70-0409-139R

SMX-3277DS is a (2) 1x76, 1-wire multiplexer. The PXIe high-density multiplexer modules designed for scanning of multiple points to a common bus, in 1-wire configuration mode. It consists of two individual (1 x76) multiplexers. In contrast to the SMX-3277 the SMX-3277DS has internal residual voltage discharge relays that can be enabled to momentarily short out the measurement path when changing from one i/p channel to the next. This dissipates any voltage held by the wiring and instrument input capacitance. These relays protect sensitive devices, such as CMOS circuits, from residual voltages caused by previous high-voltage measurements. This feature can also be disabled in low-voltage applications where maximum throughput speed is important. It incorporates extensive signal shielding and exposes shield pins on the front panel connector for tying to the cable shield. This preserves signal integrity throughout the signal path by maintaining the signals at same reference level as the UUT.

• Maximum switching voltage of 300VAC, 300VDC
• Maximum switching current is 2A
• Maximum switching power is 60W DC
• Switching time <lt/>8ms