D5451M [RHOPOINT]

FOUR CHANNEL SENSOR TO COMPUTER INTERFACE MODULES; 四通道传感器，计算机接口模块


型号：	D5451M
厂家：	RHOPOINT COMPONENTS
描述：	FOUR CHANNEL SENSOR TO COMPUTER INTERFACE MODULES 四通道传感器，计算机接口模块传感器计算机
文件：	总4页 (文件大小：53K)
中文：	中文翻译
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D5000M SERIES FOUR CHANNEL

SENSOR TO COMPUTER INTERFACE MODULES

D5000M FEATURES

• Four analog input channels.

GENERAL DESCRIPTION

The D5000M series are similar to the D5000 series but

use the Modbus RTU protocol for communication. The

modules convert four analog input signals to engineering

units and transmit in ASCII format to any host with stan-

dard RS-485 or RS-232 ports. These modules can

measure temperature, voltage and current. The modules

provide direct connection to a wide variety of sensors and

perform all signal conditioning, scaling, linearization and

conversion to engineering units.

• Complete sensor to RS-485 or RS-232 interface.

• Modbus RTU or DGH ASCII communications protocol.

• 500V rms analog input isolation.

• 15 bit measurement resolution.

• Continuous self-calibration; no adjustments of any kind.

• Programmable digital filter.

• Requires +10V to +30Vdc unregulated supply.

• Transient suppression on RS-485 communications lines.

• Screw terminal plug connectors supplied.

• CE marked.

The modules contain no pots or switches to be set.

Features such as address, baud rate, parity, echo, and

scaling are selectable using simple commands over the

communications port—without requiring access to the

module. The selections are stored in nonvolatile

EEPROM which maintains data even after power is

removed.

APPLICATIONS

• Process monitoring and control

• Remote data logging to any host computer

• Product testing

• Direct connection to modems

• Direct connection to PLC.

D5000M SPECIFICATIONS (typical at +25°C and nominal power supply unless otherwise noted)

D5100M Voltage Inputs

Analog

• Voltages: ±100mV, ±1V, ±5V, ±10V, ±100Vdc.

• Resolution: 0.01% of FS (4 digits).

• Accuracy: ±0.02% of FS max.

• Zero drift: ±1 count max (autozero).

• Span tempco: ±50ppm/°C max.

• Input burnout protection to 250Vac .

• Input impedance: ≤ ±1V input =100MΩ min.

≥ ±5V input =1MΩ min.

• Four channel analog input.

• Maximum CMV, input to output at 60Hz: 500V rms.

• Leakage I, input to output at 115Vrms, 60Hz: <2µA rms.

• 15 bit measurement resolution.

• 8 conversions per second.

• Common mode rejection: 100dB at 50/60Hz.

• Autozero & autocalibration—no adjustment pots.

Digital

D5200M Current Input

• 8-bit CMOS microcomputer.

• Current: 4-20mAdc.

• Digital scaling, linearization and calibration.

• Nonvolatile memory eliminates pots and switches.

• Small and large signal digital filtering with user selectable

time constants.

• Resolution: 0.04% of FS.

• Accuracy: 0.04% of FS.

• Zero drift: ±1 count max (autozero).

• Span tempco: ±50ppm/°C max.

• Voltage drop: 1.0V max.

Communications

• Communications in ASCII via RS-232C, RS-485 ports.

• Selectable baud rates: 300, 600, 1200, 2400, 4800,

9600, 19200, 38400, 57600, 115200.

D5300M Thermocouple Inputs

• Thermocouple types: J, K, T, E (factory set).

• NRZ asynchronous data format; 1 start bit, 7 data bits,

1 parity bit and 1 stop bit.

• Ranges: J = -200°C to +760°C

T = -200°C to +400°C

K = -150°C to +1250°C E = -100°C to +1000°C

• Resolution: ±1°.

• Parity: odd, even, none.

• Overall Accuracy (error from all sources) from 0 to +40°C

ambient: ±1.0 °C .

• Input impedance: 100MΩ min.

• Lead resistance effect: <20µV per 350Ω.

• User selectable channel address.

• Modbus RTU or DGH ASCII communications protocol.

• Up to 247 multidrop modules per host serial port.

• Communications distance up to 4,000 feet (RS-485).

• Transient suppression on RS-485 communications lines. • Open thermocouple and overrange indication.

• Input burnout protection to 250Vac.

• Automatic cold junction compensation and linearization.

• Communications error checking via checksum.

• All communications setups stored in EEPROM.

Power

D5450M Thermistor Inputs

• Thermistor types: 2252Ω at 25°C.

• Range: -0°C to +100°C.

• Resolution: 0.01°C or F.

• Accuracy: ±0.1°C.

Requirements: Unregulated +10V to +30Vdc, 0.75W max

Protected against power supply reversals.

Environmental

Temperature Range: Operating -25°C to +70°C.

Storage -25°C to +85°C.

Relative Humidity: 0 to 95% noncondensing.

• Input protection to 30Vdc .

Warranty

D5000M Mechanicals and Dimensions

Case: ABS with captive hardware.

12 months on workmanship and material.

Connectors: Screw terminal barrier plug (supplied).

Replace with Phoenix MSTB 1.5/10 ST 5.08 or equivalent.

Specifications are subject to change without notice.

NOTE: Spacing for mounting screws = 2.700" (6.858 cm).

Screw threads are 6 X 32.

General Description (Continued)

with string functions common to most high-level languages

such as BASIC. For computers that support standard ports

such as RS-232, no special machine language software

drivers are necessary for operation. The modules can also

be connected to auto-answer modems for long-distance

The key to the DGH product concept is that the modules

are easy to use. You do not need engineering experience

in complicated data acquisition hardware. With the DGH

modules, anyone familiar with a personal computer can

construct a data acquisition system. This modular approach operation without the need for a remote supervisory

to data acquisition is very flexible, easy to use and cost

effective. The modules can be mixed and matched to fit

your application. They can be placed remote from the host

and from each other.

computer. The ASCII format makes system debugging

easy with a dumb terminal.

Because the Modbus protocol does not support echoing

D5000M RS-232 modules may not be daisy-chained. This

limits you to one four-channel module per RS-232 port.

The D5000M series is completely hardware and software-

compatible with the DGH D1000, D2000, D3000 and

D4000 series and may be mixed in any combination.

RS-485 was developed for multidropped systems that can

communicate at high data rates over long distances. RS-

485 receivers can handle common mode voltages from -7

to +12V without loss of data, making them ideal for trans-

mission over great distances. Since an RS-485 system

cannot transmit and receive at the same time it is a half-

duplex system. For systems requiring many modules,

high speed or long distances RS-485 is recommended.

All modules are supplied with removeable screw-terminal

connectors and captive mounting hardware. The connec-

tors allow system expansion, reconfiguration or repair

without disturbing field wiring.

THEORY OF OPERATION

D5000M modules are complete four-channel data

acquisition systems. Each unit contains analog signal

conditioning circuits optimized for a specific input type. The

amplified sensor signals are converted to digital data with

a microprocessor-controlled integrating A/D converter.

Offset and gain errors in the analog circuitry are continu-

ously monitored and corrected using microprocessor

techniques. The D5000M converts the digital signal data

into engineering units using look-up tables. The resultant

data is stored in ASCII format 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.

COMMAND SET

The D5000M series uses the Modbus RTU or the

DGH 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 ac-

tion requested in the query. The master can address

any slave device. The returned messages are consid-

ered response messages. The supported master

codes are:

Host processors may request data by sending a query

to the module. The D5000M 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 or one module to a RS-232C port.

Each module on a serial line is identified by a unique

user-programmable address. This addressing tech-

nique allows modules to be interrogated in any order.

Modbus RTU Functions and Descriptions

04 Read Input Register (Analog Inputs)

06 Preset Single Register (DGH/RTU Protocol)

The DGH ASCII protocol is a command and response

protocol using ASCII characters for easy troubleshooting

and interpretation of data values.

D5000M Series ASCII Command Set.

Command and Definition

Typical

DIGITAL FILTER

Command

Message

($ prompt)

$1MBD

Response

Message

The D5000M options include a unique programmable

single pole digital filter. 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.

MBD Modbus Disable

Read Data

$1RD

*+00072.00

*0102

*31070142

*+00000.00

RMA Read Module Address $1RMA

Read Setup

Read Zero

$1RS

$1RZ

$1WE

WE Write Enable

Write Protected Commands.

COMMUNICATIONS

Clear Zero

$1CZ

The D5000M are designed to be easy to interface to all

popular computers and terminals. All communications to

and from the module are performed with printable ASCII

characters. This allows the information to be processed

Remote Reset

Setup Module

Trim Span

$1RR

$1SU31070142

$1TS+00600.00 *

Trim Zero

$1TZ+00000.00

$MBR01

MBR Write Slave Address

SETUP

ORDERING GUIDE

The D5000M series are initiated at the factory using the

DGH ASCII protocol. This allows setup and configuration,

including the Modbus device address, to be easily per-

formed using the DGH setup software or a dumb terminal.

Each D5000M module must be properly configured before

installation into a Modbus system.

MODEL INPUT/OUTPUT

Voltage Inputs

D5111M 100mV Input/RS-232 Output

D5112M 100mV Input/RS-485 Output

D5121M 1V Input/RS-232 Output

D5122M 1V Input/RS-485 Output

D5131M 5V Input/RS-232 Output

D5132M 5V Input/RS-485 Output

D5141M 10V Input/RS-232 Output

D5142M 10V Input/RS-485 Output

D5151M 100V Input/RS-232 Output

D5152M 100V Input/RS-485 Output

Current Input

UTILITY SOFTWARE

Complimentary Utility Software is included with each pur-

chase 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 user-

selectable options such as device address, baud rate and

filtering constants. The latest version of our software is always

downloadable from our web site at www.dghcorp.com.

D5251M 4-20mA Input/RS-232 Output

D5252M 4-20mA Input/RS-485 Output

MODEL INPUT/OUTPUT

PROCESS CONTROL SOFTWARE

Thermocouple Inputs

Modbus RTU protocol is supported by virtually all com-

mercial process control software programs available to-

day. These programs operate on IBM and compatible per-

sonal computers in the Windows 95, 98, NT and IBM OS/2

environments.

D5311M J Thermocouple Input/RS-232 Output

D5312M J Thermocouple Input/RS-485 Output

D5321M K Thermocouple Input/RS-232 Output

D5322M K Thermocouple Input/RS-485 Output

D5331M T Thermocouple Input/RS-232 Output

D5332M T Thermocouple Input/RS-485 Output

D5341M E Thermocouple Input/RS-232 Output

D5342M E Thermocouple Input/RS-485 Output

Thermistor Inputs

D5451M 2252Ω Thermistor Input/RS-232 Output

D5452M 2252Ω Thermistor Input/RS-485 Output

D5451M [RHOPOINT]

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