The DPC panels which contain stand alone controllers for the variable volume room pressure control and the constant volume fresh air valve controls. Again, all DPC panels are mass produced and pre-drilled and cut and then painted. The doors have always cut outs for the DPM pressure or volume transmitters which are tubed to the bulk head nipples located on the top of the panel. An isolator and circuit breakers for 230V are fitted as standard and all individual DPC controller circuits are fused so that in case one controller fails, the others shall carry on working. All analogue and digital in and outputs are wired to terminals and can be disconnected from the field equipment via the spade swirches built into the terminal. All DPC controllers are connected via Modbus rtu to the PLC for easy communications.
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