The controllers feature a simple user interface, two independent control loops and are housed in a compact panel mounting enclosure. All versions can be connected to a network for monitoring and programming, using the optional RS-485 serial interface. The IR33 controllers are available with different power versions. Optional transformers are also available for powering the controllers from 110 V ac or 230 V ac.Output Type = Relay, VoltageSupply Voltage = 12 - 24 V ac, 12 - 30 V dcSize = 76.2 x 34.2mmNumber of Inputs = 2 (Analogue), 2 (Digital)Number of Outputs = 2Minimum Operating Temperature = -10°CMaximum Operating Temperature = +55°CTemperature Range = -50 - +150 (PTC) °C, -50 - +90 (NTC) °CConfigurable Outputs = Analogue, DigitalCommunication Module Available = Yes

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