Rockwell Automation 1606-XLP15B Power Supply Reference Manual - Manual (Page 20)

All parameters are specified at 12V, 1.3A, 230Vac input, 25°C ambient and after a 5 minutes run-in time.unless noted otherwise.
20 Rockwell Automation Publication 1606-RM020A-EN-P — March 2014
Bulletin 1606 Switched Mode Power Supplies
20.8. Operation on Two Phases
2
4
0V
+10%
max.
Fuse
L2
L1
L3
L
N
PE
Power Supply
AC
DC
internal
fuse
The power supply can also be used on two phases of a three-phase-system.
Such a phase-to-phase connection is allowed as long as the supplying
voltage is below 240V
+10% . Use a fuse or a circuit breaker to protect the N
input. The N input is not protected internally; in this case, it is connected
to a hot wire. Appropriate fuses or circuit breakers are specified in section
20.4, “External Input Protection”.
20.9. Use Without PE on the Input
From a safety standpoint, the unit is internally designed according to the requirements for Protection Class 1 and 2.
Contact Rockwell Automation if you do not use the PE terminal. A different marking of the front foil is then required.
Grounding of the input is beneficial for a high EMI immunity: symmetrical spikes or fast transients on the input side
can be conducted directly to earth by the built-in filter capacitors. The magnitude of such spikes or fast transients on
the output side caused by the input is much smaller compared to not connecting this terminal to the ground.
Fig. 20-3 Grounded input Fig. 20-4 Ungrounded input
Surge
Y
X
L
N
Ground
Power Supply
+
-
Surge
X
L
N
Power Supply
+
-
24V
Spike