28 points, eight control loops, peer-to-peer DDC controller with high flexibility for user configuration to suit a wide variety of HVAC and universal applications in BACnet MS/TP networks or standalone.
The large I/O count, selection of multiple control loops, digital function blocks and analogue function blocks allow easy configuration for control of complex AHUs, multiple control loops, signal processing or conversion and – when networked – remote I/O expansion.
Predefined logic function blocks enable easy configuration of a variety of functions including Economy Changeover (temperature or enthalpy), VAV Volume, Occupancy, Hours Run monitoring, Minutes Run monitoring, Lead/Lag changeover, instantaneous Power calculation (kW, BTU) and a wide array of hysteresis & dead-band/live-band choices (Compare function).
Typical Applications
Temperature, humidity, pressure, IAQ, etc
Modulating, 3-point floating, on/off, PWM (Pulse Width Modulation), step control, DX
Signal selection, signal conversion
Pulse counting
Feature Summary
8 Digital Inputs (DI n/o or n/c, flip/flop, pulse-counting up to 10Hz)
8 Digital Outputs (DO) with power-up presetting & short-cycle timers
8 Universal Inputs (UI - user configurable analogue [AI] or digital [DI n/o or n/c], flip/flop, pulse counting to 10Hz)
4 Analogue Outputs (AO) with power up presetting
8 Virtual Digital Inputs (VDI)
8 Virtual UIs (VUI)
8 Digital Logic blocks (DL)
8 Analogue Logic blocks (AL)
8 PI Control Loop blocks (CL)
48 Network Interface Objects (NIO) for peer-to-peer connectivity
RJ11 connected room sensor options (UI1 & UI2 via screw terminals or RJ11 socket)
UIs user definable for non-standard sensors, active or passive from 1kΩ
Connected sensors may be calibrated and filtered by way of the UI configuration
Isolated, 256 node (1/8th load), RS485 network driver
Communication speeds from 2400 baud up to 76800 baud
System-wide unique device addressing
BACnet application services; Single-Read, Multiple-Read, Single-Write, Who Is, I Am, Who Has, I Have
BACnet priority array
LED indication of the On/Off status of DI and DO points for fast visual status verification
Dynamic LED indication of AO status
Sequential flashing of DI LEDs as ‘Watchdog’
Automatic communication resumption after a power loss
PC configuration by text file download using FUNCPROG or by direct parameter settings entry
Upload text file data for retrieving lost application settings, for re-use in other controllers
