General operation / function
EJ19xx and EJ29xx
14
Version: 1.2.0
Note
External heat sources / radiant heat / impaired convection
The maximum permissible ambient temperature of 55°C was checked with the sample con-
figuration described above. Impaired convection; an unfavorable location near heat sources
or an unfavorable configuration of the EtherCAT EJ modules may result in overheating of
the modules.
The key parameter is always the maximum permitted internally measured temperature of
110°C, above which the TwinSAFE components switch to safe state and report an error.
The internal temperature can be read from the TwinSAFE components via CoE.
5.2.4
Electrical 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!
5.2.4.1
Connections between EJ modules
The electrical connections between the EJ Bus Coupler and EJ modules are realized automatically by
plugging the components into the EJ backplane.
Note
Note the maximum E-bus current!
Observe the maximum current that your EJ Bus Coupler can supply to the E-bus! Use the
EJ9400 power supply module if the current consumption of your modules exceeds the max-
imum current your EJ Bus Coupler can provide.
5.2.4.2
Overvoltage protection
If protection against overvoltage is necessary in your plant, provide a surge filter for the voltage supply to the
Bus Terminal blocks and the TwinSAFE EJ modules.
5.3
Digital input
5.3.1
Parameterization
Two indices are provided under the safety parameters for the parameterization of the inputs. These are the
general settings for the test pulse outputs and the channel-specific settings for the input filter. In the
TwinSAFE EJ modules an input module consists of two channels.
