ZT 6311 150-Watt Hot-Swap DC Power Supply

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The ZT 6311 Hot-Swap DC Power Supply is a highly reliable modular package designed for DC power input systems. This highly dense, redundant supply is ideally suited for telecommunications, industrial automation and a variety of embedded computer applications utilizing the CompactPCI? 3U form factor.

The input voltage range is 36 to 72VDC. Four outputs are capable of providing a total of 150W for +3.3VDC, +5VDC and ?12VDC with independent output regulation. The low-cost unit meets the electrical and mechanical requirements of the PICMG? specification for CompactPCI systems. It uses a DIN power connector to provide efficient, effective DC connectivity and is UL, CSA, IEC, TUV and CE certified.

The ZT 6301 150-Watt Hot-Swap AC Power Supply is available as an AC alternative.

Highlights

• Hot-swap N+1 load sharing
• DIN input/output connector
• Protection features:
  • Overvoltage
  • Short circuit?all outputs
  • Overtemperature protection
• Status LEDs?Fault, Input OK
• Status output signals?(DEG#), (FAL#)
• Main output remote sense (+3.3V, +5V)
• Built-in EMI filter
• Eurorack-compatible module
• Front drawer-style handle

Design Elements

Operation
The ZT 6311 150W power supply utilizes switching technology to achieve its small size and large power output. An EMI-filtered input automatically accepts DC input voltages from 36 to 72 volts. Optionally, two or more power supplies can be used to implement an N+1, load sharing, fault-tolerant system.

Load Sharing and N+1 Redundancy
Two power supplies can share the same input source. These two supplies each supply approximately 50 percent of the total system power during normal operation, although either is capable of powering the entire system in the event that the other should fail (with a 150W load). This feature increases overall system reliability by sharing the load responsibilities. Additional power supplies may be used to implement true N+1 load sharing (i.e., a 300W system requires two power supplies, plus a third for redundancy).

Hot-Swap and Fault Tolerance
The ZT 6311 power supply can be inserted or removed from the system without disturbing operation or reducing the reliability of any associated devices. Likewise, a failed power supply will not disturb the operation of the system if a redundant power supply is operating in the system.

Status LEDs
Two status LED indicators are visible from the front of the power supply. The green "INPUT" LED indicates that the input voltage is present. The amber "FAULT" LED indicates a failed power supply or input source.

Remote Sense
A common, remote sense on the +3.3V and +5V power supply outputs will detect the voltage at a load remote from the power supply, compensating for connector, backplane and wiring voltage drops. The 3S+ and 5S+ signals should be connected to the proper load.

Inhibit/Enable Inputs
The INH# input signal on the rear connector will turn off the outputs when grounded. The enable (EN#) input must always be connected to ground.

System Notification
Two fault outputs are available on the rear connector for system notification. One output (DEG#) is an open collector, low true signal that indicates the internal temperature is approaching 90 C. If action does not reverse the internal temperature rise, at 100 C the supply will shut off the outputs. The second output (FAL#) is an open collector, low true signal that indicates when the supply has a problem, or the input voltage has been removed.