5
Electrical installation
Installation instructions (all versions)
Operating Instructions – MOVIFIT
®
MC
42
5.3.7
Dimensioning the 24 V voltage supply
This chapter describes the dimensioning of the DC 24 V supply.
The following table gives an overview of the current consumption and power demand
of the DC 24 components of MOVIFIT
®
:
24 V voltage
level
Component
Fieldbus function level
Current
consump-
tion
Power at
V
IN
= 24 V
1)
24V_C
MOVIFIT
®
control elec-
tronics
"Classic" PROFIBUS
100 mA
2.4 W
"Classic" DeviceNet™
100 mA
2.4 W
"Classic" PROFINET IO
250 mA
6.0 W
"Technology" PROFIBUS
250 mA
6.0 W
"Technology" DeviceNet™
200 mA
4.8 W
"Technology" PROFINET IO
250 mA
6.0 W
"Technology" ModbusTCP
250 mA
6.0 W
"Technology" EtherNet/IP™
250 mA
6.0 W
POF option L10
180 mA
4.0 W
Sensors at DI.. (VO24_I – VO24_III)
2)
2)
24V_S
Sensors at DI.. (VO24_IV)
2)
2)
Actuators at DO.. (VO24_IV)
2)
2)
24V_P
MOVIFIT
®
MC with n x MOVIMOT
®
MM..D
n x 120 mA
n x 2.9 W
MOVIFIT
®
SC (motor starter)
100 mA
2.4 W
MOVIFIT
®
FC (inverter)
180 mA
4.3 W
24V_O
PROFIsafe option S11
100 mA
2.4 W
S12A safety option
100 mA
2.4 W
S12B safety option
100 mA
2.4 W
Sensors at F-DI..
2)
2)
Actuators at F-DO..
2)
2)
1) The power demand is respectively reduced/increased with deviating voltage input.
2) Observe the specifications of the sensor/actuator manufacturer for this value. If several sensors/actua-
tors are use with the MOVIFIT®, multiply the value by the number of sensors/actuators.
When the 24 V supply 24V_P of the inverter power section is connected or the STO
safety function is deactivated, increased capacitive charging currents may briefly oc-
cur.
The duration and amount of the charging currents depend on:
• Cable length and cross section
• Number of stations that are connected simultaneously
• Characteristics such as internal resistance and current limiting as well as overload
capacity of the 24 V power supply unit
The 24 V supply and the lines must be configured in a way that all units are always
supplied with at least 18 V.
19484828/EN – 01/2015
