Getting Started with NI SMD-7620/7621 and NI 73xx
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© National Instruments
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9
3.
Connect the positive lead of the +24 V external power supply to the V terminal and the
negative lead to the C terminal, then connect the V terminal to the V
iso
terminal and the
C terminal to the C
iso
terminal. If you require isolation, you can connect a separate 5 to
30 VDC power supply to the V
iso
and C
iso
terminals to use the isolation feature of the
UMI-7772/7774. Refer to the
NI UMI-7772/7774 User Guide and Specifications
for more
information.
Caution
Do not plug in or turn on any power to the system until after all hardware
connections are complete.
Figure 3 shows the power terminal block.
Figure 3.
UMI-7772/7774 Power Connection
Step 2: Connect the Drive Command Signals to the
UMI-7772/7774
Complete the following steps to connect the Drive Command signals to the UMI-7772/7774.
1.
Connect the DB15M pigtail cable to the UMI-7772/7774 Axis 1 Control connector.
2.
Connect the SMD-7620/7621 X1/STEP- terminal (pin 2) to the DB15M cable pin 4 wire
(orange) which corresponds to the UMI-7772/7774 Step (CW) terminal.
3.
Connect the SMD-7620/7621 X2/DIR-terminal (pin 4) to the DB15M cable pin 12 wire
(light green) which corresponds to the UMI-7772/7774 Dir (CCW) terminal.
4.
Connect the SMD-7620/7621 X1/STEP+ terminal (pin 1) and the SMD-7620/7621
X2/DIR+ terminal (pin 3) to the DB15M cable pin 3 wire (red) which corresponds to the
UMI-7772/7774 +5V OUT terminal.
C
V
Vi
s
o
Ci
s
o
+24 V Extern
a
l
Su
pply(+) Termin
a
l
V
(24VDC±10%)
(5-
3
0VDC)
Vi
s
o
INHIBIT ALL
POWER
POWER
TRIGGER / BREAKPOINT
DIGITAL I/O
ANALOG INPUT
GLOBAL
S
TOP
INTERLOCK
+24 V Extern
a
l
Su
pply(–) Termin
a
l
V
Vi
s
o
Ci
s
o
C
