NexSys - Boiler Control System

All features, parameters, settings, and functional requirements to operate, program, and monitor the NexSys™ control system are accessible from the touch screen and DO NOT require the use of an external input, PC or device to operate or access. The NexSys™ control system even includes On-Board Help Screens with wiring, programming, and maintenance instructions.

The NexSys™ control system comes standard with the following system interfaces and DMX outputs: LON EIA 709 FTT10, BACnet IP, and MODbus TCP. The unit comes from the factory ready to integrate readings into a BAS, including: The state of any installed relay (On/Off), Water meter readings, Conductivity readings, Additional sensor readings (ph, ORP), sensor alarms, Additional 4-20mA input readings, Flow condition, and other digital inputs.

The NexSys™ control system comes standard with Ethernet capability through a browser (HTML5) interface that allows 100% access to all features and control parameters of the controller.

• Interface: Touch Screen display, 5.7” diagonal viewing area.
• Display Size: 115×86 mm
• Pixel: 320×240
• Color: TFT 65536
• Backlight: LED or CCFL
• Memory: 16 MB Flash, 16 MB RAM
• Multiple levels of security
• Screen is accessed by opening the NEMA 4X enclosure front panel.

Six relays rated at 120VAC.  Relay ratings, 3 AMP per relay, 15 amps total

Chemical feed and additional relay programming methods, available selections

• Feed by percent of blowdown time after blowdown
• By Setpoint with Percent of time feature as part of spaced feed for setpoint “creep”.
• Trace chemistry capable with user definable correction factors as part of programming.
• By makeup totalized gallons
• By blowdown totalized gallons
• Percent on time
• Scheduled feed by time and day
• Alarm relay-User selected alarms powered output can act as individual High or low alarm for a specific sensor input.

Inputs:

Up to 8 active Sensor inputs (2 TWR Conductivity, 2 pH and 2 ORP, 2 MU Conductivity) can be ordered in various combinations.

Water meters- Two Water meter inputs are standard and be factory or field upgradeable for two additional (Total four) water meter inputs

Each relay shall be capable of being configured to operate with either  of the two flow (digital) input for activation or deactivation

Expansion capabilities: The unit will be factory or field upgraded. Additional expansion features include:

• 4 Additional Fully programmable relays ( NRLY Nodes)
• 8 Sensor inputs. Combo of Conductivity using NCON and pH or ORP Probes using NpH/ORP Nodes. Requires the purchase of additional probes/Plumbing kits.
• 8 Additional 4-20MA inputs (2 N420I Nodes)
• 4 Additional Digital Inputs (NDIG Node)

Interface/Communications:

The NexSys® comes standard with the following system interfaces :  LON EIA 709 FTT10, BACnet IP (Read this link before ordering) and MODbus TCP (As well as Incorporate DMX outputs). The unit shall comes from the factory with all tables and outputs defined for  Information being transmitted , including:

• The state of any installed relay (On/Off)
• Water meter readings
• Conductivity reading
• Any additional sensor reading (ph, ORP)
• Any sensor alarms
• Any Additional 4-20mA input readings
• Any Additional 4-20 mA output reading
• Flow condition (and any other digital inputs)