Electrical Data

The EasyNOₓ has the following electrical characteristics:

Feature

Value

Power consumption

Without CAN bus/NOX sensor module:

  • 5.3 W typical, max. 22.8 W

With up to two CAN bus/NOX sensor modules with NOX sensor P/N 56.03.003:

  • Max. 100 W in measuring operation
  • During heating up to 176 W for a short period

Power supply

Nominal voltage: 24 V DC
Operating voltage: 16 V DC to 32 V DC

Required current

Without CAN bus/NOX sensor module:

  • Max. 1.5 A

With up to two CAN bus/NOX sensor modules with NOX sensor P/N 56.03.003:

  • Max. 4.7 A in measuring operation
  • During heating up to 7.9 A for a short period

Real-time clock accuracy

± 30 ppm at 25 °C (77 °F)

Internal backup battery

Type: CR1220 (3 V, Li-Ion)
Service life: approx. 8 years (depending on application)

 

The measuring inputs of the CAN bus module have the following electrical data:

Feature

Value

Resolution

16 bit

Thermocouple inputs

Quantity: 2

Suitable for thermocouples of type K, class 1 as per IEC 584

With cold junction compensation

Measuring range: –200 °C to +1,200 °C (–328 °F to +2,192 °F)

Measurement resolution: 0.1 K

Measuring accuracy: ± 0.1 K

Sampling rate: 100 Hz per input

The measuring point of the thermocouple must be insulated from the housing.

Analog current inputs

Quantity: 2

Permissible current: max. 22 mA

Current range for measured values: 4 mA to 20 mA

Measurement resolution: 0.001 mA

Measuring accuracy: 0.01 % FS

Sampling rate: 200 Hz per input

Period CAN message

200 ms

 

The measuring probe of the NOX sensor P/N 56.03.003 has the following characteristics:

Feature

Value

Measuring range nitrogen oxide (NOX)

0 ppm to 3,012 ppm

Measuring accuracy nitric oxide (NO)

See table 1, valid measured values from O2 ≥ 1 vol%

Response time nitric oxide (NO)

t10–90: max. 1,800 ms at exhaust gas velocity 10 m/s

Light-off time nitric oxide (NO)

Max. 80 s after dew point release

Cross sensitivity NOX measurement

Ammonia (NH3) typ. 110 %

Sensitivity NOX measurement

Nitrogen dioxide (NO2) typ. 85 %

Measuring range oxygen (O2)

0 % to 20.95 %

Measuring accuracy oxygen (O2)

See table 2

Response time oxygen (O2)

t10–90: max. 800 ms at exhaust gas velocity 11 m/s

Light-off time oxygen (O2)

Max. 45 s after dew point release

Exhaust gas velocity

10 m/s to 100 m/s

 

Table 1: Measuring accuracy nitric oxide (NO)

Measurement

Measuring accuracy at O2 ≥ 1 vol%

New

Aged

0 ppm

± 8 ppm abs

± 10 ppm abs

90 ppm

± 10 ppm abs

± 12 ppm abs

1,500 ppm

± 8 % rel

± 10 % rel

 

Table 2: Measuring accuracy oxygen (O2)

Measurement

Gas composition

Measuring accuracy

 

New

Aged

0 %

N2 with 1 % H2O

± 0.2 % abs

± 0.3 % abs

8.29 %

8.29 % O2 in N2; 0 % H2O

± 6 % rel

± 8 % rel

12 %

12 % O2 in N2; 0 % H2O

± 6 % rel

± 8 % rel

20.95 %

20.95 % O2 in N2; 0 % H2O

± 6 % rel

± 8 % rel

  

The optional I/O communication module has the following electrical characteristics:

Feature

Value

Power consumption

0.72 W with unloaded outputs

Power supply

Nominal voltage: 24 V DC
Operating voltage: 8 V DC to 32 V DC

Required current

30 mA at 24 V and with unloaded outputs

Binary input

Low level: 0 V
High level: corresponds to supply voltage

Safe low level at 24 V: 0 V to 12 V
Safe high level at 24 V: 14 V to 24 V

Binary outputs

Quantity: 3

Plus/ground switching

Low level: 0 V
High level: corresponds to supply voltage

Analog input

Current range for measured values: 4 mA to 20 mA

Analog output

Output current: 4 mA to 20 mA