Back-of-Module Temperature Sensor
The BOM-TS-485 is a PT1000 back-of-module temperature sensor that measures the rear-surface temperature of photovoltaic panels and reports it over RS-485 Modbus RTU, giving insight into panel performance across installations from small rooftop systems to utility-scale solar farms.
- Range
- -20 to +80°C
- Ingress
- IP65
- Supply
- 12-34 V AC/DC
Overview
In detail
How it works
A PT1000 1/3 Class B sensor (to EN 60751), built for flat surfaces, is mounted to the back of a solar panel and measures its surface temperature. Because PV panel efficiency is temperature-dependent, this reading feeds a fuller picture of panel performance.
The sensor housing is plastic with an aluminium mounting plate (12 x 50 x 50 mm), with overall sensor dimensions of 44 x 69 x 75 mm (H x W x L) and IP65 ingress protection. It connects via a 3 m or 5 m UV- and weather-resistant PUR cable.
Connectivity
Data is transmitted over a 2-wire RS-485 bus using the Modbus RTU protocol. Supported baud rates are 1200, 2400, 9600, 19200 and 38400, with none/even/odd parity and 1 or 2 stop bits (2 only at no parity). The factory default is 9600 baud, 8N1, at address 1.
Wiring is brown (power +), white (power -), green (RS-485 data + / A) and yellow (RS-485 data - / B).
Deployment
Suited to all sizes of PV solar installations, from small rooftop systems to utility-scale solar farms.
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Specifications
Technical specifications
- Sensor type
- PT1000 1/3 Class B (EN 60751), for flat surfaces
- Range
- -20 to +80°C
- Accuracy
- ±0.1°C
- Supply voltage
- 12-34 V AC/DC
- Ingress
- IP65
- Housing
- Plastic housing with aluminium plate, 12 x 50 x 50 mm
- Dimensions
- 44 x 69 x 75 mm (H x W x L)
- Cable
- 3 m or 5 m PUR cable, UV and weather-resistant
- Protocol
- RS-485 Modbus RTU, 2-wire bus
- Communication rate
- 1200, 2400, 9600, 19200 or 38400 bps (default 9600)
- Parity
- None, even or odd
Related
Often specified alongside
Geosystems
FOT Embeddable Temperature Sensor
- Range
- −40 to +85°C (cable dependent)
- Accuracy/Repeatability
- ±1°C
- Resolution
- 0.1°C
Geosystems
TH Series Temperature Sensor
- Range (TH-T)
- -50 to +150 °C
Ready to specify?
Add Back-of-Module Temperature Sensor to your enquiry
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