Motortech EasyNOx, Operating Manual

Page: 72 / 142

7 Wiring and Configuration
72 Rev. 06/2021
7.4.2 Wiring of Power Supply
The I/O communication module is designed for wiring via a terminal strip in the control cabinet.
The I/O communication module must be supplied with power via the control cabinet of the re-
spective engine. For this purpose, use the wires L– and L+ of the left relay connector
.
To ensure error-free device communication in the CAN bus, make sure that the potential differ-
ence between the voltage supply grounds of the I/O communication modules and the EasyNO
ₓ
is
as small as possible.
7.4.3 CAN Bus Wiring, CAN Bus Termination
The I/O communication module is designed for wiring via a terminal strip in the control cabinet.
Common mode voltage in CAN bus
Error-free communication of the devices on the CAN bus is only guaranteed
if the voltage levels of the signal lines CAN Hi and CAN Lo are within the
range of –2 V to +7 V. If this common mode voltage range is not maintained,
use a CAN bus insulator (available from MOTORTECH as accessory) for
potential isolation between the interfaces.
On the left relay connector
of the I/O communication module, the white wire CAN Hi and the
brown wire CAN Lo are used for the CAN connection to the previous device in the CANopen
®
net-
work. Use the yellow wire CAN Hi and the green wire CAN Lo of the left relay connector to
connect the I/O communication module to the following device in the CANopen
®
network. If the
I/O communication module is the last device in the CANopen
®
network, connect the supplied
120

terminating resistor to these wires.
Reference ground of the CAN bus interface of the I/O communication module is the supply volt-
age ground.
On the EasyNO
ₓ
side, connect the shield of the CAN cable to the Shield terminal in the EasyNO
ₓ
.
On the module side, connect the shield of the CAN cable to the earth of the control cabinet for
each I/O communication module. Connect the shields of the CAN cables of all devices in the CAN
bus with each other.
7.4.4
Wiring of Inputs and Outputs
The I/O communication module is designed for wiring via a terminal strip in the control cabinet.
Wire the binary and analog inputs and outputs of the I/O communication module as needed.
Note that, in the EasyNO
ₓ
, you must assign the desired function to the wired inputs and outputs
of the I/O communication module before you can use them (see section Preferences on
page 122). To do so, the respective I/O communication module must have been added as a
device in the EasyNO
ₓ
(see following section Device Setup EasyNO
ₓ
on page 73).
Reference ground of the analog and binary inputs and outputs of the I/O communication module
is the supply voltage ground.