PRELIMINARY DATASHEET

DS_DIM3R3_03252009

4

DIM3R3 INTERNAL BLOCK DIAGRAM

PIN FUNCTIONS

PIN NO.

PIN NAME

DESCRIPTION

1

-48_AF

-48V_A Feed (Externally Fused)

2

-48_BF

-48V_B Feed (Externally Fused)

3

VRTN_AF

VRTN_AF Feed (Externally Fused)

4

VRTN_BF

VRTN_BF Feed (Externally Fused)

5

ENABLE_AF

ENABLE_AF Feed (Externally Fused) (Short Pin, connected to VRTN_AF on the back plane)

6

ENABLE_BF

ENABLE_BF Feed (Externally Fused) (Short Pin, connected to VRTN_BF on the back plane)

7

SHELF_GND

Shelf / Chassis / Safety Ground

8

72V_CAP

Holdup/Bulk capacitor output voltage (Negative Connection to -48V_OUT)

9

-48V_OUT

OR’d and Inrush Protected –48V Output Bus

10

MGMT_PWR

3.3V Isolated Management Power Output (reference to LOGIC_GND)

This pin is optional for 5V Isolated Management Power Output (reference to LOGIC_GND)

11

5V BLUE_LED_PWR

This pin is optional for 5V Isolated Blue LED Power output (reference to LOGIC_GND)

12

LOGIC_GND

Logic / Secondary / Isolated Ground

13

-48V_ALARM

Opto-isolated -48V A/B Feed Loss or Open Fuse Alarm (reference to LOGIC_GND)

14

VRTN_OUT

OR’d and Inrush Protected VRTN Output Bus