NI SCXI-1162 32-Channel Optically Isolated TTL/CMOS Digital Input

The NI SCXI-1162 is a 32-channel digital input module for TTL and CMOS signal acquisition in industrial and laboratory settings. Each bank of four input lines features optical isolation rated to 300 Vrms, with 2,300 Vrms transient overvoltage protection to eliminate ground loop interference and noise coupling. The module integrates directly into SCXI chassis systems and connects to National Instruments data acquisition boards via SCXIbus or rear signal connectors, supporting both serial and parallel data transmission modes.

– Technical Specifications

• Channels: 32 optically isolated digital inputs
• Input Signal Compatibility: TTL and CMOS logic signals
• Isolation: 300 Vrms per bank of four channels; 2,300 Vrms transient overvoltage protection
• Reference Voltage Range: +5 to +10 V (one shared reference per four-channel bank)
• Input Impedance: 360 ohms (series optoisolator current limiting resistor)
• Data Rate: 580 reads per second (serial mode)
• Dimensions: 1.2 × 6.8 × 8.0 inches
• Weight: 0.1 kg

– Key Features

• Optical isolation on each four-channel bank prevents ground loop interference
• Configurable reference voltage from +5 to +10 V per bank
• Series 360 ohm current-limiting resistor protects optoisolator circuits
• Six user-configurable jumpers for rear connector configuration
• Front signal connector and SCXI-1326 shielded terminal block compatibility

– Compatibility & Integration

The SCXI-1162 operates with National Instruments MIO and DIO data acquisition boards, including MIO-16, AT-MIO-64F-5, DIO-24, DIO-32F, DIO-96, and M Series devices. It installs in any available SCXI chassis slot and operates under NIDAQmx driver software with LabVIEW, LabWindows/CVI, and Measurement Studio development environments.