Signal Cables; Fig. 15 Signal Lines - Beckhoff EP1957-0022 Operating Instructions Manual

Operation
External heat sources / radiant heat / impaired convection
The maximum permissible ambient temperature of 60°C was tested with the example configuration
described above. Impaired convection or an unfavorable location near heat sources may result in
overheating of the TwinSAFE components.
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

Signal cables

Permitted cable length
Fig. 15: Signal lines
When connecting a single switching contact via a dedicated continuous cable (or via a sheathed cable), the
maximum permitted cable length is 100 m if a sensor test is active.
The use of contact points, connectors or additional switching contacts in the cabling reduces the maximum
propagation.
30
NOTE
Version: 2.0.0 EP1957-0022 and EP1957-2222