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NX-series Advanced Temperature Control Units


Advanced Temperature Control Unit, 4 points, Heating or cooling control, MIL Connector

Number of Channels 4 CH
Input type Temperature Sensor, CT input
Number of outputs 8 point
Heater burnout alarm Equipped
External connection method MIL connector (34-poles x 2)

Item list of NX-HTC

  • Ratings / Performance
Ratings and Specifications
Number of Channels4 CH
External connection methodMIL connector (34-poles x 2)
Input typeTemperature Sensor, CT input
I/O refreshing methodFree-Run refreshing
NX Unit power consumptionConnected to a CPU Unit: 1.55 W max.
Connected to Communications Coupler Unit: 1.35 W max.
Isolation methodBetween sensor inputs and internal circuitry: Transformer for power supply and digital isolator for signals.
Between inputs: Transformer for power supply and digital isolator for signals.
Between internal circuits and CT input: Not isolated
Between control outputs and internal circuits: Photocoupler (voltage output), digital isolator (linear current output)
Between control outputs: Not isolated
Heater burnout alarmEquipped
InputTemperature inputK, J, T, E, L, U, N, R, S, B, C/W, PLⅡ, Pt100 (Three-wires) , JPt100 (Three-wires) , Pt1000 (Three-wires) , Current (4 to 20 mA, 0 to 20 mA) , Voltage (1 to 5 V, 0 to 5 V, 0 to 10 V)
Influence of conductor resistanceThermocouple input: 0.1 ℃/Ω (100 Ω or less per conductor)
Platinum resistance thermometer input: 0.06 ℃/Ω (20 Ω or less per conductor)
Conversion time50 ms/Unit
Input detection current0.25 mA
ResolutionSensor inputs: 0.1 ℃ max. (0.01 ℃ max. at input type Thermocouple K (-50 to 700 ℃) and Pt100 (-200 to 500 ℃) only)
CT input: 0.1 A
OutputNumber of outputs8 point
Rated voltage24 VDC
Operating Load Voltage Range12 to 28.8 VDC
Output typeVoltage output (for driving SSR)Linear current output
Internal I/O common processingPNP
Maximum load current21 mA/point, 84 mA/Unit
Linear current outputOutput range0 to 20 mA
4 to 20 mA
Insulation resistanceBetween isolated circuits: 20 MΩ min. (100 VDC)
Dielectric strengthBetween isolated circuits: 510 VAC 1 min, leakage current 5 mA max.
Vibration resistanceConforms to IEC60068-2-6, 5 to 8.4 Hz with 3.5-mm amplitude, 8.4 to 150 Hz acceleration 9.8 m/s2, each in X, Y, and Z directions for 100 min (10 sweeps of 10 min each = 100 min total)
Shock resistanceConforms to IEC60068-2-27, 147 m/s2, 3 times each in X, Y, and Z directions
Noise immunityConforms to IEC61000-4-4, 2 kV on power supply line
Ambient temperature (Operating)0 to 55 ℃
Ambient temperature (Storage)-25 to 70 ℃ (with no freezing or condensation)
Ambient humidity (Operating)10 to 95 % (with no freezing or condensation)
Overvoltage categoryCategory II: Meets IEC 61010-2-201
EMC immunity levelZone B
GroundLess than 100 Ω
Mounting methodDIN track mounting
Weight125 g max.
Sold separatelyCold junction sensors: NX-AUX03
Current Transformer (CT): E54-CT1/E54-CT1L/E54-CT3/E54-CT3L


NX-series Advanced Temperature Control Units