Agilent / HP 44729a

The 44729A provides eight channels of programmable AC line voltage (12 to 250 Vac) switching and distribution. Load switching for each channel is provided by a hybrid mechanical relay and silicon controlled rectifier (SCR) circuit. This design provides switching at very close to zero current, minimum switching noise (RFI), extended relay life, and minimum power dissipation.

Switching relays are SPST Form A, with contacts normally open (NO). Only the hot (H) output lead from the terminal module is switched with the neutral (N) output lead always connected to the AC main input. Relay contact protection is provided by a built-in sunbber network, with no additional protection required.

• Maximum input voltage per channel: 350 Vpeak, 250 Vrms
  
• Maximum input current: 2.5 Arms per channel
  
• Off-state voltage range: 9 to 250 Vac
  
• Off-state leakage: 0.5 mA
  
• Maximum load: 2.5 A each for eight channels (20 A max), or 3 A each for 5 channels, with a total of 1 A for the last three channels (16 A max)
  
• Minimum voltage: 12 Vrms for proper operation
  
• Non-repetitive surge current: 50 A
  
• Recommended switching speed: Two operations per minute
  
• Response time: 6 to 30 ms turn-on, 14 to 34 ms turn-off
  
• Fuse protection: 4 A fuse each channel
  
• Isolation between channels: Neutral common to all channels
  
• Isolation channel-to-chassis: 354 Vpeak
  
• Maximum wire size: 12 AWG