Lenze EMF2133IB - Manual (Page 29)

Installation
Electrical installation
Voltage supply
5
l
29 EDSMF2133IB EN 5.0
External voltage supply
)
Note!
Always use a separate power supply unit in every control cabinet and safely
separate it according to EN 61800−5−1 ("SELV"/"PELV") in the case of external
voltage supply and larger distances between the control cabinets.
External voltage supply of the communication module is required if communication via
the fieldbus is to be maintained even when the power supply of the standard device fails.
)
Note!
With external voltage supply of the communication module, the active bus
terminating resistor is fed independently of the operation of the basic device.
Thus the bus system remains active even if the basic device is switched off or
fails.
Plug connector Explanation
"+" V = 24 V DC (21.6 V − 0% ... 26.4 V + 0 %)
I = 120 mA
"−" Reference potential for external voltage supply
Controller External voltage supply
820X Always required
821X / 822X / 824X /
93XX / 9300 Servo PLC /
Drive PLC / ECSxS /
ECSxP / ECSxA Only required if the mains supplying the corresponding controller is to be switched off
but communication must not be interrupted.
For these basic devices the internal voltage supply can be used.
8200 vector See notes given in "Internal voltage supply" ^ 28