Verilink PRISM 3001 (34-00186) Product Manual - Manual (Page 29)

Power Connection 2-15
Connect the -48 VDC lead to the -48 VDC terminal (18- to 20-gauge
recommended). Connect the return lead to the 48 VDC return terminal. When
power is applied to the unit, the front panel indicators flash for approximately 10
seconds as the unit executes a self-test function.
If an ambiguous configuration has been programmed, the front panel indicators
continue to flash after the self -test is completed. If the unit is correctly configured,
the green STATUS indicator on the front panel lights.
Chassis
Unit
When operating the 3001 in the 12-slot chassis, all units are powered by -48 VDC
sources which are connected to the 6-position terminal strip TB2 on the rear of the
chassis. The chassis is designed with two power buses. The A bus feeds the odd
slots (1, 3, 5, 7, 9, and 11). The B bus feeds the even slots (2, 4, 6, 8, 10, and 12).
Connect a ground lead (18 - to 20-gauge) to the terminal marked Frame Ground on
TB2, pin 2. Connect the other end of this lead to an appropriate facility ground.
Connect the ground lead before applying power to the unit.
Three modes of powering the chassis are available.
Redundant
Power
Source
The chassis is shipped with a redundant power board installed on power connector TB2.
This board allows the connection of two independent -48 VDC supplies operated in a
redundant mode. All slots in the chassis are powered from the combined input of the A
and B power supplies. If either supply fails, the other powers the entire chassis.
To operate in the redundant power mode, connect the A bus -48 V IN (A) and + 48
V RTN (A) terminals on the redundant power board to the corresponding terminals
of power supply A. Connect the B bus - 48 V IN (B) and + 48 V RTN (B)
terminals to the corresponding terminals of power supply B.
Single
Power
Source
When using a single power source, simply connect the A bus -48 V IN (A) and
+48 V RTN (A) terminals on the redundant power board to the corresponding
terminals of power supply A. This is essentially the same as the redundant
configuration with power supply B not operational.
If not using the redundant power board, the A bus and the B bus must be connected
together on the rear of the chassis with a jumper (pin 3 to pin 4 and pin 1 to pin 6).
Dual
Power
Source
When using a dual independent power supply, one - 48 VDC source feeds the A
bus while another -48 VDC source feeds the B bus. First, remove the redundant
power board. Connect the A bus 48 V Return and -48 VDC terminals to the
corresponding terminals of power supply A (to power the odd-numbered slots).
Connect the B bus 48 V Return and -48 VDC terminals to the corresponding
terminals of power supply B (to power the even-numbered slots).
Each 3001 requires a 165-mA current. Ensure that the proper fuse size is used. Refer to the
1040 Power Shelf configuration guide.
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