Transducer Techniques SST Manual de usuario

OPERATOR MANUAL

PLUG AND PLAY IEEE 1451.4 COMPLIANT

SMART SENSOR TRANSMITTER

Techniques

Transducer

SST

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TABLE OF CONTENTS

1. TEDS IEEE 1451.4 INTRODUCTION .................................................................................. 3

2. SST TRANSMITTER INTRODUCTION................................................................................ 4

3. RECEIVING & UNPACKING YOUR TRANSMITTER ........................................................... 5

4. SAFETY CONSIDERATIONS .............................................................................................. 5

5. TRANSMITTER FIELD WIRING ......................................................................................... 6

6. READOUTS IN TEDS MODE .............................................................................................. 7

7. PROGRAMMING YOUR TRANSMITTER............................................................................ 8

- COMMUNICATIONS........................................................................................................ 9

- SIGNAL & CONTROL INPUTS......................................................................................... 11

- SCALING......................................................................................................................... 12

- FILTERING...................................................................................................................... 13

- RELAY ALARMS ............................................................................................................. 14

- ANALOG OUTPUT........................................................................................................... 15

- ADDITIONAL PROGRAMMABLE FEATURES................................................................... 15

8. OPENING YOUR TRANSMITTER CASE ............................................................................. 18

9. MAIN BOARD JUMPER SETTINGS ................................................................................... 19

10. LOAD CELL SIGNAL CONDITIONER BOARD JUMPER SETTINGS .................................... 20

11. TRANSMITTER CALIBRATION .......................................................................................... 20

12. DUAL RELAY OPERATION ............................................................................................... 21

13. MODBUS PROTOCOL TRANSMITTER COMMUNICATIONS.............................................. 24

14. CUSTOM ASCII PROTOCOL TRANSMITTER COMMUNICATIONS .................................... 29

15. SST TRANSMITTER SPECIFICATIONS.............................................................................. 34

16. ACCESSORIES .................................................................................................................. 36

17. WARRANTY ...................................................................................................................... 38

REVISED 11/2019

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1. TEDS IEEE 1451.4 INTRODUCTION

Model SST is a TEDS IEEE 1451.4 Plug and Play Smart Transmitter for TEDS IEEE 1451.4 com-

pliant Load Cell / Torque Sensors. Such sensors incorporate an EEPROM which specifies the type

of sensor, its interface, and technical information such as sensitivity, bridge type, excitation, etc.

TEDS, or Transducer Electronic Data Sheet, is a set of electronic data in a standardized format

defined by the IEEE 1451.4 Standard.

The SST transmitter automatically detects when a TEDS IEEE 1451.4 compliant Load Cell /Torque

Sensor has been connected to it by using a built-in EEPROM detector. It then reads the Sensor

EEPROM, stores the information in its memory, and performs an automatic configuration. The

EEPROM may be of any of the following types: DS1973/DS2433, DS2431 or DS1971/ DS2430A.

The automatic system configuration function performs all steps needed to calibrate the TEDS IEEE

1451.4 compliant Load Cell /Torque Sensor and SST Transmitter as a system. This includes the

configured precision of either 32 bits, 19 bits or 11 bits and the configured excitation voltage.

Interfacing the SST Transmitter to a TEDS IEEE 1451.4 compliant Load Cell /Torque Sensor is as

easy as plugging a mouse into a computer, making it a true plug-and-play experience.

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2. SST TRANSMITTER INTRODUCTION

The SST Transmitter is an extremely accurate and versatile DIN rail transmitter for Load Cell /

Torque Sensors. Standard features include:

Accuracy of 0.01% of full scale ± 1 count.

Update rate to 60/sec in 60 Hz noise environments or 50/sec in 50 Hz noise environments.

Full-scale range from 20.000 mV full scale (1 μV resolution) to 500.00 mV full scale

(10 µV resolution).

Isolated transducer excitation output. 5V at 100mA or 10V at 120mA as selected by TEDS. In

non-TEDS operation, the excitation is always 10V.

Isolated 4-20 mA, 0-20 mA, 0-10V or -10V to +10V analog output. The signal types are

selectable via jumpers. The output tracks the transmitter’s internal digital reading, is scaled in

software, and is generated by an ultra-linear 16-bit digital-to-analog converter.

Isolated serial data transmitter output. The transmitter serial port is default jumpered for

RS232 or full-duplex RS485 (same jumper settings). Half-duplex RS485 is also selectable

either via internal or external jumpers. Three serial protocols are software selectable: Modbus

RTU, Modbus ASCII and Custom ASCII. Modbus allows devices by different manufacturers to

be addressed on the same data line. The simpler Custom ASCII protocol is recommended

when there are no devices by other manufacturers on the data line.

Dual solid state relays rated 120 mA at 140 Vac or 180 Vdc.

Isolation to 250V rms is provided for power, signal input, analog output, relay outputs, and

communications. Isolation adds safety and avoids possible ground loops. The transducer

excitation output is isolated to 50V from signal ground.

Internal jumpers are used to select the signal range, communication type, and excitation level.

The transmitter configuration is specified by the model number on the transmitter label. A user

can reconfigure the transmitter by opening the case and moving jumpers.

Transmitter setup is via serial connection to a PC using MS Windows based Instrument Setup

Software plus TEDS IEEE 1451.4 when detected. The setup software can be downloaded at no

charge from http://www.transducertechniques.com/online-manuals.aspx. The required trans-

mitter to PC interface cable is available for purchase. With a TEDS IEEE 1451.4 compliant

Load/Torque Sensor, the transmitter and sensor are calibrated as a system.

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3. RECEIVING & UNPACKING YOUR TRANSMITTER

Your transmitter was carefully tested and inspected prior to shipment. Should the transmitter be

damaged in shipment, notify the freight carrier immediately. In the event the transmitter is not

configured as ordered or is inoperable, please contact Transducer Techniques.

4. SAFETY CONSIDERATIONS

Warning: Use of this transmitter in a manner other than specified may impair the protection

of the device and subject the user to a hazard. Do not attempt to operate if the unit shows visible

damage.

Cautions:

This unit may be powered from 95-240 Vac ±10% or with the worldwide voltage power supply

option, or from 12-30 Vac or 10-48 Vdc with the low voltage power supply option. Verify that

the proper power option is installed for the power to be used.

The 95-240 Vac ±10% power connector (P1 Pins 1-3) is colored Green to differentiate it from

other input and output connectors. The 12-30 Vac or 10-48 Vdc power connector is colored

Black. This transmitter has no power switch. It will be in operation as soon as power is

applied.

To avoid dangers of electrocution and/or short circuit, do not attempt to open the case while

the unit is under power.

To prevent an electrical or fire hazard, do not expose the transmitter to excessive moisture.

Do not operate the transmitter in the presence of flammable gases or fumes, as such an

environment constitutes an explosion hazard.

Symbols used:

Caution (refer to accompanying documents)

Earth (ground) terminal.

Caution, risk of electric shock.

Both direct and alternating current.

Equipment protected throughout by double

insulation or reinforced insulation.

Operating environment:

Transmitter Class II (double insulated) equipment designed for use in Pollution degree 2.

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5. TRANSMITTER FIELD WIRING

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P6 Wiring Detail

6. READOUTS IN TEDS MODE

When a SST Transmitter connected to a TEDS transducer is powered on, the transmitter reads

the data stored in the transducer. The excitation supply is automatically set to the correct

value, and the SST then calculates the correct scaling to calibrate the SST and transducer as a

system. The jumper on the signal conditioner board must be set for the 50 mV range. See

Section 10. If the Maximum Physical Value of the TEDS sensor exceeds 100,000, the

calculated scale and offset are divided by 10, and the reading is in 10's of units.

DPM-3-TRES Reader_Editor Software, which is available from Transducer Techniques as an

Accessory (see Section 17), allows the electronic data sheet for the transducer to be read

through the RS232 port of the transmitter and be displayed on a computer screen. The values

can be then be modified (e.g., to display kilograms instead of pounds) and be written back

into the transducer.

Instrument Setup (IS) Software can be used to further scale the reading or change decimal

points. For example, if the full scale of the transducer is 50 pounds, the transmitter can be

programmed to transmit 50, 50.0, 50.00, or 50.000 at full scale output –or an equivalent

value in kilograms. Please see the next section of this manual.

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7. PROGRAMMING YOUR TRANSMITTER

OVERVIEW

The SST Transmitter is easily programmed using a PC with an RS232 port and Instrument

Setup (IS) software, which provides a graphical user interface. This software is downloadable

at no charge from http://www.transducertechniques.com/online-manuals.aspx. It allows up-

loading, editing, downloading and saving of setup data, execution of commands under

computer control, listing, plotting and graphing of data.

If your PC has an RS232 port, the transmitter and PC can be connected via the 3-wire RS232

cable SST-RS232-AD9, whose wiring is shown below:

RS232 cable with rear view of DB9

connector to PC

If your PC only has a USB port but no RS232 port, connect the 3-wire RS232 cable SST-

RS232-AD9 to the RS232 to USB adapter cable SST-USB-AD9. This adapter cable is recom-

mended because it contains an FTDI chip, which is compatible with all versions of Windows,

including Windows 7 and 10.

GETTING STARTED WITH IS SOFTWARE

As a first step, temporarily set User Account Control (UAC) of Windows to “Never notify” so

that installation of “DPM-3/SST Instrument Setup”software can create directories. Use Google

for instructions on how to change UAC settings for your version of Windows. Following instal-

lation, return UAC to its previous setting.

To install IS software, download the file dpm-3-is.exe from our website and double-click on the

file name. Click on “Install Instrument Setup Software” and follow the prompts. To launch IS

software, press on Start => Programs => DPM-3 Digital Panel Meter => DPM-3 Instrument

Setup. The splash screen below will appear:

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The Communications Setup screen will automatically appear a few seconds after the splash

screen. Use this screen to select your communications Protocol, Device Type, and Commu-

nications Type. Selecting “None” for Communications Type allows you develop a setup file

without being connected to an actual transmitter.

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In the Establish Communications screen, select your Com Port and 9600 and the Baud Rate.

You will be able to change your protocol and baud rate later under the Communication setup

tab. Click on Establish, and the two fields at the bottom of the screen should turn green. Click

on the Main Menu button to open the Main Menu screen.

From the Main Menu screen, click on DPM => Get Setup to retrieve (or get) the existing setup

data from your DPM transmitter. Click on View => Setup to bring up screens which allow you to

easily edit the setup file using pull-down menus and other selection tools. You can download

(or put) your edited file into the transmitter by clicking on DPM => Put Setup. You can save

your setup file to disk by clicking on File => Save Setup and retrieve a previously saved file from

disk by click on File => Open.

The best way to learn IS software is to experiment with it.

For context-sensitive help for any data entry field under any tab, select that field and press the

F1 key.

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