Applications 
Mining and metals Furnaces, kilns, boilers 
Chemicals, extruders Autoclaves 
Pharmaceutical sterilisers, dryers 
Railway/ Infrastructure Burner Mgmt, 
HVAC/ data centres Combustion control 
Pulp & Paper Emergency Shutdown 
Cement and glass Pipeline monitoring 
Power Leak Prevention
Functional Overview 
– Supports split-rack redundancy 
– Supports Honeywell FDM (Field Device Manager) with HART IP 
– Supports HART function blocks (Commands 3 and 48) 
Note: HART support requires a UIO module 
– Non-redundant and redundant architectures 
– Sequence of Events Support (SOE) 
Note: Supported only in non-redundant UIO configurations.
– Redundant and Non-Redundant Safe General Purpose IOs 
– PID control with advanced Accutune III auto-tuning 
– Secure peer-to-peer communication between ControlEdge HC900 controllers 
– External watchdog timer with independent clock to detect unexpected CPU lockups 
– Adjustable recipe pool memory allocates memory for recipes, SP profiles, sequences, and schedules to meet your needs 
– Up to 4608 points can be connected via remote I/O 
– Boolean logic programming. powerful combination of over 100 algorithms
– Advanced floating-point maths functions.
– Extensive alarm and event monitoring 
– Up to 2304 galvanically isolated analogue input points 
– Up to 1008 redundant UIO points 
– New I/O voting and output verification function blocks.
– Remote I/O racks with wires for extended distances.
– Star or ring topology on the IO network using recommended switches 
– Scanners and I/O plugged in and out while powered 
– LED on/off indicators on digital I/Os 
– Graphical Function Block Configuration 
– Open 10MB or 10/100MB Ethernet interface using Modbus/TCP. Point-to-point communication via Ethernet 
– Priority email alarm/event messages
– Ramp/soak setpoint programmer 
– Setpoint scheduler with multiple outputs 
– Sequencer with 16 outputs each 
– Modbus read/write parameters can be assigned to fixed or custom addresses for HMI or monitoring software access.
– Modbus TCP Initiator 
– Gas flow function block compliant with American Gas www.cniacs.com Association specifications. (Non-safety configurations only).
– Calendar module for triggering events 
– Non-intrusive process/safety worksheets to handle both process and safety configurations.
– Built-in version control 
– Quick update – 10 ms digital update and UIO (900U02-xxxx) 100 ms analogue update 
Note: Low level AI update time is 0.5 seconds.