National Instruments 776572-29 Matrix/Multiplexer Switch Module

The part number 776572-29 from National Instruments is the identifying part number for the SCXI-1129 Matrix/Multiplexer Switch Module. This is a 256-crosspoint relay matrix module designed for the SCXI platform. It supports multiple 2-wire matrix topologies, including 16 × 16, 4 × 64, 8 × 32, quad 4 × 16, dual 4 × 32, and dual 8 × 16 configurations allowing users to customize the matrix to fit specific application requirements.

This module can handle a maximum switching voltage of 150 Volts for both channel-to-channel or channel-to-earth configurations making this device suitable for low signal routing when used in testing environments. The maximum switching power per channel of this module is 30 Watts with a maximum switching current of 1 Amperes or a maximum carrying current of 2 Amperes per channel. The module can handle a maximum module current of 5 Amperes to ensure the safe and reliable operation of this device. 

776572-29 produces fast relay operating and release times. The maximum relay operating time of this module is 4 ms while the maximum release time of this module is also 4 ms.  The module supports a maximum scan rate of 100 crosspoints per second, allowing for rapid signal routing and testing. The expected relay life is 5 × 10^7 mechanical cycles and 1 × 10^5 electrical cycles at maximum load, providing long-term reliability.

Since this device is made using electromechanical latching and unlatching relays, for durability and longevity the latches are made up of gold and silver contact materials. The module operates on 18.5 volts while consuming 6.3 Watts or 200 mW when operating at 5 volts. This module has a compact and portable design with dimensions of 19.8 cm × 3.0 cm × 17.3 cm (7.8 in. × 1.2 in. × 6.8 in.) and weighs 725 g (1 lb 10 oz). This multiplexer module has an operating temperature range of 0 °C to 55 °C and a storage temperature range of -40 °C to 71 °C.  It supports a relative humidity range of 10% to 90%, noncondensing, for operation, and 5% to 95%, noncondensing, for storage.