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SCXI 32-Channel Optically Isolated Digital
Output/Solid-State Relays
SCXI-1163
SCXI-1163R
32 digital outputs
8 banks of 4 lines
300 V
rms
isolation per bank
TTL and CMOS
32 solid-state relays
8 banks of 4 lines
300 V
rms
isolation per bank
Up to 240 VAC/VDC
Driver Software
NI-DAQ Software
Windows 2000/NT/Me/9x
Mac OS
Application Software
LabVIEW
Measurement Studio
Lookout
relay channels of the SCXI-1163R to switch
a wide range of AC and DC voltage and
power signals to control field devices.
Module
Signal Compatibility
TTL/CMOS
EXPRESS
CODES
240 VAC/VDC
SCXI-1163
–
SCXI-1163R
Description
Figure 1 is a block diagram of the SCXI-1163
and SCXI-1163R. The major functions and
operation of the modules are described in
the following paragraphs.
For information or to
buy products online,
visit ni.com/catalog
and enter:
Table 1. SCXI Module Compatibility
Overview
The SCXI-1163 and SCXI-1163R are isolated digital output modules. The
SCXI-1163 has 32 channels of optically-isolated digital outputs, arranged
into eight isolated banks of four output lines each. The SCXI-1163
interfaces to field digital logic signals, eliminating ground-loop
problems and isolating the host computer from damaging voltages.
The SCXI-1163R includes 32 normally open, or Form A, solid-state
relays, arranged into eight banks of four relays with one common pole
for each bank. You can use the SCXI-1163R to switch high-voltage
loads, up to 240 VAC/VDC and up to 200 mA.
The SCXI-1163 and SCXI-1163R are programmed serially over the
SCXIbus. You can therefore easily integrate SCXI-1163 and SCXI-1163R
modules into existing SCXI systems without additional DAQ devices or
cabling. The modules can also operate in parallel mode when cabled
directly to a plug-in DIO device.
scxi1163
scxi1163r
Optically Isolated
Digital Channels/SSRs
The 32 channels of the SCXI-1163 and SCXI-1163R are organized into
eight banks of four channels each. Each bank is optically isolated to
300 V
rms
from each other and from the SCXI chassis earth ground.
The SCXI-1163 digital outputs are open-collector outputs with 4.7 k
Ω
pull-up resistors, as diagrammed in Figure 2. The digital outputs are
compatible with most TTL and CMOS circuits. Each bank of four output
lines share one +5 VDC supply voltage, V
cc
, provided by the user.
Each channel of the SCXI-1163R is an independent, normally open,
Form A, solid-state relay. Each bank of four relays shares one common,
as shown in Figure 3. Each relay is capable of switching up to 200 mA
at 240 VAC/VDC.
Applications
You can use an SCXI system equipped with the SCXI-1163 or SCXI-1163R
in a variety of industrial and laboratory applications. The SCXI-1163 and
SCXI-1163R safely isolate the computer from large common-mode
voltages, ground loops, and voltage spikes that often occur in industrial
and research environments. The SCXI-1163 interfaces directly to field
digital logic signals, such as TTL or CMOS. You can use the solid-state
National Instruments
Tel: (512) 794-0100 • Fax: (512) 683-9300 • info@ni.com • ni.com
527
SCXI 32-Channel Optically Isolated Digital
Output/Solid-State Relays
Parallel
You can also operate the SCXI-1163 and SCXI-1163R in parallel mode,
connecting each module directly to a digital I/O DAQ device – 6503
(DIO-24), 6533 (DIO-32HS), and 6508 (DIO-96). In this configuration,
each channel of the SCXI-1163 or SCXI-1163R module connects to a
corresponding digital output line of the digital I/O device.
Terminal Block
Type
Cabling
Page
SCXI-1326
Screw Terminals
–
539
(777687-26)
Front-mounting
TBX-1326
Screw terminals
SH48-48-B
542
(777207-26)
DIN-rail mount
(183499-01)
Signal Connection
Field digital signals connect to screw terminals located in the SCXI-1326
terminal block, which plugs directly into the front of the SCXI module,
or the TBX-1326, a DIN-rail mountable terminal block that you connect
to the SCXI-1163 or SCXI-1163R using the SH48-48-B shielded cable. See
Table 2 for more information.
Table 2. Terminal Block Options for SCXI-1163 and SCXI-1163R
Vcc (SCXI-1163)
Optically
Isolated
Outputs/SSRs
32
Parallel Data
Data
Register
GND/Common
Serial Data
8 Ports of 4 Digital
Channels
Vcc (SCXI-1163)
Optically
Isolated
Outputs/SSRs
SCXI
Interface
Serial Data
GND/Common
Figure 1. SCXI-1163 and SCXI-1163R Block Diagram
Figure 2. Digital Output Diagram for SCXI-1163
Data Register
The state of the 32 digital output lines or relays is determined by the
value of the 32-bit data register. With the SCXI-1163, a bit set to logic
high generates a logic high at the corresponding output line. With the
SCXI-1163R, a bit set to logic high turns the corresponding solid-state
relay off. A bit set to logic low turns on the solid-state relay, allowing
current to flow. If the module is operating in serial mode, 32-bit
patterns are written serially into the data register by the controlling
DAQ device through the SCXIbus. You can access the data register at
700 words/s. One word corresponds to all 32 digital lines. This
transfer rate was determined using a 500 MHz Pentium III computer.
The data register also has a 32-bit parallel interface to the rear signal
connector (for parallel operation with a plug-in DIO device).
Figure 3. Digital Output Diagram for SCXI-1163R
See page 470 to configure your complete SCXI system.
Modes of Operation
Serial
In serial mode, a single DAQ device writes 32-bit digital patterns to the
data register of one or more SCXI modules through the SCXIbus using
a serial data protocol. This serial-mode operation uses a maximum of
five digital I/O lines of the DAQ device. With serial-mode operation, you
can control several SCXI-1163 and SCXI-1163R modules, along with
other SCXI modules, in one or more chassis with a single DAQ device.
Ordering Information
SCXI-1163
..................................................................776572-63
SCXI-1163R
..............................................................776572-63R
Extended warranty and
value added services
..........................................page 880
528
National Instruments
Tel: (512) 794-0100 • Fax: (512) 683-9300 • info@ni.com • ni.com
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