Web-IO universal limit value relay with Ethernet interface, built-in web server and 8 inputs for temperature sensors or other analog signals. The UR840IP can be connected to the internet or an intranet and operated via TCP/IP from a normal PC with a suitable browser.
The device can simultaneously evaluate and monitor up to 8 different input signals. Each of the 4 output relays can be assigned up to 8 limit values, one per input. If a limit value is reached, an alarm is triggered and a relay switches. Example: Alarm 1 is activated when a temperature is exceeded at sensor input 3 (e.g. Pt 100) or the signal from a pressure transmitter (e.g. 4-20 mA) at input 5 falls below a limit value. The device also has an RS485 interface (Modbus RTU) and analogue outputs 0/2-10 V or 0/4-20 mA.

Accessory: Installation frame ER8 for panel mount

Applications

The TR800Web is used where one or more of the following features a required:

• The UR840IP is used to advantage wherever the following features are required
• monitor up to 8 different analogue measured values and transfer them to the Internet
• Measured value query and remote maintenance via intranet/internet

8 Measuring inputs (every input individually programmable)

• Pt 100 (RTD), Pt 1000 in 2- or 3-wire connection
• PTC-sensors (thermistors)
• Thermocouples type B, E, J, K, L, N, R, S, T
• DC 0-10 V, DC 0/4-20 mA
• Resistance 500 Ohm, resistance 30 kOhm
• Virtual sensors: linking of measured values (difference, MIN/MAX)
• 4 digital inputs with programmable functions

4 Alarms/Output Relays

• 4 relays, potential-free change-over contacts
• Remote switching command for relays via Ethernet
• individually programmable for each alarm:
  • one limit value per measurement input/virtual sensor (switching and reset value)
  • switching and switch-back delay
  • Remote control of the relays (on/off) via browser
  • 2 out of x, alarm only if limit value is reached in 2 sensors

Interfaces:

• Ethernet interface (http and modbus)
  • Modbus TCP protocol for reading data (port adjustable)
  • RS485 interface for reading data with Modbus (RTU)
  • 2 analogue outputs 0/2-10 V / 0/4-20 mA, configurable (optionally instead of RS485)

Connected to internet via web-browser

• Measured values, min/max values with date/time stamp
• Simulation of measured values
• status of the alarms
• Configuration of the inputs (name, type, compensation, scaling and unit)
• Configuration of alarms (limit values, relay function, ...)
• Data logging of measured values for each input, with time stamp
• Logging interval adjustable from 10 seconds to 30 minutes.
• alarm logging
• network configuration and system settings
• User management and password protection
• Real-time clock with time server synchronization, power reserve 7 days

Displays and controls

• LCD display and joystick for querying measured values and operation