National Instruments 9361 User manual

GETTING STARTED GUIDE
NI 9361
8 Counter DI, 0 V to 5 V Differential/0 V to 24 V
Single-Ended, 32 Bit, 102.4 kHz

This document explains how to connect to the NI 9361.
Note Before you begin, complete the software and
hardware installation procedures in your chassis
documentation.
Note The guidelines in this document are specific to
the NI 9361. The other components in the system might
not meet the same safety ratings. Refer to the
documentation for each component in the system to
determine the safety and EMC ratings for the entire
system.
Safety Guidelines
Operate the NI 9361 only as described in this document.
Caution Do not operate the NI 9361 in a manner not
specified in this document. Product misuse can result in
a hazard. You can compromise the safety protection
built into the product if the product is damaged in any
way. If the product is damaged, return it to NI for
repair.
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Safety Voltages
Connect only voltages that are within the following limits:
Isolation
Channel-to-channel None
Channel-to-earth ground (up to 3000 m)
Continuous 60 VDC, Measurement
Category I
Withstand 1,000 Vrms, verified by a 5 s
dielectric withstand test
Vsup inputs-to-earth ground (up to 3000 m)
Continuous 60 VDC, Measurement
Category I
Withstand 1,000 Vrms, verified by a 5 s
dielectric withstand test
NI 9361 Getting Started Guide | © National Instruments | 3

Channel-to-earth ground (up to 5000 m)
Continuous 60 VDC, Measurement
Category I
Withstand 860 Vrms, verified by a 5 s
dielectric withstand test
Vsup inputs-to-earth ground (up to 5000 m)
Continuous 60 VDC, Measurement
Category I
Withstand 860 Vrms, verified by a 5 s
dielectric withstand test
Measurement Category I is for measurements performed on
circuits not directly connected to the electrical distribution system
referred to as MAINS voltage. MAINS is a hazardous live
electrical supply system that powers equipment. This category is
for measurements of voltages from specially protected secondary
circuits. Such voltage measurements include signal levels, special
equipment, limited-energy parts of equipment, circuits powered
by regulated low-voltage sources, and electronics.
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Caution Do not connect the NI 9361 to signals or use
for measurements within Measurement Categories II,
III, or IV.
Note Measurement Categories CAT I and CAT O are
equivalent. These test and measurement circuits are not
intended for direct connection to the MAINS building
installations of Measurement Categories CAT II,
CAT III, or CAT IV.
Safety Guidelines for Hazardous Locations
The NI 9361 is suitable for use in Class I, Division 2, Groups A,
B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4
and Ex nA IIC T4 hazardous locations; and nonhazardous
locations only. Follow these guidelines if you are installing the
NI 9361 in a potentially explosive environment. Not following
these guidelines may result in serious injury or death.
Caution Do not disconnect I/O-side wires or
connectors unless power has been switched off or the
area is known to be nonhazardous.
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Caution Do not remove modules unless power has
been switched off or the area is known to be
nonhazardous.
Caution Substitution of components may impair
suitability for Class I, Division 2.
Caution For Division 2 and Zone 2 applications,
install the system in an enclosure rated to at least IP54
as defined by IEC/EN 60079-15.
Special Conditions for Hazardous Locations Use
in Europe and Internationally
The NI 9361 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO Certificate No. 12 ATEX 1202658X and is
IECEx UL 14.0089X certified. Each NI 9361 is marked II 3G
and is suitable for use in Zone 2 hazardous locations, in ambient
temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9361
in Gas Group IIC hazardous locations, you must use the device in
an NI chassis that has been evaluated as Ex nC IIC T4, Ex IIC
T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.
Caution You must make sure that transient
disturbances do not exceed 140% of the rated voltage.
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Caution The system shall only be used in an area of
not more than Pollution Degree 2, as defined in
IEC 60664-1.
Caution The system shall be mounted in an
ATEX/IECEx-certified enclosure with a minimum
ingress protection rating of at least IP54 as defined in
IEC/EN 60079-15.
Caution The enclosure must have a door or cover
accessible only by the use of a tool.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory
requirements and limits for electromagnetic compatibility (EMC)
stated in the product specifications. These requirements and
limits provide reasonable protection against harmful interference
when the product is operated in the intended operational
electromagnetic environment.
This product is intended for use in industrial locations. However,
harmful interference may occur in some installations, when the
product is connected to a peripheral device or test object, or if the
NI 9361 Getting Started Guide | © National Instruments | 7

product is used in residential or commercial areas. To minimize
interference with radio and television reception and prevent
unacceptable performance degradation, install and use this
product in strict accordance with the instructions in the product
documentation.
Furthermore, any changes or modifications to the product not
expressly approved by National Instruments could void your
authority to operate it under your local regulatory rules.
Caution To ensure the specified EMC performance,
operate this product only with shielded cables and
accessories.
Caution To ensure the specified EMC performance,
the length of all I/O cables must be no longer than 30 m
(100 ft).
Special Conditions for Marine Applications
Some products are Lloyd’s Register (LR) Type Approved for
marine (shipboard) applications. To verify Lloyd’s Register
certification for a product, visit ni.com/certification and search
for the LR certificate, or look for the Lloyd’s Register mark on
the product.
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Caution In order to meet the EMC requirements for
marine applications, install the product in a shielded
enclosure with shielded and/or filtered power and
input/output ports. In addition, take precautions when
designing, selecting, and installing measurement probes
and cables to ensure that the desired EMC performance
is attained.
Preparing the Environment
Ensure that the environment in which you are using the NI 9361
meets the following specifications.
Operating temperature
(IEC 60068-2-1, IEC 60068-2-2)
-40 °C to 70 °C
Operating humidity
(IEC 60068-2-78)
10% RH to 90% RH,
noncondensing
Pollution Degree 2
Maximum altitude 5,000 m
Indoor use only.
NI 9361 Getting Started Guide | © National Instruments | 9

Note Refer to the device datasheet on ni.com/manuals
for complete specifications.
Connecting the NI 9361
The NI 9361 provides connections for eight digital input channels
for the embedded counters.
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Figure 1. NI 9361 Pinout
DI3-
COM
DI2-
COM
DI6-
COM
DI7-
COM
DI0-
NC
DI1-
COM
DI5-
COM
COM
DI4-
COM
COM
DI3+
Vout
DI2+
Vout
Vout
DI6+
DI7+
Vout
DI0+
Vsup
DI1+
Vout
Vout
DI5+
Vout
DI4+
NC
Vout
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
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NI 9361 Signals
Table 1. Signal Descriptions
Signal Description
COM Common reference connection to isolated ground
DI+ Digital input signal connection for singled-ended
measurements and positive digital input signal connection for
differential measurements
DI- Negative digital input signal connection for differential
measurements
NC No connection
Vout Voltage supply output connection
Vsup Voltage supply input connection
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Connecting an External Power Supply
You can optionally connect an external power supply to the
NI 9361 to provide current for the devices that you connect to the
module. Install a 2 A maximum, fast-acting fuse between the
external power supply and the Vsup terminal.
Note Refer to the NI 9361 Datasheet on ni.com/
manuals for more information about the Vsup pins.
Caution Do not remove or install modules if the
connected external power supply is powered on.
NI 9361 Getting Started Guide | © National Instruments | 13

Figure 2. Connecting an External Power Supply
Vsup
COM
Vout
2 A
Max
Vin
GND
External
Power
Supply
NI 9361
+
–
COM
External
Device
Connecting Single-Ended Devices
You can connect single-ended devices, such as TTL or CMOS to
the NI 9361. For single-ended connections, connect the device
out to the DI+ terminal on the NI 9361. Do not connect the DI-
terminal on the NI 9361 for single-ended connections.
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Figure 3. Connecting a Single-Ended Device
Vsup
COM
Vout
2 A
Max
Vin
GND
Single-Ended
Device
External
Power
Supply
NI 9361
OUT DI0+
+
–
COM
DI0–
Connecting Single-Ended Devices with Open
Collector Outputs
You can connect a device with open collector or open drain
outputs to the NI 9361.
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Figure 4. Connecting a Single-Ended Device with Open Collector
Outputs
Vsup
COM
Vout
2 A
max
Vin
GND
Open
Collector
Device
External
Power
Supply
NI 9361
OUT DI0+
+
–
COM
DI0–
+5 V
An open collector device does not actively drive the signal high
and relies on an external pull-up. The NI 9361 provides a 5 V
pull-up on each DI+ pin that can be enabled individually to pull
the signal high.
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Connecting Differential Devices
You can connect differential devices to the NI 9361. For
differential connections, connect the positive device out to the
DI+ terminal on the NI 9361 and the negative device out to the
DI- terminal on the NI 9361.
NI 9361 Getting Started Guide | © National Instruments | 17

Figure 5. Connecting a Differential Device
2 A
Max Vsup
COM
Vout
Vin
GND
Differential
Device
External
Power
Supply
NI 9361
+
–
DI0+
DI0–
+
–
COM
The NI 9361 measures the difference between the DI+ and DI-
terminals to determine if that difference is greater or less than the
digital logic levels. If the difference between the terminals is
within the input high range, the channel registers as high. If the
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difference between the terminals is within the input low range,
the channel registers as low.
Note Refer to the NI 9361 Datasheet on ni.com/
manuals for more information about digital logic
levels.
Incremental Encoders
Incremental encoders typically have channel A and channel B.
By monitoring both the number of pulses and the relative phase
of channels A and B, you can track both the position and
direction of rotation. Some encoders have a third channel,
channel Z, which is also referred to as the index channel. A high
level on channel Z causes the counter to be reloaded with a
specific value in a specific phase of a cycle.
Connecting Single-Ended Incremental Encoders
You can connect single-ended incremental encoders to the
NI 9361.
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