National Instruments PXIe-4339 User manual

USER GUIDE AND TERMINAL BLOCK
SPECIFICATIONS
NI PXIe-4339 and RM-4339
NI PXIe-4339, 8 Ch, 24-Bit, Bridge and Voltage Input Module,
RM-4339 Rack-Mount Terminal Block
This document explains how to install, configure, and set up the NI PXIe-4339 SC Express
universal bridge module and RM-4339 rack-mount terminal block. Driver support for the
NI PXIe-4339 was first available in NI-DAQmx 14.2. Driver support for the RM-4339 was first
available in NI-DAQmx 14.5. For the list of devices supported by a specific release, refer to the
NI-DAQmx Readme, available on the version-specific download page or installation media.
Note The keying of these terminal blocks prevents them from connecting to other
modules that could be damaged by the voltage present on the terminal block.
However, you should only use these terminal blocks with their supported modules.
Contents
Electromagnetic Compatibility Guidelines .............................................................................. 2
What You Need to Get Started ................................................................................................. 3
Installation ................................................................................................................................ 4
Install the Software........................................................................................................... 4
Unpack and Install the Module......................................................................................... 4
Unpack and Install the Rack-Mount Terminal Block, Chassis, and Cables..................... 6
RM-4339 Positions ................................................................................................................... 10
Shared Resources.............................................................................................................. 10
CAL IN ..................................................................................................................... 11
CAL BIAS ................................................................................................................ 11
In-Situ Calibration .................................................................................................... 11
EXT PWR................................................................................................................. 13
Excitation/External Power........................................................................................ 13
Position Resources............................................................................................................ 14
RJ50 .......................................................................................................................... 14
Status LED................................................................................................................ 15
PFI0 .......................................................................................................................... 15
External Shunt .......................................................................................................... 16
AO 0..7 ..................................................................................................................... 18
Position Switching.................................................................................................... 19

2|ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
Quarter-Bridge Completion and Shunt Calibration .................................................. 21
Shunt Resistors .........................................................................................................21
Confirm SC Express Module Recognition .......................................................................22
Run Test Panels ................................................................................................................24
Take an NI-DAQmx Measurement...................................................................................24
NI-DAQmx Channels and Tasks .............................................................................. 24
Configure a Task Using the DAQ Assistant in MAX ..............................................24
Use Your NI SC Express Device in an Application .........................................................25
Programming Examples............................................................................................ 25
Removal .................................................................................................................................... 26
Terminal Block and Cables Removal ............................................................................... 26
Module Removal...............................................................................................................26
Create a Simulated Device........................................................................................................ 27
More Information...................................................................................................................... 28
Troubleshooting ................................................................................................................ 28
Specifications (RM-4339).........................................................................................................28
Electrical ...........................................................................................................................28
Input Characteristics ......................................................................................................... 28
Bridge Completion............................................................................................................ 29
External Power (EXT PWR)............................................................................................. 29
Mechanical........................................................................................................................ 29
Connectors ................................................................................................................ 30
Physical ............................................................................................................................. 30
Environmental Specifications ........................................................................................... 31
Operating Environment............................................................................................. 31
Storage Environment ........................................................................................................31
Shock and Vibration .........................................................................................................31
Safety ................................................................................................................................32
Safety Standards ...............................................................................................................32
Electromagnetic Compatibility ................................................................................................. 32
CE Compliance ................................................................................................................. 33
Online Product Certification............................................................................................. 33
Environmental Management............................................................................................. 33
World Wide Support and Services............................................................................................34
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 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.

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |3
Furthermore, any 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.
What You Need to Get Started
To set up and use the RM-4339 rack-mount terminal block with the NI PXIe-4339 module, you
need the following items:
• Hardware
– RM-4339 rack-mount terminal block
– NI PXIe-4339 module
–PXIechassis
– SCAL-4339 Shunt Calibration Accessory (optional)
– 19 in. rack to accommodate the RM-4339 and PXIe chassis
– Four screws (not supplied by NI) suitable for your application to mount the RM-4339
in the rack
– SH96-96-2 cable and included standoffs, which are used to mount the cable to the
module
– Rack-mount kit (as required for your application) for mounting the PXIe chassis in the
19 in. rack
– Cabling and sensors as required for your application
• Tools
– Phillips-head screwdrivers as required by your application
– Flathead screwdrivers as required by your application
– Long-nose pliers
– Wire cutter
– Wire insulation stripper
– RJ50 terminal crimper
• Documentation
– NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
–Read Me First: Safety and Electromagnetic Compatibility
–NI PXIe-4339 User Manual
– PXIe chassis user manual
You can download needed documents from ni.com/manuals.

4|ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
Installation
Install the Software
Note You must be an administrator to install NI software and devices on your
computer.
Ensure that the following software is installed before installing the SC Express hardware:
1. Your application software, such as LabVIEW, LabWindows™/CVI™or .NET.
2. NI-DAQmx—NI PXIe-4339 modules were first supported in NI-DAQmx 14.2. RM-4339
terminal blocks were first supported in NI-DAQmx 14.5.
Note For detailed NI software version support, refer to the NI-DAQmx Readme.
Back up any applications before upgrading software or modifying the application.
Unpack and Install the Module
Remove the packaging and inspect the module. Contact NI if the module is damaged. Do not
install a damaged module.
Caution The module is static sensitive. Always properly ground yourself and the
equipment when handling or connecting to the module.
Complete the following steps to install the NI SC Express module while referring to Figures 1
and 2:
Note To maintain forced air cooling in the PXIe system, refer to the Maintain
Forced-Air Cooling document.
1. Make sure the chassis is powered off.
2. Connect the power cord to your chassis and then plug it into the power supply receptacle
before installing the NI PXIe-4339. The power cord grounds the chassis and protects it
from electrical damage while you install the module.
Caution To protect yourself, the chassis, and the NI PXIe-4339 from electrical
hazards, leave the chassis powered off until you complete the NI PXIe-4339 module
installation.

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |5
3. Identify a supported PXI Express slot in the chassis. SC Express devices can be placed only
in PXI Express Peripheral slots, PXI Express Hybrid Peripheral slots, and PXI Express
System Timing slots. Refer to the chassis documentation for details.
Figure 1. Symbols for PXI Express/PXI Express Hybrid/PXI Slots
4. Remove the filler panel, and touch any metal part of the chassis to discharge static
electricity.
5. Place the module edges into the module guides at the top and bottom of the slot.
Caution When installing the module, make sure both edges are positioned inside
the guides and that the module components do not come into contact with adjacent
modules.
6. Slide the module along the guides until it reaches the rear connector then seat the module
by pushing the front panel until it is flush with the front panel of the chassis.
7. Secure the module to the chassis using the front-panel captive screws, shown in Figure 2.
Tighten the screws to 0.31 N · m (2.7 lb · in.).
Figure 2. Installing NI PXIe-4339 Modules
1 PXI Express System Controller Slot
2 PXI Peripheral Slot
3 PXI Express Hybrid Peripheral Slot
4 PXI Express System Timing Slot
1CaptiveScrews
NI PXIe-1062Q
1 2 34
NI PXIe-1062Q
COOLING CLEARANCE AND FANFILTER MAINTENANCE REQUIRED. SEE MANUAL.
1

6|ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
Unpack and Install the Rack-Mount Terminal Block,
Chassis, and Cables
Remove the packaging and inspect the terminal block, chassis, and cables. Contact NI if there is
any damage. Do not install a damaged product.
Caution The module and terminal block are static sensitive. Always properly
ground yourself and the equipment when handling or connecting to the module and
terminal block.
Caution Refer to the Read Me First: Safety and Electromagnetic Compatibility
document before removing equipment covers or connecting or disconnecting any
signal wires.
Caution Do not supply hazardous voltages (>30 Vrms/42.4 Vpk/60 VDC) to the
terminal block.
Caution To ensure the EMC performance specified for the connected
NI PXIe-4339 module, operate this product only with shielded RJ50 and BNC cables.
Note The chassis can be powered on or off when connecting the terminal block.
To install the rack-mount terminal block into the rack, complete the following steps while
referring to Figure 3.
1. Place the RM-4339 in the desired position.
2. Install and tighten the four rack-mounting screws.

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |7
If the chassis is not already installed in the rack, complete the following steps:
1. Attach the PXIe chassis rack-mount hardware to the PXIe chassis. Refer to your
rack-mount kit installation guide for more details.
2. Mount the PXIe chassis in the rack in the desired position. Refer to your rack-mount kit
installation guide for more details.
Figure 3. RM-4339 Installation and Front Connections
1 Rack-Mounting Screws (4)
2 RM-4339 Rack-Mount Terminal Block
3 PFI BNC Cable
4 Wide Bandwidth Analog Output 9-Pin D-SUB Cable*
5 SCAL-4339 Shunt Calibration Accessory
6 RJ50 (8) Cable Connectors
* Refer to the NI PXIe-4339 User Manual for more information regarding wide bandwidth analog output.
CH1 CH2 CH3
CH0
C
NATIONAL
INST RM
UENTS
RM-4339
Rack Mount
Connectivity for
PXIe-4339
CH1 CH2 CH3
!
CH0
AB
CH1 CH2 CH3
CH0
EXTERNAL SHUNT EXTERNAL SHUNT EXTERNAL SHUNT
1
2
1
5
6
3
4

8|ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
To install the cables in any of positions A, B, and/or C, complete the following steps while
referring to Figures 3 and 4.
1. Connect the RJ50 cable connectors to the appropriate RJ50 connector receptacles for the
position being used. Refer to the RJ50 section for more information.
2. Make any of the following connections as needed for your application:
• Connect the BNC cable to the PFI0 receptacle.
• Connect the SCAL-4339 to the 25-pin D-SUB receptacle.
• Connect the 9-pin D-SUB connector to the 9-pin D-SUB wide bandwidth analog
output receptacle.
• Connect the external power source.
a. Remove the 2-pin EXT PWR connector from the RM-4339.
b. Install the external power wires. Refer to the EXT PWR section for more
information.
c. Install the 2-pin COMBICON cable into the RM-4339.
• Connect calibration input.
a. Remove the 2-pin COMBICON connector from the RM-4339.
b. Install the calibrator input wires. Refer to the In-Situ Calibration section for more
information.
c. Install the 2-pin COMBICON cable into the RM-4339.
• Connect the calibration bias resistors.
a. Remove the 4-pin COMBICON connector from the RM-4339.
b. Install the bias resistors. Refer to the CAL IN section for more information.
c. Install the 4-pin COMBICON cable into the RM-4339.
3. Connect the chassis ground wire to the chassis ground screw.

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |9
Figure 4. Cables, Resistor, and Standoff Installation
4. Screw the two standoffs into the NI PXIe-4339 module. Tighten the standoffs to 1.30 N · m
(11.5lb·in.).
5. Connect the male end of the SH96-96-2 cable to the RM-4339 and tighten the two jack
screws to 0.90 N · m (8.0 lb · in.).
Note For safety purposes and to prevent damage to equipment when high voltages
are present, the SH96-96-2 cable is keyed to prevent connection between
incompatible terminal blocks, modules, and/or cables.
1 RM-4339 Rack-Mount Terminal Block
2 PXIe Chassis
3 NI PXIe-4339 Module
4 Standoffs (2)
5 Jack Screws (2x)
6 SH96-96-2 Cable RM-4339 Connector Plug
(female)
7 PXIe Controller
8 Calibration Input 2-Position COMBICON Cable
9 Calibration Bias Resistor Connector 4-position
COMBICON
10 Bias Resistor
11 RM-4339 Connector Receptacle
12 Jack Screws (2x)
13 SH96-96-2 Cable RM-4339 Connector Plug (male)
14 Chassis Ground Screw
15 External Power 2-Position COMBICON Cable
16 Chassis Ground Cable
NI PXIe-1062Q
COOLING CLEARANCEAND FANFILTER MAINTENANCEREQUIRED. SEE MANUAL.COOLING CLEARANCE AND FANFILTERMAINTENANCEREQUIRED. SEE MANUAL.
2
4
6
5
5
3
7
13
12
11
1
16
15
8
14
12
EXT PWR
+—6-28VDC
2.4A MAX
BA
RB1 RB2
+—
CAL IN
+—
+
—
10V
MAX
9
10

10 |ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
6. Connect the female end of the SH96-96-2 cable to the NI PXIe-4339 and tighten the
two jack screws to 0.90N·m(8.0lb·in.).
Note For information about sensors, go to ni.com/sensors.
7. Power on the PXIe chassis if it is powered off.
RM-4339 Positions
The RM-4339 is divided into three positions A, B, and C. You can connect three separate
NI PXIe-4339 modules simultaneously to the RM-4339; one to each position. Each of the three
positions is independently controlled and powered by the NI PXIe-4339 to which it connects.
There are no constraints on how many or which positions are used. On the rear side of the
RM-4339, the three 96-pin DIN connectors are labeled A, B, and C. These correspond to the
three connector sets on the front of the RM-4339, which are also labeled A, B, and C. Connectors
within one of these positions connect to the same NI PXIe-4339 module. Figure 5 shows the
location of the connectors on the front and rear of the RM-4339.
Figure 5. RM-4339 Front and Rear View
Shared Resources
The CAL IN, BIAS RESISTOR and EXT PWR connectors on the rear of the RM-4339 are
shared by positions A, B, and C.
1 RM-4339 Product Name
2 RJ50 Connector (8 per position)
3 LED Status Indicator (1 per position)
4 PFI0 (1 per position)
5 Wide Bandwidth AO 9-Pin D-SUB (1 per position)
6 Mounting Flanges (2x)
7 External Shunt 25-Pin D-SUB (1 per position)
8 Chassis Ground
9 External Power 2-position COMBICON
10 Serial Number Label
11 Calibration Bias Resistor Connector 4-position
COMBICON
12 Calibration Input 2-position COMBICON
13 96-Pin DIN Cable Connector (1 per position)
A
NATIONAL
INSTR M
UENTS
RM-4339
Rack Mount
Connectivity for
PXIe-4339
!
CH0 CH1 CH2 CH3
CH4 CH5 CH6 CH7
EXTERNAL SHUNT
STATU SPFI0 AO0-7
CH0 CH1 CH2 CH3
CH4 CH5 CH6 CH7
EXTERNAL SHUNT
STAT USPFI0 AO0-7
CH0 CH1 CH2 CH3
CH4 CH5 CH6 CH7
EXTERNAL SHUNT
STATU SPFI0 AO0-7
21 3 4 5 6 7 8 910 11 12 13
141516 17 18 19 20 21222324 25
21 3 4 567 8 910 11 12 13
14 15 16 17 18 19 20 212223 24 25
2
1 3 4 5 6 7 8 9 10 11 12 13
1415 16 17 18 19 20 2122 23 24 25
41 5
7
2
1 3 4 5
6 7 8 9
2
1 3 4 5
6 7 8 9
2
1 3 4 5
6 7 8 9
CBA
RB1 RB2CAL IN
!
10V
MAX
+
_
_
+
_
+
EXT PWR
_
+
6-28 VDC
2.4A MAX
910 11 12
13
Front
Rear
23
8
6
BC

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |11
CAL IN
The CAL IN input connector on the rear of the RM-4339 allows you to connect a voltage
reference that can be internally routed to the analog input of each channel (AI+, AI-) on the
NI PXIe-4339. You can independently configure each channel in any position of the RM-4339
to connect to CAL IN using the Calibration API within NI-DAQmx.
The calibration source voltage is connected to the CAL IN+ and CAL IN- terminals as shown in
Table 1.
CAL BIAS
You can use the connector labeled RB1 and RB2 on the rear of the RM-4339 to reference the
CAL± input to analog ground (AIGND). For flexibility, access to both CAL+ and CAL- is
provided. The CAL BIAS+ pin connects to CAL+ and the CAL BIAS- pin connects to CAL-.
You can reference a floating voltage to AIGND by populating the RB1 position. To provide a
differential voltage that is referenced to AIGND with zero common mode, populate both RB1
and RB2 with equal value resistors. When choosing resistor values, consider the output
impedance of the external reference voltage source.
In-Situ Calibration
The RM-4339 provides the ability to perform in-situ calibration of input channels referenced to
an external traceable voltage source that you can use to connect to the CAL IN connector. In-situ
calibration offers a means to determine measurement errors and uncertainties compared to a
traceable standard. The calibration data can be used to compensate for changes in the hardware,
Table 1. Calibration Input Connector Pin Assignments
Calibration Input Pin
Diagram Pin Signal Name Signal Description
1CAL IN- Calibration input negative
2CAL IN+ Calibration input positive
Table 2. Bias Resistor Connector
Bias Resistor Connector Pin Signal Name Signal Description
1CAL BIAS- RB2 calibration bias resistor
for CAL-
2AIGND Analog input ground
3AIGND Analog input ground
4CAL BIAS+ RB1 calibration bias resistor
for CAL+
2 1
2 134

12 |ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
resulting in a more accurate measurement. In-situ calibration can be performed before and after
test acquisition, or on a periodic schedule, to ensure data validity without physically
disconnecting any inputs from the RM-4339.
During in-situ calibration, the input channels are disconnected internally from the RJ50
connectors and connected to a calibration bus that is driven by the calibration voltage reference
connected to CAL IN±. Through measurement of these channels, any NI PXIe-4339 circuitry
drift since the last full calibration will be available through measurement of these channels.
In-situ calibration performs a verification, but not an adjustment. Therefore, the results from
in-situ calibration will not rewrite the calibration coefficients to the NI PXIe-4339. Instead these
results can be applied to the test setup, test results, or to the NI PXIe-4339 programmatically.
To assist you with starting development of an application with in-situ calibration, an example
program is available for download from the NI Community. Refer to ni.com/info and enter
Info Code exsueg.
For in-situ calibration, the following connection options are supported through NI-DAQmx as
shown in Table 3.
Table 3. Per-Channel Connection Options Configurable Through NI-DAQmx Connect
SC Express Calibration Accessory Channels API
Connection Option Purpose
_cal_channel Connect a voltage reference provided through CAL IN to the
analog input of each channel.
_remote_sense_
floating
Disconnect RS+/RS-. This option is used during in-situ
calibration of a ratio mode channel. It is used to disconnect the
remote sense of the NI PXIe-4339 module from a connected
bridge sensor. A gain error in the in-situ calibration of a ratio
mode channel will result if remote sense is not disconnected. The
magnitude of the gain error is proportional to the ratio of the lead
wire resistance and the connected sensors resistance.
_disconnect_
excitation
Disconnect EX+/EX-. This option is used during in-situ
calibration of a ratio mode channel. It is used to disconnect the
excitation voltage of the NI PXIe-4339 module from a connected
bridge sensor. Disconnecting the excitation from a connected
sensor allows ratio mode in-situ calibration to be conducted with
all the supported excitation voltage settings regardless of the load
connected to a channels excitation terminals.
Note: In-situ calibration of ratio mode channels requires the use of paired channels. Refer to
the verification section of the NI PXIe-4339 Calibration Procedure for more information
about configuring the NI PXIe-4339 for ratio mode calibration.

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |13
EXT PWR
The external power input connector on the rear of the RM-4339 allows you to connect a positive
voltage supply for use in powering powered sensors. The external voltage source can be either
ground referenced or floating. The EXT PWR- input is connected to the ground of the RM-4339.
Do not apply a ground referenced voltage to the EXT PWR- input; doing so can result in
excessive current conducted through the ground of the RM-4339. The RM-4339 internally
routes the voltage connected to EXT PWR+ to positions A, B, and C. There is an enable switch
per position followed by a positive temperature coefficient (PTC) resistor for protection against
short-circuit faults. The EXT PWR per-position enable switches are off by default and are
automatically enabled by NI-DAQmx when a channel is configured to use external excitation.
Refer to Table 4 for signal names and descriptions.
After connecting EXT PWR to a powered sensor, a short time delay may need to be introduced
in the measurement application to allow the sensor to warm up. Refer to your powered sensor
documentation for any power up settling requirements.
Excitation/External Power
Each channel includes switching that allows EXT PWR to be connected to the EX± pins of each
RJ50 connector. When connected, EX+ is connected to EXT PWR+ and EX- is connected to the
ground of the RM-4339. You can configure each channel independently to either connect to
EXT PWR, to the excitation voltage provided by the NI PXIe-4339, or to not be connected to
any reference (floating).
The EX± pins of each RJ50 connector are connected to the corresponding NI PXIe-4339
excitation channel by default and are only connected to the EXT PWR while a NI-DAQmx task
is running with the channel configured to use the EXT PWR resource.
When the task has finished running, EX± returns to the default position.
Current Fault Protection Reset
The positive temperature coefficient (PTC) resistors used for short circuit fault protection trip
by undergoing a large, abrupt change in resistance in response to an overcurrent. The tripped
state of the PTC is a latched state that is sustained by a small self-heating current. To reset the
PTC, the fault must be removed and all the current through the PTC must be momentarily
interrupted from the position (A, B, C) that the faulted channel was part of. After removal of the
Table 4. External Power Connector Pin Assignments
External Power Connector
Pin Diagram Pin Signal Name Signal Description
1EXT PWR-
(GND)
Ground
2EXT PWR+ External power
2 1

14 |ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
fault, interruption of the current can be done by programmatically disconnecting EXT PWR
from the appropriate position by stopping the tasks that are using EXT PWR+. The following
three steps summarize the steps that should be taken to reset a tripped PTC:
1. Remove the short-circuit fault from the affected channel.
2. Programmatically disconnect EXT PWR from the position of which the faulted channel
was a part.
3. After 10 seconds, programmatically reconnect EXT PWR.
Position Resources
This section describes the position resources on both the front and rear of the RM-4339. Figure 5
shows the locations of these resources.
RJ50
Refer to Table 5 for signal names and descriptions, and the correlation to the pin numbers of the
RJ50 (10p10c) modular plug. Refer to Figure 8 for default switch positions.

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |15
Table 5. RJ50 Connector Pin Assignments
RJ50* (10p10c) Modular
Plug Pin Number
Diagram Pin
Signal
Name Signal Description
1SCA Shunt calibration A circuit connection. Pin 1 and pin
10 form a pair of terminals used to provide
connectivity to a shunt calibration resistor. The source
of the resistor can be the SCA built-in resistor or a user
provided resistor installed in the SCAL-4339
accessory.
2AI+ Positive input signal—connected to the AI+ input of
the NI PXIe-4339 or disconnected when the channel is
connected to CAL_IN+.
3AI- Negative input signal—connected to the AI- input of
the NI PXIe-4339 or disconnected when the channel is
connected to CAL_IN-.
4RS+ Positive remote sense signal—connected to the RS+
input of the NI PXIe-4339. This pin can also be
disconnected internally on the RM-4339.
5QTR/
RS-
Quarter-bridge completion—negative remote sense
signal—when using the quarter-bridge mode of the
RM-4339 this pin connects to the quarter-bridge
completion resistor on the RM-4339. In other
measurement modes it connects to the RS- input of the
NI PXIE-4339. This pin can also be disconnected
internally on the RM-4339.
6EX+ Positive excitation—voltage source of the
NI PXIe-4339 (default) or an external voltage source
for use with powered sensors. This pin can also be
disconnected internally on the RM-4339.
7EX- Negative excitation—voltage source of the
NI PXIe-4339 (default) or ground when configured
for external power. This pin can also be disconnected
internally on the RM-4339.
8T+ TEDS—sensor digital communication line.
9T- Negative reference for TEDS communication.
Internally connected to digital ground of the
RM-4339.
10 SCA Shunt calibration A circuit connection. Paired with pin
1 to provide connectivity to shunt calibration resistors.
* NI does not recommend using an RJ45 cable with the RM-4339 as it can physically damage pins 1 and
10 on the RJ50 connector.
Note: Refer to Figure 8 for default positions.
Pin 1
Pin 10

16 |ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
Status LED
The green status LED, when lit, indicates a position is connected to a powered NI PXIe-4339
module. The location of the Status LED is shown in Figure 5.
PFI0
The PFI0 connector provides a female BNC connection to the PFI trigger line of the
NI PXIe-4339. The RM-4339 passes this signal directly through. Refer to the NI PXIe-4339
User Manual for more information about using the PFI trigger line. Refer to Table 6 for signal
names and descriptions.
External Shunt
The 25-pin D-SUB connector is used to attach the optional SCAL-4339 Shunt Calibration
Accessory.
The SCAL-4339 Shunt Calibration Accessory allows a user to provide an external shunt
calibration resistor in place of the built-in 100 kΩSCA shunt calibration resistor. Through
software configuration, the user provided resistors on the SCAL-4339 Shunt Calibration
Accessory can be connected to the SCA terminal pairs of the RJ50 connectors. Eight pairs of
through hole sockets are provided on the SCAL-4339 Shunt Calibration Accessory for installing
the user provided resistors. Figure 6 illustrates opening the SCAL-4339 and installing resistors.
Table 6. BNC Connector Pin Assignments
BNC PFI0 Connector Pin
Diagram Pin Signal Name Signal Description
1PFI0 PFI input
2DGND Digital ground
1
2

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |17
Figure 6. Opening the SCAL-4339 and Inserting Shunt Calibration Resistor
Refer to the Mechanical section for information about the required resistor lead diameter,
spacing, and depth.
1TopCover
2 Captive Screws (4x)
3 Shunt Calibration Resistor (8x user supplied)
4 25-Pin D-SUB Connector
5 SCAL-4339 Case
4
3
5
1
2

18 |ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
The socket pairs are labeled RSCX, where Xrepresents the channel number. For example, RSC0
corresponds to channel 0. Refer to Figure 7 for a detailed illustration.
Figure 7. SCAL-4339 Resistor Locations
The use of the SCAL-4339 Shunt Calibration Accessory does not prevent the built-in SCA
resistor on the RM-4339 from being used, however the built-in resistor and the user provided
resistor cannot be selected simultaneously.
1 Shunt Resistor—User Supplied (8x) 2 Channel Names (RSCX)
FOR PATENTS: NI.COM/PATENTS
UL94V-0
RSC4
RSC3
RSC5 RSC6 RSC7
RSC0 RSC1 RSC2
RM-4339
Shunt CAL
Accessory
1
2

NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications |© National Instruments |19
Refer to Table 7 for signal names and descriptions.
AO 0..7
The AO 0..7 connector is a 9 pin D-SUB connector that allows connection to the 8 wide
bandwidth analog output signals generated by the NI PXIe-4339. The RM-4339 passes these
signals directly through the terminal block. Refer to Table 8 for signal names and descriptions.
Table 7. 25-Pin D-SUB External Shunt Connector Pin Assignments
25-Pin D-SUB External Shunt
Pin Number Diagram
Pin
Pairings
Signal
Name Signal Description
1, 14 SCA0 Shunt calibration A channel 0
2, 15 SCA1 Shunt calibration A channel 1
3, 16 SCA2 Shunt calibration A channel 2
4, 17 SCA3 Shunt calibration A channel 3
5, 18 SCA4 Shunt calibration A channel 4
6, 19 SCA5 Shunt calibration A channel 5
7, 20 SCA6 Shunt calibration A channel 6
8, 21 SCA7 Shunt calibration A channel 7
9..13,
22..25
NC No connect
Table 8. 9-Pin D-SUB Connector Pin Assignments
9-Pin D-SUB Analog Output
Pin Number Diagram Pin Signal Name Signal Description
1AO0+ Analog output channel 0
2AO1+ Analog output channel 1
3AO2+ Analog output channel 2
4AO3+ Analog output channel 3
5AO4+ Analog output channel 4
6AO5+ Analog output channel 5
7AO6+ Analog output channel 6
8AO7+ Analog output channel 7
9AOGND Analog output ground
21 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
21 345
6789

20 |ni.com |NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
Position Switching
The RM-4339 provides software controlled switching to allow you to programmatically control
the additional features the RM-4339 adds to the NI PXIe-4339. Each of the three positions is
independently controlled by its corresponding NI PXIe-4339. Within a single position, each
channel can be configured independently through NI-DAQmx. Figure 8 illustrates the switching
provided for each channel.