37
External Power Supply Units
IMS-MN-LMDA42C_A.pdf
LMD CANopen
Regeneration conditions resulting from braking or external driving forces may increase the
VDC supply voltage to an unexpected level. Components not rated for this voltage may be
destroyed or cause malfunctions.
CAUTION
LOSS OF CONTROL DUE TO REGENERATION CONDITION
• Verify that all VDC consumers are rated for the voltage occurring during regeneration conditions (for
example limit switches).
• Use only power supply units that will not be damaged by regeneration conditions.
• Use a braking resistor controller, if necessary.
Failure to follow these instructions can result in injury or equipment damage.
Power Supply Cabling
The following specifications will provide information to help protect against electromagnetic
interference (EMI) and radio frequency interference (RFI). The actual cable type, wire gauge,
shield type, and filtering devices used are dependent on the environment, application, and
system.
WARNING
UNINTENDED EQUIPMENT OPERATION DUE TO EMI AND RFI
• Do not exceed a DC power supply cable length of 50 feet (15.2 m) to an LMD.
• Always use shielded/twisted pairs for the LMD DC power supply cable.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Cable length, wire gauge, and power conditioning devices play a major role in the performance
of the LMD.
The following graphic illustrates the cable configuration for DC power supply cabling under 50
feet (15.2 m) long. If cabling of 50 feet (15.2 m) or longer is required, the additional length may
be gained by adding an AC power supply cable.
Correct American Wire Gauge (AWG) wire size is determined by the current requirement plus
cable length.
The graphic below shows DC power supply cabling under 50’ (15.24 m)
+ -
+
-
≤
50’ (15.24 m)
A
A
B
B
C
C
D
D
Shield to Earth
(Supply End Only)
Supply GND
+VDC Output
Ŀ Type RFI Filter
≥
Required Current
Ferrite Bead
Shielded Twisted Pair (See AWG Table for Size)
Electrolytic Capacitor, 500
µ
F per Amp
+V
GND
