Unitary Controller

ENERNET Corporation’s General Purpose Control is a compact, multi-channel signal acquisition, processor and switch module housed in a molded plastic enclosure. Ideal in compressor control applications, it contains a Cypress Neuron making it LonWorks® capable; operating firmware evaluates a number of analog and status input signals and implements a series of Form A contact closures as outputs. The module has two isolated, line-voltage status inputs (ON/OFF) to detect switched sensors. Five other low voltage (0-5V) analog inputs can accept most process sensors; strain gauge, pressure, temperature, 4-20 mA current loop (et al.). Analog resolution is 10 bits or, optionally, 12 bits. Sensors can be powered with on-board 5 volt supply.

Two banks of solid state relays are capable of a combined load of 5 amperes maximum at 120 or 240 VAC. The bank feature permits simple connection of safety (or  other) switches in series with a controlled load (e.g. temperature or pressure safety switch). Each relay has an associated status lamp. The module is compatible with FT-10 LonWorks® networks.


  • UL: 984 Compressor Standard and 873 Electrical Component for HVACRRecognized
  • 120 / 240 vac operation
  • Optically isolated direct line voltage status interface
  • Optically isolated line voltage control output
  • Safety limit input sources power to outputs
  • A safety failure forces outputs (except alarm) to fail-safe off condition
  • Alarm output voltage independent of control output voltage source
  • Custom Firmware
  • FT10 topology
  • +5 volt DC sensor excitation





Housing: ABS plastic injection molded shell Size: 6.8″ x 5.2″ x 1.5″




Operating Power:

Voltage: 115 / 230 VAC @ 60 Hz
Voltage Range: ±15% of nominal
Power: 2 Watts nominal, 4 Watts Max.


Analog Inputs:
Channel Capacity: 6
Pressure Inputs: 3 (Single Ended Ground
Temperature Inputs: 2 (2 Wire Bridge)
Input Impedance: > 100K Ohms
Unused: 1
Temperature: ±0.25°F of Reading over 155 –
255 °F Range
Pressure: ± 0.4 PSI of Reading over 0 – 400 PSI
Raw analog range: 0-5 volts DC, ratio metric
with onboard 5VDC supply

Control Outputs:
Number of Outputs: 7, optically isolated
Output Form: SPST (Form A) Solid State Relay
Operating Voltage: 115 / 230 VAC @ 60 Hz
The solid state relays used are suitable for the
following load applications:
In Rush
Holding amps
(per channel)
115 / 230 3.0 0.5
CHANNELS @ 20 deg. C ambient)
3.37 Amps (in housing)
5.0 Amps (bare PC board)

Example Instrumentation Input Devices:

  • Discharge Pressure: T.I. P/N 2CP5-3 (Range – 6.7 – 420 PSIG)
  • Oil Pressure: T.I. P/N 2CP5-3 (Range -6.7 – 420 PSIG)
  • Suction Pressure: T.I. P/N 2CP5-4 (Range -14.7 – 145.2 PSIG)
  • Motor Temperature: UUA35J1 5,000 Ohms @ 25 °C NTC
  • Discharge Temperature:UUA35J1 5,000 Ohms @ 25 °C NTC

ESD Withstand Voltage for No Hard Failures:

2.0 kV


FCC Part 15


  • Number of Indicators: 10 (L.E.D.) Status Lamps (7): Green (output indicator)
  • Alarm Lamp (1): Red (output indicator)
  • Coded Lamp (1): Red (Local indicator)
  • Service Pin lamp (1): Yellow (Local indicator)


Temperature Range:

  • Operating: -40° to +85°C
  • Storage: -40° to +85°C

Humidity Range:

10% to 95% RH, non-condensing at 70oC



Protocol: LonWorks® (LonMark Compliant)

Medium: FT-10 Twisted Pair

Comm. Rate: 78 kilobits per second (kbps)

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