### SMART INPUT MODULE

# Triple RTD

On-board Digital Signal

Processor.

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

Interface to

Tiger Meter.

State-of-the-art

Electromagnetic Noise

Suppression Circuitry.

Ensures signal integrity even in harsh EMC environments.

Perfect module for 3 phase dry transformer temperature

measurement.

IST7 and IST8 are smart input modules that can monitor temperature. Both modules can accept triple 2/3/4-wire RTD sensors. Applied in multiple-point temperature measurement.

0.01o accuracy on three channels.

Input Module

Order Code Suffix

IST7 (50 Hz Rejection) IST8 (60 Hz Rejection)

Hardware Module Specifications

RTD

Triple-input RTD

Excitation Current

Resolution & Range

Analog-to-digital

2/3/4-wire RTD configuration. Choice of Pt385 or Pt392.

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

0.01 C, 200 C to +850 C.

Dual channel sigma delta ATD convertor.

16-bit resolution.

Shield drive +2.5 V.

Software Module Specifications

Line Frequency Rejection 50/60 Hz software selectable.

RTD Type

RTD Linearization

2-point Calibration

Pt385 / Pt392 sofware selectable.

On-board linearization tables for RTD.

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

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

Sampling Speed

Texmate, Inc. Tel. (760) 598-9899 www.texmate.com

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### Component Layout

Figure 1 IST7/IST8 Triple RTD Input Module

### Connector Pinouts

### Function Schematic Diagram

Functional Schematic

160 A

Crystal Control

Filtering

Multiplexers

EMF

EMF

EMF

MUX1

CH 1

+ 5 V

5 V

GND

+ 24 V

Exc.

Figure 2 Input Module IST7/IST8 Functional Schematic Diagram

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### Smart Setup Registers

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 3.

Smart register 1 allows you to select the following settings:

Line frequency rejection of 50 or 60 Hz for all three RTD 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.

The module produces three output registers (3 RTD), each being the 20 Hz averaged result of the input sensors. One of these registers can be transferred to CH1 via Code 2, the same or another register transferred to CH2 via Code 4, the same or another register transferred to CH3 via Code 5, and the same or another register transferred to CH4 via Code 6.

RTD1

RTD2

RTD3

Figure 3 IST7/IST8 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 Select a Channel for the RTDs

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

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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 IST7/IST8 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 IST7/IST8.

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

## Select a Channel

Select a channel for the RTD.

Channel 1 = RTD1 To select an RTD1 for CH1:

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

Set Code 2 to [X70]. Select the required processing rate for all input sensors in the 1st digit and RTD1 in the 3rd digit.

## CH1

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

### Channel 2 = RTD2

Enter Code 4 and set to [050]. Select the RTD2 for CH2 in the 2nd digit. See *Note in 2nd digit below.

## CH2

### Channel 3 = RTD3

Enter Code 5 and sert to [X72]. Select RTD3 for CH3 in the 3rd digit.

## CH3

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

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### RTD Full Scale

### Calibration Procedures

### Tiger Macro Development

### System (TDS)

Page 6

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.

Resistor Connections for Zero (low) Setting

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 Span (high) Setting

Example 2-point Calibration Procedure The example 2-point calibration procedure on Page 7 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.

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.

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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

1st Digit

2nd Digit 3rd Digit

## CH1

## CH2

## CH3

1st Digit

2nd Digit 3rd Digit

1st Digit

2nd Digit 3rd Digit

For product details visit www.texmate.com Local Distributor Address

Tel: 1-760-598-9899 USA 1-800-839-6283 Thats 1-800-TEXMATE Fax: 1-760-598-9828 Email: [email protected] Web: www.texmate.com

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### 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.