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PWC Preferred Instruments a division of Preferred Utilities Mfg. Corp. Plant Wide Controller (PWC) Overview
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PWC The Plant Wide Controller TM (PWC) is a state-of- the-art boiler sequencing, control and monitoring system. The PWC combines innovative ease of operation, communication and expansion capabilities with boiler application expertise. Off-the-shelf, standard modulating Lead-Lag applications can be expanded to control circulating water variable speed pumps and isolation valves while monitoring the flame safeguard and boiler control systems. Plant Wide Controller
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PWC Easy to Operate Key lockable Door Security
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PWC Easy to Operate q Hardwired Control Switches & Indications: Boiler On-Off-Auto Status Indications Firing Rate Control Dial Firing Rate Auto / Man 0 - 100 % Bargraph
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PWC Easy to Operate q Easy to use displays for: n Boiler Plant Control & Monitoring n Historical Trending n Alarm & Event Handling n Boiler Plant Setup LCD Graphic Display and Keypad
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PWC q Home Page - n Boiler Overview Display q Arrow Keys - n Move Cursor q Menu, Page Up, Down - n Display Selection q Alarm List - n Alarm, Event Display q Alarm Silence PB Easy to Operate Display Keys
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PWC Home Page q Lead / Lag Control q Start Qty Control q Sequence Control n Custom n Lead Rotate q Alarm Status n Time / Date Stamped q Header Status n Pressure / Temperature n Setpoint n Outside Temperature q Status n Started Boilers n Warming Boilers n Modulating Boilers n Tripped Boilers
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PWC Alarm & Event Summary q Up to 200 Alarms & Events q First in - First out q Operator Actions q Events q Alarms q Time & Date Stamped
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PWC Historical Trending q An Essential Monitoring Tool q Multiple(4) Pen “Charts” q 8 min, 40 min., and 2, 8, & 24 hour charts q 8 channel, 2 Hr Historical Memory - Standard q 32 Mb Historical Memory - Optional n 32 ch AI + 32 ch DI every 15 seconds for 30 days n 90 or more days for less channels with low activity (depends on data compression efficiency)
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PWC Easy Setup q Fill In The Blanks n Boiler Sequence n PID Tuning n Outdoor Reset Setup n Day / Night Setback n Day / Week Setback n Week / Year Setback
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PWC Outdoor Reset / Setback Temp. q Easily Configured: n Normal Setpoints n Setback Setpoints n High & Low Limits n Outdoor Cutoff q Automatic Graphical Representation
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PWC EXPANDABLE PWC Front Door Open (2 to 5 boiler lead / lag configuration shown with three spare slots)
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PWC CPU Board q (2) Analog Inputs (4-20 mAdc /Thermistor) q (1) Relay Output (SPDT, 8A) q (1) RS232 programming Port q (1) Isolated RS485 Port n (Modbus or Bacnet Option) q (1) Telephone Modem Option Card n Dial in or dial out, 33.6 kb, RJ-11 jack, Data and Pagers q (1) Printer Port (Alarms / Logs)
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PWC Discrete Input q (15) Inputs, 120 Vac, optically isolated q (5) groups of isolated neutrals q (15) LED status indications q (2) 2A / 120 Vac Fuses
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PWC Hand-Off-Auto Relay Output q (5) Relay Outputs n (8A inductive, 1/2 Hp, 120 Vac) q (5) Hand-Off-Auto Toggle Switches n Toggle Switch is directly wired into output circuit. q (5) LED's for Output ON / OFF q (5) LED's for ”Call for Operation” q (2) 2A / 120 Vac Fuses
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PWC Auto/Manual Analog Output q (5) Modulating Analog Outputs q (5) Auto-Manual Toggle Switches n "Manual" hardware overrides CPU n Bumpless Manual to Auto Transfer q (5) 0-100% Output Control Knobs q (5) 0-100% Output Bargraphs q Requires (1) Output Card per active channel, Any combination of 4-20 mA and 135 ohm cards
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PWC Analog Input q (8) UNIVERSAL Inputs n Switch Selectable as: »2 wire 4-20 mA, with internal 24 Vdc »Thermistor, -60F - 300 F »Thermocouple, Type J, 0 - 1200 F, 0-5 Vdc, potentiometers and other signals »Pulse, 0.6 ppm - 4000 Hz, 0-15 Vdc pulsers for Oil, Gas, Water, & kWh meters »Enables Fuel Budget Fuel Consumption Tracking q (8) LED status indications n Power Ouputs and Signal Inputs are short circuit protected
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PWC Relay Output q (8) Isolated Relay Outputs n ( 8A inductive, ½ Hp, 120 Vac) n (2) SPDT, (6) NO-SPST q (8) LED status indications q (2) 2A / 120 Vac Fuses
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PWC Communications To Customer’s Building Automation Systems (Modbus / Bacnet) Pagers Diesels Chillers etc. Boilers (Modbus / Bacnet)
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PWC Advanced Communication Capability q Communications n Modbus communication to BAS or SCADA n Dial In From PC n Dial Out to Alpha Numeric Pager
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PWC Dial In From PC
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PWC Availability q Hard Service Manual n Every Boiler Start / Stop Command & Firing Rate can be set manually in the unlikely event of a CPU hardware failure or software corruption n A CPU failure will not prevent central manual control of the boiler plant n This is a UNIQUE FEATURE! q Fault Monitoring n Analog Inputs (thermisters, 4-20mA signals) are monitored & LED used to show fault status
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PWC Installation 3/4” conduit connections Screwed fast Cable Tie Downs Power Fuses Spare Terminals (typical) Physical Separation Between Operation and Wiring
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PWC Custom Blockware
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PWC Custom Displays
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PWC Custom Charts
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PWC Preferred Instruments 31-35 South Street Danbury CT T: (203) 743-6741 F: (203) 798-7313 www.preferred-mfg.com
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