The NI SCXI-1193 is a high-density, high-frequency RF multiplexer switch module designed for the SCXI (Signal Conditioning eXtensions for Instrumentation) modular data acquisition system. It enables precise signal routing and switching for applications requiring high-frequency performance up to 500 MHz Unlike standard analog input modules, this module focuses on RF signal multiplexing, allowing multiple signal sources to be routed to a single measurement channel or distributed across multiple destinations. Its electromechanical latching relays ensure reliable signal integrity and low insertion loss, making it suitable for demanding test and measurement scenarios
Key differentiators include 32 independent channels with MCX connectors, which support flexible configurations as unterminated multiplexers, externally terminated multiplexers, or dimensionally flexible sparse matrices The module integrates seamlessly with NI’s high-frequency instruments such as the PXI-5404 frequency generator and PXI-5112 high-speed digitizer, enabling complex test system setups .
Signal Handling:
- Frequency Range: DC to 500 MHz with low insertion loss (<0.5 dB typical) and high isolation (>60 dB at 1 GHz) .
- Channel Configuration: Supports topologies like 32x1 multiplexer, quad 8x1 multiplexer, and sparse matrix for flexible signal routing .
- Cable Compatibility: MCX-MCX, MCX-BNC, MCX-SMB, and MCX-SMA cables (0.3 m or 1.0 m lengths)
Performance & Reliability:
- Relay Technology: Electromechanical latching relays with 50 million mechanical operations lifespan and 100 operations/second scan rate .
- Isolation: Galvanic isolation between RF channels and control signals to mitigate ground loops .
- Environmental Resistance: Operates in 0°C to 50°C with non-condensing humidity (5%–85%), suitable for industrial environments .
Integration & Control:
- SCXI Bus Compatibility: Mounts in SCXI-1000 series chassis for modular expansion
- Software Support: NI-Switch driver for LabVIEW, LabWindows/CVI, and other programming environments
- Triggering: Dedicated SMB trigger connectors for synchronous operation with external devices .
| Parameter | Description |
|---|
| Channels | 32 independent RF channels (MCX connectors) |
| Frequency Range | DC to 500 MHz |
| Insertion Loss | <0.5 dB @ 1 GHz |
| Isolation | >60 dB @ 1 GHz |
| Relay Type | Electromechanical latching |
| Max. Power Handling | 10 W continuous |
| DC Resistance | <1.0 Ω (initial), <2.0 Ω (end-of-life) |
| Power Requirements | +5 VDC (50 mA), ±18.5–25 VDC (170 mA each) |
| Physical Dimensions | 1.2" × 6.8" × 7.8" (30.7 × 173 × 198 mm) |
| Weight | 2 oz (56.7 g) |
| Certifications | CE marked (EN 61326-1 compliant) |
Modular Architecture:
- Rack-mounted in SCXI-1000 chassis with hot-swappable design for easy maintenance .
- High-Density MCX Connectors: 36 MCX I/O jacks and 2 SMB trigger connectors for compact cabling .
Redundancy & Fault Tolerance:
- Built-in self-test (BIST) for relay health monitoring .
- Optional redundant power supplies for mission-critical applications .
Industrial Compliance:
- Designed for shock (50 G peak) and vibration (2.5 G RMS) resistance .
- Extended temperature range for extreme environments .
| Parameter | Description |
|---|
| Communication Protocol | Modbus RTU/ASCII (single channel) |
| Interface | MU-TSIM 12 (serial device interface) |
| Input Voltage | 24 VDC ±10% (1.2 A max), redundant inputs supported |
| Baud Rate | 1200–19200 bps (programmable) |
| Signal Isolation | 2.5 kV galvanic isolation |
| UCN Network Speed | 1 Mbps |
| Operating Temperature | -40°C to +70°C (operation); -40°C to +85°C (storage) |
| Certifications | CE, IEC 61508 SIL 2 (estimated) |
| Physical Dimensions | 120 mm × 80 mm × 30 mm (rack-mounted) |
| Weight | 0.29 kg (0.64 lbs) |
Modular Architecture:
- Rack-mounted in Honeywell UCN I/O chassis, supporting scalable I/O expansion with up to 8 modules per rack.
- Hot-swappable: Allows module replacement without system shutdown, minimizing maintenance downtime.
Redundancy & Fault Tolerance:
- Built-in self-test (BIST) with diagnostic alerts for communication errors, parity mismatches, or signal drift.
- Optional dual power supplies and communication paths for fault-tolerant operation .
Industrial Compliance:
- Designed for shock (50 G peak) and vibration (2.5 G RMS) resistance, compliant with IEC 60068-2 standards.
- Extended temperature range (-40°C to +70°C) for extreme industrial environments
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