BECKHOFF EP9128 - Manual (Page 39)

Mounting and cabling
Note
EP92x4 Power Distribution Modules
With EP9214 and EP9224 Power Distribution Modules intelligent concepts for voltage sup­
ply are available. Further information may be found under www.beckhoff.com/EP9224.
4.4 UL Requirements
The installation of the EtherCAT Box Modules certified by UL has to meet the following requirements.
Supply voltage
CAUTION
CAUTION!
• by a 24 V
DC
supply voltage, supplied by an isolating source and protected by means of
a fuse (in accordance with UL248), rated maximum 4 Amp, or
• by a 24 V
DC
power source, that has to satisfy NEC class 2.
A NEC class 2 power supply shall not be connected in series or parallel with another
(class 2) power source!
CAUTION
CAUTION!
To meet the UL requirements, the EtherCAT Box Modules must not be connected to unlim­
ited power sources!
Networks
CAUTION
CAUTION!
To meet the UL requirements, EtherCAT Box Modules must not be connected to telecom­
munication networks!
Ambient temperature range
CAUTION
CAUTION!
To meet the UL requirements, EtherCAT Box Modules has to be operated only at an ambi­
ent temperature range of 0 to 55°C!
Marking for UL
All EtherCAT Box Modules certified by UL (Underwriters Laboratories) are marked with the following label.
Fig. 47: UL label
EP9128 39 Version 2.1.0