Measure, log and switch...

The Web-Thermograph Relay is a measuring device that detects temperatures and makes the values available in the network. When a limit is exceeded a digital relay output can be switched. The device includes an integrated data logger and numerous Web and network services for manual querying of the measurements, or autonomous sending of messages.

Sensor:

• Pt100 temperature sensor:
  • Measuring range of W&T probe: -50°C...180°C
  • Measuring input: -200°C...650°C

Connectivity:

• Digital semiconductor relay output
• Monitor temperatures and curves with your browser
• Alarm and reporting function:
  • E-mail for alarm or reporting functions
  • SNMP polling / alarm traps
  • Up to 8 alarm messages can be configured
• Dynamic integration into other Web sites:
  • Direct access to current measurement values via AJAX, JavaScript and Java applet
• Additional software interfaces for incorporating into your systems/databases:
  • OPC server
  • Syslog
  • Sensobase (database integration via ODBC)
  • TCP and UDP sockets, client and server
  • FTP (data logging)
• Possible applications:
  • Monitor temperatures in the server room, network cabinet or office
  • Integrated semiconductor relay turns connected devices on and off
  • Direct display of multiple measuring points in the browser via Java applet
  • Logging of measurements via FTP, Excel file, email attachment and internal memory
  • Green IT: Monitor efficiency of the server room climate control

Data logger:

• Internal data logger
  • Memory size: min. 28 weeks, max. 20 years
  • Save frequency: 15s, 30s, 1m, 5m, 15m, 60m
• Document measurement data online in the W&T Cloud and access from anywhere in the world
• Internal clock
  • Time synchronization via time server calibration
  • Battery-backed device clock

Standards & more

• Supply voltage via Power-over-Ethernet (PoE)
  • Phantom power using data pairs
  • Power over unused wire pairs
  • External power supply is an alternative
• Conforms to standards both in office and industrial environments:
  • High noise resistance per EN 61000-6-2
  • Low noise emission per EN 55032:2015 + A1 Cl. B, EN 61000-3-2 & EN 61000-3-3
• 5 year guarantee

Connections and displays:

• Temperature sensor:
  • Pt100
  • Screw terminal for Pt100/Pt1000
  • Cable length: 2m (can be extended as needed)
• Digital output:
  • Semiconductor relay
• Network:
  • 10/100BaseT autosensing
  • IPv6 on request
• Galvanic isolation:
  • Measurement inputs to network: min. 500V
• Supply voltage:
  • Power-over-Ethernet (PoE) or via screw terminal with
  • DC 18V .. 48V (+/-10%) or AC 18Veff .. 30Veff (+/-10%)
• Power consumption:
  • AVG: 80mA @24VDC, 110mA @18VAC
  • Max: 90mA @24VDC, 50mA @48VDC
  • PoE Class 1 (0.44 - 3.84W)
• Displays:
  • 1 LED Power
  • 4 LEDs Status and Error
  • 1 LED Relay Status

Measuring unit:

• Sensor:
  • Pt100/Pt1000 connection, 2-, 3- or 4-wire
• Measuring range:
  • W&T sensor: -50°C...180°C
  • PT100/PT1000 measuring input: -200°C...650°C
• Resolution:
  • 1/10°C
• Measuring error:
  •  
• Measuring unit
  • ±0.3°C, ±0.2% 
• PT100/1000 Sensor Class A
  • ±0.15°C, ±0.2% 
• Storage frequency:
  • 15, 30 sec., 1, 5, 15, 60 min
• Memory depth (6MB):
  • min. 28 weeks, max. 99 years
• Deviation of the internal clock:
  • max. 1 min. / month
• Measuring frequency:
  • 4 seconds
• 
  Semiconductor relay output
  •  
• Digital output:
  • 1 potential-free contact, semiconductor relay
• max. switching current:
  • AVG 300mA AC/DC (peak 500mA)
• max. switching voltage:
  • 39V AC/DC
• max. switching capacity:
  • 11.7W AC/DC
•  
  •  

Housing and other data:

• E-mail function:
  • Mail for sending alarms or as reporting function
• Housing:
  • Plastic compact housing, 105x75x22mm
• Weight:
  • approx. 200g
• Ambient storage temperature:
  • -40..+70°C
• Ambient operating temperature:
  • 0 .. +60°C
• Scope of delivery:
  • 1x Web-Thermograph Relay for DIN rail mounting
  • 1x Pt100 sensor

This device has been replaced by the expanded successor model 57726

Declaration of Comformity