Isolated Analog Signal Conditioning Products
DSCP
DSCP62 Configuration 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 T
A
=+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
SD1145 02/11
©
2011 Dataforth Corporation, All Rights Reserved ISO9001:2008 Registered QMS
1
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
