Reinstalling the T640 Power Supplies
Each two-input 160-A DC power supply weighs approximately 23 lb (10.5 kg). Each three-input 240-A DC power supply weighs approximately 25 lb (11.3 kg). Each four-input 240–A weighs approximately 26.6 lb (12.0 kg).
Reinstall the lower power supply first, then the upper power supply. To reinstall the power supplies, see Figure 1.
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site. For more information about ESD, see T640 Preventing Electrostatic Discharge Damage.
- Switch the circuit breakers on the power supply faceplate to the off position (O).
- Using both hands, slide the power supply into the chassis until you feel resistance.
- Twist the ejector handles at the upper corners of the power supply faceplate clockwise until they stop.
- Tighten the captive screws at the lower corners of the power supply faceplate to secure the power supply in the chassis.
- Repeat the procedure for the upper power supply.
 | Caution: Removing the T640 Power Supplies shows the two-input 160-A DC power supply, but the procedure also applies to the three-input 240-A DC power supply or four-input 240-A DC power supply. |
Figure 1: Reinstalling a Power Supply
