64-Channel External Relay Driver
NI PXI-2567, NI SCXI
™
-1167
• Controls up to 64 single-side stable
relays (or 32 2-coil latching relays)
• Accepts internal and external power
•
Up to 50 V
•
Up to 600 mA per channel
• High-power protection circuitry
• Hardware or software scanning
• 32,000-step scan list for deterministic
scanning
• Programmable switching delay
NEW
Operating Systems
• Windows 2000/NT/XP
Recommended Software
• LabVIEW
™
• LabWindows
™
/CVI
™
• Measurement Studio
• NI Switch Executive
Other Compatible Software
• Visual Basic
• C/C++
Applications
• High-current relays
• RF relays
• Small DC motors
• Existing embedded relays
Driver Software (included)
• NI-SWITCH
Overview
The National Instruments PXI-2567 and SCXI-1167 are designed to
be 64-channel, multipurpose relay drive modules, capable of driving
many types of external relays. The relay driver is the ideal choice
when the current and voltage requirements for relays exceed those
found in existing relay modules (or for relays embedded in a test
system). High-current, high-voltage, or multipole RF switches all fit
into the realm of possibilities. The NI PXI-2567 and NI SCXI-1167
can also drive small DC motors or other inductive relay coils.
Automatic Scanning
The PXI-2567 and SCXI-1167 are able to maximize throughput in
automated test applications by the use of scanning. Scanning
improves throughput by downloading a list of up to 32,000
connections to the switch modules and cycling through the list using
an event (trigger) without any interruption from the host processor.
Scanning is most efficiently accomplished by mating the PXI-2567 or
SCXI-1167 with an instrument, such as the NI PXI-4070 FlexDMM,
that issues a trigger after each measurement.
Internal and External Power Support
The PXI-2567 and SCXI-1167 can provide up to 50 V or 600 mA of
drive capacity per channel when connected to an external power
supply. Without an external power supply, the PXI-2567 can source
up to 1.25 A from the 5 V pin or 500 mA from the 12 V pin provided
by the PXI backplane. The SCXI-1167 can supply up to 750 mA at
5 V without an external power source. No one channel can drive
more than 600 mA with either an internal or external source, and
total module current is limited to 25 A of simultaneous drive.
Software
All National Instruments PXI and SCXI switch modules are shipped
with NI-SWITCH, an IVI-compliant driver offering complete
functionality for all switch modules. For additional assistance in
configuring, programming, and managing higher-channel-count
switching systems, NI Switch Executive software offers an easy-to-use
intelligent switch management and visual routing environment.
Protection Circuitry
The eight banks of eight drivers in the PXI-2567 and SCXI-1167
protect against overvoltage and overcurrent conditions. When the
condition clears, the channel is automatically reset so no disassembly
of the module is required. A fly-back diode is also included to protect
against damage from inductive loads.
NI [ NATIONAL INSTRUMENTS CORPORATION ]
