Omron, NX-HB Series

• Up to four CT inputs per unit

• Omron's proven heater burnout detection function

• Monitoring of CT currents to detect heater burnouts and SSR failures

• Time-proportional control outputs to drive SSRs

• Control outputs not affected by controller cycle time

• Four control outputs to drive SSRs (100 mA max)

• Heater burnout detection for a single-phase or three-phase heater

• Detachable front connector with screwless Push-In Plus terminals for easy installation and maintenance

Sysmac is a trademark or registered trademark of OMRON corporation in Japan and other countries for OMRON factory automation products.
EtherCAT^® is a registered trademark of beckhoff automation GmbH for their patented technology.
EtherNet/IP^TM is the trademarks of ODVA.
Other company names and product names in this document are the trademarks or registered trademarks of their respective companies.

Item		Specification
Enclosure		Mounted in a panel
Grounding method		Ground to 100 Ω or less
Operating environment	Ambient operating temperature	0 to 55°C
	Ambient operating humidity	10% to 95% (with no condensation or icing)
	Atmosphere	Must be free from corrosive gases.
	Ambient storage temperature	-25 to 70°C (with no condensation or icing)
	Altitude	2,000 m max.
	Pollution degree	2 or less: Conforms to JIS B3502 and IEC 61131-2.
	Noise immunity	2 kV on power supply line (Conforms to IEC61000-4-4.)
	Overvoltage category	Category II: Conforms to JIS B3502 and IEC 61131-2.
	EMC immunity level	Zone B
	Vibration resistance	Conforms to IEC 60068-2-6. 5 to 8.4 Hz with 3.5-mm amplitude, 8.4 to 150 Hz, acceleration of 9.8 m/s², 100 min each in X, Y, and Z directions (10 sweeps of 10 min each = 100 min total)
	Shock resistance	Conforms to IEC 60068-2-27. 147 m/s², 3 times each in X, Y, and Z directions
Applicable standards *		cULus: Listed (UL508), ANSI/ISA 12.12.01, EU: EN 61131-2, C-Tick or RCM, KC Registration, NK, LR

* Ask your OMRON representative for the most recent applicable standards for each model.

Function Specification

Function	Description
Free-Run Refreshing	With this I/O refreshing method, the refresh cycle of the NX bus and I/O refresh cycles of the NX units are asynchronous.
CT Allocation	This function is used to assign each CT input to a corresponding control output.
Reading CT Currents	This function reads CT inputs as heater currents or leakage currents.
Heater Burnout Detection	This function detects heater burnouts. A heater burnout is detected if the control output is ON and the heater current is equal to or less than the heater burnout detection current.
SSR Failure Detection	This function detects SSR failures. An SSR failure is detected if the control output is OFF and the leakage current is equal to or greater than the detection current. An SSR failure is a failure that is caused by an SSR short-circuit.
Time-proportional Output	This function controls a control output by using the manipulated variable from the host controller as a duty ratio. You can also specify the minimum pulse widths and execute immediate output commands.
Load Rejection Output Setting	This function performs a preset output operation when the Heater Burnout Detection unit cannot receive an output set value due to a communications error between the host and the communications coupler unit or due to an error on the NX bus.
Load Short-circuit Protection	This function is used to protect the output circuits of the Heater Burnout Detection unit when an external device short-circuits. This function is supported only by the NX-HB3201.

Heater Burnout Detection unit

Heater Burnout Detection unit (NPN) NX-HB3101

unit name	Heater Burnout Detection unit		Model	NX-HB3101
Number of points	4 CT inputs and 4 control outputs		External connection terminals	Screwless Clamping Terminal Block (16 terminals)
I/O refreshing method	Free-Run refreshing
Indicators	TS indicator and output indicators
CT input section	CT current input range	0 to 0.125 A	Control output section	internal I/O common	NPN
	Input resistance	Approx. 2.7 Ω		Control period	50 to 100,000 ms
	Connectable CTs	E54-CT1 and E54-CT3		Manipulated variable	0% to 100%
				Resolution	1 ms
				Rated voltage	12 to 24 V DC
	Maximum heater current	50 A AC		Operating load voltage range	10.2 to 28.8 VDC
	Resolution	0.1 A		Maximum load current	0.1 A/point, 0.4 A/unit
	Overall accuracy (25°C)	±5% (full scale) ±1 digit		Maximum inrush current	1.0 A/point max., 10 ms
	Overall accuracy (25°C)	±5% (full scale) ±1 digit		Leakage current	0.1 mA max.
	Influence of temperature (0 to 55°C)	±2% (full scale) ±1 digit		Residual voltage	1.5 V max.
	Influence of temperature (0 to 55°C)	±2% (full scale) ±1 digit		Disconnection/ short-circuit detection	None
	Conversion time	10 ms		Protective functions	None
Dimensions (mm)	12 × 100 × 71 mm (W×H×D)		Isolation method	Between control outputs and internal circuits: Photocoupler isolation No isolation between internal circuits and CT inputs
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)		Dielectric strength	510 VAC between isolated circuits for 1 minute with a leakage current of 5 mA max.
I/O power supply method	Supplied from the NX bus.		Current capacity of I/O power supply terminals	IOV: 0.1 A max. per terminal
NX unit power consumption	• Connected to a CPU unit 1.05 W max. • Connected to a communications coupler unit 0.75 W max.		Current consumption from I/O power supply	20 mA max.
Weight	70 g max.
Circuit configuration
Installation method and restrictions	Installation orientation: • Connected to a CPU unit: Possible in upright installation. • Connected to a communications coupler unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram

Heater Burnout Detection unit (PNP) NX-HB3201

unit name	Heater Burnout Detection unit		Model	NX-HB3201
Number of points	4 CT inputs and 4 control outputs		External connection terminals	Screwless Clamping Terminal Block (16 terminals)
I/O refreshing method	Free-Run refreshing
Indicators	TS indicator and output indicators
CT input section	CT current input range	0 to 0.125 A	Control output section	internal I/O common	PNP
	Input resistance	Approx. 2.7 Ω		Control period	50 to 100,000 ms
	Connectable CTs	E54-CT1 and E54-CT3		Manipulated variable	0% to 100%
				Resolution	1 ms
				Rated voltage	24 VDC
	Maximum heater current	50 A AC		Operating load voltage range	15 to 28.8 VDC
	Resolution	0.1 A		Maximum load current	0.1 A/point, 0.4 A/unit
	Overall accuracy (25°C)	±5% (full scale) ±1 digit		Maximum inrush current	1.0 A/point max., 10 ms
	Overall accuracy (25°C)	±5% (full scale) ±1 digit		Leakage current	0.1 mA max.
	Influence of temperature (0 to 55°C)	±2% (full scale) ±1 digit		Residual voltage	1.5 V max.
	Influence of temperature (0 to 55°C)	±2% (full scale) ±1 digit		Disconnection/ short-circuit detection	None
	Conversion time	10 ms		Protective functions	Provided.
Dimensions (mm)	12 × 100 × 71 mm (W×H×D)		Isolation method	Between control outputs and internal circuits: Photocoupler isolation No isolation between internal circuits and CT inputs
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)		Dielectric strength	510 VAC between isolated circuits for 1 minute with a leakage current of 5 mA max.
I/O power supply method	Supplied from the NX bus.		Current capacity of I/O power supply terminals	IOV: 0.1 A max. per terminal
NX unit power consumption	• Connected to a CPU unit 1.05 W max. • Connected to a communications coupler unit 0.75 W max.		Current consumption from I/O power supply	20 mA max.
Weight	70 g max.
Circuit configuration
Installation method and restrictions	Installation orientation: • Connected to a CPU unit: Possible in upright installation. • Connected to a communications coupler unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram

Version Information

Connected to a CPU unit

Refer to the user's manual for details on the CPU units for the CPU unit to which NX units can be connected.

NX unit		Corresponding version *
Model	unit version	CPU unit	Sysmac Studio
NX-HB3101	Ver.1.0	Ver.1.13 or later	Ver.1.17 or higher
NX-HB3201	Ver.1.0	Ver.1.13 or later	Ver.1.17 or higher

* Some units do not have all of the versions given in the above table. If a unit does not have the specified version, support is provided by the oldest available version after the specified version. Refer to the user's manuals for the specific units for the relation between models and versions.

Connected to a communications coupler unit

NX unit		Corresponding version *
NX unit		EtherCAT			EtherNet/IP
Model	unit version	Communications Coupler unit	NJ/NX-series CPU units or NY-series Industrial PC	Sysmac Studio	Communications Coupler unit	Sysmac Studio
NX-HB3101	Ver.1.0	Ver.1.0 or later	Ver.1.05 or later	Ver.1.16 or higher	Ver.1.0 or later	Ver.1.16 or higher
NX-HB3201	Ver.1.0	Ver.1.0 or later	Ver.1.05 or later	Ver.1.16 or higher	Ver.1.0 or later	Ver.1.16 or higher

* Some units do not have all of the versions given in the above table. If a unit does not have the specified version, support is provided by the oldest available version after the specified version. Refer to the user’s manuals for the specific units for the relation between models and versions.

last update: January 11, 2018

(Unit: mm)

Screwless Clamping Terminal Block Type

12 mm Width

* The dimension is 1.35 mm for Units with lot number