Technical data
Table Of Contents
- Technical Reference Manual for OEMs HP Models 743, 744, and 748
- Contents
- 1 General Information
- Model 743 and Model 744 VME Board Computers
- Product Description
- Supported Configurations
- Model 743 and Model 744 External Devices
- Keyboard and Mouse
- Model 743 and Model 744 Cables
- Model 743 and Model 744 Functional Description
- Model 744 Block Diagram
- CPU Circuit
- Boot ROM Circuit
- Graphics Circuit
- Model 743 Memory Controller Circuit
- Model 744 Memory Controller Circuit
- LED Displays
- I/O Controller ASIC
- VME Controller ASIC
- I/O Expansion
- I/O Expansion Block Diagrams
- Model 748 Ruggedized Workstation
- Model 743 and Model 744 VME Board Computers
- 2 References
- 3 Quality
- 4 Mechanical Information
- 5 Electrical Information
- Video Connector Pinouts
- Audio Connector Pinouts
- HP Parallel Connector Pinouts
- RS-232 Connector Pinouts
- AUI LAN Connector Pinouts
- Single-Ended SCSI Connector Pinouts
- FW SCSI Connector Pinout
- PS/2 Connector Pinouts
- VME Connector Pinouts
- Real-Time Clock (RTC) Battery Information
- Video Output Signal Specifications
- Video Timing Specifications
- 6 Power Requirements
- 7 Product Design Considerations
- Index
4-4
Mechanical Information
Model 743 and Model 744 VME Board Computers
Air Flow Requirements
The air flow requirements for the Model 743 and Model 744 are as follows:
46 linear meters (150 linear feet) per minute, -5 Deg C to 35 Deg C (23 Deg F to 95 Deg F)
61 linear meters (200 linear feet) per minute, 35 Deg C to 55 Deg C (95 Deg F to 151 Deg F)
NOTE: Model 743 and Model 744 VME Board Computers are to be operated only in an environment
that is free from conductive pollution, including dry non-conductive pollution which could
become conductive due to expected condensation.
CAUTION: Integrated circuit case and junction temperatures must not exceed those shown in
Figure 4-3 and Figure 4-4.
Figure 4-3 Model 743 Integrated Circuit Case Temperature Limits