# 3-RTD, 2-PROCESS, COUNTER INPUTS

### SMART INPUT MODULE

16-pin Terminal Block.

3 RTD Inputs, 2 Process Inputs, 1 Counter Input.

On-board Digital Signal

Processor.

Linearization RTDs 20 Hz averaged outputs 16-bit precision comparator function.

Interface to

Tiger Meter.

IDC Shielded Cable.

In user selectable lengths.

State-of-the-art

Electromagnetic Noise

Suppression Circuitry.

Ensures signal integrity even in harsh EMC environments.

Multiple inputs processed with powerful signal conditioning.

IST1 and IST2 are smart input modules that can monitor a combination of mixed temperature, process, and counter inputs. Both modules can accept three triple 3-wire RTD sensors, two 0-10 V / 4-20 mA process inputs, and a frequency input. Applied in multiple-point temperature measurement and automation / control applications, these modules can be user programmed to process any four of the six inputs, or programmed with a macro to process all six inputs.

Input Module

Order Code Suffix

Hardware Module Specifications

IST1 (50 Hz Rejection) IST2 (60 Hz Rejection)

RTD

Triple-input RTD

Excitation Current

Resolution & Range

Process Inputs

Dual Process Inputs

Mode

Counter CH1 Only Single Counter

Analog-to-digital

3-wire RTD configuration. Choice of Pt385 or Pt392.

160 A DC constant current source, ratiometric referenced to ATD.

0.1 C, 200 C to +850 C.

Bipolar, 88 mV full scale.

Voltage or current range set by attenuation resistors.

Configured in Tiger 320 controller.

Dual channel sigma delta ATD convertor.

16-bit resolution.

Shield drive +2.5 V.

Line Frequency Rejection

RTD Type

RTD Linearization

2-point Calibration

Sampling Speed

Software Module Specifications

50/60 Hz software selectable.

Pt385 / Pt392 sofware selectable.

On-board linearization tables for RTD.

Simple 2-point calibration of RTD & process inputs using Tiger 320 Series software.

800 / 960 Hz each channel, 20 Hz averaged outputs.

IST1_IST2 (NZ358)

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Page 1

### Component Layout

Connector Block

Interface to Sensors

See Connector Pinouts

for connection details

Attenuation Resistors

Used to set process inputs full scale

Figure 1 IST1/IST2 Triple RTD, Dual Process, Counter Smart Input Module

### Connector Pinouts

Connecting the sensors directly to the input module is an option, but it is far easier to connect sensors via the supplied 16-pin terminal block.

The external pinouts between the input module and the terminal block are shown in Figure 2.

1 3

2 4

9 11

16-pin

Connectors

Interface

to Tiger

Controller

Input

Module

IST1

3 M IDC Ribbon Cable

DIN-Rail

Mounted

Terminal

Block

16-pin Screw

Terminal Block

Interface to

Sensors

Figure 2 IST1/IST2 to 16-pin DIN-Rail Mounted Terminal Block Connections

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IST1_IST2 (NZ358)

Example

Triple 3-wire RTDs connected to the terminal block in series.

In Figure 3, a magnetostrictive displacement sensor having a 0-10 V output and a resistive type displacement sensor derive their power from the input modules +24 V excitation and act as two process inputs. The counter input is a square wave generator and is normally a flow sensor or optical pickup type also receiving +24 V.

### Overview

Figure 3 Triple 3-wire RTDs connected to the terminal block in series

There are two methods of configuring the IST1/IST2 smart input module:

By the user through the front panel using the code menus, or

By preconfiguring the controller with a macro.

Front Panel Programming

The controller has four input channels available for processing sensor input signals when programming through the front panel. All six sensors can be connected to the input module at the same time, but only four can be selected and processed at any one time.

Macro Programming

With a macro installed, the controller can process all six sensor input signals at the same time. A macro can be either pre-compiled and installed by Texmate before the module leaves the factory, or compiled and installed by the customer. See Page 10 for a brief overview of the Tiger Macro Development System (TDS).

A full set of tutorial documents for macro programming are available online at www.texmate.com.

Alternatively, printed copies can be sent on request.

Technical Description

Input module IST1/IST2 is designed for 3-wire RTDs that are either 100 type Pt385 or Pt392. A constant current source ratiometric referenced to a precision 16-bit ATD drives all three RTDs wired in series at the

Therefore, if only a single or dual RTD combination is required, the unused RTD inputs must be short circuited to ensure the constant current loop is maintained.

Example of dual RTD with RTD3 inputs short circuited to maintain current integrity

IST1_IST2 (NZ358)

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Functional Schematic

16-pin DIN-Rail

Terminal Block

RTD's

Dual

Process

Counter

Filtering

Multiplexers

EMF

EMF

EMF

Counter Input

MUX1

CH 1

MUX2

CH 2

Shield

Driver

+ 5 V

5 V

GND

+ 24 V

Exc.

Figure 4 Input Module IST1/IST2 Functional Schematic Diagram

The input module

accepts a counter or input such as pulse from a paddlewheel flow sensor or equivelant. If this option is used, CH1 automatically defaults

as the counter input.

External +24 V excitation and return is available to power external transducers if required.

Contact Texmate for

your required process

input type.

P1+

Example of attenuating

0-10 V to required signal range

0 to 10 V Full Scale

1 Megohm

8.06 k

0 to 75 mV Full Scale

Example of selecting

the correct current

shunt (4 ) to achieve a 0-80 mV signal corresponding to a 0-20 mA constant current input.

P1

P2+

0 to 20 mA

0 ohm

Current

Shunt

4 ohm

0 to 80 mV Full Scale

P2

The Tiger controller uses three smart setup registers to configure all smart input modules. Line frequency rejection (50 / 60 Hz) and RTD type are configured in smart register 1 (SMT1). See Figure 5.

Smart register 1 allows you to select the following settings:

Line frequency rejection of 50 or 60 Hz for all four sensor inputs.

RTD type: Pt385 or Pt392 for all RTD types.

A standard sampling rate of 800 / 960 Hz (50 / 60 Hz) is applied to all inputs.

### Smart Setup Registers

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IST1_IST2 (NZ358)

RTD1

RTD2

RTD3

Process 1

Process 2

Counter

Figure 5 IST1/IST2 Smart Setup Registers Operational Flow Diagram

### Programming Procedures

The input module requires the following individual inputs to be programmed through the configuration menus in the controller:

1 Select Line Frequency Rejection & RTD Type

This menu allows you to select the input signal line frequency rejection for all input signals (50 or

60 Hz) and the RTD type for all RTD inputs (Pt385 or Pt392) using Smart Register 1 (SMT1).

2 Setup Counter or Frequency Input

If a counter or frequency signal is used, this menu allows you to configure the frequency range or counter settings.

3 Select a Channel for the RTD or Process Input

In the code for the required channel, select the relevant RTD or process input from the output register map.

Note: If a counter or frequency signal is not used, CH1 is available for RTD or process inputs.

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## Select RTD Type

Enter Code 2 and select the RTD type and input signal line frequency rejection setting for all inputs

buttons at the same time to enter the main programming

The 1st digit setting is not relevant to this procedure and can remain at zero (0).

This setting enters the smart register 1 code setup menu.

Note: The output registers in the 3rd digit are specific to the IST1/IST2 input module.

These registers vary for each different smart input module.

Note: The 20 Hz averaged signal is output for all five inputs.

This menu provides settings unique to smart register 1 of input module IST1/IST2.

2nd digit settings are not relevant and should be left at zero (0).

## Setup Counter or Frequency Input

On leaving Code 2, setup counter or frequency settings

5 Press the P button. The display returns to [Cod_2] [X77].

6 Using the

Frequency

Note, leaving the 3rd digit as 7 means the display constantly cycles between [Cod_2] and [SMt1].

For Frequency

For Counter

## CH1

Frequency

buttons at the same time to return to the operational display.

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IST1_IST2 (NZ358)

## Select a Channel

Select a channel for the RTD or process input from the output register map of the required channel

Channel 1

If a counter or frequency input has not been applied to CH1, then this channel is still available for an RTD or process input signal. To select an RTD or process signal for CH1:

buttons at the same time again to re-enter the main programming mode, then

Set Code 2 to [X7X]. Select the required processing rate for all input sensors in the 1st digit and the required RTD or process signal in the 3rd digit.

## CH1

Note: The output register map is different for each smart input module type.

### Channel 2

Enter Code 4 and set to [0X0]. Select the required register map settings for CH2 in the 2nd digit. See *Note in 2nd digit below.

## CH2

### Channel 3

Enter Code 5 and select the required register map settings for CH3 in the 3rd digit.

## CH3

### Channel 4

Enter Code 6 and select the required register map settings for CH4 in the 3rd digit.

## CH4

buttons at

to return to

Note: Unlike CH1, you cannot select Averaged

Process 2 in CH2.

Note: The output register map is different for each smart input module type.

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### Example 1:

### User Programmable

### Application

Example 1 describes the setup procedure for measuring the volume, temperature, and flow rate of a milk vat using front panel programming.

The volume of the milk vat is monitored using a linear displacement transducer and float arrangement. A pump transfers the milk past a flow rate sensor. The milk vat temperature and discharge temperature are monitored using type Pt392 RTD sensors.

The input module is wired via the 16-pin DIN-rail mounted terminal block. See Figure 7 for connection details between the terminal block and the input sensors. The inputs are designated to the following channels:

CH1: Flow rate sensor

Milk Volume Application

Frequency input.

CH2: Milk vat temperature

RTD2 input.

CH3: Discharge temperature

RTD3 input.

CH4: Milk volume

Process 1 input.

Milk Vat

Note: RTD1 is not used. Process input 2 is not used. The frequency input automatically defaults to CH1.

## MILK

### Terminal Block Wiring

Figure 6 Example 1: Using IST1/IST2 in a User Programmable Application

MILK

Flow

Rate

Sensor

16-PIN DIN-Rail Terminal Block

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IST1_IST2 (NZ358)

Figure 7 Example 1: Application Wiring of Sensor Inputs to 16-pin Terminal Block

### Example 1 Setup Procedure

1 Select 50 Hz input line frequency rejection with Pt392 RTDs.

The averaged output rate of 20 Hz for all sensor inputs is more than adequate for fast filling / draining of the milk vat:

Display toggles between

Set

2 Select CH1 frequency input of 2 Hz - 1000 Hz for the flow rate sensor:

3 Select RTD2 as the vat temperature input for CH2:

select

4 Select RTD3 as the discharge temperature input for CH3:

select

5 Select process input 1 as the milk volume input for CH4:

select

Note: both RTD inputs (RTD2 and RTD3) and the linear displacement transducer input (Process Input 1) require to be individually calibrated using the controllers 2-point calibration technique.

### Example 2:

### Application Running a

### Macro

The IST1 and the IST2 have 5 active smart output registers available. Access to the fifth register (or all registers) can be done through a simple macro string as demonstrated in the example macro below.

First set Code 7 to [000] so that the Result register (& Result) is not updated by any math function. In the example macro below the Main Macro defines the Result register as the 5th smart output register (&SMART_RESULT5). In this way CH1 to CH4 contain the first four smart output registers and the Result contains the fifth.

Macros are powerful tools used to increase the versatility and range of the Tiger controller beyond the standard code settings. For further information on macros and the registers in the Tiger 320 operating system see the following literature:

TDS Macro Tutorial (NZ212).

Registers Supplement (NZ209).

These and other Tiger related documents are freely available on our website at:

### www.texmate.com

IST1_IST2 (NZ358)

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### RTD Full Scale

### Calibration Procedures

### Tiger Macro Development

### System (TDS)

The RTDs can be calibrated in F or C. Using a calibration source to calibrate a zero and full scale setting is the easiest method to use. If a calibration source is not available, the known resistance values for the temperatures can be used.

The following table lists the equivelant resistances for both Pt385 and Pt392 type 100 RTDs over a temperature range of 0 to 100 C.

RTD Type

Type Pt385 / 392 Type Pt385

Type Pt392

Temperature

0 C

100 C

100 C

Equivelant Resistance

100

138.5

139.3

If a calibration source is not available make up a set of calibration plugs with the resistors shown in the diagrams opposite.

Plug the 0 C calibration plug into the module and program the [ZEro] setting for the first channel required.

Unplug the 0 C plug and plug the

100 C calibration plug into the module and program the [SPAn] setting for the same channel.

Resistor Connections for Zero (low) Setting

Resistor Connections for Span (high) Setting

Example 2-point Calibration Procedure The example 2-point calibration procedure on Page 11 can be used with a calibration source or with the calibration plug method. Enter the calibration mode and carry out the 2-point calibration procedure on the first channel required for RTD input.

Repeat this procedure for any other channels requiring an RTD input.

Tiger 320 Macro Overview The Tiger 320 Series of programmable meter controllers have been designed to incorporate the analog and digital functionality of an intelligent controller with the logic of a PLC.

Traditionally, the PLC approach is to build a working application entirely in some form of programming language. The approach used in the Tiger 320 Series of controllers is to build an application by selecting the pre-programmed functions of the controller and then adding small amounts of programmability and logic where needed.

The operating system of the Tiger 320 controller controls all the pre-programmed functions, handling the input, averaging, scaling, linearization, totalization and much more, as well as driving the display, timers, relays, analog and serial outputs. Once configured, these functions are executed by the operating system and form the basis of a control system.

To form an advanced automation and control system you only need to write a small program that adds the extra logic required. We call this program a macro. A macro can be written specifically for your application and is used to initiate a sequence, reconfigure, or disable some of the controller functions. With Texmate's 22 I/O plug-in module installed, a macro further expands the Tiger 320 operating system with additional digital status inputs and digital switched outputs.

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IST1_IST2 (NZ358)

From Step 6

2-point Cal.eps

START HERE

2-point Calibration

Mode Example

Step 1

Enter the

brightness

mode

Step 2

Pass the brightness

mode and the enter calibration mode

Step 4

Enter calibration

mode [111] for 2-point calibration of CH1

LOW

Signal

Step 5

5.1. Adjust display to desired reading for

zero input

Example

Example

HIGH

Signal

Step 7

7.1. Adjust display to desired reading for

span input

Step 8

Save zero and span settings and re-enter

calibration mode

Step 9

Select the no function calibration mode [000]

Step 10

Save calibration mode

[000] setting and enter Code 1

Step 11

Exit Code 1 and return to the operational display

### To Step 7

Macro control is ideal for many OEM applications that require analog, digital, and timer functions with sophisticated mathematical and enhanced logic operations. The macro concept has major cost advantages for large or small sophisticated applications that require some degree of programmable logic control with display and front panel control.

Custom Macro Programming

Texmates Tiger Development System (TDS) enables a macro to be written and compiled in BASIC, utilizing any combination of the hundreds of functions and thousands of registers embedded in the Tiger 320 Operating System. When your BASIC program is compiled into Tiger

320 Macro-language it is error checked and optimized.

IST1_IST2 (NZ358)

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Macros are useful when implementing a specialized control system that cannot be achieved by the standard configuration capability of the Tiger 320 Operating System. Using the TDS software, functions can be altered or added in a standard controller to perform the required job.

This may typically include logic sequencing functions and mathematical functions.

Developing a Macro is much easier and quicker than programming a PLC, because the basic code required to customize the Tiger meter is considerably less than the ladder logic programming required for PLCs. This is due to the hundreds of functions built into the Tiger controller that can be manipulated or invoked by a macro to fulfill the requirements of almost any application.

Scrolling display messages can be programmed to appear with any setpoint activation, selected event, or logic input. Easy to read, plain text prompts can be programmed to replace the manual programming codes and provide a user-friendly interface for any custom application.

Scrolling Text Messaging

Scrolling text messaging is another bonus from running a macro. Any number of messages for detailed operator instructions, of up to 100 characters each, can be written into the macro during compilation for detailed operator instructions, alarm and control applications.

A scrolling text message can be written for OEMs and sensor manufacturers providing informative instructions for setup and calibration procedures.

Alphanumeric Displays

14-segment alphanumeric displays are Texmates display choice for easy to read display text and scrolling text messaging.

7-SEGMENT

14-SEGMENT

### Customer Configuration Settings:

1st Digit

2nd Digit 3rd Digit

## CH1

## CH2

1st Digit

2nd Digit 3rd Digit

1st Digit

2nd Digit 3rd Digit

1st Digit

2nd Digit 3rd Digit

## CH3

## CH4

1st Digit

2nd Digit 3rd Digit

For product details visit www.texmate.com

Tel: 1-760-598-9899 USA 1-800-839-6283 Thats 1-800-TEXMATE

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IST1_IST2 (NZ358)

### About TexMate

Texmate is an American manufacturer of high durability industrial grade panel meters, bar graphs, and transducers. Texmate's meters are frequently equipped with relays and various signal outputs for industrial automation applications and are known for their extremely long service life.