USER MANUAL
SLSC-12251 and SLSC-12252
Fault Insertion Unit, 16 CH, 8 Amps and 8 CH, 30 Amps
SLSC-12251
16 Ch FIU
100 Vpk, 8 Arms MAX
J1: DUT (0-15) J2: LOAD (0-15)
SLSC-12252
8 Ch FIU
100 Vpk, 30 Arms MAX
J1: DUT (0-7) J2: LOAD (0-7)
Contents
Overview...................................................................................................................................2
Safety Guidelines...................................................................................................................... 3
Safety Voltages..................................................................................................................3
EMC Guidelines........................................................................................................................4
Environmental Characteristics.................................................................................................. 4
Installing the SLSC-12251/12252 and RTI-12306................................................................... 5
Getting Started with Software...................................................................................................6
I/O Organization........................................................................................................................6
Properties.................................................................................................................................. 8
Fault Monitoring and Identification........................................................................................ 11
Measuring the Current............................................................................................................ 12
Measuring the Temperature.....................................................................................................12
Switch Control........................................................................................................................ 13
Calibration...............................................................................................................................13
Driving Inductive Loads......................................................................................................... 14
Pinouts.....................................................................................................................................16
Accessories..............................................................................................................................18
RTI-12306....................................................................................................................... 18
Terminal Blocks.............................................................................................................. 19
Overview
This document contains information about the SLSC-12251 (16 channel, 8 amperes) and
SLSC-12252 (8 channel, 30 amperes) Fault Insertion Units (FIU). The SLSC-12251 and
SLSC-12252 are switch matrices with current monitoring, which allows for connections from
each channel to any of the following: Bus A, Bus B, a load, or a paired channel. These devices
also provide a voltage that is proportional to the current through the channel. This voltage can
be measured with another device.
Driver Support
Earliest driver support version for the SLSC-12251 and SLSC-12252.
Table 1. SLSC-12251 and SLSC-12252 Driver Support
Driver Earliest Version Support
NI-SLSC 18.5
Cables and Accessories
The following table lists cables and accessories available for your SLSC device. For a
complete list of accessories and ordering information, refer to ni.com.
Table 2. SLSC-12251 and SLSC-12252 Cables and Accessories
Cable/Accessory Compatibility Part Number
RTI-12306 SLSC-12251 and SLSC-12252 785378-01
TB-12396 SLSC-12251 786640-01
TB-12397 SLSC-12251 (<33 Vdc) 786639-01
TB-12398 SLSC-12252 786638-01
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Table 2. SLSC-12251 and SLSC-12252 Cables and Accessories (Continued)
Cable/Accessory Compatibility Part Number
TB-12399 SLSC-12252 (<33 Vdc) 786446-01
SP18M-SP18F Cable SLSC-12251 147945-01
SP8M-SP8F Cable SLSC-12252 148299-01
Safety Guidelines
Caution Observe all instructions and cautions in the user documentation. Using
the model in a manner not specified can damage the model and compromise the
built-in safety protection. Return damaged models to NI for repair.
Safety Voltages
Connect only voltages that are below these limits.
Channel-to-channel isolation
Continuous working voltage
1
100 V peak
Channel-to-earth isolation
Continuous working voltage 100 V peak
Transient overvoltage
2
920 V peak
Caution If you are using the SLSC-12251/12252 with voltages greater than 60
Vdc, the SLSC chassis must be made touch safe by panel mounting it in a closed
rack to prevent user access to the rear of the device.
These test and measurement circuits are rated for measurements performed on circuits not
directly connected to the electrical distribution system referred to as MAINS.
MAINS is a hazardous live electrical supply system to which equipment is designed to be
connected to for the purpose of powering equipment. This product is rated 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.
1
Working voltage rating is the highest RMS value of the AC or DC voltage across the insulation that
can continuously occur when the equipment is supplied at rated voltage.
2
The short duration overvoltage of a few milliseconds or less, oscillatory or non-oscillatory, usually
highly damped.
SLSC-12251 and SLSC-12252 User Manual | © National Instruments | 3
EMC 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.
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.
Notice To ensure the specified EMC performance, operate this product only with
shielded cables and accessories.
Notice To ensure the specified EMC performance, the length of all I/O cables must
be no longer than 3 m (10 ft).
Environmental Characteristics
Temperature and Humidity
Operating temperature 0 °C to 40 °C
3
Storage temperature range -40 °C to 85 °C
Operating relative humidity range 10% to 90%, noncondensing
Storage relative humidity range 5% to 95%, noncondensing
Pollution Degree 2
Maximum altitude 2,000 m (800 mbar) (at 25 °C ambient)
Shock and Vibration
Operating shock 30 g peak, half-sine, 11 ms pulse
Operating vibration, random 5 Hz to 500 Hz, 0.3 g
rms
Non-operating vibration, random 5 Hz to 500 Hz, 2.4 g
rms
3
The chassis internal ambient temperature may reach 85 °C with all slots at the maximum allowed
power dissipation. In the SLSC-12001 chassis this corresponds to an external ambient of 40 °C.
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Installing the SLSC-12251/12252 and
RTI-12306
Figure 1. Installing the RTI-12306 into the SLSC Chassis
Caution Do not touch the contacts or remove the I/O boards or cables while the
system is energized.
Note Install the SLSC-12251/12252 module and its corresponding RTI-12306 in
the chassis at the same time to ensure proper mating alignment. Complete the
following procedure to ensure proper installation of the module and RTI-12306.
1. Power off the main DC power source or disconnect the power source from the chassis
before installing any modules or RTIs.
2. Ensure that the chassis is powered off. The POWER LED should be off. If the POWER
LED is not off, do not proceed until it is off.
Notice The SLSC chassis and the SLSC-12251/12252 do not support hot
plug-in. The entire chassis must be powered off when a module is inserted or
removed.
3. Loosen the screws on the upper rear panel of the chassis.
SLSC-12251 and SLSC-12252 User Manual | © National Instruments | 5
4. Position the RTI-12306 at the desired slot and insert the securing screws, but do not fully
tighten them.
5. Insert an SLSC-12251/12252 module into the same slot as its corresponding RTI-12306
while firmly holding the RTI-12306 in place until the RTI-12306 is firmly connected to
the module.
6. Repeat steps 4 and 5 for all required RTIs.
7. Fully tighten the screws for all RTIs and the upper rear panel of the chassis.
Note Waiting until all RTIs and modules are installed to fully tighten the
screws ensures proper alignment for future connections between modules and
RTIs.
8. Fully tighten the two module mounting screws on each newly installed module.
9. Power on the SLSC chassis.
Getting Started with Software
Use the following three examples to familiarize yourself with the NI-SLSC API. These
examples can be found at file path <LabVIEW installation path>\examples\SLSC
\Example Modules\
4
or in Example Finder: Example Finder>>SLSC>>NI
Module Examples.
SLSC-12251 & 12252 FIU Module Configuration.vi
This VI demonstrates how to use the NI-SLSC API to configure the switches of the
SLSC-12251 and SLSC-12252 FIU modules.
SLSC-12251 & 12252 FIU Module Fault Monitor.vi
This VI demonstrates how to use the NI-SLSC API to find specific fault locations on the
SLSC-12251 and SLSC-12252 FIU modules when a fault occurs.
SLSC-12251 & 12252 FIU Module Current Sensing.vi
Use this conceptual example to integrate current sensing functionality into your own system.
Note To use this VI you must connect a voltage measurement device to the RTI
that is attached to the module.
I/O Organization
DUT connector J1 is the input connection to each channel. LOAD connector J2 is the output
connection to each channel. Bus A and Bus B are common connections available to all
channels through the RTI-12306.
4
A common installation path for the 32-bit version of LabVIEW is C:\Program Files
(x86)\National Instruments\LabVIEW xxxx\examples\SLSC\Example Modules
\.
6 | ni.com | SLSC-12251 and SLSC-12252 User Manual
Each switch is organized into two physical channels, Channel_n and ChannelPair_n, where the
range of n is defined in the following table.
Table 3. Range of Channel Index n
Physical Channel Connections SLSC-12251 SLSC-12252
Channel_n DUTn to LOADn, Bus A, or Bus B 0:15 0:7
ChannelPair_n DUTn to DUTn+1, where n is even 0:7 0:3
Figure 2. Channel Connection Pairs
Current Sense (to RTI)
A
DUT n
(0, 2, 4, 6...)
Current Sense (to RTI)
A
DUT n + 1
(1, 3, 5, 7...)
LOAD n
LOAD n + 1
Bus BBus A
Note All switches are open during power-up and after the module is reset.
SLSC-12251 and SLSC-12252 User Manual | © National Instruments | 7
Properties
Table 4. Fault Monitoring Properties
Property Name Data
Type
Property
Type
Description
NI.FIU.BoardFault Boolean Device True when there is any
fault on the board.
NI.FIU.BoardFault.
BoardOverTemperature
UInt32 Device Starting with the LSB,
each bit represents one of
the board's 4 quadrant
digital temperature
sensors, true when that
sensor exceeds the high
temperature digital
setpoint.
NI.FIU.BoardFault.
OverTemperatureOnChannel
UInt32 Device Starting with the LSB,
each bit represents a
channel, true when that
channel's analog
temperature sensors
exceed the high
temperature analog
transition range.
NI.FIU.BoardFault.
OverTemperatureOnChannelToChannel
UInt32 Device Starting with the LSB,
each bit represents a
channel pair, true when
that channel pair's analog
temperature sensor
exceeds the high
temperature analog
transition range.
NI.FIU.BoardFault.OvercurrentOnBusA Boolean Device True when Bus A
exceeds the Bus High
Current Limit for longer
than its delay time.
NI.FIU.BoardFault.OvercurrentOnBusB Boolean Device True when Bus B
exceeds the Bus High
Current Limit for longer
than its delay time.
8 | ni.com | SLSC-12251 and SLSC-12252 User Manual
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