Bustec 3940 - Commutation

32-Channel Relay/Switching Card w. Solid State Relays and Protection

The ProDAQ 3940 switching function card is a high-density card that fits into ProDAQ VXIbus motherboards and LXI function card carriers. The ProDAQ 3940 function card is a switching card with 32 independently controlled reed or solid-state relays. Two relays occupy three terminals on the function card front-panel connector, sharing one common terminal.

An optional low-resistance, resettable positive temperature coefficient (PTC) fuse ensures protection of relay contacts when faulty conditions, such as overcurrent, occur. Two surge suppressors provide overvoltage protection of relay contacts. Magnetic screening of relays allows for dense packing and eliminates problems of magnetic interaction.

• High-quality screened relays
• Switches up to 0.9 A, carry 1.0 A
• 32 independently controlled relays per function card
• Built-in relay protection (optional)
• On-path resistance as low as 0.3 Ω
• Driver support for Windows, VxWorks, and Linux