Impulse DSCP20 - Manual

Configurable Transmitters DSCP
For information call 800-444-7644 178
DSCP20
Programmable 2-Wire Temperature Transmitter, DIN Mount
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Features
• Low-Cost Non-Isolated 4-20mA Transmitter
• No Power Supply Required, Powered
from Output Loop Current
• Interfaces to All Standard Thermocouples
and RTDs
• Software Configurable Input Type and Range
• Open and Short-Circuit Input Detection
• Configurable with or without Output Loop
Power Connected
• Mounts on Standard DIN Rail
• -25°C to +80°C Operating Temperature
• CE Compliant
Figure 1: DSCP20 Block Diagram
Description
Each DSCP20 2-wire transmitter is designed for measuring temperature using
thermocouples or RTDs. The input type, measurement range, and other
features are software configurable. A PC, the DSCX-887 and DSCX-416
interface cables, and the DSCX-895 configuration software are required to
configure the transmitter. Communication is serial RS-232C.
The DSCP20 can interface to 12 industry standard thermocouple types: J, K,
T, E, R, S, B, N, L, U, C, and D. Cold junction compensation is selectable as
either internal or external. Three RTD types, Pt 100, Ni 100, and Cu 50* can
be interfaced in a two, three or four wire connection. All inputs are linearized
using up to 23 points of interpolation, and total errors are less than ±0.2%.
Other configurable features include: zero point and input range adjustment,
output response for open or short-circuit sensor or cable failure, normal or
inverted output, ripple suppression for 50Hz or 60Hz, and output time response.
The DSCX-895 configuration software allows query, print-out and saving of
configuration settings, display of input measurement value, and display of
interpolation table points.
*Call factory for Cu RTD information.
Thermocouple Type and Material
B Pt30Rh-Pt6Rh
E NiCr-CuNi
J Fe-CuNi
K NiCr-Ni
L Fe-CuNi
N NiCrSi-NiSi
R Pt13Rh-Pt
S Pt10Rh-Pt
T Cu-CuNi
U Cu-CuNi
C W5 Re/W26 Re
D W3 Re/W25 Re
Type Material
(see Electrical
Connections
on page 182 for
connection details)