Allen-Bradley 1606-XLBRED20, Справочное руководство, Страница: 14 / 18

14 Rockwell Automation Publication 1606-RM111A-EN-P - July 2020
Using Only One Input
Instead of Both Channels
You can use only one input instead of both up to a nominal input current of
20 A at 55 °C (131 °F) max ambient temperature. However, it is always
recommended to connect both input path in parallel for reduced power losses
and voltage drop. In cases when this is not possible, the following values can be
expected:
In Figure 1 the redundancy module is used with a 1606-XLB480E power supply.
Recommendations for
Redundancy
Recommendations for the configuration of redundant power systems:
• Use three-phase power supplies to gain functional safety if one phase
fails.
• When single-phase power supplies are used, connect them to different
phases or mains circuits if possible.
• Use separate input fuses for each power supply.
• Set the power supply in “Parallel-Use” mode if this feature is available.
• It is desirable to set the output voltages of all power supplies to the same
value.
Inductive and Capacitive
Loads
The unit is designed to supply any kind of loads, including unlimited
capacitive and inductive loads.
Attributes Values Notes
Voltage drop, input to output
Typ 585 mV at 1 x 10 A, 25 °C (77 °F), see Figure 12
Typ 645 mV at 1 x 20 A, 25 °C (77 °F), see Figure 12
Power losses
— 0 W at 0 A, 25 °C (77 °F)
Typ 5.85 W at 10 A, 25 °C (77 °F)
Typ 12.9 W at 20 A, 25 °C (77 °F)
Figure 12 - Input to Output Voltage Drop When Only One Input is Used Figure 13 - Test Setup for Voltage Drop Measurements
Voltage Drop, Typ
200 mV
300 mV
400 mV
500 mV
600 mV
700 mV
5 A 15 A 20 A 10 A 0
Input, Output Current
A ... 25 °C
B... 60 °C
A
B
V
A
Power Supply
24V, 20 A
+
-
I
1
U
1
Voltage Drop U
1
= U
OUT
-
Output
A
V
I
OUT
U
OUT
Variable
Load,
0…20 A
Redundancy Module
Input 1
Input 2
Output
Input 2
must not
be used