Acromag TT339-0700 User manual

USB Programmable, DIN Rail Mount
Thin Transmitter
Model TT339-0700
Isolated 4-Wire Transmitter, Frequency/PWM/Pulse Input
Universal Current & Voltage Output
USER’S MANUAL
ACROMAG INCORPORATED
30765 South Wixom Road
Wixom, MI 48393-2417 U.S.A.
Copyright 2014, Acromag, Inc., Printed in the USA.
Data and specifications are subject to change without notice.
Tel: [phone]
Fax: [phone]
email: [e-mail]
8500-948M

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[2 ]
http://www.acromag.com
Table of Contents
GETTING STARTEDDESCRIPTION ...............................................................4
Key Features........................................................................................................................4
Application ..........................................................................................................................4
Mechanical Dimensions .......................................................................................................5
DIN Rail Mounting & Removal..............................................................................................5
ELECTRICAL CONNECTIONS .......................................................................6
Sensor Input Connections ....................................................................................................7
Output Connections.............................................................................................................9
Power Connections............................................................................................................10
Optional Bus & Redundant Power Connections ..................................................................11
Earth Ground Connections .................................................................................................12
USB Connections................................................................................................................13
CONFIGURATION SOFTWARE..................................................................14
Quick Overview – Android .................................................................................................14
Quick Overview – Windows ...............................................................................................15
OPERATION STEP-BY-STEP ......................................................................17
Connections.......................................................................................................................17
Configuration.....................................................................................................................19
Calibration (Optional) ........................................................................................................23
BLOCK DIAGRAM....................................................................................24
How It Works.....................................................................................................................24
Flow Chart .........................................................................................................................25
Measurement Techniques..................................................................................................26
TROUBLESHOOTING ...............................................................................26
Diagnostics Table...............................................................................................................26
Service & Repair Assistance ...............................................................................................27

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[3 ]
http://www.acromag.com
ACCESSORIES..........................................................................................28
Software Interface Package................................................................................................28
USB Isolator.......................................................................................................................28
USB A-B Cable....................................................................................................................28
USB A-mini B Cable ............................................................................................................28
USB OTG Cable ..................................................................................................................29
DIN Rail Bus Connector Kit .................................................................................................29
SPECIFICATIONS .....................................................................................30
Model Number ..................................................................................................................30
Input .................................................................................................................................30
Output...............................................................................................................................32
USB Interface.....................................................................................................................34
Enclosure & Physical ..........................................................................................................35
Environmental ...................................................................................................................35
Agency Approvals ..............................................................................................................37
Reliability Prediction..........................................................................................................37
Configuration Controls.......................................................................................................37
REVISION HISTORY .................................................................................38
All trademarks are the property of their respective owners.
IMPORTANT SAFETY CONSIDERATIONS
You must consider the possible negative effects of power, wiring, component, sensor, or software failure in the design of
any type of control or monitoring system. This is very important where property loss or human life is involved. It is
important that you perform satisfactory overall system design and it is agreed between you and Acromag, that this is your
responsibility.
The information of this manual may change without notice. Acromag makes no warranty of any kind with regard to
this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular
purpose. Further, Acromag assumes no responsibility for any errors that may appear in this manual and makes no
commitment to update, or keep current, the information contained in this manual. No part of this manual may be
copied or reproduced in any form without the prior written consent of Acromag, Inc.

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[4 ]
http://www.acromag.com
GETTING STARTED
DESCRIPTION
Symbols on equipment:
Means “Refer to User’s Manual
(this manual) for additional
information”.
The TT339 is an ANSI/ISA Type 4 transmitter designed to interface with frequency-
time domain sensors and transducers, measure the input signal frequency, and
modulate a DC current or DC voltage signal at its output. The transmitter will
condition periodic or pulse waveform signals and provide an isolated process
current or voltage output. Configuration is performed using software and a USB
connection to Windows-based PC’s (Windows XP and later versions only).
Key Features
•Easy setup and digital calibration via USB with Windows configuration
software
•Measures frequency or duty cycle and interfaces many input types up to
100KHz
•Accepts input amplitudes up to 120VRMS (±170V DC, unipolar or bipolar)
•Adjustable 0Hz cut-off, sample averaging, debounce, and output update time
•Universal output connections support ranges up to ±21mA or ±10.5V DC
without rewiring
•Supports normal or reverse-acting output
•Fast response time and high accuracy
•Space-saving 17.5mm (0.7 inch) unit with pluggable terminals for convenient
wiring
•Redundant power ready (rail/local)
•1500V isolation, 3-way (power, input, output)
•Shock (25g) and vibration (4g) resistant
•Mounts on Type T DIN-rail
•Wide ambient operation (-40 to 80°C)
•CE compliant
•UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals
•Thoroughly tested and hardened for harsh environments
II 3 G Ex nA IIC T4 Gc -40°C < Ta < +80°C.
Application
The TT339 transmitter is designed for high-density mounting on 35mm T-type DIN
rails. Modules may be mounted side-by-side on 0.69-inch (17.5mm) centers. 12–32V
DC power is supported via terminals on the module, or optionally via power wired
to its DIN-rail bus connector.
This model accepts frequency or pulse inputs and isolates the input signal allowing
it to mate with grounded or non-grounded sensors.
The universal output signal is isolated from the input and power and will drive
current or voltage signals for the ranges ±20mA, 0–20mA, 4–20mA, ±10V, 0–10V,
±5V, and 0–5V. The output of this transmitter is unique in that it can drive either
current or voltage under digital control using the same terminals.
!

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[5 ]
http://www.acromag.com
Mechanical Dimensions
Modules may be mounted to 35mm
“T” type DIN rail (35mm, type
EN50022), and side-by-side on
17.5mm (0.7-inch) centers.
CAUTION:
IEC Safety Standards may require
that this device be mounted within
an approved metal enclosure or sub-
system, particularly for applications
with exposure to voltages greater
than or equal to 75VDC or 50VAC.
DIN Rail Mounting & Removal
Refer to the following figure for mounting and removing a module from the DIN rail.
Mounting
A spring loaded DIN clip is located on the input side bottom. The rounded edge of
the output side bottom allows the module to tilt upward so that it may be lifted
from the rail when prying the spring clip back with a screwdriver. To attach a
module to T-type DIN rail, angle the top of the module towards the rail and place
the top groove of the module over the upper lip of the DIN rail. Firmly push the
module downward towards the rail until it snaps into place.
Removal
To remove a module from the DIN rail, first separate the input terminal blocks from
the bottom side of the module to create a clearance to the DIN mounting area. A
screwdriver can be used to pry the pluggable terminals out of their sockets. While
holding the module in place from above, insert a screwdriver into the lower path of
the bottom of the module to the DIN rail clip and use it as a lever to force the DIN
rail spring clip down while pulling the bottom of the module outward until it
disengages from the rail. Tilt the module upward to lift it from the rail.

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[6 ]
http://www.acromag.com
ELECTRICAL CONNECTIONS
WARNING – EXPLOSION HAZARD – Do not disconnect equipment unless power has
been removed or the area is known to be non-hazardous.
WARNING – EXPLOSION HAZARD – Substitution of any components may impair
suitability for Class I, Division 2.
WARNING – EXPLOSION HAZARD – The area must be known to be non-hazardous
before servicing/replacing the unit and before installing.
Wire terminals can accommodate 14–26 AWG (2.08–0.13mm2) solid or stranded
wire with a minimum temperature rating of 85oC. Input wiring may be shielded or
unshielded type. Ideally, output wires should be twisted pair. Terminals are
pluggable and can be removed from their sockets by prying outward from the top
with a flat-head screwdriver blade.
Strip back wire insulation 0.25-inch on each lead and insert the wire ends into the
cage clamp connector of the terminal block. Use a screwdriver to tighten the screw
by turning it in a clockwise direction to secure the wire (0.5-0.6Nm torque). Since
common mode voltages can exist on signal wiring, adequate wire insulation should
be used, and proper wiring practices followed. As a rule, output wires are normally
separated from input wiring for safety, as well as for low noise pickup.
T-Rail
35mm DIN Rail
SCREWDRIVER SLOT
FOR REMOVAL FROM
"T" TYPE DIN RAIL
TILT MODULE UPWARD TOWARDS RAIL
AND HOOK ONTO UPPER LIP OF RAIL.
ROTATE MODULE DOWNWARD TO
ENGAGE SPRING CLIP ONTO LOWER
LIP OF RAIL.
TOP
BOTTOM
(INPUT SIDE)
(OUTPUT SIDE)
TT3XX MODULE DIN RAIL MOUNTING AND REMOVAL
SPRING CLIP
USE SCREWDRIVER TO REMOVE
MODULE FROM RAIL AS SHOWN
TT3XX MODULE
TT300
Series
USB
!

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[7 ]
http://www.acromag.com
Sensor Input Connections
NOTE:
Since common mode voltages
can exist on signal wiring,
adequate wire insulation should
be used and proper wiring
practices followed. As a rule,
output wires are normally
separated from input wiring and
from power wiring for safety, as
well as for low noise pickup.
TIP:
Input, power, and output
terminal blocks are a plug-in
type and can be easily removed
to facilitate module removal or
replacement without removing
individual wires.
Sensor wires are connected directly to the module input terminals at the bottom of
the module (the spring-loaded DIN clip side). Transmitter input signals are isolated
from output and power. Observe proper polarity when making input connections.
Refer to the example input connections on the following page.
•Transmitter input signal is isolated from output.
•Inputs are polarized. Observe proper polarity.
•Input excitation drives +5VDC up to 20mA.

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[8 ]
http://www.acromag.com
NOTE:
This ground connection is recommended for best results. If
sensors are inherently connected to ground, use caution
and avoid making additional ground connections which
could generate ground loops and measurement error.
REFERENCE:
Input excitation (+EXC) is +5VDC
Bipolar mode for zero-crossing signals
Unipolar mode for non-zero crossing signals
Internal pull-up/pull-down resistors are
2.7KΩ/1KΩ and connect to +5V/–FRTN

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[9 ]
http://www.acromag.com
Output Connections
(DC Current or Voltage)
NOTE:
This transmitter is an ANSI/ISA
Type 4 in which the transmitter’s
power is isolated from the input
and output circuits.
Output connections are polarized. Current is output from Output+ and returns
to Output–. Voltage output is positive at Output+.
Variations in load resistance have negligible effect on output accuracy, as long
as load limits are respected with respect to output type.
Note the placement of earth ground. The output cable shield and return should
ideally be grounded closest to the transmitter. Only one end of the connection
should be grounded, never both.
Observe proper polarity. Note that twisted-pair wiring is often used to connect the
longest distance between the field transmitter output and the remote load as shown
above. Additionally, shielded twisted pair wiring is recommended for best results. An
output connection to earth ground will help protect the circuit from damage in noisy
environments.
WARNING: For compliance to applicable safety and performance standards, the
use of twisted pair output wiring is recommended. Failure to adhere to proper
wiring and grounding practices as instructed may compromise safety,
performance, and possibly damage the transmitter.
TIP – Ripple & Noise: Additional filtering placed at the load can help reduce
60Hz/120Hz ripple often present in industrial applications. For large 60Hz supply
ripple, connect an external 1uF or larger capacitor directly across the load to reduce
excessive ripple. For sensitive applications with high-speed acquisition at the load,
high frequency noise may be reduced significantly by placing a 0.1uF capacitor
directly across the load, as close to the load as possible.

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[10 ]
http://www.acromag.com
Power Connections
This transmitter is powered from 12–32VDC (36VDC peak) by connecting power as
shown below. This transmitter can be optionally powered (or redundantly powered)
via the DIN rail bus when coupled to the DIN rail bus connector (Acromag Model
1005-063) and a bus terminal block (Acromag 1005-220 or 1005-221). This optional
method can allow several modules to share a single power supply without wiring to
each individually.
Power connections are isolated from input and output. The supply voltage
should be from 12–32VDC. This voltage must never exceed 36VDC peak, or
damage to the transmitter may result.
Variations in power supply voltage between the minimum required and 32VDC
maximum, has negligible effect on transmitter accuracy.
Note the placement of earth ground at input power. The power cable shield
and DC– should ideally be grounded closest to the transmitter. Only one end of
the connection should be grounded, never both.
CAUTION – Risk of Electric Shock: More than one disconnect switch may be
required to de-energize this equipment before servicing.
IMPORTANT – External Fuse: If the transmitter is powered from a supply capable of
delivering more than 2.5A to the transmitter, it is recommended that this current be
limited via a high surge tolerant fuse rated for a maximum current of 2.5A or less
(for example, see Bel Fuse MJS or RJS fuse types).

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[11 ]
http://www.acromag.com
Optional Bus & Redundant Power Connections
Power is normally connected to the TB4 power terminals of the transmitter as
shown on the previous page. However, this transmitter is equipped to be optionally
powered via its DIN rail bus connector provided (Acromag 1005-063), when mated
to an optional plug-in terminal block (Acromag 1005-220 or 1005-221). Power input
via the bus connector terminal is diode-coupled to the same point as transmitter
power connected at TB4 power.
Multiple modules may be powered by snapping them together along the DIN rail
bus, then using the mating terminal block shown at left (select a Left or Right side
connector). While the intent of the bus power connector is to allow several modules
to conveniently share a single supply, the bus power connector may also be used to
redundantly power modules, allowing a backup supply to maintain power to the
module(s) should the main supply at TB4 fail.
This transmitter comes equipped with the bus connector 1005-063 shown below.
This connector allows modules to snap together, side-by-side, along the DIN rail and
share these connections. To complete connection to power, an optional bus
terminal block is needed (Acromag 1005-220 for left-side, or 1005-221 for right-side
connections). Refer to the figure on the following page which shows how to wire
power to the optional bus connector using these connectors.
Important – End Stops: If this module uses the optionally powered (or redundantly
powered) via the DIN rail bus for hazardous location installations (Class I, Division 2
or ATEX Zone 2) it must use two end stops (Acromag 1027-222) to secure the
terminal block and module (not shown).
35mm DIN Rail
TT300
Series
USB
TT300
Series
USB
TT300
Series
USB
TT300
Series
USB
TT300
Series
USB
TT300
Series
USB
DIN Rail Bus Connector
Acromag 1005-063
(Included with Module)
!

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[12 ]
http://www.acromag.com
Optional Bus & Redundant Power Connections…
The figure below shows how to wire power to the optional bus terminal block when
mated to the bus connector. Note that power is wired to the rightmost bus
terminals on the right, or the left-most terminals on the left. Observe proper
polarity.
Earth Ground Connections
The module housing is plastic and does not require an earth ground connection. It
does include a special connector that makes functional contact with the DIN rail if
the DIN rail is grounded, but do not rely on this connection for earth ground. The
internal input, output, and power circuits are electrically isolated from each other,
allowing these circuits to be individually earth grounded as indicated. If the module
is mounted in a metal housing, a ground wire connection is typically required for the
enclosure and the metal enclosure’s ground terminal (green screw) should be
connected to earth ground using suitable wire per applicable codes.
See the Electrical Connections Drawings for Input, Output, and Power, and note the
position of earth ground. Earth ground should be applied at the input power minus
terminal (DC–). The input and output circuits are shunted to earth ground applied at
the power minus terminal via internal isolation capacitors.
Avoid inadvertent connections to earth ground at other points than those
indicated, as this could drive ground loops and negatively affect operation.
A USB isolator is recommended when configuring or calibrating a transmitter to
avoid the ground loop that occurs if the input sensor is also earth grounded (PC
USB ports are commonly earth grounded and make contact with both the USB
signal and shield ground which is held in common to the input circuit ground of
the transmitter).
35mm DIN RAIL
TT300
Series
USB
DC
DC
DIN RAIL BUS POWER
YOU CAN OPTIONALLY CONNECT POWER
TO THE DIN RAIL BUS CONNECTOR ALONG
THE DIN RAIL USING THE OPTIONAL
TERMINALS AS SHOWN.
LEFT RIGHT
++
+
–
–
––
+
DC
DC
–
+
FUSE
+
–
DC SUPPLY
(12–32V)
*
MALE TERMINAL BLOCK
ACROMAG 1005-221
(RIGHT-SIDE CONNECTION)
CAUTION: DO NOT EXCEED 36VDC, OR
DAMAGE TO THE UNIT MAY RESULT.
IT IS RECOMMENDED THAT
SUPPLIES CAPABLE OF SOURCING
MORE THAN 2.5A TO THE UNIT BE FUSED
WITH A HIGH SURGE TOLERANT FUSE.
*
NOTE:
EARTH
GROUND
FEMALE TERMINAL BLOCK
ACROMAG 1005-220
(LEFT-SIDE CONNECTION)

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[13 ]
http://www.acromag.com
USB Connections
This transmitter is configured and calibrated via configuration software that runs on
Windows-based PCs connected to the transmitter via USB (Windows XP or later
version required). Refer to the following drawing to connect a PC to the transmitter
for the purpose of configuration
WARNING:
The intent of mating USB with this
transmitter is so that it can be
conveniently configured and
calibrated in a safe area, then
installed in the field which may be
in a hazardous area. Do not
attempt to connect a PC or laptop
to this transmitter while installed
in a hazardous area, as USB energy
levels could ignite explosive gases
or particles in the air.
USB Signal Isolation is recommended and required when connected to a grounded
input. Input and USB connections are isolated from the output of this transmitter.
USB isolation is recommended for safety and noise suppression reasons, but
required when the input signal is grounded (i.e. when non-insulated or grounded
sensors are used). Acromag model USB-ISOLATOR may be used to isolate the USB
port, or optionally a different USB signal isolator that supports USB Full Speed
operation (12Mbps).
IMPORTANT: USB logic signals to the transmitter are referenced to the potential of
the transmitter’s input ground. This ground is held in common with USB ground and
USB cable shield ground. Thus, an isolator is required when the input signal is
grounded and the transmitter is connected to the USB port of an earth-grounded
PC. The use of an isolator can be avoided if a battery powered laptop PC is used to
connect to the transmitter, and the laptop has no other earth ground connection,
either directly or via a connected peripheral.
PERSONAL COMPUTER
RUNNING WINDOWS OS
1 METER USB CABLE
USB-A MALE
TO HOST USB PORT
HOST
USB
HOST USB SERIAL
PORT CONNECTOR
AT BACK OF PC
CONFIGURATION
SOFTWARE
ACROMAG
HOST PC RUNNING
USB-B MALE
DEVICE
CONNECT
PC
CONNECT
POWER RESET
CONNECTION
USB-A MALE
TT SERIES USB TRANSMITTER CONNECTIONS
(RECOMMENDED)
USED FOR CONFIGURATION AND CALIBRATION OF THE TRANSMITTER IN A SAFE OR ORDINARY LOCATION
CABLE Model 4001-113
MODEL NO. - USB-ISOLATOR
Model 4001-112
Refer to Configuration Software Kit, Model TTC-SIP, which includes:
1 ea, Model 4001-113 USB Cable
1 ea, Model 4001-112 USB Cable
1 ea, Model USB-ISOLATOR
1 ea, Configuration Software CDROM 5040-944
USB MiniB MALE
USB MiniB Socket
(Front-Panel of Module)
MODEL TT3XX TRANSMITTER
12 –32V
DC POWER
SUPPLY
+
–
–TB4-11
+ TB4-12
TB3
(OUTPUT)
TB4
(POWER)
TB1
(INPUT)
TB2
(INPUT)
!

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[14 ]
http://www.acromag.com
CONFIGURATION SOFTWARE
Quick Overview – Android
This transmitter can be configured and calibrated via the Acromag Agility™
Config Tool App. This software can be downloaded free of charge from the
Google Play store at play.google.com. To connect to this transmitter, a USB
OTG (On-The-Go) cable (Acromag 5028-565) and USB A to Mini-B cable
(Acromag 4001-113) are required. This app is compatible with Android devices
using Ice Cream Sandwich (4.0) or later.
The initial connection screen of the app is shown at left. Once a device is
connected, the main portion of the app will launch. The screen is divided into
three tabs for this model. A short description of each tab follows.
Connection Screen Setup – DEVICE SELECT (First Connect to Unit Here)
•Select from connected transmitters by tapping the [Select Device] button.
This will bring up a list of attached devices. Select the desired device and
tap the Connect button to open the device.
•To view wiring diagrams of a particular transmitter, tap the [Wiring
Diagram] button and select the desired model. Swipe left or right to view
more diagrams. No connection is required to view the diagrams.
•Android requires user permission to access external hardware. If the
Device List displays “No Device Permission”, select this device and when
prompted to give permission to access the USB device, tap [OK].
Configuration Tab – CONFIGURE I/O
•Once connected, the app will automatically read your transmitter and
display its current configuration.
•Changing any option on this page will send the changes to the transmitter
instantly. The device status at the bottom of the page will report if the
changes were sent successfully.
Calibration Tab – (Calibrate the Input and/or Output if Needed)
•On screen instruction will guide the setup to properly calibrate the
transmitter. After completing instructions, tap the [Calibrate] button.
•The device status at the bottom of the page will report if the calibration
was sent successfully.
Diagnostic Center Tab – (Verify Input operation)
•Select the polling indicator by tapping the [Indicator] button.
•Start polling by tapping the [Start Polling] button.
Utility Page – (Reboot or Restore Settings)
•Tap the [Gear] in the Action bar to access the Utility Page.
•You can tap the [Restore/Reset Factory] utility buttons to get out of
trouble if you ever misconfigure or miscalibrate a transmitter.

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[15 ]
http://www.acromag.com
Quick Overview – Windows
Click “Open” to connect to the TT339-0700
and the software will look similar to the
following:
This transmitter can be configured and calibrated via its configuration
software and a USB connection to a PC or laptop. The configuration
software can be downloaded free of charge from our web site at
www.acromag.com. This software is also included on a CD-ROM bundled
with the Configuration Kit TT-SIP (see Accessories). For this transmitter,
use program “TT339 Config.exe”. The software is compatible with XP or
later versions of the Windows operating system. The initial configuration
software window for this model is shown at left.
Communication Setup (First Connect to Module Here)
Scan for connected transmitters and Open/Close communications
with them.
Display the Model, Serial Number, and Manufacturer of the
connected transmitter and report the status of communication.
I/O Config/Test (Configure and/or Test the Module Here)
Select the Threshold. Select Bipolar for zero crossing signals or
Unipolar for non-zero crossing signals.
Select the Measurement. Options are Frequency or Duty Cycle.
Select the Pull Up/Down depending on the input sensor type.
Enter the Cutoff Frequency. Inputs below the Cutoff Frequency are
measured as 0Hz.
Enter the Debounce time. The input must be steady for this length of
time before the transmitter will conduct a measurement.
Enter the number of Samples to Average. This controls the number of
samples included in the FIFO queue (first-in, first-out).
•Enter the Output Update. This controls the rate at which the output is
updated (sample window).
•Select the Output Range: ±5V, 0-5V, ±10V, 0-10V, ±20mA, 0-20mA, or
4-20mA.
Enter the I/O Scaling. Specify the input frequencies to correspond to
Zero-Scale and Full-Scale.
Submit the configuration settings to the transmitter by clicking the
[Send I/O Config] button to write the settings to the non-volatile
EEPROM memory.
I/O Test (Optional, Verify Transmitter Operation Here)
After making I/O configuration changes, you can use the I/O Test controls
to start/stop polling the input channel to check your input readings.
Click “Start Polling” to periodically read your input channel and validate its
operation. Click “Stop Polling” to stop polling the input channel. Note the
simulated red lamp next to the button flashes slowly when the software is
polling the input channel.
For detailed configuration and calibration procedures, see the Operation
Step-By-Step section of the Technical Reference of this manual.

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[16 ]
http://www.acromag.com
Quick Overview - Windows..
HELP:
You can press [F1] for Help on a selected
or highlighted field or control. You can
also click the [?] button in the upper-right
hand corner of the window and click to
point to a field or control to get a Help
message pertaining to the item you
pointed to.
Calibration (Calibrate the Output if Needed)
This transmitter has already been factory calibrated. If you encounter
excessive error, you can click the Calibration tab to display the Calibration
control page as shown at left.
For output zero-scale endpoint adjustment, click the [Zero-Scale] button
to open the zero-scale configuration popup. Use a current meter or digital
volt meter to accurately measure the transmitter output signal and enter
the measurement in the input field provided. Click the [Submit
Measurement]button to send the calibration to the transmitter.
For output full-scale endpoint adjustment, click the [Full-Scale] button to
open the full-scale configuration popup. Use a current meter or digital volt
meter to accurately measure the transmitter output signal and enter the
measurement in the input field provided. Click the [Submit Measurement]
button to send the calibration to the transmitter.
Factory Settings (Use only in case of trouble or for sanitation purposes)
•Restore a transmitter to its original factory calibration
•Restore a transmitter to its initial factory configuration
You can click the [Restore Factory] buttons if you ever misconfigure or
miscalibrate a transmitter in such a way that its operation appears erratic.
Calibration Status (Bottom of Window)
The Calibration Status bar at the bottom of the window will display status
messages relative to calibration.

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[17 ]
http://www.acromag.com
TECHNICAL REFERENCE
OPERATION STEP-BY-STEP
Connections
This section will walk you through
the Connection–Configuration–
Calibration process step-by-step.
Before attempting to reconfigure or
recalibrate this transmitter, verify
the following electrical
connections:
Calibration Connections:
NOTE: When calibrating, the output meter and load resistor (for current output)
must be accurate beyond the transmitter specifications, or better than ±0.1%. As a
general rule, calibration equipment accuracy should be four times better than the
rated accuracy you are trying to achieve with this transmitter.
Connect Output: Connect an output load to the transmitter appropriate for either
current or voltage, as required by your application. You will need to measure the
output current or voltage accurately in order to calibrate the output of the
transmitter. You could connect a current meter in series with the load to read the
output current directly, or a digital volt meter in parallel with the load to measure
output voltage. Alternatively, you could simply connect a voltmeter across a
precision load resistor, and then accurately read the output current as a function of
the IR voltage drop produced in the resistor (recommended for current outputs).
Calibration & Configuration Connections:
Connect Input (Optional):Connect a function generator or sensor at TB1 if you
want to verify the operation of the transmitter’s intended application. Refer to
Sensor Input Connections section for example input wiring and configurations.
Connect Power: Wire 12–32VDC power to the transmitter at TB4 as shown in the
Electrical Connections section. Optionally, you may wire power to the bus terminal
as shown in the optional power connections drawing. In either case, do not exceed
36VDC, or damage to the transmitter may result.
Apply power to the transmitter before connecting to USB. You will not be able to
configure or calibrate the transmitter without power applied, as this transmitter
does not use USB power.
Connect to PC via USB: Connect the transmitter to the PC using the USB isolator
and cables provided in Configuration Kit TTC-SIP (refer to Electrical Connections
section). You may omit the isolator if you are using a battery powered laptop PC to
connect to the transmitter, or if your input source is not already grounded.
Now that you have made your connections and applied power, you can execute
the “TT339 Config.exe” software to begin configuration of the transmitter
(software is compatible with XP or later versions of the Windows operating
system).
Connect Input
Connect Output
Connect Power
Connect
PC/USB
Configure I/O

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[18 ]
http://www.acromag.com
Connections...
NOTE: You should already have power connected to the
transmitter. You will not be able to configure, calibrate, or test
the transmitter without power applied.
After executing the Acromag Configuration software for this
transmitter, the window shown at left will appear, if you have
not already connected to the transmitter via USB (note fields
are blank under these conditions).
Connect your PC to the transmitter via USB, and the
transmitter’s model-serial information will appear in the device
field as shown in the second window at left.
If you happen to be connected to more than one transmitter via
a USB hub, you can use the device scroll field to select another
transmitter, using the serial information suffix of the model
number to discern one transmitter from another.
Select a transmitter from the drop down menu. When you click
on a transmitter name from the drop down menu, the software
will automatically attempt to open a connection with the
selected transmitter. If the software does not have an open
connection with the transmitter, click the [Open] button to
open a connection with the transmitter.
After opening a connection to a transmitter, the transmitter’s
Model, Serial Number, Manufacturer, and connection status will
be displayed as shown in the image on the left. In addition, the
Status field will indicate “Device opened successfully” as shown
in the image at left.

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[19 ]
http://www.acromag.com
Configuration
At this point, you can click the “I/O Config/Test” tab to begin
configuring the transmitter, or to optionally test its operation. The
I/O Config/Test window is the image shown at left.
When you click the “I/O Config/Test” tab, the software retrieves the
transmitter’s current configuration and displays it similar to the
image shown at left.
If you are connected to a transmitter, the initial I/O Config page
represents the current configuration of the connected transmitter
before making changes. Otherwise, if you have loaded the
configuration from a saved a file, or if you have made changes to any
fields, you can click the [Get I/O Config] button to retrieve the
transmitter’s current configuration.
NOTE: If you make any changes to the selections indicated, the only
way to preserve your changes is to write them to the transmitter by
clicking the [Send I/O Config] button after completing your
selections, or save them to a file by opening the “File” menu in the
upper left-hand corner of the window and selecting “Save As…”.
Select the Threshold...
The Threshold should be selected based on the type of input signal
the transmitter is measuring. Select Bipolar when the input signal is
zero crossing. Select Unipolar when the input signal is non-zero
crossing. There are two levels of hysteresis available for both Bipolar
and Unipolar options. The hysteresis is listed in parenthesis.
Select the Measurement...
Select Frequency to measure the frequency of the input signal. Select
Duty Cycle to measure the duty cycle of the input signal.
NOTE: The maximum input frequency when Measurement is set to
Duty Cycle is 20KHz.
Select the Pull Up/Down...
Select Pull-Up to pull the +FINP terminal to +5VDC through 2.7KΩ.
Select Pull-Down to pull the +FINP terminal to the –FRTN terminal
through 1KΩ. Select Disabled to disconnect the internal resistors.
Refer to the example input connections in the Sensor Input
Connections section for common sensor configurations.
WARNING: Do not exceed 15VDC with the internal pull-up or pull-
down resistors enabled, or damage to the circuit will result. Limit
internal pull-up/pull-down resistor power to less than 0.25W.
Disable the Pull-up/Pull-down if the input to the transmitter is AC
mains voltage (120VRMS).

Model TT339-0700
4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: [phone]
[20 ]
http://www.acromag.com
Configuration...
HELP:
Press [F1] for Help on a selected or highlighted field
or control. Alternatively, click the [?] button in the
upper-right hand corner of the window and click a
field or control to receive a Help message pertaining
to the item pointed to.
Select the Excitation...
Select either Enable to provide +5VDC to the +EXC terminal, or
Disable to turn off excitation supply. Excitation is internally limited
to 20mA, typical.
Enter the Cutoff Frequency...
The Cutoff Frequency controls the minimum frequency the
transmitter will measure. When the frequency of the input signal
falls below the Cutoff Frequency, the transmitter will measure
0Hz.
NOTE: Once the Cutoff Frequency is reached, the transmitter will
retain the last measurement and will wait a specified duration
before measuring 0Hz. This duration is equal to the period of the
Cutoff Frequency. If no input is captured within this duration, the
transmitter will measure 0Hz. For example, a 0.25Hz Cutoff
Frequency would configure the transmitter to wait 4 seconds
before measuring 0Hz.
Enter the number of Samples to Average...
This transmitter captures and saves samples in a FIFO (first-in,
first-out) queue. The number of samples in this queue is equal to
the number of Samples to Average. The FIFO queue is used to
calculate a running average. Samples are added to the FIFO queue
at the Output Update rate.
NOTE: It is often useful when measuring a gear using a magnetic
pickup to set the number of Samples to Average equal to the
number of teeth on the gear. Using this technique, variations in
gear teeth spacing will be averaged over one revolution, yielding a
constant frequency measurement.
Enter the Debounce...
The Debounce time controls the length of time the transmitter will
wait until the input signal is steady (not crossing threshold) before
measuring the input signal.
NOTE: Debounce is useful for filtering out temporary signal
glitches such as those generated by contact relays. For best
results, set the Debounce to twice the expected duration of
contact bounce.