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NX-HB

NX-series Heater Burnout Detection Unit

NX-HB

Build a temperature control system with heater burnout detection in conjunction with a temperature input unit and PID instructions

Item list of NX-HB

about this Product Family

Related Contents

last update: October 11, 2016

General Specification

Item Specification
Enclosure Mounted in a panel
Grounding methods Ground of 100 Ω or less
Operating
environment		 Ambient operating
temperature		 0 to 55°C
Ambient operating
humidity		 10 to 95% RH (with no icing or condensation)
Atmosphere Must be free from corrosive gases.
Ambient storage
temperature		 25 to 70°C (with no icing or condensation)
Altitude 2,000 m max.
Pollution degree Pollution degree 2 or less: Conforms to JIS B 3502 and IEC 61131-2.
Noise immunity Conforms to IEC 61000-4-4, 2 kV (power supply line)
Overvoltage category Category II: Conforms to JIS B 3502 and IEC 61131-2.
EMC immunity level Zone B
Vibration resistance Conforms to IEC 60068-2-6.
5 to 8.4 Hz with amplitude of 3.5 mm,
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 (UL 508), ANSI/ISA 12.12.01, EU: EN 61131-2,
C-Tick or RCM, KC: KC Registration

* 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.

Individual Specifications

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
3539_sp_3_1
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
Leakage current 0.1 mA max.
Influence of
temperature
(0 to 55°C)		 ±2% (full scale)
±1 digit		 Residual voltage 1.5 V max.
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		 3539_sp_3_2
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		 3539_sp_3_3

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
3539_sp_4_1
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
Leakage current 0.1 mA max.
Influence of
temperature
(0 to 55°C)		 ±2% (full scale)
±1 digit		 Residual voltage 1.5 V max.
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		 3539_sp_4_2
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		 3539_sp_4_3

Version Information

Connecting with CPU Units

Refer to the user's manual for the CPU Unit 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

* 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.

Connecting with Coupler Units

NX Unit Corresponding version *
EtherCAT EtherNet/IP
Model Unit
version		 Communications
Coupler Unit		 NJ/NX-series CPU
Units or NY-series
Industrial PCs		 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

* 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: October 11, 2016

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