Acromag DT335-0700 Manuel utilisateur

Model DT335-0700, 2/3/4-Wire RTD Input Transmitter

USB Programmable, DIN Rail Mount, DC-Powered

Dual/Single Transmitter or Signal Splitter w/

2/3/4-Wire RTD or Resistance Inputs and

Sourcing Current or Voltage Outputs

USER’S MANUAL

ACROMAG INCORPORATED Tel: (248) 295-0880

30765 South Wixom Road email: [email protected]

Wixom, MI 48393-2417 U.S.A.

Data and specifications are subject to change without notice. 8501135D

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 2 -

http://www.acromag.com

- 2 -

https://www.acromag.com

Table of Contents

GETTING STARTED ............................................................................................4

DESCRIPTION.......................................................................................................4

Key Features........................................................................................................................4

Application..........................................................................................................................4

Mechanical Dimensions .......................................................................................................5

DIN Rail Mounting & Removal..............................................................................................5

ELECTRICAL CONNECTIONS............................................................................6

Sensor Input Connections ....................................................................................................7

Output Connections.............................................................................................................9

Power Connections............................................................................................................10

Optional Bus Power Connections .......................................................................................11

Earth Ground Connections .................................................................................................12

USB Connections................................................................................................................13

CONFIGURATION SOFTWARE...................................................................... 14

Quick Overview –Android .................................................................................................14

Quick Overview –Windows ...............................................................................................15

TECHNICAL REFERENCE................................................................................ 18

OPERATION STEP-BY-STEP.......................................................................... 18

Connections.......................................................................................................................18

Configuration.....................................................................................................................19

Calibration (Optional) ........................................................................................................22

Diagnostics ........................................................................................................................24

RTD Resistance versus Temperature ..................................................................................25

BLOCK DIAGRAM ............................................................................................. 26

How It Works.....................................................................................................................26

TROUBLESHOOTING....................................................................................... 27

Diagnostics Table...............................................................................................................27

Service & Repair Assistance ...............................................................................................29

ACCESSORIES .................................................................................................... 29

Software Interface Package ...............................................................................................29

USB Isolator ......................................................................................................................29

USB A-B Cable ...................................................................................................................29

USB A-mini B Cable ...........................................................................................................30

USB OTG Cable .................................................................................................................30

DIN Bus Connector Kit........................................................................................................30

End Stops...........................................................................................................................30

SPECIFICATIONS .............................................................................................. 31

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 3 -

http://www.acromag.com

- 3 -

https://www.acromag.com

Model Number ..................................................................................................................31

Inputs (Each)......................................................................................................................31

Outputs (Each)...................................................................................................................33

USB Interface.....................................................................................................................34

Power................................................................................................................................35

Enclosure & Physical..........................................................................................................35

Environmental...................................................................................................................36

Agency Approvals ..............................................................................................................36

Reliability Prediction..........................................................................................................37

Configuration Controls.......................................................................................................37

REVISION HISTORY......................................................................................... 37

All trademarks are the property of their respective owners.

IMPORTANT SAFETY CONSIDERATIONS

You must consider the possible negative effects of power, wiring, component, sensor, or software failure in the design of

any type of control or monitoring system. This is very important where property loss or human life is involved. It is

important that you perform satisfactory overall system design and it is agreed between you and Acromag, that this is your

responsibility.

The information of this manual may change without notice. Acromag makes no warranty of any kind regarding this

material, including, but not limited to, the implied warranties of merchantability and fitness for its intended purpose.

Further, Acromag assumes no responsibility for any errors that may appear in this manual and makes no commitment

to update, or keep current, the information contained in this manual. No part of this manual may be copied or

reproduced in any form without the prior written consent of Acromag, Inc.

This manual is for DT335 dual 4-wire RTD transmitters (4-wire refers to this unit having separate isolated DC

power input) that convert RTD/resistance input signals to isolated voltage or current output signals. If your

application requires dual 2-wire RTD (loop-powered) transmitters instead, please refer to similar DT235 series

models. For current/voltage signals, refer to our other DT33x models (4-wire) and DT23x (2-wire loop

powered) models. For thermocouple input signals, please refer to our DT333 (4-wire) and DT233 (2-wire loop-

powered) models.

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 4 -

http://www.acromag.com

- 4 -

https://www.acromag.com

GETTING STARTED

DESCRIPTION

Symbols on equipment:

Means “Refer to User’s Manual

(this manual) for additional

information”.

DT335-0700 channels are modeled after ANSI/ISA Type IV transmitters. Input

channels interface with RTD sensors or resistance inputs and drive isolated DC

outputs of voltage or current. This dual channel device is unique in that it may

operate as a dual channel transmitter, a single channel transmitter, or channel 1

signal splitter. Units are setup, calibrated, and scaled using configuration software

and a USB connection to Windows-based PC’s (Windows 7 and later versions only),

or using a USB-OTG cable to Android smartphones or tablets using the Agility

mobile app. Units provide adjustable/scalable input/output ranges, plus dual signal

output drive capability for voltage or current, input/output/power isolation for each

channel, and variable input filtering.

Key Features

•Digitally configured and calibrated w/ Windows software via USB, or a wired

USB-OTG connection to Android smartphones or tablets.

•Dual Channels in a thin 17.5mm wide enclosure for high-density mounting.

•Operates as a dual transmitter, a single transmitter, or a CH1 signal splitter.

•High measurement accuracy and linearity with 16-bit I/O conversion.

•RTD input transmitter is linearized with respect to temperature (°C or °F).

•Resistance input transmitter is linearized with respect to resistance (Ω).

•Pt100, Pt200, Pt500, Pt1000, Copper, and Nickel type RTDs supported.

•25Ω, 450Ω, 2250Ω, and 4500Ω resistive ranges also supported.

•Connects to two-wire, three-wire, or four-wire RTD sensors.

•Four-wire sensor wiring eliminates error associated with lead-wire resistance,

while three-wire sensor wiring compensates for lead-wire resistance.

•Supports Celsius, Fahrenheit, and Kelvin temperature units.

•Separate short-circuit protected voltage and current output terminals at each

output supports ±10V, ±5V, 0-10V, 0-5V, or 0-20mA, 4-20mA output.

•Output channels can transmit Normal or Reverse Acting output signals.

•Up or down-scale lead-break/burnout detection.

•Both inputs and outputs are independently adjustable/scalable.

•Variable input filter adjustment (none, low, medium, high).

•Reverse-polarity protected 6-32VDC power is bus/redundant power ready.

•Wide ambient temperature operation from -40°C to +70°C.

•Thoroughly tested and hardened for harsh environments.

•CE Approved.

•FCC Conformity Class A

•cULus Listed - Class I/Division 2 - Haz. Loc., ATEX, & IECEx.

Application

For additional information on

these devices and related topics,

please visit our web site at

www.acromag.com.Also see

whitepaper 8500-917: The Basics

of Temperature Measurement

Using RTD’s.

DT300 dual transmitters are designed for high-density mounting on T-type DIN rails

and can be mounted side-by-side on 0.7-inch (17.5mm) centers and support 6-32V

DC power via terminals on the unit, or optionally via power wired to a DIN-rail bus

connector. This model interfaces with RTD or resistance elements, isolates the

input and allows it to mate with grounded or non-grounded signals, and provides an

output signal linearized to the RTD sensor temperature, or resistance. Unit drives

isolated outputs that source current or voltage from 0-20mA, 4-20mA, ±10V, ±5V, 0-

10V, and 0-5V.

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 5 -

http://www.acromag.com

- 5 -

https://www.acromag.com

Mechanical Dimensions

Units may be mounted to 35mm

“T” type DIN rail (35mm, type

EN50022), providing two isolated

I/O channels on 0.7-inch centers.

WARNING: IEC Safety Standards

may require that this device be

mounted within an approved

metal enclosure or sub-system,

particularly for applications with

exposure to voltages greater than

or equal to 75VDC or 50VAC.

DIN Rail Mounting & Removal

NOTE: It is recommended that

this unit be mounted upright on

a DIN rail allowing free air flow

intake from the bottom vent to

flow through the unit and out the

top vent. This will allow the unit

to run cooler, perform better, and

help to extend the life of the

electronics.

Refer to the following figure for attaching and removing a unit from the DIN rail. A

spring-loaded DIN clip is located on the input side bottom. The opposite rounded

edge at the bottom of the output side allows you to tilt the unit upward to lift it

from the rail while prying the spring clip back with a screwdriver. To attach the

module to T-type DIN rail, angle the top of the unit towards the rail and place the

top groove of the module over the upper lip of the DIN rail. Firmly push the unit

downward towards the rail until it snaps into place. To remove it from the DIN rail,

first separate the input terminal blocks from the bottom side of the module to

create a clearance to the DIN mounting area. You can use a screwdriver to pry the

pluggable terminals out of their sockets. Next, while holding the module in place

from above, insert a screwdriver into the lower path of the bottom of the module to

the DIN rail clip and use it as a lever to force the DIN rail spring clip down while

pulling the bottom of the module outward until it disengages from the rail. Then

simply lift it from the rail.

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 6 -

http://www.acromag.com

- 6 -

https://www.acromag.com

ELECTRICAL CONNECTIONS

WARNING –EXPLOSION HAZARD –Do not disconnect equipment unless power has

been removed or the area is known to be non-hazardous.

WARNING –EXPLOSION HAZARD –Substitution of any components may impair

suitability for Class I, Division 2.

WARNING –EXPLOSION HAZARD –The area must be known to be non-hazardous

before servicing/replacing the unit and before installing.

Wire terminals can accommodate 14–28 AWG (2.08–0.081mm2) solid or stranded

wire with a minimum temperature rating of 90oC. Channel input wiring may be

shielded or unshielded type (14-30 AWG). Ideally, output wires should be twisted

pair, or shielded twisted pair. Use insulated wire to keep channels isolated.

Terminals are pluggable and can be removed from their sockets by prying outward

from the top with a flat-head screwdriver blade. The DT335 models allows RTD

sensors to be wired to TB1 or TB3. Strip back wire insulation 0.25-inch on each lead

and insert the wire ends into the cage clamp connector of the terminal block. Use a

screwdriver to tighten the screw by turning it in a clockwise direction to secure the

wire (0.5-0.6Nm torque). Use adequate wire insulation and follow proper wiring

practices, as common mode voltages can exist on signal wiring. As a rule, output

wires are normally separated from each other and from input wiring for safety and

low noise pickup.

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 7 -

http://www.acromag.com

- 7 -

https://www.acromag.com

Sensor Input Connections

This module supports 2, 3, and 4-

wire input connections from RTD

and resistance sensors. Sensor

wires are wired directly to

transmitter input terminals at TB1

(channel 1) and TB3 (channel 2) at

the bottom of the module (the

spring-loaded DIN clip side), as

shown in the connection drawing

below. Observe proper polarity

when making input connections.

•Channel inputs are isolated from each other and from each output.

•Unit has three operating modes: You may operate this unit as a dual

transmitter, a single transmitter, or a CH1 signal splitter.

•Three-wire input connections require one wired jumper to be placed between

input (H) and input (+). This jumper routes excitation current from the input

(H) terminal to the input (+) lead of the sensor. Excitation current passes

through the sensor and produces a sensor voltage drop that is measured

differentially between the input ± leads.

•Two-wire input connections require two wired jumpers to be placed between

input (+) and input (H) and between input (-) and input (L).The second

jumper routes the excitation return current from input (-) to the A/D reference

resistance at the input (L) terminal to accomplish ratio-metric conversion of the

sensor signal. Ratio-metric refers to measuring sensor resistance as a ratio of

the reference resistance used to drive the A/D reference, rather than

measuring it using an absolute reference voltage. By using the same excitation

current to excite both the sensor and the A/D reference resistor at the same

time, any changes in excitation current will be immediately reflected in the ADC

reference, resulting in a more accurate and stable measurement.

•Four-wire input connections use no wired jumpers and eliminate errors

associated with sensor lead-wire resistance. In a 4-wire connection, the

sensor voltage is measured using a different pair of leads (input ±) than the

ones that carry the sensor excitation current (input H & L), effectively removing

lead-wire IR drop from the sensor measurement by the A/D. A 3-wire input

connection accomplishes the same thing, but only if the third-wire matches the

input ± wires in diameter, length, and material (and therefore resistance).

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 8 -

http://www.acromag.com

- 8 -

https://www.acromag.com

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 9 -

http://www.acromag.com

- 9 -

https://www.acromag.com

Output Connections

(To DC Current or Voltage

Terminals)

Outputs are short-circuit protected

from damage.

Each transmitter channel is modeled after AN ANSI/ISA Type 4 transmitter with unit

power separate from the input and output.

•Output connections are polarized. Tandem current and voltage output

terminals at each isolated channel share a common return (RTN). Current is

sourced from I Out+ and returned to RTN. Voltage is sourced positive at V Out+

with respect to RTN. Only one channel output terminal (voltage or current)

may be loaded at one time.

•Variations in load resistance have negligible effect on output accuracy when

load limits are respected with respect to output type (see below).

Observe proper polarity. Note that twisted-pair wiring is often used to connect the

longest distance between each field output and its remote load as shown above

(shielded twisted pair wiring is recommended for best results). An output

connection to earth ground at each return will help protect the isolated output

circuit from damage in noisy environments.

WARNING: For compliance to applicable safety and performance standards, the

use of twisted pair output wiring is recommended. Failure to adhere to sound

wiring and grounding practices as instructed may compromise safety,

performance, and possibly damage the unit.

TIP - Ripple & Noise: Place additional capacitance at the load to help reduce the

60Hz/120Hz ripple sometimes present in industrial applications. For large 60Hz

ripple, connect an external 1uF or larger capacitor directly across the load to reduce

excess ripple. For sensitive applications with high-speed acquisition at the load,

high frequency noise may be reduced significantly by placing a 0.1uF capacitor

directly across the load, and as close to the load as possible.

Model DT335-0700

Dual RTD/Resistance Input Transmitter w/USB

Acromag, Inc. Tel: 248-295-0880 - 10 -

http://www.acromag.com

- 10 -

https://www.acromag.com

Power Connections

The power terminals are reverse

polarity protected.

IMPORTANT –External Fuse: If this

unit is powered from a supply

capable of delivering more than 3A

to the unit, it is recommended that

potential fault current be limited

via a high surge tolerant fuse rated

for a maximum current less than 3A

(for example, see Bel Fuse MJS or

RJS fuse types).

The unit is powered from 6-32V DC (36V DC peak) by connecting power as shown

below. This transmitter can be optionally powered (or redundantly powered) via

the DIN rail bus when coupled to an optional DIN rail bus connector (Acromag

Model 1005-063) with a bus terminal block (Acromag 1005-220 or 1005-221). This

optional power connection method can allow several dual channel modules to

share a single power supply connection without wiring power to each unit’s power

terminals.

•Power connections are isolated from each input and each output. The supply

voltage should be from 6-32V DC. This voltage must never exceed 36V DC

peak, or damage to the unit may result.

•Variations in power supply voltage between the minimum required and 32V

maximum, has negligible effect on transmitter accuracy.

•Note the placement of earth ground at power. The power cable shield and DC-

should ideally be grounded closest to the module. The input and output circuit

commons are capacitively coupled to earth ground at DC- through high-

voltage isolation capacitors, offering some protection if their circuits happen

to float relative to power (not recommended).

CAUTION: Risk of Electric Shock –More than one disconnect switch may be

required to de-energize this equipment before servicing.

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