BECKHOFF EP9128 - Manual (Page 38)

Mounting and cabling
Further available power cables may be found in the Beckhoff catalog or on our internet pages (http://
www.beckhoff.com).
Technical data
Technical data
Rated voltage according to IEC60 664­1 60 V
AC
/ 75 V
DC
Contamination level according to IEC 60 664­1 3/2
Insulation resistance IEC 60 512­2 >10 9 W
Current carrying capacity according to IEC 60512­3 4 A
Volume resistance according to IEC 60512­2 < 5 mW
Protection class according to IEC 60529 IP65/66/67, when screwed together
Ambient temperature ­30°C to +80°C
4.3.4 Power cable conductor losses
The ZK2020­xxxx­yyyy power cables should not exceed the total length of 15 m at 4 A (with continuation).
When planning the cabling, note that at 24 V nominal voltage, the functionality of the module can no longer
be assured if the voltage drop reaches 6 V. Variations in the output voltage from the power supply unit must
also be taken into account.
Fig. 46: Power cable conductor losses
Example
8 m power cable with 0.34 mm² cross­section has a voltage drop of 3.2 V at 4 A.
EP9128 38 Version 2.1.0