Rockwell Automation Publication 1606-RM100A-EN-P - July 2020
17
Power Supply - 24V, 5 A, 120 W, Single-phase Input Reference Manual
Safety and Protection
Features
Dielectric Strength
The output voltage is floating and has no ohmic connection to the ground. The
output is insulated to the input by a double or reinforced insulation.
Type and routine tests are conducted by the manufacturer. Field tests can be
conducted in the field using the appropriate test equipment that applies the
voltage with a slow ramp (2 s up and 2 s down). Connect all input-terminals
together and all output poles before conducting the test. When testing, set the
cutoff current settings to the value in the table below.
We recommend that either the + pole or the – pole is to be connected to the
protective earth system. This helps to avoid situations in which a load starts
unexpectedly or cannot be switched off when unnoticed earth faults occur.
Isolation resistance
Min
500 M Ohm
At delivered condition between input and output, which is measured with 500V DC
Min
500 M Ohm
At delivered condition between input and PE, measured with 500V DC
Min
500 M Ohm
At delivered condition between output and PE, measured with 500V DC
Min
500 M Ohm
At delivered condition between output and DC OK contacts, which are measured with 500V DC
PE resistance
Max
0.1 Ohm
Resistance between PE terminal and the housing in the area of the DIN rail mounting bracket
Output overvoltage protection
Typ
30.5V DC
Max
32.0V DC
In case of an internal anomaly, a redundant circuit limits the maximum output voltage. The output shuts down and performs three restart
attempts. If the failure continues, the output shuts down. Cycle input power to reset.
Class of protection
I
According to IEC 61140 — A PE (Protective Earth) connection is required
Degree of protection
IP 20
According to EN/IEC 60529
Over-temperature protection
Included
Output shutdown with automatic restart.
Temperature sensors are installed on critical components inside the unit and turn off the unit in safety
critical situations, which can happen, for example, when ambient temperature is too high, ventilation is
obstructed or the derating requirements are not followed. There is no correlation between the operating
temperature and turn-off temperature since this is dependent on input voltage, load, and installation
methods.
Input transient protection
Metal Oxide
Varistor (MOV)
For protection values See
.
Internal input fuse
Included
Not user replaceable slow-blow high-braking capacity fuse.
Touch current (leakage
current)
Type.
0.10 mA/0.27 mA
At 100V AC, 50 Hz, TN-,TT-mains/IT-mains
Type.
0.13 mA/ 0.38 mA
At 120V AC, 60 Hz, TN-,TT-mains/IT-mains
Type.
0.20 mA/ 0.60 mA At 230V AC, 50 Hz, TN-,TT-mains/IT-mains
Max
0.13 mA/ 0.35 mA
At 110V AC, 50 Hz, TN-,TT-mains/IT-mains
Max
0.17 mA/ 0.51 mA
At 132V AC, 60 Hz, TN-,TT-mains/IT-mains
Max
0.27 mA/ 0.81 mA
At 264V AC, 50 Hz, TN-,TT-mains/IT-mains
A
B
C
D
Type test
60 s
2500V AC
3000V AC
1000V AC
500V AC
Routine test
5 s
2500V AC
2500V AC
500V AC
500V AC
Field test
5 s
2000V AC
2000V AC
500V AC
500V AC
Field test cut off current settings
> 10 mA
> 10 mA
> 20 mA
> 1 mA
