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The NI ISM-7413 contains an internal fuse that connects to the power supply positive (+)
terminal. This fuse is not user-replaceable. If you want to install a user-replaceable fuse in your
system, install a fast-acting 4 A fuse in line with the positive (+) power supply lead. Figure 3
shows the NI ISM-7413 connections.
Figure 3. Orientation of the NI ISM-7413 Power Connector
Caution
void your warranty.
Caution
the DC power supply and the NI ISM-7412.
When you rapidly decelerate a load from a high speed, much of the kinetic energy of that load
transfers back to the power supply. This transfer can trigger the overvoltage protection of a
switching power supply, causing it to shut down. Unregulated power supplies generally do not
have overvoltage protection and have large capacitors for storing energy coming back from the
drive. NI offers the SMD-7700 regeneration clamp, part number 748908-01, to solve this
problem.
+5V Keep-Alive
Connecting a constant 5 V power source, 4 A or greaer, to the +5V terminal will keep the digital
logic active if the DC bus voltage is interrupted. This can be used to maintain the encoder
position even when power is interrupeted.
Choosing a Power Supply
NI offers two power supplies for the NI ISM-7413:
•
NI PS-12 (24 V, 6.3 A)
•
NI PS-13 (48 V, 6.7 A)
4 | ni.com | NI ISM-7413 Ethernet Integrated Stepper User Manual
Do not reverse the wires. Reverse connection will damage your drive and
To satisfy the EMC Directive of CE, a line filter must be installed between
+VDC
GND
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