National Instruments NI SCB-68 HSDIO Instruction Manual

CONNECTION GUIDE AND SPECIFICATIONS
NI SCB-68 HSDIO
68-Pin Shielded Connector Block
The NI SCB-68 HSDIO is a shielded I/O connector block with 72 screw terminals for
connecting signals to a 68-pin very-high-density cable interconnect (VHDCI) connector.
Setting up the NI SCB-68 HSDIO
Before you begin, review the following safety information about hazardous voltages and
connector blocks.
Cautions Do not connect hazardous voltages (>30 Vrms/42 Vpk/60 VDC). Refer to
your device documentation for information about the electrical limits of your device.
Install the cover before use. To avoid electrical shock, do not remove NI SCB-68
HSDIO covers unless you are qualified to do so. Before removing the cover,
disconnect any live circuit from the connector block. Replace the cover for use.
The chassis ground lug on the NI SCB-68 HSDIO is for grounding high-impedance
sources, such as a floating source (1 mA maximum). Do not use the chassis ground
lug as a safety earth ground.
NATIONAL
INSTRUMENTS

2|ni.com |NI SCB-68 HSDIO Connection Guide & Specifications
Caution To ensure the specified EMC performance, operate this product only with
shielded cables and accessories.
Figure 1 shows the parts of the NI SCB-68 HSDIO.
Figure 1. NI SCB-68 HSDIO Parts Locator Diagram
1 Top cover (required)
2 Quick reference label
3 Enclosure base
4 Strain-relief screws
5 Strain-relief bar
6 NI SCB-68 HSDIO board assembly
1
2
3
4
5
4
6
NATIONAL
INSTRUMENTS

NI SCB-68 HSDIO Connection Guide & Specifications |© National Instruments |3
Figure 2 shows the connections on the NI SCB-68 HSDIO board assembly.
Figure 2. NI SCB-68 HSDIO Circuit Board Diagram
To get started with the NI SCB-68 HSDIO, complete the following steps while referring to
Figures 1 and 2.
Note You can stand up the cover of the NI SCB-68 HSDIO for easy reference, as
shown in Figure 1.
1. (Optional) Mount the NI SCB-68 HSDIO on a DIN rail as described in the Mounting the
NI SCB-68 HSDIO on a DIN Rail section.
2. Remove the cover.
3. Remove the film from both sides of the cover.
4. Adjust the strain-relief bar by removing the strain-relief screws with a #2 Phillips
screwdriver.
1 Strobe
2 PFI lines
3 68-pin I/O connector
4 Clock
5 Screw terminals
6SMBPads
7 Ground lugs
PFI2
PFI0
PFI0
PFI1 PFI3
DIO20
DIO21 DIO13
DIO22
STROBE
DIO24
DIO25
DIO26
DIO27
DIO28
DIO30
DIO29
DIO31
DIO23 DIO15
DIO14
DIO12
DIO19 DIO11
DIO10DIO18
DIO17 DIO9
DIO8DIO16
CLK OUT
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
DIO6
DIO7
STROBE
GND
DIO24
GND
DIO25
GND
DIO26
GND
DIO27
GND
DIO28
GND
DIO29
GND
DIO30
GND
DIO31
GND
DIO16
GND
DIO17
GND
DIO18
GND
DIO19
GND
GND
DIO23
GND
DIO22
GND
DIO21
GND
DIO20
DIO8
GND
DIO9
GND
DIO10
GND
DIO11
GND
DIO12
GND
DIO13
GND
DIO14
GND
DIO15
GND
CLK OUT
GND
DIO0
GND
DIO1
GND
DIO2
GND
DIO3
GND
GND
DIO7
GND
DIO6
GND
DIO5
GND
DIO4
SCB-68 HSDIO
CAUTION: SEE MANUAL FOR ELECTRICAL RATINGS CAUTION: INSTALL COVER PRIOR TO USE
FOR PATENTS:NI.COM/PATENTS
PFI2
PFI1 PFI3
36
35
4
3
38
37
6
5
40
39
8
7
42
41
68
67
1
2
16
15
50
49
64
26
47
48
13
14
45
46
11
12
43
44
10
9
30
35
57
58
23
24
55
56
21
22
53
54
19
20
51
50
17
18
33
34
65
66
31
32
63
62
29
28
61
62
27
28
59
60
25
24
S/N
34
1
36 68
154974B-01L
J4 J5
J1
J3
C5
C9
C7
C10
C8
C6
J2
5
55
76 6
6
7
3541 22 6

4|ni.com |NI SCB-68 HSDIO Connection Guide & Specifications
5. Prepare the shielded, multi-conductor cable by stripping the insulation and shield(s) to
expose enough signal wire to connect from just inside the strain-relief bar to the appropriate
screw terminal. Ensure that the shield drain wire(s) of the shielded cable is long enough to
connect to one of the two ground lugs on the circuit board, which are shown in Figure 2.
6. Connect the wires of the shielded, multi-conductor cable to the screw terminals by stripping
6 mm (0.25 in.) of insulation, inserting the wires into the screw terminals, and securely
tightening the screws with a flathead screwdriver to a torque of 0.5-0.6 N · m (4-5 in. · lb).
Note Refer to the Special Considerations for HSDIO Connections section for
information about appropriate cables and signal termination.
Caution To ensure the specified EMC performance, signal wires routed outside of
the enclosure must be contained within a shielded cable and connected to shielded
accessories.
7. Reinstall the strain-relief bar (if removed) and tighten the strain-relief screws. If the
shielded cable is too large to route through the strain-relief hardware, either use multiple,
smaller-diameter cables or remove the top strain-relief bar and add insulation or padding if
necessary to constrain the cable.
8. Replace the cover.
Caution You must install the cover before use.
9. Connect the NI SCB-68 HSDIO to the RIO device using the appropriate cable(s) for the
device.
10. Launch Measurement & Automation Explorer (MAX). In the left panel, expand
Devices and Interfaces to confirm that the DAQ device is recognized, and then configure
device settings.
Mounting the NI SCB-68 HSDIO on a DIN Rail
You can use the NI SCB-68 HSDIO on a desktop or mount it on a standard DIN rail.
The NI 9913 DIN rail mounting kit (part number 783198-01) contains one clip for mounting the
NI SCB-68 HSDIO on a standard 35 mm DIN rail. Fasten the DIN rail clip to the enclosure using
the two flathead #6-32 × 1/4” screws included in the kit with a #2 Phillips screwdriver, as shown
in Figure 3.
Note Do not use the threaded holes on the NI SCB-68 HSDIO for DIN rail
mounting more than five times. Unscrewing and reinstalling the DIN rail clip might
compromise the connection between the DIN rail clip and enclosure.

NI SCB-68 HSDIO Connection Guide & Specifications |© National Instruments |5
Figure 3. NI SCB-68 HSDIO DIN Rail Clip Installation
Clip the chassis onto the DIN rail with the larger lip of the DIN rail clip positioned up, as shown
in Figure 4.
Figure 4. DIN Rail Clip Parts Locator Diagram
Securing the Cover
In most cases, attaching the cover with the integrated magnets is sufficient to secure it. Complete
the following steps if you want to permanently secure the cover to the NI SCB-68 HSDIO base.
1. Using a 3.5 mm (9/64 in.) diameter drill bit, drill two holes through the silkscreened
crosshairs on the label side of the cover. When drilling, place the cover on a flat surface,
such as a drill press, and drill slowly to minimize burrs.
2. Replace the cover on the base, lining up the drill holes with the holes in the enclosure.
3. Screw in two M3 × 6 (4-40 ×5/16) thread-forming Phillips panhead screws, such as
TaptiteTrilobularscrews, with a torque of 1.0-1.2 N · m (8-10 in. · lb). You can purchase
Taptite screws from many vendors.
1 DIN Rail Clip 2 DIN Rail Spring 3 DIN Rail
1
2
3

6|ni.com |NI SCB-68 HSDIO Connection Guide & Specifications
Adding SMB Connectors (Optional)
If your application requires better signal integrity for high-speed signals, you can populate one
or more of the SubMiniature version B (SMB) pads with connectors. Figure 2 shows the
locations of the SMB pads.
Use SMB connectors with 50 Ωimpedance to match the trace impedance of the NI SCB-68
HSDIO. Table 1 lists the recommended SMB connectors.
Special Considerations for HSDIO Connections
National Instruments recommends using 50 Ωcables for all signal connections. If you do not use
50 Ωcables, your application may be affected by signal reflections. You can limit the amplitude
of signal reflections by terminating output lines with Schottky diodes, as shown in Figure 5.
Figure 5. terminating Output Lines with Schottky Diodes
One suitable Schottky diode is the 1N5711, available from several manufacturers.
Note Refer to the help file for your RIO device for information about the number
and functions of available DIO channels on the device. DIO <20..31> and PFI_0 may
not be applicable to your device. DDC CLK OUT/PFI_4 and STROBE/PFI_5 may
function differently on different devices.
Note The NI 6533 and NI 6534 are not compatible with the NI SCB-68 HSDIO.
Table 1. Recommended SMB Connectors
Manufacturer Part Number
Amphenol 903-415J-51P
Applied Engineering Products (AEP) 2009-1511-0050
VCC
RIO Device External Device

NI SCB-68 HSDIO Connection Guide & Specifications |© National Instruments |7
Specifications
The following specifications are typical at 25 °C unless otherwise noted.
Digital I/O
DIO channels .................................................... 32, single-ended
Propagation delay ............................................. 1.1 ns typical
Channel-to-channel skew ................................ 32 ps typical
Trace impedance ............................................... 50 Ωtypical
Control I/O
Control I/O channels......................................... 6, single-ended
Trace impedance ............................................... 50 Ωtypical
Physical Characteristics
Dimensions (including feet) ............................. 14.7 × 14.7 × 3.0 cm (5.8 × 5.8 × 1.2 in.)
Weight............................................................... 650 g (1 lb 7 oz)
I/O connector .................................................... One 68-pin male VHDCI connector
Screw terminals ................................................ 72; all I/O signals are available at
screw terminals
Wire gauge................................................ 14-30 AWG
Torque ....................................................... 0.5-0.6 N · m (4.4-5.3 in. · lb)
SMB pads ......................................................... 38, unpopulated
Through hole pads ............................................ 0.8 to 0.9 mm (in diameter)
Safety Voltages
Connect only voltages that are no greater than 30 Vrms/42 Vpk/60 VDC.
Environmental
Temperature
Operating .................................................. 0 to 70 °C
Storage ...................................................... -20 to 70 °C
Relative humidity
Operating .................................................. 5 to 90% RH, noncondensing
Storage ...................................................... 5 to 90% RH, noncondensing
Pollution Degree ............................................... 2
Maximum altitude............................................. 2,000 m
Indoor use only.

8|ni.com |NI SCB-68 HSDIO Connection Guide & Specifications
Safety
This product meets the requirements of the following standards of safety for electrical equipment
for measurement, control, and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA 61010-1
Note For UL and other safety certifications, refer to the product label or the Online
Product Certification section.
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for electrical equipment
for measurement, control, and laboratory use:
• EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
• EN 55011 (CISPR 11): Group 1, Class A emissions
• AS/NZS CISPR 11: Group 1, Class A emissions
• FCC 47 CFR Part 15B: Class A emissions
• ICES-001: Class A emissions
Note In the United States (per FCC 47 CFR), Class A equipment is intended for use
in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada,
Australia and New Zealand (per CISPR 11) Class A equipment is intended for use
only in heavy-industrial locations.
Note Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical
equipment that does not intentionally generate radio frequency energy for the
treatment of material or inspection/analysis purposes.
Note For EMC declarations and certifications, and additional information, refer to
the Online Product Certification section.
CE Compliance
This product meets the essential requirements of applicable European Directives as follows:
• 2006/95/EC; Low-Voltage Directive (safety)
• 2004/108/EC; Electromagnetic Compatibility Directive (EMC)
Online Product Certification
Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance
information. To obtain product certifications and the DoC for this product, visit ni.com/
certification, search by model number or product line, and click the appropriate link in the
Certification column.

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376137A-01 Oct13
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