 2.2 VMAX
VinLowThreshold = 0.3 VMIN
VinMAX = 30 VDC
DIO DIGITAL OUTPUTS
2x Open Drain 100 mA max
VMAX = 30 VDC
ENVIRONMENTAL
Operating Temperature: -40 to 85°C (-40 to 185°F)
Rating: IP67 when mated
MECHANICAL
Dimensions: 22.1 mm W x 96.7 mm L (0.87” x 3.80”) not including mounting tabs
GENERAL
Agency Approvals: CE, UKCA
Compatibility: Compatible with OEG, SYNC configuration software, Layer N Cloud, and Modbus Networks
Type
Range
Operating Conditions
Accuracy
Frequency (Rate)
0.01 Hz to 100 Hz
TPW MIN = 200 uS
± 0.5%
Frequency (Rate)
100 Hz to 1000 Hz
TPW MIN = 200 uS
± 1 Hz Averaged over 1s
Up Counter
0 to +8388608
1 kHz Max Rate
± 1 Count Max
Up/Down Counter
-8388608 to +8388608
1 kHz Max Rate
± 1 Count Max
Pulse Width (TPW)
200 uS min
± 50 uS ± 1%
Pulse Delay (TPP)
200 uS min
± 50 uS ± 1%
Duty Cycle
1% to 99%
0.01 Hz to 1000 Hz, TPW MIN = 200 uS
±1.5% Max

8 | M5751
4 Hardware Setup
4.1 Connecting to your Layer N Smart Interface
The SP-013 requires a Layer N Smart Interface to connect to a computer. Use the M12 8-Pin Connector diagram
below to connect the SP-013 to a Layer N Smart Interface.
4.2 Digital Input Wiring Diagram
The Layer N SP-013 accepts digital pulse inputs through its M12 5-Pin connector and a single process input in the
mixedinput mode. Users connecting wires directly to the SP-013 may refer to the wiring diagram provided below:
4.3 Discrete I/O
If the smart probe discrete I/O will be utilized, an M12.8-T-SPLIT and an M12.8-S-M-FM will need to be connected
between the Smart Interface and Smart Probe. Refer to the previous pin diagram and the wiring diagram below to
connect the accessories:
Figure 1: M12.8-T-SPLIT and M12.8-S-M-FM accessories for Discrete I/O access
Pin
Name
Function
Pin 1
DIO 0
Discrete I/O Signal 0
Pin 2
INTR
Interrupt Signal
Pin 3
SCL
I2C Clock Signal
Pin 4
SDA
I2C Data Signal
Pin 5
Shield
Shield Ground
Pin 6
DIO 1
Discrete I/O Signal 1
Pin 7
GND
Power Ground
Pin 8
3.3VDD
Power Supply
Pin
Digital Mode
Mixed Mode
Pin 1
Excitation Power
(3.3 VDC, 100 mA)
Excitation Power
(3.3 VDC, 100 mA)
Pin 2
DIN 0 / Pulse A
DIN 0 / Pulse A
Pin 3
Ground Reference
Ground Reference
Pin 4
DIN 2 / Enable /
Direction / Pulse B
Process 0
Pin 5
DIN 1 / Reset
DIN 1 / Reset
Figure 3: M12 8-Pin Male
Connector Front View
Figure 4: M12 5-Pin Female
Connector Front View

9 | M5751
5 SYNC Configuration
Layer N Smart Probe products are easily configured through Omega’s free SYNC configuration software. Ensure SYNC
is running on a Windows OS computer before continuing. Connect the SP-013 to the computer using your Layer N
Smart Interface to begin.
Note: SYNC is available to download for free on the OMEGA website.
5.1 Connecting to SYNC - Automatic Detect
Once the SP-013 and Layer N Smart Interface are connected to the computer, SYNC will automatically detect the
probe and begin displaying readings.
Note: If living readings from the SP-013 are displayed on SYNC, skip ahead to section 5.3 Input Configuration.
5.2 Connecting to SYNC – Manual
If SYNC does not automatically detect the device, follow these instructions to manually connect it.
Step 1: Click on the icon located on the top left of the SYNC interface.
Step 2: Proceed through the Add Device Wizard and click End Device / Probe.
5.2.1 Communication Interface
Set the communication parameters for the Layer N Smart Interface that you are connecting to.
Note: The connection type and parameters must be accurate for a proper connection to be
established. Failure to accurately setup communication parameters may result in
communication errors.
•Connection Type: Select the type of connection you have between your SP-013 and your computer.
•Command Timeout: The maximum time (in milliseconds) for a command to be completed before the command is
aborted.
Note: The default command timeout is 500 milliseconds. It is recommended that this section be left alone to avoid
communication errors.
Figure 2: USB Communication Interface
Figure 3: USB Serial Communication Interface

10 | M5751
•Device Address: If your Smart Interface is part of a network, enter the Network Address here. The default network
address is 1 for most devices. Please refer to the manual of your Smart Interface for more
information.
Note: The default Device Address is 1.
•Device IP or Port: The COM port number that your device is connected to on your computer.
Important: The following parameters should NOT be changed. These settings should NOT be changed unless the
configuration has been done on the interface.
•BaudRate: Controls bits per second
•DataBits: The number of ‘bits’ in each character sent.
•Parity: A means of checking the correctness of character by adding an extra ‘bit’ to the character and setting the
value based on all the other bits in the character.
•StopBits: The number of ‘bits’ used to indicate the end of the character.
Once you have completed setting the communication parameters for your device, click Finish.

11 | M5751
5.3 Input Configuration
In Digital Inputs mode, the SP-013 accepts digital pulse inputs and may be configured to monitor the on/off state of
the input signals, the pulse rate or pulse duty cycle of the primary input, the up/down count of the primary input, or
the pulse delay between two signals. In Mixed Input mode, the SP-013 can accept one process input and one digital
pulse input. In all modes, the general Discrete I/O may be configured. These modes are detailed in the sections
below.
5.3.1 Digital Inputs Interface
To configure the Digital Inputs, follow the steps below:
Step 1: Click the Inputs configuration tab on SYNC and choose Digital or Digital, DIO from the Type dropdown.
Step 2: Select the type of digital input in the Device Range/Type dropdown in SYNC. The following types are
available:
Selection
Measurement
Description
DIN
Digital Input
3-bit Binary Digital Input
RATE
Frequency
Measure the frequency of rising edges
WIDTH
Pulse Width
Measure the active time of a signal
DUTY
Duty Cycle
Measure the % of active time of a signal
DELAY Phase Delay Timer
Measure the time between the rising edges of Pulse A
and Pulse B
COUNT
Up Counter / Totalizer
Counter with Enable and Reset
UP/DOWN COUNT
Up/Down Counter/Totalizer
Counter with Direction and Reset
Figure 7: SYNC interface digital input without DIO configuration

12 | M5751
Digital Input Binary
DIN_0
Inactive
Active
Inactive
Active
Inactive
Active
Inactive
Active
DIN_1
Inactive
Inactive
Active
Active
Inactive
Inactive
Active
Active
DIN_2
Inactive
Inactive
Inactive
Inactive
Active
Active
Active
Active
Digital_Input
Display (Binary) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
5.3.1.1 Pulse Measurements
Pulse measurements include Digital Input (DIN), Frequency (RATE), Pulse Width (WIDTH), Duty Cycle (DUTY),
Phase Delay Between Pulse Inputs (DELAY), Up Counter/Totalizer (COUNT), and Up/Down Counter/Totalizer
(UP/DOWN COUNT). All measurements are derived from signal transitions and an internal 32.768 kHz time
reference. The pulse input signal is read on the Pulse A input (pin 2) and the reset input signal is read on the
Reset input (pin 5). The third input on pin 4 changes its functionality depending on the pulse measurement
type and can be Enable, Direction, or Pulse. When the reset input is activated then the pulse input value is
zeroed for all pulse measurement types. When the third input pin is configured as an enable input and is
deactivated then the pulse input value is zeroed. Unless otherwise stated, the third input pin defaults to
Enable functionality which must be set HIGH to allow measurement.
The Digital Input (DIN) mode reports the binary value on the DIN pulse input pins. Note the DIN inputs
replace the functionality of the Pulse, Reset, and Enable inputs.
Two measurement modes are used when measuring Frequency (RATE). If the measured frequency is
greater than 100 Hz the total number of pulses/second is used to determine the frequency. If the measured
frequency is less than 100 Hz the time between rising edges is used to calculate the frequency.
The Pulse Width (WIDTH) setting measures the active portion of a periodic signal in msec. The pulse input
may be configured to be active high or active low to measure the positive or negative portion of the pulse
width. See the Input Configuration Diagrams section for details.
Frequency (RATE) = Total
Count/second if > 100 counts/second
Frequency (RATE) = 1/pulse period if
frequency < 100 counts/second
Pulse Width
Figure 9: Frequency (rate) example
Figure 10: Positive pulse width example
Figure 8: Digital Input example
Digital Value 1
Digital Value 0

13 | M5751
The Duty Cycle (DUTY) setting measures the percentage of time a pulse is active (high) over the total period
of the signal. The duty cycle measurement allows reading the input from PWM control signals.
The Phase Delay (DELAY) mode measures the delay time in msec between the rising edges of Pulse A and
Pulse B inputs. Note the Pulse B input replaces the functionality of the Enable input. This function is
intended to be used on two input pulses operating at the same frequency but with different phase offsets.
The Up Counter/Totalizer (COUNT) mode counts the number of rising edges while the Enable input is active
until the Reset input is activated. The Enable Input (Pin 4) acts as a Stop/Start for the Up Counter when
pulled up to 3.3 V. If the Enable Input is Inactive, it will pause/stop the up counter until it is re-enabled. If
the Enable Input is Active, it will start the up-count. Activating the Reset input (Pin 5) will reset the counter
back to 0. The Reset and Enable inputs can be configured to be active high or active low by configuring the
Enable Input to Pull-Down (PD). See the Input Configuration Diagrams section for details.
Duty Cycle = X / Y %
X
Y
Figure 11: Duty cycle example
PULSE
RESET
Counts the number of pulses
while Reset is inactive and
Enable is active
Figure 13: Up Counter/Totalizer example with Active High Reset and Enable
Counter resets to 0 when
reset is active
PULSE_B
Measure the time between rising
edges of PULSE_A and PULSE_B
Figure 12: Phase Delay example
ENABLE
Pauses the number of pulses
while Reset is inactive and
Enable is inctive
PULSE_A

14 | M5751
The Up/Down Counter/Totalizer (UP/DOWN COUNT) mode counts the number of rising edges until the
Reset input is activated. Additionally, the direction of the counter may be controlled using the Direction
input (Pin 4) so that it counts up when Active and down when Inactive. Note the Direction input replaces the
functionality of the Enable input. The Reset and Direction input can be configured to be active high or active
low. See the Input Configuration Diagrams section for details.
PULSE
RESET
Counts up the number of
pulses while reset is inactive
and direction is active
Figure 14: Up/Down Counter/Totalizer example with Active High Reset and Direction
Counter resets to 0 when
reset is active
DIR
Counts down the number of
pulses while reset is inactive
and direction is inactive

15 | M5751
5.3.1.1.1 Input Configuration Diagrams
The digital pulse input pins can be independently set to either have an internal 1.5k Pull Up (PU)
or Pull Down (PD) and can be set to be either Active High or Active Low by selecting Normally
Open (NO) or Normally Closed (NC) in the SYNC input configuration interface. Some typical
circuits are shown below:
Figure 15: Active High/Low Circuit Examples

16 | M5751
The DIN 0 / Pulse A input pin may also be configured for low-level mV input signals. The four selectable ranges
determine the turn-on threshold (TH) and the turn-off threshold (TL) which are used to set the ACTIVE level of
the digital input.
5.3.2 Mixed Input Interface
When set to the mixed input mode, the SP-013 can accept one process signal and one digital pulse input. To
configure the digital pulse and process inputs, follow these steps:
Figure 17: SYNC interface digital and process configuration with general DIO
Step 1: Click the Inputs configuration tab on SYNC and choose the Digital, Process or Digital, Process,
DIO type from the Type drop-down.
Step 2: For each respective channel, select the type of digital or process input in the Device
Range/Type drop-down. Click Apply Settings when done.
For additional information regarding pin wiring for the single digital and single process mixed mode, refer to
the wiring diagrams on page 8.
Setting
High Threshold
(ON)
Low Threshold
(OFF)
100 mV
75 mV
37.5 mV
500 mV
375 mV
187.5 mV
1.0 V
0.75 VDC
0.375 VDC
2.0 V
1.5 VDC
0.75 VDC
Figure 16: Active High/Low Threshold example

17 | M5751
5.3.2.1 Digital Inputs (Mixed Mode)
The following table lists the available digital input configuration options available when in mixed mode.
Some options available in digital-only mode are not available in mixed mode. Descriptions and example
diagrams are provided starting in section 5.3.1.1 Pulse Measurements.
Selection
Measurement
Description
DIN
Digital Input
2-bit binary digital input
RATE
Frequency
Measures the frequency of rising edges
WIDTH
Pulse Width
Measures the active time of a signal
DUTY
Duty Cycle
Measures the % of active time of a signal
COUNT
Up Counter / Totalizer
Counter with Enable and Reset
Important: Digital input signals (pulse inputs) must be referenced to ground when Mixed Mode is used.
Negative offsets at pulse inputs may cause interference and noisy/incorrect readings in
analog (mA/V) process input signals.
The table below shows the binary-weighted values for the 2-bit Digital Input (DIN) function in mixed
mode.
Input 1
Input 0
Reading
Inactive
Inactive
0
Inactive
Active
1
Active
Inactive
2
Active
Active
3
5.3.2.2 Process Inputs (Mixed Mode)
The following process input configuration options are available in mixed input mode: 4-20 mA current loop,
0-1.0 V voltage input, 0-2.0 V voltage input. Current loop readings are rounded to the nearest 0.1 mA and
voltage readings are rounded to the nearest 10 mV.
5.3.2.2.1 4-20 mA Device Connection
The Current Loop interface measures the current into the selected input by converting it to a
voltage measurement across a fixed 49.9-ohm resistor.
Figure 18: 4-20 mA device connection diagram

18 | M5751
5.3.3 Discrete Input/Output (DIO)
The Layer N SP-013 features 2 configurable discrete I/O pins. These can be used for a myriad of applications
including driving relays, physical alarms, or sensing dry contacts like door switches. The user may configure
the polarity of the inputs (active HIGH or active LOW) or Disable the DIO to utilize the outputs (ON/OFF,
PWM, SERVO).
The Discrete I/O input shares the output circuitry. The internal process drives the output control signal to
turn on the output driver which will force the output low. When the state of the DIO input signal is to be
read the processor applies 3.3 VDC to the Input Bias signal and reads the level detected at the Input Sense. If
the output is inactive an external signal may be used to force the input level low. A diode protects external
positive voltages, allowing the output driver to activate loads greater than the internal 3.3 VDC.
Figure 19: SYNC interface discrete I/O input configuration
Figure 20: Digital/Discrete I/O circuitry

19 | M5751
5.3.3.1 Setting DIO as an Input
To use a DIO pin as an input, make sure it is set to Active Low (default) in the Output Tab in SYNC.
Then, in the Input Tab, select a Type from the drop-down which includes DIO. Each DIO pin has an internal
pull-up, but to save power, the internal pull-up is only active when the unit takes a reading.
5.3.4 Advanced Scaling Options
The Layer N SP-013 allows for advanced scaling options on process and pulse inputs only. The Advanced
Scaling checkbox can be selected to expand additional configuration options. A gain and/or offset can be
applied to the input reading and the displayed unit can be changed.
To apply a gain or offset to the input, expand the Scaling menu and ensure that Apply Scaling is checked.
There, the gain and offset values can be adjusted. Both positive and negative values may be entered as well
as decimal numbers. The equation for the scaled input value is given below.
 =( ×)+
The displayed units can be changed by entering a new value in the Unit field and clicking Apply Settings.
This field is limited to a maximum of 4 characters. Note that changing the Unit field does not change the
base unit type, only the display name. The Lock checkbox must be selected to use the user-defined Unit
field. Unchecking the Lock checkbox and clicking Apply Settings will revert the unit display back to the
default setting.
Figure 21: SYNC interface outputs tab
Figure 22: SYNC interface Digital_IO

20 | M5751
The screenshot above shows an example application for advanced scaling with changed units. A fan tachometer
with a 500 Hz signal is connected to the Pulse Rate input. The fan outputs 2 pulses per revolution, so to convert
to rotations per minute (RPM) the reading must be divided by 2 which is accomplished by setting the Gain to
0.5. The units can then be renamed to RPM and will display as such.
Figure 23: Advanced Scaling Example