Non Isolated Loop Powered DIN Rail RTD Input Conditioner
RTD Input Non-Isolated DIN Rail Loop-Powered Signal Conditioner
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- 2, 3 or 4-Wire Pt100 RTD Input
- Powered By the Host (Output) Current Signal Loop
- High Accuracy Better Than 0.2°C or 0.1% of Selected Range
- Slimline 6 mm (0.24") Housing
- Excellent EMC Performance and 50/60 Hz Noise Suppression
- Fast Response Time < 30 ms/300 ms (Selectable)
- Pre-Calibrated Temperature Ranges Selectable via DIP-Switches
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Input Type
Input Class
Input Ranges
Output Type
Output Class
Supply Voltage Type
Isolation
Programability
Product Specs
The DRSL-RTD-LP RTD input non-isolated DIN rail loop-powered signal conditioner measures a standard 2-, 3- or 4-wire Pt100 temperature sensor and provides a passive analog current output signal. The DRSL-RTD-LP provides a competitive choice in terms of both price and technology for interfacing RTD signals to SCADA systems or PLC equipment. This unit is powered by the host (output) current signal loop. Low power consumption facilitates DIN rail mounting without the need for any air gap. Easy configuration of more than 1000 factory calibrated measurement ranges is done via DIP-switches. The unit operates over a wide temperature range from -25 to 70°C (-13 to 158°F).
SPECIFICATIONS
INPUT
Input Type: 2, 3, or 4-wire Pt100 RTD
Temperature Range: -200 to 850°C (-328 to 1562°F)
Sensor Current, RTD: <150 µA
Sensor Cable Specifications: 50Ω per wire or 50 nF
Effect of Sensor Cable Resistance (3 or 4-Wire RTD): <0.002Ω/Ω
Broken Sensor Detection: >800Ω
Shorted Sensor Detection: <18Ω
OUTPUT
Current Output
Programmable Signal Ranges: 0 to 20 mA and 4 to 20 mA
Range Limits (NAMUR NE43 Out of Range): Below 3.8 mA or above 20.5 mA
Sensor Error Detection (Dip Switch Selectable for Enable or None): Below 3.5 mA or above 23 mA
Incorrect DIP-Switch Setting Identification: Below 3.5 mA or above 23 mA
Output Error Level: DIP switch selectable for upscale or downscale
Load Resistance (Ω): ≤(Vsupply -3.3)/ 0.023
Load Stability: ≤0.01% of span/100Ω
GENERAL
Supply Voltage: 3.3 to 35 Vdc
Voltage Drop: 3.3 Vdc
Power Consumption: 1 W max
Internal Consumption: 0.65 W max
Signal/Noise Ratio: >60 dB
Response Time (0 to 90%, 100 to 10%): <30 ms/300 ms (selectable, provides either fast response or signal dampening as needed).
Accuracy: Better than 0.2°C or ±0.1% of selected range
Temperature Coefficient: ≤±0.02°C/°C
EMC Immunity Influence: <±0.5% of span
Extended EMC Immunity
NAMUR NE 21, A Criterion, Burst: <±1% of span (span = selected input range)
ENVIRONMENTAL
Operating Temperature: -25 to 70°C (-13 to 158°F)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Calibration Temperature: 20 to 28°C (68 to 82°F)
Relative Humidity: 0 to 95% RH non-condensing
Protection Degree: IP20
Installation Area: Pollution degree 2 and measurement/overvoltage category II
MECHANICAL
Dimensions: 113 H x 6.1 W x 115 mm D (4.4 x 0.24 x 4.5")
Weight: 70 g (0.15 lb) approx
DIN Rail Type: DIN EN 60715 - 35 mm
Wire Size: 0.13 x 2.5 mm²/AWG 26 to 12 stranded wire
Screw Terminal Torque: 0.5 Nm
SPECIFICATIONS
INPUT
Input Type: 2, 3, or 4-wire Pt100 RTD
Temperature Range: -200 to 850°C (-328 to 1562°F)
Sensor Current, RTD: <150 µA
Sensor Cable Specifications: 50Ω per wire or 50 nF
Effect of Sensor Cable Resistance (3 or 4-Wire RTD): <0.002Ω/Ω
Broken Sensor Detection: >800Ω
Shorted Sensor Detection: <18Ω
OUTPUT
Current Output
Programmable Signal Ranges: 0 to 20 mA and 4 to 20 mA
Range Limits (NAMUR NE43 Out of Range): Below 3.8 mA or above 20.5 mA
Sensor Error Detection (Dip Switch Selectable for Enable or None): Below 3.5 mA or above 23 mA
Incorrect DIP-Switch Setting Identification: Below 3.5 mA or above 23 mA
Output Error Level: DIP switch selectable for upscale or downscale
Load Resistance (Ω): ≤(Vsupply -3.3)/ 0.023
Load Stability: ≤0.01% of span/100Ω
GENERAL
Supply Voltage: 3.3 to 35 Vdc
Voltage Drop: 3.3 Vdc
Power Consumption: 1 W max
Internal Consumption: 0.65 W max
Signal/Noise Ratio: >60 dB
Response Time (0 to 90%, 100 to 10%): <30 ms/300 ms (selectable, provides either fast response or signal dampening as needed).
Accuracy: Better than 0.2°C or ±0.1% of selected range
Temperature Coefficient: ≤±0.02°C/°C
EMC Immunity Influence: <±0.5% of span
Extended EMC Immunity
NAMUR NE 21, A Criterion, Burst: <±1% of span (span = selected input range)
ENVIRONMENTAL
Operating Temperature: -25 to 70°C (-13 to 158°F)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Calibration Temperature: 20 to 28°C (68 to 82°F)
Relative Humidity: 0 to 95% RH non-condensing
Protection Degree: IP20
Installation Area: Pollution degree 2 and measurement/overvoltage category II
MECHANICAL
Dimensions: 113 H x 6.1 W x 115 mm D (4.4 x 0.24 x 4.5")
Weight: 70 g (0.15 lb) approx
DIN Rail Type: DIN EN 60715 - 35 mm
Wire Size: 0.13 x 2.5 mm²/AWG 26 to 12 stranded wire
Screw Terminal Torque: 0.5 Nm
Rated 5 out of
5
by
gregtsy from
great product
simple to install, precise conversion.
recomendation: add TC type T
Date published: 2016-07-25
I am using a 120 ohm resistor as a test input and getting 3.5mA output. PT100 resistance range is 100 to 138 ohms for 0 to 100C. Switch settings I have for DIP 1, 1 to 10 are off, on, off, on, off, off, on, off, on, on. Appreciate your help.
Thank you for your inquiry. That switch configuration tells us it is set up for 3 wire RTD and 4-20mA output. 138 ohms simulate 97 degrees C. Assuming all the wiring was done properly, 3.5mA out could still be correct depending on the settings you have for temperature range. Please contact our Data Acquisition group for more details on your specific case at das@omega.com.
Date published: 2020-02-19
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