Description

NI SHC68-68-RMIO (Official Part: SHC68M-68F-RMIO) R Series RIO Shielded I/O Connection Cable

Technical Specifications

• Product Model: SHC68-68-RMIO (Full part number SHC68M-68F-RMIO)
• Brand: National Instruments (NI)
• Warranty: One Year
• Input Voltage: Passive signal transmission, no power supply required
• Operating Temperature: 0°C to +70°C
• Storage Temperature: -40°C to +85°C
• Response Time: Zero signal latency for analog/digital DAQ sampling
• Protection Class: Fully shielded overall copper braided shielding, IP20 indoor laboratory/rack use
• Accuracy Class: Maintains full 16/24-bit DAQ conversion resolution without signal attenuation
• Output Frequency: Supports maximum DAQ board sampling rate up to 1MS/s
• Rated Current Range: Low-level analog signal loop current ≤10mA per wire
• Communication Interface: One end 68-pin VHDCI male plug (connects to NI R Series RIO FPGA board), other end 68-pin D-SUB SCSI female port (terminate to CB-68LP terminal block)
• Supported Protocols: NI RIO FPGA reconfigurable I/O bus, analog voltage/current sampling, digital DIO, counter/timer pulse acquisition
• Overload Capacity: Full EMC shielding against radiated and conducted electromagnetic interference, ESD protection for signal lines
• Dimensions: Standard 1m (PN 189588-01) and 2m (PN 189588-02) two length options, outer diameter 9.2mm
• 

Product Overview

The SHC68-68-RMIO is a dedicated fully shielded signal cable designed exclusively for NI R Series Reconfigurable I/O (RIO) FPGA DAQ modules such as PXIe-7820, PXI-7831 and PCIe-7842R. It bridges the compact VHDCI high-density port on the RIO controller to standard 68-pin D-SUB terminal breakout blocks, routing multi-channel analog input/output, digital switching and high-speed counter signals between the FPGA hardware and external sensors, actuators and test fixtures.

It addresses critical signal integrity pain points in high-precision measurement and FPGA control systems, including unshielded cables introducing crosstalk and noise that distort low-voltage analog readings, mismatched pin assignment causing RIO FPGA resource mapping errors, fragile unprotected conductors failing under frequent cabinet routing, and incompatibility between VHDCI mini connectors and conventional SCSI terminal accessories. Constructed with continuous overall metal shielding, oil-resistant flexible PVC jacket and locking screw-locked connectors, the cable preserves clean, undistorted data transmission inside electrical cabinets with inverters, servo drives and switching power supplies that generate heavy electromagnetic noise.