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