National Instruments 9923 User manual

USER GUIDE AND SPECIFICATIONS
NI 9923
37-Pin DSUB to Screw-Terminal Connector Block
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2|ni.com |NI 9923 User Guide and Specifications
This user guide describes the features of the National
Instruments 9923 DSUB to Screw-Terminal Connector Block. You
can use the NI 9923 to create custom cables for C Series modules
that use 37-pin DSUB connectors.
Note The NI 9923 is compatible with NI Compact
FieldPoint devices.
Caution Do not remove the NI 9923 circuit board from
the enclosure.
Caution Do not supply hazardous voltages
(>30 Vrms/42 Vpk/60 VDC) to the NI 9923.
Caution Before using the NI 9923, read the Operating
Instructions and Specifications for the C Series module to
ensure compliance with safety, EMC, and environmental
regulations.

NI 9923 User Guide and Specifications |© National Instruments |3
Connecting the NI 9923
The NI 9923 provides connections for C Series 37-pin DSUB
modules.
Figure 1. NI 9923 Terminal Assignments
25
6
24
5
23
4
22
3
21
2
20
1
15
34
16
35
17
36
19
18
37
9
28
10
29
SH
33 14 32 13 31 12 30 11 27
8
26
7
Pin 20
Pin 19 Pin 37
Pin 1

4|ni.com |NI 9923 User Guide and Specifications
Connecting the Signals
To wire the NI 9923, complete the following steps while referring
to Figure 2.
Note When using shielded wires or cable, use the
SH terminal on the NI 9923 to terminate the shields.
1. Loosen the captive screws and remove the top cover.
2. Prepare the screw-terminal wire by stripping the insulation.
Refer to the Specifications section for more information on
screw-terminal wiring.
3. Insert the stripped end of the wire fully into the appropriate
terminal. Make sure no exposed wire extends past the screw
terminal.
4. Secure the connection by tightening the screw for the terminal.
Refer to the Specifications section for information on
screw-terminal torque.
5. Route the wire to the NI 9923 opening.
6. Remove slack in the NI 9923 wiring and secure the wires or
cable by threading a zip tie through the two strain relief holes
on the NI 9923 opening.

NI 9923 User Guide and Specifications |© National Instruments |5
7. Reinstall the top cover on the NI 9923 and tighten the
four captive screws.
Figure 2. NI 9923 Parts Locator Diagram
1 Captive Screws
2 Top Cover
3 Terminals
4 Strain Relief Holes
5 Jackscrews
2
3
4
1
5

6|ni.com |NI 9923 User Guide and Specifications
Installing the NI 9923
Connect the NI 9923 to the 37-pin DSUB connector on the module
as shown in Figure 3. Tighten the two jackscrews on the NI 9923
to hold it securely in place. Do not overtighten the jackscrews.
Refer to Figure 2 for the location of the jackscrews.
Figure 3. Installing the NI 9923

NI 9923 User Guide and Specifications |© National Instruments |7
Specifications
The following specifications are typical unless otherwise noted.
Maximum voltage ............................. 30 Vrms/42 Vpk/60 VDC
Operating temperature ...................... –40 °C to 70 °C
Maximum current rating by temperature
Pins 9, 10, 19, 28, & 29
–40 °C to 55 °C.................... ≤5 A
56 °C to 70 °C...................... ≤4 A
Pins 1–8, 11–18, 20–27, & 30–37
–40 °C to 55 °C.................... ≤1 A
56 °C to 70 °C...................... ≤1 A per channel,
≤16 A aggregate
Screw-terminal wiring ...................... 16 AWG to 26 AWG copper
conductor wire with 4.5 mm
(0.18 in.) of insulation
stripped from the end
Torque for screw terminals ............... 0.4 N · m max
(3.4 lb · in. max)
Weight............................................... 82 g (2.9 oz)

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375923C-01 Apr12
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