Wiring

 

Risk of injury!

The EasyNOₓ is designed for operation in circuits with protected extra-low voltage (PELV). The voltages in these circuits must not exceed 50 V AC or 75 V DC.

The EasyNOₓ must not be electrically connected to circuits which carry dangerously high voltages or which could do so if a single fault occurs.

Therefore, the following conditions, among others, must be fulfilled:

  • The power supply may only be provided from power supply units with safe electrical isolation or from batteries.
  • Relays with safe isolation must be used for coupling to circuits that carry or in the event of a failure could carry dangerous voltage.
  • All currently applicable standards and regulations must be taken into account.

  

Do the wiring as follows:

900_Abmessungen_EasyNOx-in-Gehäuse

Designation

Function

Power in
24 VDirect current symbol

Earth,
L +, L –

Terminals for the power supply of the EasyNOₓ system (16 V DC to 32 V DC, nominal voltage 24 V DC)

Power out

L –, L +

Terminals for passing through the supply voltage to the first CAN bus/NOX sensor module (e.g. via the CAN bus hybrid cable from MOTORTECH)

CAN1
CANopen

Shield, Lo, Hi, Com

Terminals of the CAN bus interface CAN1 (protocol CANopen®) for connection to the devices in the CANopen® network the including I/O communication modules BPlus and the I/O modules supporting device profile CiA® 401 or CiA® 404 (see Wiring CANopen® Network (CAN1))

CAN2
J1939

Com, Hi, Lo, Shield

Terminals of the CAN bus interface CAN2 (protocol J1939) for connection to the first CAN bus/NOX sensor module (e.g. via the CAN bus hybrid cable from MOTORTECH)

 

Use suitable wire end ferrules for each wire that you place on a terminal.

Use a three-core round cable with a minimum cross section of 1.5 mm2 to connect the EasyNOₓ system to the power supply. The earth of the EasyNOₓ system must be connected to the earth of the system.

For CAN bus wiring, only use shielded CAN cables in compliance with the standards ISO 11898-2 and CiA® 303-1. Connect the shields to the appropriate terminals (Shield).

Unless you use the CAN bus hybrid cable from MOTORTECH, the CAN and power supply cables to the CAN bus/NOX sensor modules must be routed in parallel.

The power supply cables to the CAN bus/NOX sensor modules should have a minimum wire cross-section of 1.5 mm2. Depending on the total cable length of both power supply cables and the number of CAN bus/NOX sensor modules connected, provide sufficient supply voltage to the EasyNOₓ. Possible wire cross-sections and total cable lengths depending on the supply voltage can be found in the following tables.

Wire cross-section 1.5 mm2

Total cable length

Minimum supply voltage

1 module

2 modules

25 m (82')

18 V DC

20 V DC

50 m (164')

20 V DC

24 V DC

 

Wire cross-section 2.5 mm2

Total cable length

Minimum supply voltage

1 module

2 modules

25 m (82')

17.3 V DC

18.5 V DC

50 m (164')

18.5 V DC

21 V DC

 

Insert the supplied sealing inserts and sealing insert pins into the cable glands through which you do not feed any cables. Close all cable glands with a tightening torque of 8 Nm (5.9 lb-ft).

Close the door of the EasyNOₓ housing after wiring the EasyNOₓ and turn the locks of the door to the closed position (see section Opening and Closing of Housing).