Rockwell Automation Publication 1606-RM002A-EN-P - March 2019
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Power Supply - 24V, 10 A, 240 W, Three-phase Input
If more than three units are connected in parallel, a fuse or circuit breaker with a
rating of 15 A or 16 A is required on each output. Alternatively, a diode or
redundancy module can also be used.
Keep an installation clearance of 15 mm (0.59 in.) (left and right) between two
devices and avoid installing devices on top of each other. Do not use devices in
parallel in mounting orientations other than the standard mounting orientation
or in any other condition where a reduction of the output current is required (for
example, altitude).
Verify that the leakage current, EMI, inrush current, and harmonics increase
when using multiple devices.
Figure 33 - Parallel Use
Parallel Use for Redundancy
1+1 Redundancy
Devices can be paralleled for redundancy to gain higher system availability.
Redundant systems require a certain amount of extra power to support the load
in case one device fails. The simplest way is to put two devices in parallel. This is
called a 1+1 redundancy. In case one device fails, the other one is automatically
able to support the load current without any interruption. It is essential to use a
redundancy module to decouple devices from each other. This prevents that the
defective unit becomes a load for the other device and the output voltage cannot
be maintained any more.
For 1+1 redundancy the ambient temperature is not allowed to exceed
70 °C (158 °F).
Unit B
-
+
Load
+
-
AC
DC
AC
DC
-
+
Unit A
Summary of Contents for Allen-Bradley 1606-XLE240E-3
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