Datasheet

NX series I/O 33
Heater burnout detection unit
Item Specifications
Model NX-HB3101 NX-HB3201
Name Heater burnout detection unit
Number of points 4 CT inputs and 4 control outputs
CT inputs
specifications
CT input current range 0 to 0.125 A
Input resistance 2.7 approx.
Connectable CTs E54-CT1 and E54-CT3
Max. heater current 50 A AC
Resolution 0.1 A
Overall accuracy (25ºC) ± 5% (full scale)
± 1 digit
Influence of temperature
(0 to 55ºC)
± 2% (full scale)
± 1 digit
Conversion time 10 ms
Control output
specifications
Internal I/O common NPN PNP
Control period 50 to 100,000 ms
Manipulated variable 0 to 100%
Resolution 1 ms
Rated voltage 12 to 24 VDC (10.2 to 28.8 VDC) 24 VDC (15 to 28.8 VDC)
Max. load current 0.1 A/point, 0.4 A/unit
Max. inrush current 1.0 A/point max., 10 ms
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
Disconnection/short-
circuit detection
None
Protective functions None Provided
Dielectric strength 510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
Insulation resistance 20 M min. between isolated circuits (at 100 VDC)
Isolation method Between control output and internal circuit: Photocoupler isolation
No isolation between internal circuits and CT inputs
Unit power consumption 0.75 W max.
I/O power supply source Supplied from the NX bus
Current consumption from I/O power supply 20 mA max.
Current capacity of I/O power supply terminal IOV: 0.1 A max. per terminal
I/O refreshing method Free-run refreshing
Terminal block type Screwless push-in terminal
16 terminals (A + B)
Dimensions (W x H x D) 12 × 100 × 71 mm
Weight 70 g
Circuit layout
NX-HB3101
NX-HB3101
24 VDC
A1 B1
A8 B8
A1 B1
A8 B8
CT
SSR
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
CT1+
CT3+
OUT1
OUT3
CT1-
CT3-
IOV1
IOV3
CT2+
CT4+
OUT2
OUT4
CT2-
CT4-
IOV2
IOV4
V
REF
Amplifier
Approx. 2.7 Ω
OUT1 to OUT4
Internal circuits
Control outputs
IOV1 to IOV4
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
CT inputs
CT1+ to CT4+
CT1- to CT4-
Internal circuits
Terminal wiring
24 VDC
A1 B1
A8 B8
A1 B1
A8 B8
CT
SSR
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
CT1+
CT3+
OUT1
OUT3
CT1-
CT3-
IOG1
IOG3
CT2+
CT4+
OUT2
OUT4
CT2-
CT4-
IOG2
IOG4
NX-HB3201
NX-HB3201
Internal circuits
Control outputs
I/O power supply +
I/O power supply −
OUT1 to OUT4
IOG1 to IOG4
I/O power supply +
I/O power supply −
Internal circuits
Short-circuit
protection
V
REF
Amplifier
Approx. 2.7 Ω
CT inputs
CT1+ to CT4+
CT1- to CT4-
NX bus
connector
(left)
NX bus
connector
(right)
Terminal
Block
Terminal
Block
Internal
circuit GND
NX bus
connector
(left)
NX bus
connector
(right)
Terminal
Block
Terminal
Block
Internal
circuit GND
Additional I/O
power supply
unit
Heater burnout
detection unit
Additional I/O
power supply
unit
Heater burnout
detection unit