Omega Products DIN-111 User Manual

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DIN-100 OMEGABUS®Series

DIN RAIL MOUNT DIGITAL TRANSMITTERS

140

Basic Unit

 Complete Sensor to

RS-485 Interface

 500V RMS Analog

Input Isolation

 15-Bit Measurement

Resolution

 Continuous Self-

Calibration; No Adjustments of any Kind

 Programmable Digital

Filter

 Requires +5VDC Supply  Transient Suppression

on RS-485 Communications Lines

 Screw Terminal Plug

Connectors Supplied

APPLICATIONS  Process Monitoring

and Control

 Remote Data Logging

to any Host Computer

 Product Testing  Interface to PLC

The selections are stored in nonvolatile EEPROM which maintains data even after power is removed.

The key to the DIN-100 Series is that the modules are easy to use. You do not need engineering experience in complicated data acquisition hardware. With these modules, anyone familiar with a personal computer can construct a data acquisition system. This modular approach to data acquisition is extremely flexible, easy to use and cost effective. Data is acquired on a per channel basis so you only buy as many channels as you need. The modules can be mixed and matched to fit your application. They can be placed remote from the host and from each other. You can string up to 247 modules on a twisted pair of wires by using RS-485 with repeaters.

All modules are supplied with screw terminal plug connectors. The connectors allow system expansion, reconfiguration or repair without disturbing field wiring. No charge utility software is available to make the DIN-100 modules easier to learn and use.

THEORY OF OPERATION

Each module is a complete singlechannel data acquisition system. Each unit contains analog signal conditioning circuits optimized for a specific input type. Sensor signals are converted to digital data with a microprocessor-controlled integrating A/D converter. Offset and gain errors in the analog circuitry are continuously monitored and corrected using microprocessor techniques. The DIN-100 module converts the digital signal data and stores the resultant data in a memory buffer. The modules continuously convert data at the rate of 8 conversions per second and store the latest result in the buffer.

Host processors may request data by sending a query to the module. The DIN-100 module will instantly respond by communicating the memory buffer data back to the host processor. Up to 247 modules may be linked to a single RS-485 port. Each module on a serial line is identified by a unique userprogrammable address. This addressing technique allows modules to be interrogated in any order.

The DIN-100 Sensor to Computer Modules are a family of data acquisition modules that convert analog input signals to serial data and transmit via RS-485 to a master unit which may be a computer or other processor-based equipment. The modules can measure temperature, bridge inputs, voltage, current, digital input or digital output signals. The modules provide direct connection to a wide variety of sensors and perform all signal conditioning, scaling, linearization and conversion to either linearized ASCII data values or Modbus RTU data values. Features such as address, baud rate, parity, echo, etc., are selectable using simple commands from your serial port.

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DIGITAL INPUTS/OUTPUTS

DIN-170 digital output modules contain open-collector transistor switches that may be controlled by the host processors. These switches may be used to control solid-state relays which in turn may control heaters, pumps and other power equipment. The digital inputs may be read by the host processor and used to sense the state of remote digital signals. They are ideal for sensing the state of limit or safety switches.

DIGITAL FILTER

The DIN-100 analog input modules include two unique programmable single pole digital filters. The filter is used to smooth analog data in noisy environments. Separate time constants may be specified for small and large signal changes. Typically a large time constant is specified for small signal changes to filter out noise and provide stable output readings. A smaller time constant may be chosen for large signal changes to provide fast response to such changes.

COMMAND SET

The DIN-100 Series uses the Modbus RTU or ASCII protocol for communication. The Modbus RTU binary protocol uses a master-slave technique, in which only the master device can initiate transactions. The slave devices respond by supplying the requested data to the master or by taking the action requested in the query. The master can address any slave device. The returned messages are considered response messages. The supported master codes are below in the chart.

Modbus RTU Functions and Descriptions

01 Read Coil Status

(Digital Inputs)

04 Read Input Register

(Analog Inputs)

05 Force Single Coil

(One Digital Output)

06 Preset Single Register

(RTU Protocol)

15 Force Multiple Coils

(Multiple Digital Output)

The ASCII protocol is a command and response protocol using ASCII characters for easy troubleshooting and interpretation of data values.

SETUP

DIN-100 modules are initiated at the factory using the ASCII protocol. This allows setup and configuration, including the Modbus device address, to be easily performed using the utility setup software or a dumb terminal. Each DIN-100 module must be properly configured before installation into a Modbus system.

UTILITY SOFTWARE

Complimentary Utility Software is included with each purchase order. The software is compatible with Windows 95, 98, NT 4.0+, 2000

operating systems and distributed on CD-ROM. The Utility Software simplifies configuration of all userselectable options such as device address, baud rate and filtering constants. The latest version of the software is always downloadable from our web site.

PROCESS CONTROL SOFTWARE

Modbus RTU protocol is supported by virtually all commercial process control software programs available today. These programs operate on IBM and compatible personal computers in the Windows 95, 98, NT and IBM OS/2 environments.

DIN-100 Series ASCII Command Set

Command and Definition Typical Command Typical Response

Message ($ prompt) Message

DI Digital Input $1D1 *0003 DO Digital Output $1DOFF * RD Read Data $1RD *+00072.00 RS Read Setup $1RS *31070142 RZ Read Zero $1RZ *+00000.00 WE Write Enable $1WE *

Write Protected Commands

CZ Clear Zero $1CZ * RR Remote Reset $1RR * SU Setup Module $1SU31070142 * TS Trim Span $ITS+00600.00 * TZ Trim Zero $1TZ+00000.00 *

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ENVIRONMENTAL Operating Temperature Range:

-25 to 70°C (-13 to 158°F)

Storage Temperature Range:

-25 to 85°C (-13 to 185°F) Relative Humidity: 0 to 95% noncondensing

MECHANICALS AND DIMENSIONS

Case: ABS case with captive

hardware Connector: screw terminal barrier plug (supplied)

SPECIFICATIONS FOR SPECIFIC MODULES DIN-100 VOLTAGE INPUTS Voltage Ranges: +

10mV, +100mV, +1V, +5V, +10V, +100Vdc

Resolution: 0.01% of FS (4 digits) Accuracy: +0.02% of FS max Common Mode Rejection: 100dB

at 50/60Hz Zero Drift: +1 count max (autozero)

Span Tempco: +50ppm/°C max Input Burnout Protection:

to 250Vac normal mode

Input Impedance:

< +1V input = 100MΩ min; > +5V input = 1MΩ min

DIN-120 CURRENT INPUTS Currents: 4-20 mAdc Resolution: 0.04% of FS Accuracy: 0.04% of FS

Common Mode Rejection:

100dB at 50/60Hz Zero Drift: +

1 count max

(autozero)

Span Tempco:

+50ppm/°C max

Voltage Drop: +0.1V max

DIN-130 THERMOCOUPLE INPUTS Thermocouple Input:

automatic cold junction compensation and linearization, open thermocouple indication, overrange indication Thermocouple Types: J, K, T, E, R, S, B, C (factory set) Ranges: J = -200 to 760°C; B = 0 to 1820°C; K = -150 to 1250°C; S = 0 to 1750°C; T = -200 to 400°C; R = 0 to 1750°C; E = -100 to 1000°C; C = 0 to 2315°C

Resolution: +1° Overall Accuracy (error from all sources) from 0 to 40°C Ambient: +1.0°C max (J, K, T, E);

+2.5°C max (R, S, B, C) (300°C to FS)

Common Mode Rejection:

100dB at 50/60Hz

Input Impedance: 100 MΩ min

Lead Resistance Effect: <20µV

per 350 Ω

Input Burnout Protection:

to 250Vac normal mode

DIN-100 COMMON SPECIFICATIONS

(typical at +25°C and nominal power supply unless otherwise noted)

ANALOG Channels: single channel

analog input Common Mode Rejection: 500V RMS max CMV, input to output at 60Hz Leakage Current: input to output at 115V RMS, 60Hz; <2µA RMS Resolution: 15 bit measurement resolution Conversion Speed: 8 conversions per second Calibration: autozero and autocalibration; no adjustment pots

DIGITAL Microcomputer: 8-bit CMOS;

digital scaling, linearization and calibration Memory: nonvolatile memory eliminates pots and switches

DIGITAL FILTERING Filtering: small and large signal

with user selectable time constants from 0 to 16 seconds

COMMUNICATIONS Protocol: communications in ASCII

or MODBUS-RTU via RS-485 ports Baud Rates: selectable baud rates; 300, 600, 1200, 2400, 4800, 9600, 19200, 38400 Data Format: NRZ asynchronous data format; 1 start bit, 8 data bits, 1 parity bit and 1 stop bit

Parity: odd, even, none Address: user selectable

channel address Multi-Drop Modules: up to 247 multi-drop modules per host serial port Communications: distance up to 4,000 feet (RS-485)

Transient Suppression:

on RS-485 communications lines

Communications Setups:

stored in EEPROM

POWER Requirements: regulated +5Vdc,

0.75W max (DIN-150, 2.0W max); protected against power supply reversals

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To Order

(Specify Model Number)

Model No. Price Description Voltage Input

DIN-110 $180 +/-10mV input/RS-485 output DIN-111 180 +/-100mV input/RS-485 output DIN-112 180 +/-1V input/RS-485 output DIN-113 180 +/-5V input/RS-485 output DIN-114 180 +/-10V input/RS-485 output DIN-115 180 +/-100V input/RS-485 output

Current Inputs

DIN-125 180 4-20mA input/RS-485 output

Thermocouple Inputs

DIN-131 180 J thermocouple input/RS-485 output DIN-132 180 K thermocouple input/RS-485 output DIN-133 180 T thermocouple input/RS-485 output DIN-134 180 E thermocouple input/RS-485 output DIN-135 180 R thermocouple input/RS-485 output DIN-136 180 S thermocouple input/RS-485 output DIN-137 180 B thermocouple input/RS-485 output DIN-138 180 C thermocouple input/RS-485 output

RTD/Thermistor Inputs

DIN-141 180 .00385 RTD input/RS-485 output DIN-142 180 .00392 RTD input/RS-485 output DIN-143 180 .00388 RTD input/RS-485 output

DIN-145 180 2252Ω thermistor input/RS-485 output

Bridge Inputs

DIN-151 250 +/-60mV bridge input, 5V excitation/RS-485 output DIN-152 250 +/-60mV bridge input,10V excitation/RS-485 output DIN-153 250 +/-120mV bridge input, 5V excitation/RS-485 output DIN-154 250 +/-120mV bridge input,10V excitation/RS-485 output

Timer and Frequency Inputs

DIN-161 180 Frequency input/RS-485 output

Digital Inputs/Outputs

DIN-171 140 6 digital inputs/RS-485 output DIN-172 140 6 digital outputs/RS-485 output

RS-232/485 Converter/Repeater

DIN-191 120 RS-232/485 converter DIN-192 120 RS-485 repeater

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DIN-170 DIGITAL INPUTS/OUTPUTS

Digital I/O: 6 digital inputs or 6

digital outputs; inputs/outputs are read/set in parallel Isolation: isolated from power supply ground Input Voltage Levels: +30V without damage Input Switching Levels: high,

3.5V min: low, 1.0V max Outputs: open collector to 30V, 100mA max. load

Vsat: 1.0V max @ 100mA

DIN-190 RS232/485 CONVERTER/REPEATER

Baud Rates: 300-115200

(dip-switch selectable)

Termination and Biasing Resistors: included (selectable

via internal jumpers)

Isolation: 500Vrms

DIN-140 RTD INPUTS RTD Input: automatic linearization

and lead compensation

RTD Types: α = .00385, .00392, 100 Ω at 0

°C; .00388, 100 Ω at 25°C

Ranges: .00385 = -200 to 850°C;

.00392 = -200 to 600°C; .00388 = -100 to 125°C

Resolution: 0.1°C Accuracy: +0.3°C Common Mode Rejection: 100dB

at 50/60Hz

Input Connections: 2, 3, or 4 wire Excitation Current: 0.25mA Lead Resistance Effect:

3 wire - 2.5°C per Ω of imbalance;

4 wire - negligible

Max Lead Resistance: 50 Ω

Input Burnout Protection:

to 120Vac common mode

DIN-145 THERMISTOR INPUTS

Thermistor Types: 2252 Ω at 25

°C

Range: 0 to 100°C Resolution: 0.01°C or °F Accuracy: +0.1°C Common Mode Rejection: 100dB

at 50/60Hz

Input Burnout Protection:

to 30Vdc common mode

DIN-150 BRIDGE INPUTS Voltage Ranges:

60mV, +/-120mV

Resolution: 10µV Accuracy: +0.05% of FS max Common Mode Rejection:

100dB at 50/60Hz

Input Burnout Protection:

to 30Vdc common mode

Offset Control: full input range Excitation Voltage: 5Vdc, 10Vdc,

50mA max

Zero Drift: +1µV/°C max Span Tempco: +50ppm/°C max

DIN-160 FREQUENCY INPUTS Range: 1Hz to 20KHz Resolution: 0.005% of reading

+ 0.01Hz Accuracy: +

0.01% of reading

+0.01Hz

Tempco: +20ppm/°C Input Impedance: 1MΩ Switching Level: selectable 0V,

+2.5V

Hysteresis: adjustable, 10mV-1.0V Input Burnout Protection: 250Vac

common mode

Each unit is supplied with a compete operator's manual and software on CD rom. Ordering Example: DIN-132 type K thermocouple input, RS-485 output DIN rail mount digital transmitter and OMEGACARESM1-year extended warranty for DIN-132 (adds 1 year to standard 1-year warranty) and DIN-191 RS232/485 converter and

OMEGACARESM2-year extended warranty for DIN-191 (adds 2 years to standard 1-year warranty), $180 + 25 + 120 + 25 = $350.

Omega Products DIN-111 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual