User`s guide

2- 32 Agilent B2900 User’s Guide, Edition 2
Introduction
Operation and Functions
Digital I/O Interface
• Connector: 25-pin female D
• Input/output pins: 14 open drain I/O bits
• Absolute maximum input voltage: 5.25 V
• Absolute minimum input voltage: -0.25 V
• Maximum logic low input voltage: 0.8 V
• Minimum logic high input voltage: 2.0 V
• Maximum source current: 1 mA, Vout = 0 V
• Maximum sink current: 50 mA, Vout = 5 V
• 5 V power supply pin:
Limited to 600 mA, solid state fuse protected
• Safety interlock pin:
One active high pin and one active low pin. Activation of both pin enables
output voltage > 42 V.