CS240DM
CS240DM
RetiredPt-1000 Class A, Back-of-Module Temperature Sensor with Digital Modbus RS-485 Output
No longer available to order
This product is retained for service, documentation, and compatibility information.
Replaced by
- CS241DM
Pt-1000 Class A, Precision Back-of-Module Temperature Sensor with Digital Modbus RS-485 Output
- Model:
- CS240DM
- Item Number:
- 33257
- Warranty:
- 1 year
Overview
The CS240DM is a best-in-class smart sensor with a rugged, surface-mountable platinum resistive thermometer (PRT) that measures back-of-module temperature on solar photovoltaic (PV) panels. The CS240DM includes a new Campbell Scientific precision analog-to-digital, smart-sensor module that makes back-of-module temperature measurements that are among the most accurate measurements available today.
Key Advantages
Class A accuracy, best-in-class performance
Technical Description
The CS240DM consists of a Pt-1000 Class A PRT encased in an aluminum disk. The disk protects the PRT, particularly during installation when pulled through conduit, and promotes heat transfer from the surface while minimizing convective heat loss to the surroundings. An adhesive tab on the disk fastens the CS240DM to the measurement surface. If the temperature may exceed 70°C, Kapton tape is also required to secure the probe.
The precision analog-to-digital, smart-sensor module is based on the CR1000X. The module design is optimized for the Class A PRT that minimizes self-heating and lead-wire resistance. Measurement electronics are surge protected, include 1200 V isolation, and are environmentally protected with a rugged over-molding featuring an IP65 rating. Data is differentially transmitted in cabling that is well suited for industrial energy applications with excellent noise rejection and high voltage, NEC outdoor, UV, UL, and NEC ratings.
The CS240DM provides PV stakeholders with highly accurate back-of-module temperature—even at long cable lengths—for use in power-performance modeling and simulation of solar energy applications. Back-of-module temperature is critical for any evaluation of effective irradiance and power conversion.
Benefits
- Best-in-class measurement accuracy and technology
- Modbus RTU RS-485 digital serial communications
- Precision Pt1000 Class A sensing element
- Compliant with IEC 60751, DIN EN 60751
- Meets 61724-1 PV System Performance Standard
- Optional NIST traceable calibration certificate
- Purchased with any cable length
- Rugged design proven in more than 4,000 installations worldwide
Specifications
- Sensor
- Platinum resistive thermometer (PRT)
- System Uncertainty
- ±0.3°C
- Disk Material
- Anodized aluminum
- Surge Protection
- 1200 V isolation
- Supply Voltage of the Sensor
- 5 to 30 Vdc
- Power Draw
- 15 mA
- Compliance Information
- UL AWM 2586 1000V 105°C approvalCSA AWM 600V 105°C FT approval
- Conforms with Electromagnetic Compatibility Directive
- (EMC)
- Conforms with the Restriction of Hazardous Substances Directive
- (RoHS2)
- Disk Diameter
- 2.54 cm
(1.0 in.)
- Overall Probe Length
- 6.35 cm
(2.5 in.)
- Overmolded Joint Dimensions
- 5.72 x 1.12 x 1.47 cm
(2.25 x 0.44 x 0.58 in.)
- Weight
- 90.7 g with 3.2 m cable
(0.2 lb with 10.5 ft cable)
Sensing Element
- Precision
- 1000 ohm Class A platinum sensing element
(Pt-1000)
- Accuracy
- ±(0.15 + 0.002T)°C
- Temperature Coefficient of Resistance
- TCR = 3850 ppm/K
- Long-Term Stability
- Maximum Ro drift 0.04%
(after 1000 h at 400°C)
- Operating Temperature Range
- -40° to +135°C
Communications
- Protocol
- Modbus RTU protocol
(over RS-485)
- Format
- 8 data bits, 1 stop bit, even parity as default
(user-configurable)
- Baud Rate
- 19,200 bps as default
(user-configurable)
- Modbus ID
- Last two digits of serial number as default
(user-configurable)
Cable
- Description
- High-flex construction with jacket for pulling through conduitWeld spatter and oil resistant
- Jacket Material
- Black semi-gloss PVC, UL VW-1 sunlight resistant for outdoor use
- Agency Approvals
- UL AWM Style 2463NEC/CEC CMX outdoor
- Nominal Wire Diameter
- 0.61 mm
(0.024 in.)
Common Accessories
(2)42873
3M Extreme Sealing 4411N Clear Flashing Tape
Part number 35154, the 3M™ Extreme Sealing Tape 4411N, is a translucent, highly conformable, single-sided, pressure-sensitive acrylic adhesive tape with a high-performance ionomer backing. It is an ideal solution for adhering back-of-module temperature sensors to the back surface of a solar module.
Orderable39120
DIN Rail Terminal Kit with 2 Terminals and 5 Wires
The 39120 provides the needed DIN rail terminals, separator, and wires to connect any product to a data logger or other peripheral that requires five wires for connection. This kit provides the following wires: black, green, red, white, and clear. The color-coding of these wires matches the wire coloring of the product for ease in connection, maintenance, and troubleshooting.
Orderable
Other Accessories
(3)MeteoPV
Distributed Solar-Resource-Monitoring Platform
The MeteoPV Solar Resource Platform delivers key photovoltaic (PV) resource data used in PV system analysis and performance assessment. It is the only purpose-built PV resource data platform on the market, and it is ideal for distributed PV monitoring and as a plane-of-array (POA) sunstation on large solar farms.
Orderable33973
RS-485 to USB Converter
The 33973 is an RS-485 to USB converter.
Orderable21212
Black Cold Shrink Tape
The 21212 is used to seal exposed connections. The 21212 is a 10-ft roll of black self-vulcanizing tape.
Orderable
Replacement Parts
(2)33258
CS240DM Replacement Sensor Head with Quick-Connect
The 33258 is the sensor head of the CS240DM only, with quick connector. It is generally purchased as a replacement when the user needs a newly calibrated sensor head but doesn't want to replace the entire cable. The quick connector allows the user to replace the sensor head without replacing the entire cable, which could be hundreds of feet in length. The 33258 only works as a replacement for the original CS240DM that was purchased with the -Q option.
Orderable33624
CS240DM Cable with Pigtail, 150 ft (45 m)
The 33624 has a length of 45 m (150 ft). The CS240DM cable is used for differentially transmitting data and power (POE) over twisted pair to the CS240DM. The cable is a premium industrial Ethernet cable with several special attributes. Characteristic impedance is controlled for each twisted pair, making it suitable for maintaining high signal fidelity on the RS-485 signals with minimal signal reflections and excellent noise rejection. Jacket material is designed for outdoor use including UV exposure resistance and temperature performance of -40 to +75°C. Agency approvals include UL AWM Style 2463 (80C, 600V) and NEC/CEC (UL) CMX OUTDOOR. The cable has a high-flex construction with a jacket that can be pulled in conduit. It is also resistant to weld spatter and oil.
Orderable
Related Resources
Case Studies
Documents
Services Available
- Free Support
- Yes