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Comet PA8652 – Sensor for Digital Probes and Binary Inputs with PoE

The Comet PA8652 is the versatile low-cost Ethernet sensor for up to 4 digital temperature or humidity probes and 3 binary inputs. With PoE, 12V output for detectors and web interface – perfect for comprehensive environmental monitoring

The Comet PA8652 is the most versatile model in the PAx6xx series. It allows the connection of up to four digital temperature or combined temperature-humidity probes as well as three binary inputs for detecting states (e.g., door contact, flood detector or other two-state signals).

A special highlight is the option to power connected detectors directly with 12 V from the device – even during PoE operation. This eliminates the need for additional power supplies and significantly simplifies installation.

The binary inputs are flexibly configurable for voltage signals, dry contacts or two-wire flood detectors. The PA8652 is the ideal solution for comprehensive environmental monitoring, where binary states such as flooding, door opening or device status must be recorded in addition to temperature and humidity.

Why the Comet PA8652 is the best low-cost sensor:

  • Connection of up to 4 digital probes
  • 3 binary inputs for status monitoring
  • 12 V supply for external detectors (also with PoE)
  • Probe cable length up to 40 meters per channel
  • Power over Ethernet (IEEE 802.3af) or 15-24 V DC
  • Integrated memory and backup function
  • Modern web interface with IPv4/IPv6
  • Modbus TCP, SNMPv3 and COMET Cloud
  • Encrypted communication (HTTPS, TLS)
  • Detachable mounting bracket for easy installation

Technical data:

  • Up to 4 digital temperature or T+RH probes
  • 3 binary inputs (voltage, dry contact, flood detector)
  • Maximum probe length: 40 meters per channel
  • Power supply: PoE or 15-24 V DC
  • Operating temperature: -30 to +60 °C
  • Protection class: IP30
  • Dimensions: 116 x 85 x 42 mm
  • Weight: 180 g
  • Communication protocols: HTTP(S), Modbus TCP, SNMPv3
  • Measuring interval: 2 seconds

Scope of delivery

  • PA8652 Ethernet Sensor
  • Operating manual
  • Traceable calibration certificate
  • Free full version of COMET Vision software
  • COMET Cloud for 3 months
  • NO power supply included
  • NO probes included
Datasheets
Datasheet 1

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Datasheet 1 (125.52 KB)

Comet PA8652 - Cost-effective sensor for digital probes and binary inputs with Ethernet and PoE

General Data

  • Versatile measuring device of the PAx6xx series for temperature, humidity, and status monitoring
  • Supports digital temperature probes as well as combined temperature/humidity probes
  • 3 binary inputs for acquiring states or connecting external detectors
  • Binary inputs configurable for:
    • Voltage signals
    • Potential-free contacts
    • Two-wire water detectors
  • Power supply of external detectors with 12 V directly via the device possible
  • Supports cable lengths for sensors up to 40 m
  • Integrated backup memory
  • Modern web interface with IPv4/IPv6 support
  • Encrypted communication via HTTPS, SNMPv3, and TLS
  • Removable mounting bracket for easy installation
  • Power supply via PoE (IEEE 802.3af) or external DC voltage

Technical Data

  • Measured variables:
    • Temperature
    • Relative humidity
    • Two-state signals
  • Temperature measurement:
    • Measuring range depending on the connected DSxx probe
    • Accuracy depending on the connected DSxx probe
    • Resolution: 0.1 °C
  • Humidity measurement:
    • Measuring range depending on the connected DSxx probe
    • Accuracy depending on the connected DSxx probe
    • Resolution: 0.1 % RH
  • Measuring channels:
    • 1 × external temperature probe or
    • 1 × combined temperature/humidity probe
  • Maximum cable length per channel: 40 m
  • Measurement interval: 2 s
  • Available temperature units: °C, °F
  • Power supply:
    • Power over Ethernet (IEEE 802.3af)
    • 5 – 24 VDC
  • Dimensions: 116 × 85 × 42 mm (without connected probe)
  • Weight: approx. 180 g
  • Warranty: 3 years

Binary Inputs

  • 3 × binary inputs
  • Voltage input:
    • Low level (L): < 1.0 V
    • High level (H): > 2.5 V
    • Internal source resistance: < 2 kΩ
    • Input voltage range: 0 to +30 V
  • Potential-free contact:
    • Open-circuit voltage at the terminals: 3.3 V
    • Current through closed contact: 0.1 mA
    • Maximum contact resistance: < 5 kΩ

Communication & Network

  • Ethernet interface
  • IPv4 and IPv6 support
  • HTTP / HTTPS
  • Integrated web server (WWW)
  • HTTP GET (JSON, XML)
  • Modbus TCP
  • SNMPv1
  • SNMPv2c
  • SNMPv3
  • COMET Cloud compatible
  • Email notifications (SMTP)
  • Syslog

Environmental Conditions

  • Operating temperature: -30 °C ~ +60 °C

Protection Class

  • IP30

Scope of Delivery

  • Comet PA8652
  • Operating manual
  • Traceable calibration certificate
  • Free full version of the COMET Vision analysis software
  • COMET Cloud for 3 months
  • External sensors not included in delivery
  • Power supply unit not included in delivery
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Compatible Temperature Probes

COMET Pt1000 Stick-in Probe, -30 to +150 °C, 1 m cable, RCA connector
COMET Pt1000 Stick-in Probe, -30 to +150 °C, 1 m cable, RCA connector
COMET 2021-150/C Pt1000 Stick-in Probe, -30 to +150 °C, for bulk materials, with 1 m cable and RCA connector.
Product number: SN169C

Regular price: €141.00
COMET 2091-250/C – Pt1000 Stick-in Probe, -50 to +250 °C, RCA connector
COMET 2091-250/C – Pt1000 Stick-in Probe, -50 to +250 °C, RCA connector
COMET 2091-250/C Pt1000 Stick-in Probe 250 mm -50 to +250 °C for bulk materials and RCA connector.
Product number: SN210C-1

Regular price: From €112.00
COMET 2061-200/C Pt1000 Stick-in Probe with RCA Connector
COMET 2061-200/C Pt1000 Stick-in Probe with RCA Connector
COMET 2061-200/C Pt1000 Stick-in Probe, 200 mm, -50 to +200 °C, for bulk materials, with 1 m cable and RCA connector.
Product number: SN178C-1

Regular price: From €104.00
COMET Pt1000 Immersion Probe -190 to +150 °C for Cryogenics & Deep Freezing, RCA Connector
COMET Pt1000 Immersion Probe -190 to +150 °C for Cryogenics & Deep Freezing, RCA Connector
COMET SN239C Pt1000 Immersion Probe -190 to +150 °C with 1 m cable and RCA connector for cryogenic applications.
Product number: SN239C-1

Regular price: From €98.00
COMET Pt1000 flue gas probe -50 to +400 °C, RCA connector
COMET Pt1000 flue gas probe -50 to +400 °C, RCA connector
COMET SN270C Pt1000 flue gas probe -50 to +400 °C with 1 m Teflon cable and RCA connector.
Product number: SN270C

Regular price: €84.00
COMET Pt1000 Tube Probe with RCA Connector and 2 m Cable
COMET Pt1000 Tube Probe with RCA Connector and 2 m Cable
COMET SN170C Pt1000 Tube Probe, IP65, -30 to +130 °C, with 40 cm probe band and 2 m silicone cable.
Product number: SN170C

Regular price: €69.00
COMET explosion-proof Pt1000 immersion probe, -30 to +180 °C, RCA connector
COMET explosion-proof Pt1000 immersion probe, -30 to +180 °C, RCA connector
COMET SN263C ATEX Pt1000 immersion probe, Zone 2/22, -30 to +180 °C, with silicone cable and RCA connector.
Product number: SN263C-1

Regular price: From €60.00
Comet Pt1000TG68/C - Temperature probe with RCA connector (Pt1000)
Comet Pt1000TG68/C - Temperature probe with RCA connector (Pt1000)
Select cable length: Cable length 2 meters

Pt1000TG68/C temperature probe, RCA connector, cable options available

Product number: SN232C

Regular price: €52.00
COMET SN164C – Pt1000 Surface Probe IP65, -50 to +200 °C
COMET SN164C – Pt1000 Surface Probe IP65, -50 to +200 °C
COMET SN164C Pt1000 Surface Probe IP65, -50 to +200 °C, with brass housing and RCA connector.
Product number: SN164C-1

Regular price: From €48.00
COMET SN104C – Waterproof Pt1000 Submersible Probe IP67, -80 to +200°C
COMET SN104C – Waterproof Pt1000 Submersible Probe IP67, -80 to +200°C
COMET SN104C Pt1000 Submersible Probe IP67, -80 to +200°C with silicone cable and RCA connector, Class A.
Product number: SN104C-1

Regular price: From €35.00
COMET Pt1000 Immersion Probe CINCH -30 to +80°C
COMET Pt1000 Immersion Probe CINCH -30 to +80°C
COMET SN185C Pt1000 Immersion Probe IP67 -30 to +80°C with PVC cable and CINCH connector.
Product number: SN185C-1

Regular price: From €31.00
COMET Pt1000 Immersion Probe IP67C, -30 to +80 °C, RCA connector
COMET Pt1000 Immersion Probe IP67C, -30 to +80 °C, RCA connector
COMET SN199C Pt1000 Immersion Probe IP67, -30 to +80 °C with 1 m PVC cable and RCA connector.
Product number: SN199C-1

Regular price: From €27.00
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Compatible Temperature / Humidity Probes

COMET DSRH/C – Temperature/Humidity Probe 0 to +50 °C, RCA connector
COMET DSRH/C – Temperature/Humidity Probe 0 to +50 °C, RCA connector
COMET DSRH/C digital temperature/humidity probe 0–50 °C & 10–90 %RH with RCA connector for P-Line.
Product number: DSRH/C

Regular price: €78.00
COMET DSRH+ – Temperature/Humidity Probe 0 to +50 °C, RCA Connector
COMET DSRH+ – Temperature/Humidity Probe 0 to +50 °C, RCA Connector
Select cable length: Cable length 1 meter
COMET DSRH+ digital temperature/humidity probe 0–50 °C & 10–90 %RH with RCA connector and stainless steel filter.
Product number: DSRH01+

Regular price: €107.00
COMET DSRH+ – Temperature/Humidity Probe 0 to +50 °C, RCA Connector
COMET DSRH+ – Temperature/Humidity Probe 0 to +50 °C, RCA Connector
Select cable length: Cable length 2 meters
COMET DSRH+ digital temperature/humidity probe 0–50 °C & 10–90 %RH with RCA connector and stainless steel filter.
Product number: DSRH02+

Variants from €107.00
Regular price: €112.00
COMET DSRH+ – Temperature/Humidity Probe 0 to +50 °C, RCA Connector
COMET DSRH+ – Temperature/Humidity Probe 0 to +50 °C, RCA Connector
Select cable length: Cable length 5 meters
COMET DSRH+ digital temperature/humidity probe 0–50 °C & 10–90 %RH with RCA connector and stainless steel filter.
Product number: DSRH05+

Variants from €107.00
Regular price: €126.00
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Compatible Mounting Bracket

COMET SP104 Magnetic Mount for Web Sensors PA/TA
COMET SP104 Magnetic Mount for Web Sensors PA/TA
The COMET SP104 is a magnetic mount for Web Sensors PAxxxx and TAxxxx with neodymium magnets for easy attachment to metallic surfaces.
Product number: SP104

Regular price: €15.00
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Additional Probes

COMET JS20 – Indoor PIR Motion Detector
COMET JS20 – Indoor PIR Motion Detector
COMET JS20 indoor PIR motion detector with 12V power supply and binary output, false alarm resistant.
Product number: JS20

Regular price: €59.00
COMET LD-12 Water Detector
COMET LD-12 Water Detector
The COMET LD-12 water detector detects floods with a 3 m cable, 12 V power supply, and binary output.
Product number: LD12

Regular price: €69.00
COMET SA200A – Magnetic Contact for Doors/Windows
COMET SA200A – Magnetic Contact for Doors/Windows
COMET SA200A magnetic contact for doors/windows with a 30 mm switching distance, binary output, and terminal connection.
Product number: SA200A-1

Regular price: From €15.00
COMET SD280 (SD-283ST) – Optical Smoke Detector with Heat Sensor
COMET SD280 (SD-283ST) – Optical Smoke Detector with Heat Sensor
COMET SD280 optical smoke and heat detector with relay output, 12V/battery, LED & audible alarm.
Product number: SD280

Regular price: €79.00
COMET SP008 – 230 V Voltage Presence Sensor
COMET SP008 – 230 V Voltage Presence Sensor
COMET SP008 230 V AC voltage detector with LED, binary output, and 1.8 m cable.
Product number: SP008

Regular price: €59.00
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Power Supply

Comet A1941eu – AC/DC Adapter 230 V AC to 24 V DC / 1 A, Switching Power Supply, EU
Comet A1941eu – AC/DC Adapter 230 V AC to 24 V DC / 1 A, Switching Power Supply, EU
230 V AC to 24 V DC / 1 A, Switching Power Supply, EU
Product number: A1941eu

Regular price: €39.00

Manufacturer Information:

COMET SYSTEM, s.r.o.

Bezručova 2901

756 61 Rožnov pod Radhoštěm
Czech Republic

Phone: +420 571 653 990

Email: info@cometsystem.com

Responsible person:

Didactum® Security GmbH

Im Mühlenfeld 4

48163 Münster
Deutschland

Fon: (+49) 250 19 71 63 54 / (+49) 171 33 11 577

Email: info@didactum-security.de

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