The IQ251 is a large capacity controller designed for the control of all types of building plant. It can provide up to 128 I/O points by connecting 8 I/O modules in any combination. IQ system accessory modules may be connected to the input/output channels to provide greater I/O flexibility. They enable the IQ251 to provide sufficient capability for more complex strategies. It can operate either as a stand alone device or as part of a Building Management System.
Order example: IQ251/comms/voltage e.g. IQ251/TMNH/UK/230. I/O cards must be ordered separately
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