Dataforth DSCP62 User manual

Isolated Analog Signal Conditioning Products DSCP

DSCP62 Conguration Guide

Thermocouple-to-DC Current/Voltage

Converter with Relay Output

Description

Each DSCP62 Thermocouple Converter provides a single channel of thermocouple

input which is ampliﬁed, linearized and converted to a high-level current or voltage

output. Thermocouple type, measurement range, ﬁlter, output type and range,

and fault indication may be conﬁgured by dip-switch. An auxiliary relay output

is provided to generate an alarm or act as a thermostat. Power can be applied

directly to the converter’s terminals or through a DIN rail mounted bus connector

accessory, eliminating the need to wire power to each individual converter.

Speciﬁcations Typical at TA=+25°C and +24VDC power

Installation rules

This module is designed for assembly on a DIN 46277 rail. Assembly in a

vertical position is recommended to increase the module’s ventilation. Be

sure that no raceways or other objects that compromise aeration are posi-

tioned in the vicinity, and do not position the module above equipment that

generates heat. We recommend positioning the module in the lower part of

the control panel or container compartment. We also recommend rail-type

assembly using the Power Bus connector, which eliminates the need to con-

nect the power supply to each module.

Range and precision of the input

Thermocouple Range Mean error Resolution

J –210 to 1200°C 0.025% + 0.29°C 0.12°C

K –200 to 1372°C 0.025% + 0.4°C 0.17°C

E –200 to 1000°C 0.025% + 0.2°C 0.92°C

N –200 to 1300°C 0.025% + 0.42°C 0.19°C

S –50 to 1768°C 0.025% + 1.34°C 0.66°C

R –50 to 1768°C 0.025% + 1.19°C 0.59°C

B 250 to 1820°C * 0.025% + 1.87°C 0.9°C

T –200 to 400°C 0.025% + 0.31°C 0.13°C

* Up to 250°C, the output is considered equivalent to 0°C.

Dataforth Corporation

3331 E. Hemisphere Loop • Tucson, AZ 85706 USA • Toll Free: 800-444-7644 • Tel: 520-741-1404 • Fax: 520-741-0762 • Email: [email protected] • www.dataforth.com

Module DSCP62

Input (selectable)

Thermocouple Type

EN 60584-1 J, K, E, N, S, R, B, T

Measurement range: Depends on

thermocouple type and dip-switch setting

Span: 100°C (min)

Input Impedance 10MΩ

Accuracy ±0.1% (max)

Cold Junction Error 1.5°C (max)

Thermal Drift <120ppm/°K

A/D Conversion 14-bit

Processing Floating point 32-bit

Response Time, 90% Span

(selectable) <25ms (without filter), <55ms (with filter)

CMRR >135dB, referred to power supply side

Isolation 1500Vrms (1 minute), 3-Way

Dip-Switch Configuration Sets input and output ranges, sensor type,

filter and faults

Status Indicators (LED) Internal fault, configuration error,

connection fault

Output (selectable)

Current 0 to 20, 4 to 20, 20 to 0 or 20 to 4mA

Load resistance: 500Ω (max)

Current Output Protection 25mA (max)

Fault Output 102.5% or 105% of full-scale value in

case of over-range

Voltage 0 to 5, 1 to 5, 0 to 10 or 10 to 0VDC

Load resistance: 2kΩ (min)

Auxiliary Relay Output Rated 60mA (max) at 24VAC

Power Supply 19.2 to 30VDC

Power Consumption <600mW (24mA at 24VDC)

Hot Swapping Yes

Environmental

Operating Temp. Range –20°C to +65°C

Storage Temp. Range –40°C to +85°C

Relative Humidity 0 to 90%, Noncondensing

IP Protection IP20

Emissions EN61000-6-4

Immunity EN61000-6-2

Mechanical Dimensions (w x h x d) 0.24" x 3.67" x 4.04"

(6.2mm x 93.1mm x 102.5mm)

Housing Terminal housing for mounting on

35mm DIN 46277

Connections Spring cage clamp

Weight 1.6 ounces (46g)

Auxiliary Output

The auxiliary output is designed to drive an indicator, a relay of greater

power, or the input of a supervisory control system. Through this output the

DSCP62 module can generate an alarm or be utilized like a thermostat. The

normal state of the output depends on the conﬁguration for the fault of the

primary output.

Setting the threshold

The regulation of the threshold is performed through a button located under

the front cover of the module and accessible through the hole using a small

screwdriver.

• Press and release the button. The primary output will start to represent

the value of threshold and the red LED will ﬂash slowly.

• If the button is not pressed again within 5 seconds, the system will

return to standard functioning.

• Each time the button is pressed there is an increase or decrease of the

primary output of approximately 0.2%; the direction of the variation

depends on the conﬁguration of the output.

• If the button is not released but continues to be pressed, a continuous

3% increase starts after 2 seconds.

• When the maximum/minimum value of the chosen scale is reached, the

cycle starts again.

• During regulation of the threshold, the auxiliary output follows standard

functioning, opening and closing as previously set.

• After 5 seconds of no button pressing, the set value is memorized and

the module continues with standard functioning.

SW2.7 Regulation type Fault Standard state Set threshold

OFF Furnace * Upscale Closed (LED ON) Decrease

ON Refrigerator * Downscale Open (LED OFF) Increase

* In case of choice of direct output: 0(4) to 20mA, 0(1) to 5(10)V

Dip-switch SW2.7 details

Inserting module in DIN rail Extracting module from DIN rail

1. Attach module in upper part of rail.

2. Press module downward.

1. Apply leverage using a screwdriver

(as shown in ﬁgure).

2. Rotate module upward.

NOTE:

The Power-Bus must be inserted with protruding terminals on the left (as

shown in ﬁgure above); otherwise the modules are turned upside down.

Using the Power-Bus connector

Each expandable Power-Bus connector allows insertion of two modules.

Insert Power-Bus connectors into the DIN rail by attaching to upper side of

rail and rotating downward.

Factory dip-switch settings

The module leaves the factory with all dip-switches in the OFF position.

The default conﬁguration is as follows:

Never connect power supply directly to the bus connector on

the DIN rail. Never tap power from the bus connector either

directly or by using module terminals.

Thermocouple type J

50/60Hz line rejection 50Hz

Input filter Not enabled

Measurement range 0 to 1200°C

Output signal 4 to 20mA

Output signal in case of open input Toward the top of the output range

Input over-range Output signal is limited to +5% of max

(or –5% of min) with input over-ranged

Auxiliary output threshold 0% of the nominal scale

This conﬁguration is valid only with all dip-switches in the OFF position. If

even one dip-switch is not in the OFF position, all parameters must be set

as indicated in the following tables.

Input ﬁlter

SW1 5 10-90% response, 50Hz 10-90% response, 60Hz

Enabled <55ms <55ms

Not enabled <25ms <25ms

Measurement range start

SW1 6 7 8 J type K type R type S type T type B type E type N type

Default * 0°C 0°C 0°C 0°C 0°C 0°C 0°C

0°C 100°C 100°C 100°C 50°C 400°C 100°C 100°C

100°C 200°C 200°C 200°C 100°C 500°C 200°C 200°C

200°C 400°C 300°C 300°C 200°C 600°C 300°C 300°C

300°C 600°C 400°C 400°C –50°C 800°C 400°C 500°C

500°C 800°C 600°C 600°C –150°C 1000°C 500°C 700°C

–100°C –100°C 800°C 800°C –100°C 1200°C –100°C –100°C

–200°C –200°C 1000°C 1000°C –200°C 1400°C –200°C –200°C

* If all the dip-switches are in the OFF position, the default conﬁguration is valid; otherwise the value

of this parameter is 0°C, as for the other thermocouple types.

Measurement range end

SW2 1 2 3 J type K type R type S type T type B type E type N type

1200°C 1350°C 1750°C 1750°C 400°C 1800°C 1000°C 1300°C

1000°C 1200°C 1500°C 1500°C 350°C 1600°C 800°C 1200°C

800°C 1000°C 1300°C 1300°C 300°C 1500°C 600°C 1000°C

600°C 800°C 1100°C 1100°C 250°C 1300°C 500°C 800°C

500°C 700°C 900°C 900°C 200°C 1100°C 400°C 600°C

400°C 500°C 700°C 700°C 150°C 900°C 300°C 500°C

300°C 300°C 500°C 500°C 100°C 700°C 200°C 400°C

200°C 200°C 300°C 300°C 50°C 500°C 100°C 200°C

Thermocouple type

SW1 1 2 3

NOTE:

The indication means the dip-switch is set in the ON position.

No indication means the dip-switch is set in the OFF position.

50/60Hz line rejection

SW1 4

60Hz

50Hz

Output signal

SW2 4 5 6

4 to 20mA

0 to 20mA

20 to 4mA

20 to 0mA

0 to 10V

1 to 5V

10 to 0V

0 to 5V

Output signal in case of open input

SW2 7

ON: Toward the bottom of the output range

OFF: Toward the top of the output range

Over-range / Under-range Options

(See table below for corresponding values)

SW2 8

ON: Output signal is limited to ±2.5% of full-scale setting with input over- / under-ranged

OFF: Output signal is limited to ±5% of full-scale setting with input over- / under-ranged

Nominal output value

Over- / Under-range limited to

±2.5% of full-scale setting

Over- / Under-range limited to

±5% of full-scale setting

20mA 20.5mA 21mA

4mA 3.5mA 3mA

0mA 0mA 0mA

10VDC 10.25VDC 10.5VDC

5VDC 5.125VDC 5.25VDC

1VDC 0.875VDC 0.75VDC

0VDC 0VDC 0VDC

Dataforth Corporation

3331 E. Hemisphere Loop • Tucson, AZ 85706 USA • Toll Free: 800-444-7644 • Tel: 520-741-1404 • Fax: 520-741-0762 • Email: [email protected] • www.dataforth.com

LED indications on front of module

Red LED Meaning Output fault

Fast flashing

Internal fault: power supply not

sufficient, out of range offset or

reference. Error on reading or

writing in flash (at the start or on

threshold setting).

Yes

Slow flashing Dip-switch setting error Yes

Set threshold in progress No *

Steady light

Disconnected thermocouple, out

of range input or temperature

compensation

Yes

Output limiting in progress No

* In this modality the output signal represents the value of the threshold.

Yellow LED Meaning

ON The auxiliary output is closed

OFF The auxiliary output is open

0.2 to 2.5mm2

8mm

Electrical connections

The module is designed for spring cage clamp

electrical connections.

1. Strip cables by 0.8mm.

2. Insert screwdriver in the square hole and press

until the cable lock spring opens.

3. Insert cable in the round hole.

4. Remove screwdriver and ensure cable is tightly

fastened in the terminal.

Power supply

There are three ways to power the DSCP6x series of signal converters.

1. Connect the 24VDC power supply directly to terminals 7 (+) and 8 (-)

of each module.

2. Connect power to one signal converter and use the expandable Power-

Bus connector to distribute power to a maximum of 16 adjacent modules.

The bus can be supplied from any of the modules, but the total current

consumption of the bus must be less than 400mA. Higher consumption

values can damage the module. An appropriately sized fuse must be

connected in series with the power supply.

3. Use the DSCP70 Power Supply Connection Module and the expandable

Power-Bus connector to distribute power to a maximum of 75 modules.

The DSCP70 is designed to protect the modules connected via bus against

overvoltage loads. The bus connector can be provided with power using the

DSCP70 module if the total consumption of the bus is less than 1.5A. Higher

consumption values can damage both the module and the bus. An appropri-

ately sized fuse must be connected in series with the power supply.

19.2 to 30VDC

Power

supply

Set threshold Red LED

Yellow LED

Input

The module accepts input from the following types of thermocouples:

J, K, R, S, T, B, E, N.

The use of shielded cables is recommended for the electronic connections

Output

Input

Power

supply

Output: Voltage / Current connections

The use of shielded cables is recommended for the electronic connections.

Output

Input

Power

supply

V / I

Output

Input

Power

supply

AUX

Output

Input

Power

supply

V / I

Output

Input

Power

supply

AUX

Auxiliary output

The auxiliary output is designed to drive an indicator, a relay of greater

power, or the input of a supervisory control system.

Dataforth Corporation

3331 E. Hemisphere Loop • Tucson, AZ 85706 USA • Toll Free: 800-444-7644 • Tel: 520-741-1404 • Fax: 520-741-0762 • Email: [email protected] • www.dataforth.com