General operation / function
EJ19xx and EJ29xx
13
Version: 1.2.0
5.2.3
Mechanical installation
DANGER
Risk of injury!
Bring the bus system into a safe, de-energized state before starting installation, disassem-
bly or wiring of the devices!
5.2.3.1
Control cabinet / terminal box
The TwinSAFE EJ modules must be installed in a control cabinet or terminal box with IP54 protection class
according to IEC 60529 as a minimum.
5.2.3.2
Installation position and minimum distances
For the prescribed installation position the backplane is mounted horizontally (EJ plug connector vertical),
and the connection surfaces of the EJ modules face forward (see diagram below). The EJ modules are
ventilated from below, which enables optimum cooling of the electronics through convection. The direction
indication “down” corresponds to the direction of positive acceleration due to gravity.
Fig. 2: Installation position and minimum distances
In order to ensure optimum convection cooling, the distances to neighboring devices and to control cabinet
walls must not be smaller than those shown in the diagram.
5.2.3.3
Temperature measurement
The temperature measurement consists of an EJ1100 EtherCAT coupler, to which EJ modules are attached,
based on the typical distribution of digital and analog signal types at a machine. On the EJ6910 a safety
project is active, which reads safe inputs and enables safe outputs during the measurement.
